Merge branch 'overlay_h' of https://gitlab.com/Nemirtingas/goldberg_emulator

# Conflicts:
#	build_steamos.sh
#	dll/dll.cpp

.gitignore

@@ -15,3 +15,4 @@ rtlgenrandom*
 steamclient.exp
 steamclient.lib
 out/*
+glew

.gitlab-ci.yml

@@ -59,7 +59,8 @@ build_windows:
   image: fedora:29
 
   script:
-      - dnf -y install wine wget p7zip sed dos2unix
+      - dnf -y install wine wget p7zip sed dos2unix unzip
+      - ./download_glew.sh
       - unix2dos *.txt
       - unix2dos files_example/*.txt files_example/*/*.txt
       - sed -i 's/..\\vcpkg\\packages\\/.\\/g' build_set_protobuf_directories.bat
@@ -71,6 +72,11 @@ build_windows:
       - 7za x sdk_standalone.7z -osdk_standalone
       - DLL_FILES="$(ls dll/*.cpp | tr "\n" " ")"; sed "s|dll/\*.cpp|$DLL_FILES|g" -i *.bat
       - DLL_FILES="$(ls detours/*.cpp | tr "\n" " ")"; sed "s|detours/\*.cpp|$DLL_FILES|g" -i *.bat
+      - DLL_FILES="$(ls overlay_experimental/*.cpp | tr "\n" " ")"; sed "s|overlay_experimental/\*.cpp|$DLL_FILES|g" -i *.bat
+      - DLL_FILES="$(ls overlay_experimental/windows/*.cpp | tr "\n" " ")"; sed "s|overlay_experimental/windows/\*.cpp|$DLL_FILES|g" -i *.bat
+      - DLL_FILES="$(ls ImGui/*.cpp | tr "\n" " ")"; sed "s|ImGui/\*.cpp|$DLL_FILES|g" -i *.bat
+      - DLL_FILES="$(ls ImGui/impls/*.cpp | tr "\n" " ")"; sed "s|ImGui/impls/\*.cpp|$DLL_FILES|g" -i *.bat
+      - DLL_FILES="$(ls ImGui/impls/windows/*.cpp | tr "\n" " ")"; sed "s|ImGui/impls/windows/\*.cpp|$DLL_FILES|g" -i *.bat
       - DLL_FILES="$(ls dll/*.proto | tr "\n" " " | sed "s/.proto/.pb.cc/g")"; sed "s|dll/\*.cc|$DLL_FILES|g" -i *.bat
       - DLL_FILES="$(ls steamclient_loader/*.cpp | tr "\n" " ")"; sed "s|steamclient_loader/\*.cpp|$DLL_FILES|g" -i *.bat
       - export WINEDEBUG=-all
@@ -98,7 +104,7 @@ build_cmake_linux:
   script:
     - mkdir cmake-builds && cd cmake-builds
     - mkdir x64-release && cd x64-release
-    - cmake ../../ -G "Ninja" -DCMAKE_BUILD_TYPE:STRING="RelWithDebInfo" && ninja
+    - cmake ../../ -G "Ninja" -DCMAKE_BUILD_TYPE:STRING="RelWithDebInfo" -DNO_OVERLAY=ON && ninja
     - cd ..
 #    - mkdir x64-experimental-release && cd x64-experimental-release
 #    - cmake ../../ -G "Ninja" -DCMAKE_BUILD_TYPE:STRING="RelWithDebInfo" -DEMU_EXPERIMENTAL_BUILD:BOOL=ON && ninja
@@ -114,13 +120,14 @@ build_cmake_windows:
   image: fedora:29
 
   before_script:
-    - dnf -y install wine wget p7zip sed dos2unix
+    - dnf -y install wine wget p7zip sed dos2unix unzip
     - wget 'https://gitlab.com/Mr_Goldberg/goldberg_emulator/uploads/48db8f434a193aae872279dc4f5dde6a/sdk_standalone.7z'
     - 7za x sdk_standalone.7z -osdk_standalone
     - wget 'https://github.com/Kitware/CMake/releases/download/v3.15.0-rc1/cmake-3.15.0-rc1-win64-x64.zip'
     - 7za x cmake-3.15.0-rc1-win64-x64.zip
     - wget 'https://gitlab.com/Mr_Goldberg/goldberg_emulator/uploads/0119304e030098b4821d73170fe52084/protobuf_x64-windows-static.7z'
     - 7za x protobuf_x64-windows-static.7z -oprotobuf_x64-windows-static
+    - ./download_glew.sh
 
   script:
     - export WINEDEBUG=-all
@@ -128,13 +135,13 @@ build_cmake_windows:
     - mkdir cmake-builds && cd cmake-builds
     - mkdir x64-release && cd x64-release
     - echo call .\\..\\..\\sdk_standalone\\set_vars64.bat >> cmake-build.bat
-    - echo .\\..\\..\\cmake-3.15.0-rc1-win64-x64\\bin\\cmake.exe ..\\.. -G \"NMake Makefiles\" -DCMAKE_BUILD_TYPE:STRING="RelWithDebInfo" -DCMAKE_PREFIX_PATH="protobuf_x64-windows-static" -DProtobuf_PROTOC_EXECUTABLE:STRING="./../../protobuf_x64-windows-static/tools/protobuf/protoc.exe" >> cmake-build.bat
+    - echo .\\..\\..\\cmake-3.15.0-rc1-win64-x64\\bin\\cmake.exe ..\\.. -G \"NMake Makefiles\" -DCMAKE_BUILD_TYPE:STRING="RelWithDebInfo" -DNO_OVERLAY=ON -DCMAKE_PREFIX_PATH="protobuf_x64-windows-static" -DProtobuf_PROTOC_EXECUTABLE:STRING="./../../protobuf_x64-windows-static/tools/protobuf/protoc.exe" >> cmake-build.bat
     - echo nmake.exe >> cmake-build.bat
     - wine cmd /c cmake-build.bat
     - cd ..
     - mkdir x64-experimental-release && cd x64-experimental-release
     - echo call .\\..\\..\\sdk_standalone\\set_vars64.bat >> cmake-build.bat
-    - echo .\\..\\..\\cmake-3.15.0-rc1-win64-x64\\bin\\cmake.exe ..\\.. -G \"NMake Makefiles\" -DCMAKE_BUILD_TYPE:STRING="RelWithDebInfo" -DCMAKE_PREFIX_PATH="protobuf_x64-windows-static" -DProtobuf_PROTOC_EXECUTABLE:STRING="./../../protobuf_x64-windows-static/tools/protobuf/protoc.exe" >> cmake-build.bat
+    - echo .\\..\\..\\cmake-3.15.0-rc1-win64-x64\\bin\\cmake.exe ..\\.. -G \"NMake Makefiles\" -DCMAKE_BUILD_TYPE:STRING="RelWithDebInfo" -DEMU_EXPERIMENTAL_BUILD=ON -DCMAKE_PREFIX_PATH="protobuf_x64-windows-static" -DProtobuf_PROTOC_EXECUTABLE:STRING="./../../protobuf_x64-windows-static/tools/protobuf/protoc.exe" >> cmake-build.bat
     - echo nmake.exe >> cmake-build.bat
     - wine cmd /c cmake-build.bat
     - cd ..

CMakeLists.txt

@@ -50,12 +50,14 @@ if(WIN32)
 	  set(LIB_STEAMNETWORKINGSOCKETS steamnetworkingsockets64)
 	  set(BIN_LOBBY_CONNECT lobby_connect64)
 	  set(BIN_GENERATE_INTERFACES_FILE generate_interfaces_file64)
+	  link_directories(glew/lib/Release/x64)
   else()
     set(LIB_STEAM_API steam_api)
 	  set(LIB_STEAMCLIENT steamclient)
 	  set(LIB_STEAMNETWORKINGSOCKETS steamnetworkingsockets)
 	  set(BIN_LOBBY_CONNECT lobby_connect)
 	  set(BIN_GENERATE_INTERFACES_FILE generate_interfaces_file)
+	  link_directories(glew/lib/Release/Win32)
   endif()
 elseif(UNIX AND NOT APPLE)
   set(LIB_STEAM_API steam_api)
@@ -77,6 +79,24 @@ file(GLOB DETOURS_SRC_SHARED
 	detours/*.cpp
 )
 
+if(WIN32)
+  file(GLOB OVERLAY_EXPERIMENTAL_SRC_SHARED
+    overlay_experimental/*.cpp
+    overlay_experimental/windows/*.cpp
+    ImGui/*.cpp
+    ImGui/impls/*.cpp
+    ImGui/impls/windows/*.cpp
+  )
+elseif(UNIX)
+  file(GLOB OVERLAY_EXPERIMENTAL_SRC_SHARED
+    overlay_experimental/*.cpp
+    overlay_experimental/linux/*.cpp
+    ImGui/*.cpp
+    ImGui/impls/*.cpp
+    ImGui/impls/linux/*.cpp
+  )
+endif()
+
 ###################################################
 # Setup for the steam_api(64).dll / libsteam_api.so
 ###################################################
@@ -85,6 +105,7 @@ file(GLOB DETOURS_SRC_SHARED
 add_library(${LIB_STEAM_API}
   SHARED
 	$<$<BOOL:${EMU_EXPERIMENTAL_BUILD}>:${DETOURS_SRC_SHARED}>
+	$<$<AND:$<BOOL:${EMU_EXPERIMENTAL_BUILD}>,$<NOT:$<BOOL:${NO_OVERLAY}>>>:${OVERLAY_EXPERIMENTAL_SRC_SHARED}>
   ${DLL_SRC_SHARED}
   ${PROTO_SRCS}
   ${PROTO_HDRS}
@@ -95,6 +116,8 @@ target_include_directories(${LIB_STEAM_API}
   PRIVATE
   ${PROTOBUF_INCLUDE_DIRS}
   ${CMAKE_CURRENT_BINARY_DIR}
+  ${CMAKE_CURRENT_SOURCE_DIR}/ImGui
+  ${CMAKE_CURRENT_SOURCE_DIR}/glew/include
 )
 
 # Link the required libraries
@@ -103,6 +126,9 @@ target_link_libraries(${LIB_STEAM_API}
 	protobuf::libprotobuf
 	$<$<BOOL:${WIN32}>:ws2_32>
 	$<$<BOOL:${WIN32}>:iphlpapi>
+	$<$<AND:$<BOOL:${WIN32}>,$<BOOL:${EMU_EXPERIMENTAL_BUILD}>,$<NOT:$<BOOL:${NO_OVERLAY}>>>:glew32s.lib>
+	$<$<AND:$<BOOL:${WIN32}>,$<BOOL:${EMU_EXPERIMENTAL_BUILD}>,$<NOT:$<BOOL:${NO_OVERLAY}>>>:opengl32.lib>
+	$<$<AND:$<BOOL:${WIN32}>,$<BOOL:${EMU_EXPERIMENTAL_BUILD}>,$<NOT:$<BOOL:${NO_OVERLAY}>>>:Winmm.lib>
 )
 
 # Add target compile definitions
@@ -113,6 +139,8 @@ target_compile_definitions(${LIB_STEAM_API}
 	$<$<CONFIG:RelWithDebInfo>:EMU_RELEASE_BUILD>
 	$<$<CONFIG:MinSizeRel>:EMU_RELEASE_BUILD>
 	$<$<BOOL:${EMU_EXPERIMENTAL_BUILD}>:EMU_EXPERIMENTAL_BUILD>
+	$<$<BOOL:${NO_OVERLAY}>:NO_OVERLAY>
+	$<$<AND:$<BOOL:${WIN32}>,$<BOOL:${EMU_EXPERIMENTAL_BUILD}>,$<NOT:$<BOOL:${NO_OVERLAY}>>>:GLEW_STATIC>
 )
 
 # Install the target
@@ -237,6 +265,7 @@ target_link_libraries(${BIN_LOBBY_CONNECT}
 target_compile_definitions(${BIN_LOBBY_CONNECT}
 	PRIVATE
 	NO_DISK_WRITES
+	NO_OVERLAY
 	LOBBY_CONNECT
 	$<$<CONFIG:>:EMU_RELEASE_BUILD>
   $<$<CONFIG:Release>:EMU_RELEASE_BUILD>

ImGui/imconfig.h

@@ -0,0 +1,97 @@
+//-----------------------------------------------------------------------------
+// COMPILE-TIME OPTIONS FOR DEAR IMGUI
+// Runtime options (clipboard callbacks, enabling various features, etc.) can generally be set via the ImGuiIO structure.
+// You can use ImGui::SetAllocatorFunctions() before calling ImGui::CreateContext() to rewire memory allocation functions.
+//-----------------------------------------------------------------------------
+// A) You may edit imconfig.h (and not overwrite it when updating Dear ImGui, or maintain a patch/branch with your modifications to imconfig.h)
+// B) or add configuration directives in your own file and compile with #define IMGUI_USER_CONFIG "myfilename.h"
+// If you do so you need to make sure that configuration settings are defined consistently _everywhere_ Dear ImGui is used, which include
+// the imgui*.cpp files but also _any_ of your code that uses Dear ImGui. This is because some compile-time options have an affect on data structures.
+// Defining those options in imconfig.h will ensure every compilation unit gets to see the same data structure layouts.
+// Call IMGUI_CHECKVERSION() from your .cpp files to verify that the data structures your files are using are matching the ones imgui.cpp is using.
+//-----------------------------------------------------------------------------
+
+#pragma once
+
+//---- Define assertion handler. Defaults to calling assert().
+//#define IM_ASSERT(_EXPR)  MyAssert(_EXPR)
+//#define IM_ASSERT(_EXPR)  ((void)(_EXPR))     // Disable asserts
+
+//---- Define attributes of all API symbols declarations, e.g. for DLL under Windows 
+// Using dear imgui via a shared library is not recommended, because of function call overhead and because we don't guarantee backward nor forward ABI compatibility.
+//#define IMGUI_API __declspec( dllexport )
+//#define IMGUI_API __declspec( dllimport )
+
+//---- Don't define obsolete functions/enums names. Consider enabling from time to time after updating to avoid using soon-to-be obsolete function/names.
+//#define IMGUI_DISABLE_OBSOLETE_FUNCTIONS
+
+//---- Don't implement demo windows functionality (ShowDemoWindow()/ShowStyleEditor()/ShowUserGuide() methods will be empty)
+// It is very strongly recommended to NOT disable the demo windows during development. Please read the comments in imgui_demo.cpp.
+#define IMGUI_DISABLE_DEMO_WINDOWS
+#define IMGUI_DISABLE_METRICS_WINDOW
+
+//---- Don't implement some functions to reduce linkage requirements.
+//#define IMGUI_DISABLE_WIN32_DEFAULT_CLIPBOARD_FUNCTIONS   // [Win32] Don't implement default clipboard handler. Won't use and link with OpenClipboard/GetClipboardData/CloseClipboard etc.
+#define IMGUI_DISABLE_WIN32_DEFAULT_IME_FUNCTIONS         // [Win32] Don't implement default IME handler. Won't use and link with ImmGetContext/ImmSetCompositionWindow.
+//#define IMGUI_DISABLE_WIN32_FUNCTIONS                     // [Win32] Won't use and link with any Win32 function (clipboard, ime).
+//#define IMGUI_DISABLE_OSX_FUNCTIONS                       // [OSX] Won't use and link with any OSX function (clipboard).
+//#define IMGUI_DISABLE_FORMAT_STRING_FUNCTIONS             // Don't implement ImFormatString/ImFormatStringV so you can implement them yourself if you don't want to link with vsnprintf.
+//#define IMGUI_DISABLE_MATH_FUNCTIONS                      // Don't implement ImFabs/ImSqrt/ImPow/ImFmod/ImCos/ImSin/ImAcos/ImAtan2 wrapper so you can implement them yourself. Declare your prototypes in imconfig.h.
+//#define IMGUI_DISABLE_DEFAULT_ALLOCATORS                  // Don't implement default allocators calling malloc()/free() to avoid linking with them. You will need to call ImGui::SetAllocatorFunctions().
+
+//---- Include imgui_user.h at the end of imgui.h as a convenience
+//#define IMGUI_INCLUDE_IMGUI_USER_H
+
+//---- Pack colors to BGRA8 instead of RGBA8 (to avoid converting from one to another)
+//#define IMGUI_USE_BGRA_PACKED_COLOR
+
+//---- Avoid multiple STB libraries implementations, or redefine path/filenames to prioritize another version
+// By default the embedded implementations are declared static and not available outside of imgui cpp files.
+//#define IMGUI_STB_TRUETYPE_FILENAME   "my_folder/stb_truetype.h"
+//#define IMGUI_STB_RECT_PACK_FILENAME  "my_folder/stb_rect_pack.h"
+//#define IMGUI_DISABLE_STB_TRUETYPE_IMPLEMENTATION
+//#define IMGUI_DISABLE_STB_RECT_PACK_IMPLEMENTATION
+
+//---- Define constructor and implicit cast operators to convert back<>forth between your math types and ImVec2/ImVec4.
+// This will be inlined as part of ImVec2 and ImVec4 class declarations.
+/*
+#define IM_VEC2_CLASS_EXTRA                                                 \
+        ImVec2(const MyVec2& f) { x = f.x; y = f.y; }                       \
+        operator MyVec2() const { return MyVec2(x,y); }
+
+#define IM_VEC4_CLASS_EXTRA                                                 \
+        ImVec4(const MyVec4& f) { x = f.x; y = f.y; z = f.z; w = f.w; }     \
+        operator MyVec4() const { return MyVec4(x,y,z,w); }
+*/
+
+//---- Using 32-bits vertex indices (default is 16-bits) is one way to allow large meshes with more than 64K vertices. 
+// Your renderer back-end will need to support it (most example renderer back-ends support both 16/32-bits indices).
+// Another way to allow large meshes while keeping 16-bits indices is to handle ImDrawCmd::VtxOffset in your renderer. 
+// Read about ImGuiBackendFlags_RendererHasVtxOffset for details.
+//#define ImDrawIdx unsigned int
+
+//---- Override ImDrawCallback signature (will need to modify renderer back-ends accordingly)
+//struct ImDrawList;
+//struct ImDrawCmd;
+//typedef void (*MyImDrawCallback)(const ImDrawList* draw_list, const ImDrawCmd* cmd, void* my_renderer_user_data);
+//#define ImDrawCallback MyImDrawCallback
+
+//---- Debug Tools
+// Use 'Metrics->Tools->Item Picker' to pick widgets with the mouse and break into them for easy debugging.
+//#define IM_DEBUG_BREAK  IM_ASSERT(0)
+//#define IM_DEBUG_BREAK  __debugbreak()
+// Have the Item Picker break in the ItemAdd() function instead of ItemHoverable() - which is earlier in the code, will catch a few extra items, allow picking items other than Hovered one.
+// This adds a small runtime cost which is why it is not enabled by default.
+//#define IMGUI_DEBUG_TOOL_ITEM_PICKER_EX
+
+//---- Tip: You can add extra functions within the ImGui:: namespace, here or in your own headers files.
+/*
+namespace ImGui
+{
+    void MyFunction(const char* name, const MyMatrix44& v);
+}
+*/
+
+#define IMGUI_INCLUDE_IMGUI_USER_H
+
+#define IMGUI_IMPL_OPENGL_LOADER_GLEW

ImGui/imgui_user.h

@@ -0,0 +1,5 @@
+namespace ImGui
+{
+    IMGUI_API bool ColoredInputTextMultiline(const char* label, char* buf, size_t buf_size, const ImVec2& size = ImVec2(0, 0), ImGuiInputTextFlags flags = 0, ImGuiInputTextCallback callback = NULL, void* user_data = NULL);
+    IMGUI_API bool ColoredInputTextEx(const char* label, const char* hint, char* buf, int buf_size, const ImVec2& size_arg, ImGuiInputTextFlags flags, ImGuiInputTextCallback callback = NULL, void* user_data = NULL);
+}

ImGui/impls/imgui_impl_opengl3.cpp

@@ -0,0 +1,634 @@
+// dear imgui: Renderer for modern OpenGL with shaders / programmatic pipeline
+// - Desktop GL: 3.x 4.x
+// - Embedded GL: ES 2.0 (WebGL 1.0), ES 3.0 (WebGL 2.0)
+// This needs to be used along with a Platform Binding (e.g. GLFW, SDL, Win32, custom..)
+
+// Implemented features:
+//  [X] Renderer: User texture binding. Use 'GLuint' OpenGL texture identifier as void*/ImTextureID. Read the FAQ about ImTextureID in imgui.cpp.
+//  [x] Renderer: Desktop GL only: Support for large meshes (64k+ vertices) with 16-bits indices.
+
+// You can copy and use unmodified imgui_impl_* files in your project. See main.cpp for an example of using this.
+// If you are new to dear imgui, read examples/README.txt and read the documentation at the top of imgui.cpp.
+// https://github.com/ocornut/imgui
+
+// CHANGELOG
+// (minor and older changes stripped away, please see git history for details)
+//  2019-05-29: OpenGL: Desktop GL only: Added support for large mesh (64K+ vertices), enable ImGuiBackendFlags_RendererHasVtxOffset flag.
+//  2019-04-30: OpenGL: Added support for special ImDrawCallback_ResetRenderState callback to reset render state.
+//  2019-03-29: OpenGL: Not calling glBindBuffer more than necessary in the render loop.
+//  2019-03-15: OpenGL: Added a dummy GL call + comments in ImGui_ImplOpenGL3_Init() to detect uninitialized GL function loaders early.
+//  2019-03-03: OpenGL: Fix support for ES 2.0 (WebGL 1.0).
+//  2019-02-20: OpenGL: Fix for OSX not supporting OpenGL 4.5, we don't try to read GL_CLIP_ORIGIN even if defined by the headers/loader.
+//  2019-02-11: OpenGL: Projecting clipping rectangles correctly using draw_data->FramebufferScale to allow multi-viewports for retina display.
+//  2019-02-01: OpenGL: Using GLSL 410 shaders for any version over 410 (e.g. 430, 450).
+//  2018-11-30: Misc: Setting up io.BackendRendererName so it can be displayed in the About Window.
+//  2018-11-13: OpenGL: Support for GL 4.5's glClipControl(GL_UPPER_LEFT) / GL_CLIP_ORIGIN.
+//  2018-08-29: OpenGL: Added support for more OpenGL loaders: glew and glad, with comments indicative that any loader can be used.
+//  2018-08-09: OpenGL: Default to OpenGL ES 3 on iOS and Android. GLSL version default to "#version 300 ES".
+//  2018-07-30: OpenGL: Support for GLSL 300 ES and 410 core. Fixes for Emscripten compilation.
+//  2018-07-10: OpenGL: Support for more GLSL versions (based on the GLSL version string). Added error output when shaders fail to compile/link.
+//  2018-06-08: Misc: Extracted imgui_impl_opengl3.cpp/.h away from the old combined GLFW/SDL+OpenGL3 examples.
+//  2018-06-08: OpenGL: Use draw_data->DisplayPos and draw_data->DisplaySize to setup projection matrix and clipping rectangle.
+//  2018-05-25: OpenGL: Removed unnecessary backup/restore of GL_ELEMENT_ARRAY_BUFFER_BINDING since this is part of the VAO state.
+//  2018-05-14: OpenGL: Making the call to glBindSampler() optional so 3.2 context won't fail if the function is a NULL pointer.
+//  2018-03-06: OpenGL: Added const char* glsl_version parameter to ImGui_ImplOpenGL3_Init() so user can override the GLSL version e.g. "#version 150".
+//  2018-02-23: OpenGL: Create the VAO in the render function so the setup can more easily be used with multiple shared GL context.
+//  2018-02-16: Misc: Obsoleted the io.RenderDrawListsFn callback and exposed ImGui_ImplSdlGL3_RenderDrawData() in the .h file so you can call it yourself.
+//  2018-01-07: OpenGL: Changed GLSL shader version from 330 to 150.
+//  2017-09-01: OpenGL: Save and restore current bound sampler. Save and restore current polygon mode.
+//  2017-05-01: OpenGL: Fixed save and restore of current blend func state.
+//  2017-05-01: OpenGL: Fixed save and restore of current GL_ACTIVE_TEXTURE.
+//  2016-09-05: OpenGL: Fixed save and restore of current scissor rectangle.
+//  2016-07-29: OpenGL: Explicitly setting GL_UNPACK_ROW_LENGTH to reduce issues because SDL changes it. (#752)
+
+//----------------------------------------
+// OpenGL    GLSL      GLSL
+// version   version   string
+//----------------------------------------
+//  2.0       110       "#version 110"
+//  2.1       120       "#version 120"
+//  3.0       130       "#version 130"
+//  3.1       140       "#version 140"
+//  3.2       150       "#version 150"
+//  3.3       330       "#version 330 core"
+//  4.0       400       "#version 400 core"
+//  4.1       410       "#version 410 core"
+//  4.2       420       "#version 410 core"
+//  4.3       430       "#version 430 core"
+//  ES 2.0    100       "#version 100"      = WebGL 1.0
+//  ES 3.0    300       "#version 300 es"   = WebGL 2.0
+//----------------------------------------
+
+#if defined(_MSC_VER) && !defined(_CRT_SECURE_NO_WARNINGS)
+#define _CRT_SECURE_NO_WARNINGS
+#endif
+
+#include "../imgui.h"
+#include "imgui_impl_opengl3.h"
+#include <stdio.h>
+#if defined(_MSC_VER) && _MSC_VER <= 1500 // MSVC 2008 or earlier
+#include <stddef.h>     // intptr_t
+#else
+#include <stdint.h>     // intptr_t
+#endif
+#if defined(__APPLE__)
+#include "TargetConditionals.h"
+#endif
+
+// Auto-detect GL version
+#if !defined(IMGUI_IMPL_OPENGL_ES2) && !defined(IMGUI_IMPL_OPENGL_ES3)
+#if (defined(__APPLE__) && (TARGET_OS_IOS || TARGET_OS_TV)) || (defined(__ANDROID__))
+#define IMGUI_IMPL_OPENGL_ES3       // iOS, Android  -> GL ES 3, "#version 300 es"
+#elif defined(__EMSCRIPTEN__)
+#define IMGUI_IMPL_OPENGL_ES2       // Emscripten    -> GL ES 2, "#version 100"
+#endif
+#endif
+
+#if defined(IMGUI_IMPL_OPENGL_ES2)
+#include <GLES2/gl2.h>
+#elif defined(IMGUI_IMPL_OPENGL_ES3)
+#if (defined(__APPLE__) && (TARGET_OS_IOS || TARGET_OS_TV))
+#include <OpenGLES/ES3/gl.h>  // Use GL ES 3
+#else
+#include <GLES3/gl3.h>  // Use GL ES 3
+#endif
+#else
+// About Desktop OpenGL function loaders:
+//  Modern desktop OpenGL doesn't have a standard portable header file to load OpenGL function pointers.
+//  Helper libraries are often used for this purpose! Here we are supporting a few common ones (gl3w, glew, glad).
+//  You may use another loader/header of your choice (glext, glLoadGen, etc.), or chose to manually implement your own.
+#if defined(IMGUI_IMPL_OPENGL_LOADER_GL3W)
+#include <GL/gl3w.h>    // Needs to be initialized with gl3wInit() in user's code
+#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLEW)
+#include <GL/glew.h>    // Needs to be initialized with glewInit() in user's code
+#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLAD)
+#include <glad/glad.h>  // Needs to be initialized with gladLoadGL() in user's code
+#else
+#include IMGUI_IMPL_OPENGL_LOADER_CUSTOM
+#endif
+#endif
+
+// Desktop GL has glDrawElementsBaseVertex() which GL ES and WebGL don't have.
+#if defined(IMGUI_IMPL_OPENGL_ES2) || defined(IMGUI_IMPL_OPENGL_ES3)
+#define IMGUI_IMPL_OPENGL_HAS_DRAW_WITH_BASE_VERTEX     0
+#else
+#define IMGUI_IMPL_OPENGL_HAS_DRAW_WITH_BASE_VERTEX     1
+#endif
+
+// OpenGL Data
+static char         g_GlslVersionString[32] = "";
+static GLuint       g_FontTexture = 0;
+static GLuint       g_ShaderHandle = 0, g_VertHandle = 0, g_FragHandle = 0;
+static int          g_AttribLocationTex = 0, g_AttribLocationProjMtx = 0;                                // Uniforms location
+static int          g_AttribLocationVtxPos = 0, g_AttribLocationVtxUV = 0, g_AttribLocationVtxColor = 0; // Vertex attributes location
+static unsigned int g_VboHandle = 0, g_ElementsHandle = 0;
+
+// Functions
+bool    ImGui_ImplOpenGL3_Init(const char* glsl_version)
+{
+    // Setup back-end capabilities flags
+    ImGuiIO& io = ImGui::GetIO();
+    io.BackendRendererName = "imgui_impl_opengl3";
+#if IMGUI_IMPL_OPENGL_HAS_DRAW_WITH_BASE_VERTEX
+    io.BackendFlags |= ImGuiBackendFlags_RendererHasVtxOffset;  // We can honor the ImDrawCmd::VtxOffset field, allowing for large meshes.
+#endif
+
+    // Store GLSL version string so we can refer to it later in case we recreate shaders. Note: GLSL version is NOT the same as GL version. Leave this to NULL if unsure.
+#if defined(IMGUI_IMPL_OPENGL_ES2)
+    if (glsl_version == NULL)
+        glsl_version = "#version 100";
+#elif defined(IMGUI_IMPL_OPENGL_ES3)
+    if (glsl_version == NULL)
+        glsl_version = "#version 300 es";
+#else
+    if (glsl_version == NULL)
+        glsl_version = "#version 130";
+#endif
+    IM_ASSERT((int)strlen(glsl_version) + 2 < IM_ARRAYSIZE(g_GlslVersionString));
+    strcpy(g_GlslVersionString, glsl_version);
+    strcat(g_GlslVersionString, "\n");
+
+    // Make a dummy GL call (we don't actually need the result)
+    // IF YOU GET A CRASH HERE: it probably means that you haven't initialized the OpenGL function loader used by this code.
+    // Desktop OpenGL 3/4 need a function loader. See the IMGUI_IMPL_OPENGL_LOADER_xxx explanation above.
+    GLint current_texture;
+    glGetIntegerv(GL_TEXTURE_BINDING_2D, &current_texture);
+
+    return true;
+}
+
+void    ImGui_ImplOpenGL3_Shutdown()
+{
+    ImGui_ImplOpenGL3_DestroyDeviceObjects();
+}
+
+bool    ImGui_ImplOpenGL3_NewFrame()
+{
+    if (!g_FontTexture)
+        return ImGui_ImplOpenGL3_CreateDeviceObjects();
+
+    return true;
+}
+
+static void ImGui_ImplOpenGL3_SetupRenderState(ImDrawData* draw_data, int fb_width, int fb_height, GLuint vertex_array_object)
+{
+    // Setup render state: alpha-blending enabled, no face culling, no depth testing, scissor enabled, polygon fill
+    glEnable(GL_BLEND);
+    glBlendEquation(GL_FUNC_ADD);
+    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+    glDisable(GL_CULL_FACE);
+    glDisable(GL_DEPTH_TEST);
+    glEnable(GL_SCISSOR_TEST);
+#ifdef GL_POLYGON_MODE
+    glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
+#endif
+
+    // Setup viewport, orthographic projection matrix
+    // Our visible imgui space lies from draw_data->DisplayPos (top left) to draw_data->DisplayPos+data_data->DisplaySize (bottom right). DisplayPos is (0,0) for single viewport apps.
+    glViewport(0, 0, (GLsizei)fb_width, (GLsizei)fb_height);
+    float L = draw_data->DisplayPos.x;
+    float R = draw_data->DisplayPos.x + draw_data->DisplaySize.x;
+    float T = draw_data->DisplayPos.y;
+    float B = draw_data->DisplayPos.y + draw_data->DisplaySize.y;
+    const float ortho_projection[4][4] =
+    {
+        { 2.0f/(R-L),   0.0f,         0.0f,   0.0f },
+        { 0.0f,         2.0f/(T-B),   0.0f,   0.0f },
+        { 0.0f,         0.0f,        -1.0f,   0.0f },
+        { (R+L)/(L-R),  (T+B)/(B-T),  0.0f,   1.0f },
+    };
+    glUseProgram(g_ShaderHandle);
+    glUniform1i(g_AttribLocationTex, 0);
+    glUniformMatrix4fv(g_AttribLocationProjMtx, 1, GL_FALSE, &ortho_projection[0][0]);
+#ifdef GL_SAMPLER_BINDING
+    glBindSampler(0, 0); // We use combined texture/sampler state. Applications using GL 3.3 may set that otherwise.
+#endif
+
+    (void)vertex_array_object;
+#ifndef IMGUI_IMPL_OPENGL_ES2
+    glBindVertexArray(vertex_array_object);
+#endif
+
+    // Bind vertex/index buffers and setup attributes for ImDrawVert
+    glBindBuffer(GL_ARRAY_BUFFER, g_VboHandle);
+    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_ElementsHandle);
+    glEnableVertexAttribArray(g_AttribLocationVtxPos);
+    glEnableVertexAttribArray(g_AttribLocationVtxUV);
+    glEnableVertexAttribArray(g_AttribLocationVtxColor);
+    glVertexAttribPointer(g_AttribLocationVtxPos,   2, GL_FLOAT,         GL_FALSE, sizeof(ImDrawVert), (GLvoid*)IM_OFFSETOF(ImDrawVert, pos));
+    glVertexAttribPointer(g_AttribLocationVtxUV,    2, GL_FLOAT,         GL_FALSE, sizeof(ImDrawVert), (GLvoid*)IM_OFFSETOF(ImDrawVert, uv));
+    glVertexAttribPointer(g_AttribLocationVtxColor, 4, GL_UNSIGNED_BYTE, GL_TRUE,  sizeof(ImDrawVert), (GLvoid*)IM_OFFSETOF(ImDrawVert, col));
+}
+
+// OpenGL3 Render function.
+// (this used to be set in io.RenderDrawListsFn and called by ImGui::Render(), but you can now call this directly from your main loop)
+// Note that this implementation is little overcomplicated because we are saving/setting up/restoring every OpenGL state explicitly, in order to be able to run within any OpenGL engine that doesn't do so.
+void    ImGui_ImplOpenGL3_RenderDrawData(ImDrawData* draw_data)
+{
+    // Avoid rendering when minimized, scale coordinates for retina displays (screen coordinates != framebuffer coordinates)
+    int fb_width = (int)(draw_data->DisplaySize.x * draw_data->FramebufferScale.x);
+    int fb_height = (int)(draw_data->DisplaySize.y * draw_data->FramebufferScale.y);
+    if (fb_width <= 0 || fb_height <= 0)
+        return;
+
+    // Backup GL state
+    GLenum last_active_texture; glGetIntegerv(GL_ACTIVE_TEXTURE, (GLint*)&last_active_texture);
+    glActiveTexture(GL_TEXTURE0);
+    GLint last_program; glGetIntegerv(GL_CURRENT_PROGRAM, &last_program);
+    GLint last_texture; glGetIntegerv(GL_TEXTURE_BINDING_2D, &last_texture);
+#ifdef GL_SAMPLER_BINDING
+    GLint last_sampler; glGetIntegerv(GL_SAMPLER_BINDING, &last_sampler);
+#endif
+    GLint last_array_buffer; glGetIntegerv(GL_ARRAY_BUFFER_BINDING, &last_array_buffer);
+#ifndef IMGUI_IMPL_OPENGL_ES2
+    GLint last_vertex_array_object; glGetIntegerv(GL_VERTEX_ARRAY_BINDING, &last_vertex_array_object);
+#endif
+#ifdef GL_POLYGON_MODE
+    GLint last_polygon_mode[2]; glGetIntegerv(GL_POLYGON_MODE, last_polygon_mode);
+#endif
+    GLint last_viewport[4]; glGetIntegerv(GL_VIEWPORT, last_viewport);
+    GLint last_scissor_box[4]; glGetIntegerv(GL_SCISSOR_BOX, last_scissor_box);
+    GLenum last_blend_src_rgb; glGetIntegerv(GL_BLEND_SRC_RGB, (GLint*)&last_blend_src_rgb);
+    GLenum last_blend_dst_rgb; glGetIntegerv(GL_BLEND_DST_RGB, (GLint*)&last_blend_dst_rgb);
+    GLenum last_blend_src_alpha; glGetIntegerv(GL_BLEND_SRC_ALPHA, (GLint*)&last_blend_src_alpha);
+    GLenum last_blend_dst_alpha; glGetIntegerv(GL_BLEND_DST_ALPHA, (GLint*)&last_blend_dst_alpha);
+    GLenum last_blend_equation_rgb; glGetIntegerv(GL_BLEND_EQUATION_RGB, (GLint*)&last_blend_equation_rgb);
+    GLenum last_blend_equation_alpha; glGetIntegerv(GL_BLEND_EQUATION_ALPHA, (GLint*)&last_blend_equation_alpha);
+    GLboolean last_enable_blend = glIsEnabled(GL_BLEND);
+    GLboolean last_enable_cull_face = glIsEnabled(GL_CULL_FACE);
+    GLboolean last_enable_depth_test = glIsEnabled(GL_DEPTH_TEST);
+    GLboolean last_enable_scissor_test = glIsEnabled(GL_SCISSOR_TEST);
+    bool clip_origin_lower_left = true;
+#if defined(GL_CLIP_ORIGIN) && !defined(__APPLE__)
+    GLenum last_clip_origin = 0; glGetIntegerv(GL_CLIP_ORIGIN, (GLint*)&last_clip_origin); // Support for GL 4.5's glClipControl(GL_UPPER_LEFT)
+    if (last_clip_origin == GL_UPPER_LEFT)
+        clip_origin_lower_left = false;
+#endif
+
+    // Setup desired GL state
+    // Recreate the VAO every time (this is to easily allow multiple GL contexts to be rendered to. VAO are not shared among GL contexts)
+    // The renderer would actually work without any VAO bound, but then our VertexAttrib calls would overwrite the default one currently bound.
+    GLuint vertex_array_object = 0;
+#ifndef IMGUI_IMPL_OPENGL_ES2
+    glGenVertexArrays(1, &vertex_array_object);
+#endif
+    ImGui_ImplOpenGL3_SetupRenderState(draw_data, fb_width, fb_height, vertex_array_object);
+
+    // Will project scissor/clipping rectangles into framebuffer space
+    ImVec2 clip_off = draw_data->DisplayPos;         // (0,0) unless using multi-viewports
+    ImVec2 clip_scale = draw_data->FramebufferScale; // (1,1) unless using retina display which are often (2,2)
+
+    // Render command lists
+    for (int n = 0; n < draw_data->CmdListsCount; n++)
+    {
+        const ImDrawList* cmd_list = draw_data->CmdLists[n];
+
+        // Upload vertex/index buffers
+        glBufferData(GL_ARRAY_BUFFER, (GLsizeiptr)cmd_list->VtxBuffer.Size * sizeof(ImDrawVert), (const GLvoid*)cmd_list->VtxBuffer.Data, GL_STREAM_DRAW);
+        glBufferData(GL_ELEMENT_ARRAY_BUFFER, (GLsizeiptr)cmd_list->IdxBuffer.Size * sizeof(ImDrawIdx), (const GLvoid*)cmd_list->IdxBuffer.Data, GL_STREAM_DRAW);
+
+        for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.Size; cmd_i++)
+        {
+            const ImDrawCmd* pcmd = &cmd_list->CmdBuffer[cmd_i];
+            if (pcmd->UserCallback != NULL)
+            {
+                // User callback, registered via ImDrawList::AddCallback()
+                // (ImDrawCallback_ResetRenderState is a special callback value used by the user to request the renderer to reset render state.)
+                if (pcmd->UserCallback == ImDrawCallback_ResetRenderState)
+                    ImGui_ImplOpenGL3_SetupRenderState(draw_data, fb_width, fb_height, vertex_array_object);
+                else
+                    pcmd->UserCallback(cmd_list, pcmd);
+            }
+            else
+            {
+                // Project scissor/clipping rectangles into framebuffer space
+                ImVec4 clip_rect;
+                clip_rect.x = (pcmd->ClipRect.x - clip_off.x) * clip_scale.x;
+                clip_rect.y = (pcmd->ClipRect.y - clip_off.y) * clip_scale.y;
+                clip_rect.z = (pcmd->ClipRect.z - clip_off.x) * clip_scale.x;
+                clip_rect.w = (pcmd->ClipRect.w - clip_off.y) * clip_scale.y;
+
+                if (clip_rect.x < fb_width && clip_rect.y < fb_height && clip_rect.z >= 0.0f && clip_rect.w >= 0.0f)
+                {
+                    // Apply scissor/clipping rectangle
+                    if (clip_origin_lower_left)
+                        glScissor((int)clip_rect.x, (int)(fb_height - clip_rect.w), (int)(clip_rect.z - clip_rect.x), (int)(clip_rect.w - clip_rect.y));
+                    else
+                        glScissor((int)clip_rect.x, (int)clip_rect.y, (int)clip_rect.z, (int)clip_rect.w); // Support for GL 4.5 rarely used glClipControl(GL_UPPER_LEFT)
+
+                    // Bind texture, Draw
+                    glBindTexture(GL_TEXTURE_2D, (GLuint)(intptr_t)pcmd->TextureId);
+#if IMGUI_IMPL_OPENGL_HAS_DRAW_WITH_BASE_VERTEX
+                    glDrawElementsBaseVertex(GL_TRIANGLES, (GLsizei)pcmd->ElemCount, sizeof(ImDrawIdx) == 2 ? GL_UNSIGNED_SHORT : GL_UNSIGNED_INT, (void*)(intptr_t)(pcmd->IdxOffset * sizeof(ImDrawIdx)), (GLint)pcmd->VtxOffset);
+#else
+                    glDrawElements(GL_TRIANGLES, (GLsizei)pcmd->ElemCount, sizeof(ImDrawIdx) == 2 ? GL_UNSIGNED_SHORT : GL_UNSIGNED_INT, (void*)(intptr_t)(pcmd->IdxOffset * sizeof(ImDrawIdx)));
+#endif
+                }
+            }
+        }
+    }
+
+    // Destroy the temporary VAO
+#ifndef IMGUI_IMPL_OPENGL_ES2
+    glDeleteVertexArrays(1, &vertex_array_object);
+#endif
+
+    // Restore modified GL state
+    glUseProgram(last_program);
+    glBindTexture(GL_TEXTURE_2D, last_texture);
+#ifdef GL_SAMPLER_BINDING
+    glBindSampler(0, last_sampler);
+#endif
+    glActiveTexture(last_active_texture);
+#ifndef IMGUI_IMPL_OPENGL_ES2
+    glBindVertexArray(last_vertex_array_object);
+#endif
+    glBindBuffer(GL_ARRAY_BUFFER, last_array_buffer);
+    glBlendEquationSeparate(last_blend_equation_rgb, last_blend_equation_alpha);
+    glBlendFuncSeparate(last_blend_src_rgb, last_blend_dst_rgb, last_blend_src_alpha, last_blend_dst_alpha);
+    if (last_enable_blend) glEnable(GL_BLEND); else glDisable(GL_BLEND);
+    if (last_enable_cull_face) glEnable(GL_CULL_FACE); else glDisable(GL_CULL_FACE);
+    if (last_enable_depth_test) glEnable(GL_DEPTH_TEST); else glDisable(GL_DEPTH_TEST);
+    if (last_enable_scissor_test) glEnable(GL_SCISSOR_TEST); else glDisable(GL_SCISSOR_TEST);
+#ifdef GL_POLYGON_MODE
+    glPolygonMode(GL_FRONT_AND_BACK, (GLenum)last_polygon_mode[0]);
+#endif
+    glViewport(last_viewport[0], last_viewport[1], (GLsizei)last_viewport[2], (GLsizei)last_viewport[3]);
+    glScissor(last_scissor_box[0], last_scissor_box[1], (GLsizei)last_scissor_box[2], (GLsizei)last_scissor_box[3]);
+}
+
+bool ImGui_ImplOpenGL3_CreateFontsTexture()
+{
+    // Build texture atlas
+    ImGuiIO& io = ImGui::GetIO();
+    unsigned char* pixels;
+    int width, height;
+    io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height);   // Load as RGBA 32-bits (75% of the memory is wasted, but default font is so small) because it is more likely to be compatible with user's existing shaders. If your ImTextureId represent a higher-level concept than just a GL texture id, consider calling GetTexDataAsAlpha8() instead to save on GPU memory.
+
+    // Upload texture to graphics system
+    GLint last_texture;
+    glGetIntegerv(GL_TEXTURE_BINDING_2D, &last_texture);
+    glGenTextures(1, &g_FontTexture);
+    glBindTexture(GL_TEXTURE_2D, g_FontTexture);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+#ifdef GL_UNPACK_ROW_LENGTH
+    glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
+#endif
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
+
+    // Store our identifier
+    io.Fonts->TexID = (ImTextureID)(intptr_t)g_FontTexture;
+
+    // Restore state
+    glBindTexture(GL_TEXTURE_2D, last_texture);
+
+    return true;
+}
+
+void ImGui_ImplOpenGL3_DestroyFontsTexture()
+{
+    if (g_FontTexture)
+    {
+        ImGuiIO& io = ImGui::GetIO();
+        glDeleteTextures(1, &g_FontTexture);
+        io.Fonts->TexID = 0;
+        g_FontTexture = 0;
+    }
+}
+
+// If you get an error please report on github. You may try different GL context version or GLSL version. See GL<>GLSL version table at the top of this file.
+static bool CheckShader(GLuint handle, const char* desc)
+{
+    GLint status = 0, log_length = 0;
+    glGetShaderiv(handle, GL_COMPILE_STATUS, &status);
+    glGetShaderiv(handle, GL_INFO_LOG_LENGTH, &log_length);
+    if ((GLboolean)status == GL_FALSE)
+        fprintf(stderr, "ERROR: ImGui_ImplOpenGL3_CreateDeviceObjects: failed to compile %s!\n", desc);
+    if (log_length > 1)
+    {
+        ImVector<char> buf;
+        buf.resize((int)(log_length + 1));
+        glGetShaderInfoLog(handle, log_length, NULL, (GLchar*)buf.begin());
+        fprintf(stderr, "%s\n", buf.begin());
+    }
+    return (GLboolean)status == GL_TRUE;
+}
+
+// If you get an error please report on GitHub. You may try different GL context version or GLSL version.
+static bool CheckProgram(GLuint handle, const char* desc)
+{
+    GLint status = 0, log_length = 0;
+    glGetProgramiv(handle, GL_LINK_STATUS, &status);
+    glGetProgramiv(handle, GL_INFO_LOG_LENGTH, &log_length);
+    if ((GLboolean)status == GL_FALSE)
+        fprintf(stderr, "ERROR: ImGui_ImplOpenGL3_CreateDeviceObjects: failed to link %s! (with GLSL '%s')\n", desc, g_GlslVersionString);
+    if (log_length > 1)
+    {
+        ImVector<char> buf;
+        buf.resize((int)(log_length + 1));
+        glGetProgramInfoLog(handle, log_length, NULL, (GLchar*)buf.begin());
+        fprintf(stderr, "%s\n", buf.begin());
+    }
+    return (GLboolean)status == GL_TRUE;
+}
+
+bool    ImGui_ImplOpenGL3_CreateDeviceObjects()
+{
+    // Backup GL state
+    GLint last_texture, last_array_buffer;
+    glGetIntegerv(GL_TEXTURE_BINDING_2D, &last_texture);
+    glGetIntegerv(GL_ARRAY_BUFFER_BINDING, &last_array_buffer);
+#ifndef IMGUI_IMPL_OPENGL_ES2
+    GLint last_vertex_array;
+    glGetIntegerv(GL_VERTEX_ARRAY_BINDING, &last_vertex_array);
+#endif
+
+    // Parse GLSL version string
+    int glsl_version = 130;
+    sscanf(g_GlslVersionString, "#version %d", &glsl_version);
+
+    const GLchar* vertex_shader_glsl_120 =
+        "uniform mat4 ProjMtx;\n"
+        "attribute vec2 Position;\n"
+        "attribute vec2 UV;\n"
+        "attribute vec4 Color;\n"
+        "varying vec2 Frag_UV;\n"
+        "varying vec4 Frag_Color;\n"
+        "void main()\n"
+        "{\n"
+        "    Frag_UV = UV;\n"
+        "    Frag_Color = Color;\n"
+        "    gl_Position = ProjMtx * vec4(Position.xy,0,1);\n"
+        "}\n";
+
+    const GLchar* vertex_shader_glsl_130 =
+        "uniform mat4 ProjMtx;\n"
+        "in vec2 Position;\n"
+        "in vec2 UV;\n"
+        "in vec4 Color;\n"
+        "out vec2 Frag_UV;\n"
+        "out vec4 Frag_Color;\n"
+        "void main()\n"
+        "{\n"
+        "    Frag_UV = UV;\n"
+        "    Frag_Color = Color;\n"
+        "    gl_Position = ProjMtx * vec4(Position.xy,0,1);\n"
+        "}\n";
+
+    const GLchar* vertex_shader_glsl_300_es =
+        "precision mediump float;\n"
+        "layout (location = 0) in vec2 Position;\n"
+        "layout (location = 1) in vec2 UV;\n"
+        "layout (location = 2) in vec4 Color;\n"
+        "uniform mat4 ProjMtx;\n"
+        "out vec2 Frag_UV;\n"
+        "out vec4 Frag_Color;\n"
+        "void main()\n"
+        "{\n"
+        "    Frag_UV = UV;\n"
+        "    Frag_Color = Color;\n"
+        "    gl_Position = ProjMtx * vec4(Position.xy,0,1);\n"
+        "}\n";
+
+    const GLchar* vertex_shader_glsl_410_core =
+        "layout (location = 0) in vec2 Position;\n"
+        "layout (location = 1) in vec2 UV;\n"
+        "layout (location = 2) in vec4 Color;\n"
+        "uniform mat4 ProjMtx;\n"
+        "out vec2 Frag_UV;\n"
+        "out vec4 Frag_Color;\n"
+        "void main()\n"
+        "{\n"
+        "    Frag_UV = UV;\n"
+        "    Frag_Color = Color;\n"
+        "    gl_Position = ProjMtx * vec4(Position.xy,0,1);\n"
+        "}\n";
+
+    const GLchar* fragment_shader_glsl_120 =
+        "#ifdef GL_ES\n"
+        "    precision mediump float;\n"
+        "#endif\n"
+        "uniform sampler2D Texture;\n"
+        "varying vec2 Frag_UV;\n"
+        "varying vec4 Frag_Color;\n"
+        "void main()\n"
+        "{\n"
+        "    gl_FragColor = Frag_Color * texture2D(Texture, Frag_UV.st);\n"
+        "}\n";
+
+    const GLchar* fragment_shader_glsl_130 =
+        "uniform sampler2D Texture;\n"
+        "in vec2 Frag_UV;\n"
+        "in vec4 Frag_Color;\n"
+        "out vec4 Out_Color;\n"
+        "void main()\n"
+        "{\n"
+        "    Out_Color = Frag_Color * texture(Texture, Frag_UV.st);\n"
+        "}\n";
+
+    const GLchar* fragment_shader_glsl_300_es =
+        "precision mediump float;\n"
+        "uniform sampler2D Texture;\n"
+        "in vec2 Frag_UV;\n"
+        "in vec4 Frag_Color;\n"
+        "layout (location = 0) out vec4 Out_Color;\n"
+        "void main()\n"
+        "{\n"
+        "    Out_Color = Frag_Color * texture(Texture, Frag_UV.st);\n"
+        "}\n";
+
+    const GLchar* fragment_shader_glsl_410_core =
+        "in vec2 Frag_UV;\n"
+        "in vec4 Frag_Color;\n"
+        "uniform sampler2D Texture;\n"
+        "layout (location = 0) out vec4 Out_Color;\n"
+        "void main()\n"
+        "{\n"
+        "    Out_Color = Frag_Color * texture(Texture, Frag_UV.st);\n"
+        "}\n";
+
+    // Select shaders matching our GLSL versions
+    const GLchar* vertex_shader = NULL;
+    const GLchar* fragment_shader = NULL;
+    if (glsl_version < 130)
+    {
+        vertex_shader = vertex_shader_glsl_120;
+        fragment_shader = fragment_shader_glsl_120;
+    }
+    else if (glsl_version >= 410)
+    {
+        vertex_shader = vertex_shader_glsl_410_core;
+        fragment_shader = fragment_shader_glsl_410_core;
+    }
+    else if (glsl_version == 300)
+    {
+        vertex_shader = vertex_shader_glsl_300_es;
+        fragment_shader = fragment_shader_glsl_300_es;
+    }
+    else
+    {
+        vertex_shader = vertex_shader_glsl_130;
+        fragment_shader = fragment_shader_glsl_130;
+    }
+
+    // Create shaders
+    const GLchar* vertex_shader_with_version[2] = { g_GlslVersionString, vertex_shader };
+    g_VertHandle = glCreateShader(GL_VERTEX_SHADER);
+    glShaderSource(g_VertHandle, 2, vertex_shader_with_version, NULL);
+    glCompileShader(g_VertHandle);
+    CheckShader(g_VertHandle, "vertex shader");
+
+    const GLchar* fragment_shader_with_version[2] = { g_GlslVersionString, fragment_shader };
+    g_FragHandle = glCreateShader(GL_FRAGMENT_SHADER);
+    glShaderSource(g_FragHandle, 2, fragment_shader_with_version, NULL);
+    glCompileShader(g_FragHandle);
+    CheckShader(g_FragHandle, "fragment shader");
+
+    g_ShaderHandle = glCreateProgram();
+    glAttachShader(g_ShaderHandle, g_VertHandle);
+    glAttachShader(g_ShaderHandle, g_FragHandle);
+    glLinkProgram(g_ShaderHandle);
+    CheckProgram(g_ShaderHandle, "shader program");
+
+    g_AttribLocationTex = glGetUniformLocation(g_ShaderHandle, "Texture");
+    g_AttribLocationProjMtx = glGetUniformLocation(g_ShaderHandle, "ProjMtx");
+    g_AttribLocationVtxPos = glGetAttribLocation(g_ShaderHandle, "Position");
+    g_AttribLocationVtxUV = glGetAttribLocation(g_ShaderHandle, "UV");
+    g_AttribLocationVtxColor = glGetAttribLocation(g_ShaderHandle, "Color");
+
+    // Create buffers
+    glGenBuffers(1, &g_VboHandle);
+    glGenBuffers(1, &g_ElementsHandle);
+
+    ImGui_ImplOpenGL3_CreateFontsTexture();
+
+    // Restore modified GL state
+    glBindTexture(GL_TEXTURE_2D, last_texture);
+    glBindBuffer(GL_ARRAY_BUFFER, last_array_buffer);
+#ifndef IMGUI_IMPL_OPENGL_ES2
+    glBindVertexArray(last_vertex_array);
+#endif
+
+    return true;
+}
+
+void    ImGui_ImplOpenGL3_DestroyDeviceObjects()
+{
+    if (g_VboHandle) glDeleteBuffers(1, &g_VboHandle);
+    if (g_ElementsHandle) glDeleteBuffers(1, &g_ElementsHandle);
+    g_VboHandle = g_ElementsHandle = 0;
+
+    if (g_ShaderHandle && g_VertHandle) glDetachShader(g_ShaderHandle, g_VertHandle);
+    if (g_VertHandle) glDeleteShader(g_VertHandle);
+    g_VertHandle = 0;
+
+    if (g_ShaderHandle && g_FragHandle) glDetachShader(g_ShaderHandle, g_FragHandle);
+    if (g_FragHandle) glDeleteShader(g_FragHandle);
+    g_FragHandle = 0;
+
+    if (g_ShaderHandle) glDeleteProgram(g_ShaderHandle);
+    g_ShaderHandle = 0;
+
+    ImGui_ImplOpenGL3_DestroyFontsTexture();
+}

ImGui/impls/imgui_impl_opengl3.h

@@ -0,0 +1,47 @@
+// dear imgui: Renderer for modern OpenGL with shaders / programmatic pipeline
+// - Desktop GL: 3.x 4.x
+// - Embedded GL: ES 2.0 (WebGL 1.0), ES 3.0 (WebGL 2.0)
+// This needs to be used along with a Platform Binding (e.g. GLFW, SDL, Win32, custom..)
+
+// Implemented features:
+//  [X] Renderer: User texture binding. Use 'GLuint' OpenGL texture identifier as void*/ImTextureID. Read the FAQ about ImTextureID in imgui.cpp.
+//  [x] Renderer: Desktop GL only: Support for large meshes (64k+ vertices) with 16-bits indices.
+
+// You can copy and use unmodified imgui_impl_* files in your project. See main.cpp for an example of using this.
+// If you are new to dear imgui, read examples/README.txt and read the documentation at the top of imgui.cpp.
+// https://github.com/ocornut/imgui
+
+// About Desktop OpenGL function loaders:
+//  Modern desktop OpenGL doesn't have a standard portable header file to load OpenGL function pointers.
+//  Helper libraries are often used for this purpose! Here we are supporting a few common ones (gl3w, glew, glad).
+//  You may use another loader/header of your choice (glext, glLoadGen, etc.), or chose to manually implement your own.
+
+// About GLSL version:
+//  The 'glsl_version' initialization parameter should be NULL (default) or a "#version XXX" string.
+//  On computer platform the GLSL version default to "#version 130". On OpenGL ES 3 platform it defaults to "#version 300 es"
+//  Only override if your GL version doesn't handle this GLSL version. See GLSL version table at the top of imgui_impl_opengl3.cpp.
+
+#pragma once
+
+// Specific OpenGL versions
+//#define IMGUI_IMPL_OPENGL_ES2     // Auto-detected on Emscripten
+//#define IMGUI_IMPL_OPENGL_ES3     // Auto-detected on iOS/Android
+
+// Set default OpenGL3 loader to be gl3w
+#if !defined(IMGUI_IMPL_OPENGL_LOADER_GL3W)     \
+ && !defined(IMGUI_IMPL_OPENGL_LOADER_GLEW)     \
+ && !defined(IMGUI_IMPL_OPENGL_LOADER_GLAD)     \
+ && !defined(IMGUI_IMPL_OPENGL_LOADER_CUSTOM)
+#define IMGUI_IMPL_OPENGL_LOADER_GL3W
+#endif
+
+IMGUI_IMPL_API bool     ImGui_ImplOpenGL3_Init(const char* glsl_version = NULL);
+IMGUI_IMPL_API void     ImGui_ImplOpenGL3_Shutdown();
+IMGUI_IMPL_API bool     ImGui_ImplOpenGL3_NewFrame();
+IMGUI_IMPL_API void     ImGui_ImplOpenGL3_RenderDrawData(ImDrawData* draw_data);
+
+// Called by Init/NewFrame/Shutdown
+IMGUI_IMPL_API bool     ImGui_ImplOpenGL3_CreateFontsTexture();
+IMGUI_IMPL_API void     ImGui_ImplOpenGL3_DestroyFontsTexture();
+IMGUI_IMPL_API bool     ImGui_ImplOpenGL3_CreateDeviceObjects();
+IMGUI_IMPL_API void     ImGui_ImplOpenGL3_DestroyDeviceObjects();

ImGui/impls/linux/imgui_impl_x11.cpp

@@ -0,0 +1,338 @@
+// dear imgui: Platform Binding for Windows (standard windows API for 32 and 64 bits applications)
+// This needs to be used along with a Renderer (e.g. DirectX11, OpenGL3, Vulkan..)
+
+// Implemented features:
+//  [?] Platform: Clipboard support
+//  [?] Platform: Mouse cursor shape and visibility. Disable with 'io.ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange'.
+//  [?] Platform: Keyboard arrays indexed using
+//  [?] Platform: Gamepad support. Enabled with 'io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad'.
+
+#include "imgui.h"
+#include "imgui_impl_x11.h"
+
+#include <X11/X.h>
+#include <X11/Xlib.h>
+#include <X11/keysym.h>
+#include <GL/glew.h>
+
+#include <ctime>
+
+// CHANGELOG
+// (minor and older changes stripped away, please see git history for details)
+//  2019-08-31: Initial X11 implementation
+
+// X11 Data
+static Display*             g_Display = nullptr;
+static Window               g_Window = 0;
+static uint64_t             g_Time = 0;
+static uint64_t             g_TicksPerSecond = 0;
+static ImGuiMouseCursor     g_LastMouseCursor = ImGuiMouseCursor_COUNT;
+static bool                 g_HasGamepad = false;
+static bool                 g_WantUpdateHasGamepad = true;
+
+bool GetKeyState(int keysym, char keys[32])
+{
+    int keycode = XKeysymToKeycode(g_Display, keysym);
+    return keys[keycode/8] & (1<<keycode%8);
+}
+
+bool IsKeySys(int key)
+{
+    switch(key)
+    {
+        case XK_Shift_L  : case XK_Shift_R   :
+        case XK_Control_L: case XK_Control_R :
+        case XK_Alt_L    : case XK_Alt_R     :
+        case XK_Super_L  : case XK_Super_R   :
+        case XK_Caps_Lock: case XK_Shift_Lock:
+        case XK_BackSpace: case XK_Delete    :
+        case XK_Left     : case XK_Right     :
+        case XK_Up       : case XK_Down      :
+        case XK_Prior    : case XK_Next      :
+        case XK_Home     : case XK_End       :
+        case XK_Insert   : case XK_Return    :
+            return true;
+    }
+    return false;
+}
+
+// Functions
+bool    ImGui_ImplX11_Init(void *display, void *window)
+{
+    timespec ts, tsres;
+    clock_getres(CLOCK_MONOTONIC_RAW, &tsres);
+    clock_gettime(CLOCK_MONOTONIC_RAW, &ts);
+
+    g_TicksPerSecond = 1000000000.0f / (static_cast<uint64_t>(tsres.tv_nsec) + static_cast<uint64_t>(tsres.tv_sec)*1000000000);
+    g_Time = static_cast<uint64_t>(ts.tv_nsec) + static_cast<uint64_t>(ts.tv_sec)*1000000000;
+
+    //if (!::QueryPerformanceFrequency((LARGE_INTEGER *)&g_TicksPerSecond))
+    //    return false;
+    //if (!::QueryPerformanceCounter((LARGE_INTEGER *)&g_Time))
+    //    return false;
+
+    // Setup back-end capabilities flags
+    g_Display = reinterpret_cast<Display*>(display);
+    g_Window = reinterpret_cast<Window>(window);
+    ImGuiIO& io = ImGui::GetIO();
+    io.BackendFlags |= ImGuiBackendFlags_HasMouseCursors;         // We can honor GetMouseCursor() values (optional)
+    io.BackendFlags |= ImGuiBackendFlags_HasSetMousePos;          // We can honor io.WantSetMousePos requests (optional, rarely used)
+    io.BackendPlatformName = "imgui_impl_x11";
+    io.ImeWindowHandle = nullptr;
+
+    // Keyboard mapping. ImGui will use those indices to peek into the io.KeysDown[] array that we will update during the application lifetime.
+    io.KeyMap[ImGuiKey_Tab]        = XKeysymToKeycode(g_Display, XK_Tab);
+    io.KeyMap[ImGuiKey_LeftArrow]  = XKeysymToKeycode(g_Display, XK_Left);
+    io.KeyMap[ImGuiKey_RightArrow] = XKeysymToKeycode(g_Display, XK_Right);
+    io.KeyMap[ImGuiKey_UpArrow]    = XKeysymToKeycode(g_Display, XK_Up);
+    io.KeyMap[ImGuiKey_DownArrow]  = XKeysymToKeycode(g_Display, XK_Down);
+    io.KeyMap[ImGuiKey_PageUp]     = XKeysymToKeycode(g_Display, XK_Prior);
+    io.KeyMap[ImGuiKey_PageDown]   = XKeysymToKeycode(g_Display, XK_Next);
+    io.KeyMap[ImGuiKey_Home]       = XKeysymToKeycode(g_Display, XK_Home);
+    io.KeyMap[ImGuiKey_End]        = XKeysymToKeycode(g_Display, XK_End);
+    io.KeyMap[ImGuiKey_Insert]     = XKeysymToKeycode(g_Display, XK_Insert);
+    io.KeyMap[ImGuiKey_Delete]     = XKeysymToKeycode(g_Display, XK_Delete);
+    io.KeyMap[ImGuiKey_Backspace]  = XKeysymToKeycode(g_Display, XK_BackSpace);
+    io.KeyMap[ImGuiKey_Space]      = XKeysymToKeycode(g_Display, XK_space);
+    io.KeyMap[ImGuiKey_Enter]      = XKeysymToKeycode(g_Display, XK_Return);
+    io.KeyMap[ImGuiKey_Escape]     = XKeysymToKeycode(g_Display, XK_Escape);
+    io.KeyMap[ImGuiKey_A]          = XKeysymToKeycode(g_Display, XK_A);
+    io.KeyMap[ImGuiKey_C]          = XKeysymToKeycode(g_Display, XK_C);
+    io.KeyMap[ImGuiKey_V]          = XKeysymToKeycode(g_Display, XK_V);
+    io.KeyMap[ImGuiKey_X]          = XKeysymToKeycode(g_Display, XK_X);
+    io.KeyMap[ImGuiKey_Y]          = XKeysymToKeycode(g_Display, XK_Y);
+    io.KeyMap[ImGuiKey_Z]          = XKeysymToKeycode(g_Display, XK_Z);
+
+    return true;
+}
+
+void    ImGui_ImplX11_Shutdown()
+{
+    g_Display = nullptr;
+    g_Window = 0;
+}
+
+static bool ImGui_ImplX11_UpdateMouseCursor()
+{
+    /*
+    ImGuiIO& io = ImGui::GetIO();
+    if (io.ConfigFlags & ImGuiConfigFlags_NoMouseCursorChange)
+        return false;
+
+    ImGuiMouseCursor imgui_cursor = ImGui::GetMouseCursor();
+    if (imgui_cursor == ImGuiMouseCursor_None || io.MouseDrawCursor)
+    {
+        // Hide OS mouse cursor if imgui is drawing it or if it wants no cursor
+        ::SetCursor(NULL);
+    }
+    else
+    {
+        // Show OS mouse cursor
+        LPTSTR win32_cursor = IDC_ARROW;
+        switch (imgui_cursor)
+        {
+        case ImGuiMouseCursor_Arrow:        win32_cursor = IDC_ARROW; break;
+        case ImGuiMouseCursor_TextInput:    win32_cursor = IDC_IBEAM; break;
+        case ImGuiMouseCursor_ResizeAll:    win32_cursor = IDC_SIZEALL; break;
+        case ImGuiMouseCursor_ResizeEW:     win32_cursor = IDC_SIZEWE; break;
+        case ImGuiMouseCursor_ResizeNS:     win32_cursor = IDC_SIZENS; break;
+        case ImGuiMouseCursor_ResizeNESW:   win32_cursor = IDC_SIZENESW; break;
+        case ImGuiMouseCursor_ResizeNWSE:   win32_cursor = IDC_SIZENWSE; break;
+        case ImGuiMouseCursor_Hand:         win32_cursor = IDC_HAND; break;
+        }
+        ::SetCursor(::LoadCursor(NULL, win32_cursor));
+    }
+    */
+    return true;
+}
+
+static void ImGui_ImplX11_UpdateMousePos()
+{
+    ImGuiIO& io = ImGui::GetIO();
+
+    // Set OS mouse position if requested (rarely used, only when ImGuiConfigFlags_NavEnableSetMousePos is enabled by user)
+    if (io.WantSetMousePos)
+    {
+    //    POINT pos = { (int)io.MousePos.x, (int)io.MousePos.y };
+    //    ::ClientToScreen(g_hWnd, &pos);
+    //    ::SetCursorPos(pos.x, pos.y);
+    }
+
+    // Set mouse position
+    Window unused_window;
+    int rx, ry, x, y;
+    unsigned int mask;
+
+    XQueryPointer(g_Display, g_Window, &unused_window, &unused_window, &rx, &ry, &x, &y, &mask);
+
+    io.MousePos = ImVec2((float)x, (float)y);
+}
+
+// Gamepad navigation mapping
+static void ImGui_ImplX11_UpdateGamepads()
+{
+    /* TODO: support linux gamepad ?
+    ImGuiIO& io = ImGui::GetIO();
+    memset(io.NavInputs, 0, sizeof(io.NavInputs));
+    if ((io.ConfigFlags & ImGuiConfigFlags_NavEnableGamepad) == 0)
+        return;
+
+    // Calling XInputGetState() every frame on disconnected gamepads is unfortunately too slow.
+    // Instead we refresh gamepad availability by calling XInputGetCapabilities() _only_ after receiving WM_DEVICECHANGE.
+    if (g_WantUpdateHasGamepad)
+    {
+        XINPUT_CAPABILITIES caps;
+        g_HasGamepad = (XInputGetCapabilities(0, XINPUT_FLAG_GAMEPAD, &caps) == ERROR_SUCCESS);
+        g_WantUpdateHasGamepad = false;
+    }
+
+    XINPUT_STATE xinput_state;
+    io.BackendFlags &= ~ImGuiBackendFlags_HasGamepad;
+    if (g_HasGamepad && XInputGetState(0, &xinput_state) == ERROR_SUCCESS)
+    {
+        const XINPUT_GAMEPAD& gamepad = xinput_state.Gamepad;
+        io.BackendFlags |= ImGuiBackendFlags_HasGamepad;
+
+        #define MAP_BUTTON(NAV_NO, BUTTON_ENUM)     { io.NavInputs[NAV_NO] = (gamepad.wButtons & BUTTON_ENUM) ? 1.0f : 0.0f; }
+        #define MAP_ANALOG(NAV_NO, VALUE, V0, V1)   { float vn = (float)(VALUE - V0) / (float)(V1 - V0); if (vn > 1.0f) vn = 1.0f; if (vn > 0.0f && io.NavInputs[NAV_NO] < vn) io.NavInputs[NAV_NO] = vn; }
+        MAP_BUTTON(ImGuiNavInput_Activate,      XINPUT_GAMEPAD_A);              // Cross / A
+        MAP_BUTTON(ImGuiNavInput_Cancel,        XINPUT_GAMEPAD_B);              // Circle / B
+        MAP_BUTTON(ImGuiNavInput_Menu,          XINPUT_GAMEPAD_X);              // Square / X
+        MAP_BUTTON(ImGuiNavInput_Input,         XINPUT_GAMEPAD_Y);              // Triangle / Y
+        MAP_BUTTON(ImGuiNavInput_DpadLeft,      XINPUT_GAMEPAD_DPAD_LEFT);      // D-Pad Left
+        MAP_BUTTON(ImGuiNavInput_DpadRight,     XINPUT_GAMEPAD_DPAD_RIGHT);     // D-Pad Right
+        MAP_BUTTON(ImGuiNavInput_DpadUp,        XINPUT_GAMEPAD_DPAD_UP);        // D-Pad Up
+        MAP_BUTTON(ImGuiNavInput_DpadDown,      XINPUT_GAMEPAD_DPAD_DOWN);      // D-Pad Down
+        MAP_BUTTON(ImGuiNavInput_FocusPrev,     XINPUT_GAMEPAD_LEFT_SHOULDER);  // L1 / LB
+        MAP_BUTTON(ImGuiNavInput_FocusNext,     XINPUT_GAMEPAD_RIGHT_SHOULDER); // R1 / RB
+        MAP_BUTTON(ImGuiNavInput_TweakSlow,     XINPUT_GAMEPAD_LEFT_SHOULDER);  // L1 / LB
+        MAP_BUTTON(ImGuiNavInput_TweakFast,     XINPUT_GAMEPAD_RIGHT_SHOULDER); // R1 / RB
+        MAP_ANALOG(ImGuiNavInput_LStickLeft,    gamepad.sThumbLX,  -XINPUT_GAMEPAD_LEFT_THUMB_DEADZONE, -32768);
+        MAP_ANALOG(ImGuiNavInput_LStickRight,   gamepad.sThumbLX,  +XINPUT_GAMEPAD_LEFT_THUMB_DEADZONE, +32767);
+        MAP_ANALOG(ImGuiNavInput_LStickUp,      gamepad.sThumbLY,  +XINPUT_GAMEPAD_LEFT_THUMB_DEADZONE, +32767);
+        MAP_ANALOG(ImGuiNavInput_LStickDown,    gamepad.sThumbLY,  -XINPUT_GAMEPAD_LEFT_THUMB_DEADZONE, -32767);
+        #undef MAP_BUTTON
+        #undef MAP_ANALOG
+    }
+    */
+}
+
+void    ImGui_ImplX11_NewFrame()
+{
+    ImGuiIO& io = ImGui::GetIO();
+    IM_ASSERT(io.Fonts->IsBuilt() && "Font atlas not built! It is generally built by the renderer back-end. Missing call to renderer _NewFrame() function? e.g. ImGui_ImplOpenGL3_NewFrame().");
+
+    unsigned int width, height;
+    Window unused_window;
+    int unused_int;
+    unsigned int unused_unsigned_int;
+
+    XGetGeometry(g_Display, (Window)g_Window, &unused_window, &unused_int, &unused_int, &width, &height, &unused_unsigned_int, &unused_unsigned_int);
+
+    io.DisplaySize.x = width;
+    io.DisplaySize.y = height;
+
+    timespec ts, tsres;
+    clock_gettime(CLOCK_MONOTONIC_RAW, &ts);
+
+    uint64_t current_time = static_cast<uint64_t>(ts.tv_nsec) + static_cast<uint64_t>(ts.tv_sec)*1000000000;
+
+    io.DeltaTime = (float)(current_time - g_Time) / g_TicksPerSecond;
+    g_Time = current_time;
+
+    // Read keyboard modifiers inputs
+    char keys[32];
+    XQueryKeymap(g_Display, keys);
+
+    io.KeyCtrl = GetKeyState(XK_Control_L, keys);
+    io.KeyShift = GetKeyState(XK_Shift_L, keys);
+    io.KeyAlt = GetKeyState(XK_Alt_L, keys);
+    io.KeySuper = false;
+    // io.KeysDown[], io.MousePos, io.MouseDown[], io.MouseWheel: filled by the WndProc handler below.
+
+    // Update OS mouse position
+    ImGui_ImplX11_UpdateMousePos();
+    /*
+    // Update OS mouse cursor with the cursor requested by imgui
+    ImGuiMouseCursor mouse_cursor = io.MouseDrawCursor ? ImGuiMouseCursor_None : ImGui::GetMouseCursor();
+    if (g_LastMouseCursor != mouse_cursor)
+    {
+        g_LastMouseCursor = mouse_cursor;
+        ImGui_ImplX11_UpdateMouseCursor();
+    }
+    */
+
+    // Update game controllers (if enabled and available)
+    ImGui_ImplX11_UpdateGamepads();
+}
+
+// Process X11 mouse/keyboard inputs.
+// You can read the io.WantCaptureMouse, io.WantCaptureKeyboard flags to tell if dear imgui wants to use your inputs.
+// - When io.WantCaptureMouse is true, do not dispatch mouse input data to your main application.
+// - When io.WantCaptureKeyboard is true, do not dispatch keyboard input data to your main application.
+// Generally you may always pass all inputs to dear imgui, and hide them from your application based on those two flags.
+IMGUI_IMPL_API int ImGui_ImplX11_EventHandler(XEvent &event)
+{
+    if (ImGui::GetCurrentContext() == NULL)
+        return 0;
+
+    ImGuiIO& io = ImGui::GetIO();
+    switch (event.type)
+    {
+        case ButtonPress:
+        case ButtonRelease:
+            switch(event.xbutton.button)
+            {
+                case Button1:
+                    io.MouseDown[0] = event.type == ButtonPress;
+                    break;
+
+                case Button2:
+                    io.MouseDown[2] = event.type == ButtonPress;
+                    break;
+
+                case Button3:
+                    io.MouseDown[1] = event.type == ButtonPress;
+                    break;
+
+                case Button4: // Mouse wheel up
+                    if( event.type == ButtonPress )
+                        io.MouseWheel += 1;
+                    return 0;
+
+                case Button5: // Mouse wheel down
+                    if( event.type == ButtonPress )
+                        io.MouseWheel -= 1;
+                    return 0;
+            }
+
+            break;
+
+        case KeyPress:
+        {
+            int key = XKeycodeToKeysym(g_Display, event.xkey.keycode, event.xkey.state & ShiftMask ? 1 : 0);
+            if( IsKeySys(key) )
+                io.KeysDown[event.xkey.keycode] = true;
+            else
+                io.AddInputCharacter(key);
+            return 0;
+        }
+
+        case KeyRelease:
+        {
+            int key = XKeycodeToKeysym(g_Display, event.xkey.keycode, event.xkey.state & ShiftMask ? 1 : 0);
+            if( IsKeySys(key) )
+                io.KeysDown[event.xkey.keycode] = false;
+            return 0;
+        }
+    }
+            /*
+    case WM_DEVICECHANGE:
+        if ((UINT)wParam == DBT_DEVNODES_CHANGED)
+            g_WantUpdateHasGamepad = true;
+        return 0;
+    }
+    */
+    return 0;
+}
+

ImGui/impls/linux/imgui_impl_x11.h

@@ -0,0 +1,21 @@
+// dear imgui: Platform Binding for Windows (standard windows API for 32 and 64 bits applications)
+// This needs to be used along with a Renderer (e.g. DirectX11, OpenGL3, Vulkan..)
+
+// Implemented features:
+//  [X] Platform: Clipboard support (for Win32 this is actually part of core imgui)
+//  [X] Platform: Mouse cursor shape and visibility. Disable with 'io.ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange'.
+//  [X] Platform: Keyboard arrays indexed using VK_* Virtual Key Codes, e.g. ImGui::IsKeyPressed(VK_SPACE).
+//  [X] Platform: Gamepad support. Enabled with 'io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad'.
+
+#pragma once
+
+IMGUI_IMPL_API bool     ImGui_ImplX11_Init(void* display, void* window);
+IMGUI_IMPL_API void     ImGui_ImplX11_Shutdown();
+IMGUI_IMPL_API void     ImGui_ImplX11_NewFrame();
+
+// Handler for Win32 messages, update mouse/keyboard data.
+// You may or not need this for your implementation, but it can serve as reference for handling inputs.
+// Intentionally commented out to avoid dragging dependencies on <windows.h> types. You can COPY this line into your .cpp code instead.
+/*
+IMGUI_IMPL_API int  ImGui_ImplX11_EventHandler(XEvent *event);
+*/

ImGui/impls/windows/imgui_impl_dx10.cpp

@@ -0,0 +1,557 @@
+// dear imgui: Renderer for DirectX10
+// This needs to be used along with a Platform Binding (e.g. Win32)
+
+// Implemented features:
+//  [X] Renderer: User texture binding. Use 'ID3D10ShaderResourceView*' as ImTextureID. Read the FAQ about ImTextureID in imgui.cpp.
+//  [X] Renderer: Support for large meshes (64k+ vertices) with 16-bits indices.
+
+// You can copy and use unmodified imgui_impl_* files in your project. See main.cpp for an example of using this.
+// If you are new to dear imgui, read examples/README.txt and read the documentation at the top of imgui.cpp.
+// https://github.com/ocornut/imgui
+
+// CHANGELOG
+// (minor and older changes stripped away, please see git history for details)
+//  2019-05-29: DirectX10: Added support for large mesh (64K+ vertices), enable ImGuiBackendFlags_RendererHasVtxOffset flag.
+//  2019-04-30: DirectX10: Added support for special ImDrawCallback_ResetRenderState callback to reset render state.
+//  2018-12-03: Misc: Added #pragma comment statement to automatically link with d3dcompiler.lib when using D3DCompile().
+//  2018-11-30: Misc: Setting up io.BackendRendererName so it can be displayed in the About Window.
+//  2018-07-13: DirectX10: Fixed unreleased resources in Init and Shutdown functions.
+//  2018-06-08: Misc: Extracted imgui_impl_dx10.cpp/.h away from the old combined DX10+Win32 example.
+//  2018-06-08: DirectX10: Use draw_data->DisplayPos and draw_data->DisplaySize to setup projection matrix and clipping rectangle.
+//  2018-04-09: Misc: Fixed erroneous call to io.Fonts->ClearInputData() + ClearTexData() that was left in DX10 example but removed in 1.47 (Nov 2015) on other back-ends.
+//  2018-02-16: Misc: Obsoleted the io.RenderDrawListsFn callback and exposed ImGui_ImplDX10_RenderDrawData() in the .h file so you can call it yourself.
+//  2018-02-06: Misc: Removed call to ImGui::Shutdown() which is not available from 1.60 WIP, user needs to call CreateContext/DestroyContext themselves.
+//  2016-05-07: DirectX10: Disabling depth-write.
+
+#include "../../imgui.h"
+#include "imgui_impl_dx10.h"
+
+// DirectX
+#include <stdio.h>
+#include <d3d10_1.h>
+#include <d3d10.h>
+
+#include "../../../overlay_experimental/windows/ImGui_ShaderBlobs.h"
+
+#ifdef USE_D3DCOMPILE
+static ID3DBlob* g_pVertexShaderBlob = NULL;
+static ID3DBlob* g_pPixelShaderBlob = NULL;
+#endif
+
+// DirectX data
+static ID3D10Device*            g_pd3dDevice = NULL;
+static IDXGIFactory*            g_pFactory = NULL;
+static ID3D10Buffer*            g_pVB = NULL;
+static ID3D10Buffer*            g_pIB = NULL;
+static ID3D10VertexShader*      g_pVertexShader = NULL;
+static ID3D10InputLayout*       g_pInputLayout = NULL;
+static ID3D10Buffer*            g_pVertexConstantBuffer = NULL;
+static ID3D10PixelShader*       g_pPixelShader = NULL;
+static ID3D10SamplerState*      g_pFontSampler = NULL;
+static ID3D10ShaderResourceView*g_pFontTextureView = NULL;
+static ID3D10RasterizerState*   g_pRasterizerState = NULL;
+static ID3D10BlendState*        g_pBlendState = NULL;
+static ID3D10DepthStencilState* g_pDepthStencilState = NULL;
+static int                      g_VertexBufferSize = 5000, g_IndexBufferSize = 10000;
+
+struct VERTEX_CONSTANT_BUFFER
+{
+    float   mvp[4][4];
+};
+
+static void ImGui_ImplDX10_SetupRenderState(ImDrawData* draw_data, ID3D10Device* ctx)
+{
+    // Setup viewport
+    D3D10_VIEWPORT vp;
+    memset(&vp, 0, sizeof(D3D10_VIEWPORT));
+    vp.Width = (UINT)draw_data->DisplaySize.x;
+    vp.Height = (UINT)draw_data->DisplaySize.y;
+    vp.MinDepth = 0.0f;
+    vp.MaxDepth = 1.0f;
+    vp.TopLeftX = vp.TopLeftY = 0;
+    ctx->RSSetViewports(1, &vp);
+
+    // Bind shader and vertex buffers
+    unsigned int stride = sizeof(ImDrawVert);
+    unsigned int offset = 0;
+    ctx->IASetInputLayout(g_pInputLayout);
+    ctx->IASetVertexBuffers(0, 1, &g_pVB, &stride, &offset);
+    ctx->IASetIndexBuffer(g_pIB, sizeof(ImDrawIdx) == 2 ? DXGI_FORMAT_R16_UINT : DXGI_FORMAT_R32_UINT, 0);
+    ctx->IASetPrimitiveTopology(D3D10_PRIMITIVE_TOPOLOGY_TRIANGLELIST);
+    ctx->VSSetShader(g_pVertexShader);
+    ctx->VSSetConstantBuffers(0, 1, &g_pVertexConstantBuffer);
+    ctx->PSSetShader(g_pPixelShader);
+    ctx->PSSetSamplers(0, 1, &g_pFontSampler);
+
+    // Setup render state
+    const float blend_factor[4] = { 0.f, 0.f, 0.f, 0.f };
+    ctx->OMSetBlendState(g_pBlendState, blend_factor, 0xffffffff);
+    ctx->OMSetDepthStencilState(g_pDepthStencilState, 0);
+    ctx->RSSetState(g_pRasterizerState);
+}
+
+// Render function
+// (this used to be set in io.RenderDrawListsFn and called by ImGui::Render(), but you can now call this directly from your main loop)
+void ImGui_ImplDX10_RenderDrawData(ImDrawData* draw_data)
+{
+    // Avoid rendering when minimized
+    if (draw_data->DisplaySize.x <= 0.0f || draw_data->DisplaySize.y <= 0.0f)
+        return;
+
+    ID3D10Device* ctx = g_pd3dDevice;
+
+    // Create and grow vertex/index buffers if needed
+    if (!g_pVB || g_VertexBufferSize < draw_data->TotalVtxCount)
+    {
+        if (g_pVB) { g_pVB->Release(); g_pVB = NULL; }
+        g_VertexBufferSize = draw_data->TotalVtxCount + 5000;
+        D3D10_BUFFER_DESC desc;
+        memset(&desc, 0, sizeof(D3D10_BUFFER_DESC));
+        desc.Usage = D3D10_USAGE_DYNAMIC;
+        desc.ByteWidth = g_VertexBufferSize * sizeof(ImDrawVert);
+        desc.BindFlags = D3D10_BIND_VERTEX_BUFFER;
+        desc.CPUAccessFlags = D3D10_CPU_ACCESS_WRITE;
+        desc.MiscFlags = 0;
+        if (ctx->CreateBuffer(&desc, NULL, &g_pVB) < 0)
+            return;
+    }
+
+    if (!g_pIB || g_IndexBufferSize < draw_data->TotalIdxCount)
+    {
+        if (g_pIB) { g_pIB->Release(); g_pIB = NULL; }
+        g_IndexBufferSize = draw_data->TotalIdxCount + 10000;
+        D3D10_BUFFER_DESC desc;
+        memset(&desc, 0, sizeof(D3D10_BUFFER_DESC));
+        desc.Usage = D3D10_USAGE_DYNAMIC;
+        desc.ByteWidth = g_IndexBufferSize * sizeof(ImDrawIdx);
+        desc.BindFlags = D3D10_BIND_INDEX_BUFFER;
+        desc.CPUAccessFlags = D3D10_CPU_ACCESS_WRITE;
+        if (ctx->CreateBuffer(&desc, NULL, &g_pIB) < 0)
+            return;
+    }
+
+    // Copy and convert all vertices into a single contiguous buffer
+    ImDrawVert* vtx_dst = NULL;
+    ImDrawIdx* idx_dst = NULL;
+    g_pVB->Map(D3D10_MAP_WRITE_DISCARD, 0, (void**)&vtx_dst);
+    g_pIB->Map(D3D10_MAP_WRITE_DISCARD, 0, (void**)&idx_dst);
+    for (int n = 0; n < draw_data->CmdListsCount; n++)
+    {
+        const ImDrawList* cmd_list = draw_data->CmdLists[n];
+        memcpy(vtx_dst, cmd_list->VtxBuffer.Data, cmd_list->VtxBuffer.Size * sizeof(ImDrawVert));
+        memcpy(idx_dst, cmd_list->IdxBuffer.Data, cmd_list->IdxBuffer.Size * sizeof(ImDrawIdx));
+        vtx_dst += cmd_list->VtxBuffer.Size;
+        idx_dst += cmd_list->IdxBuffer.Size;
+    }
+    g_pVB->Unmap();
+    g_pIB->Unmap();
+
+    // Setup orthographic projection matrix into our constant buffer
+    // Our visible imgui space lies from draw_data->DisplayPos (top left) to draw_data->DisplayPos+data_data->DisplaySize (bottom right). DisplayPos is (0,0) for single viewport apps.
+    {
+        void* mapped_resource;
+        if (g_pVertexConstantBuffer->Map(D3D10_MAP_WRITE_DISCARD, 0, &mapped_resource) != S_OK)
+            return;
+        VERTEX_CONSTANT_BUFFER* constant_buffer = (VERTEX_CONSTANT_BUFFER*)mapped_resource;
+        float L = draw_data->DisplayPos.x;
+        float R = draw_data->DisplayPos.x + draw_data->DisplaySize.x;
+        float T = draw_data->DisplayPos.y;
+        float B = draw_data->DisplayPos.y + draw_data->DisplaySize.y;
+        float mvp[4][4] =
+        {
+            { 2.0f/(R-L),   0.0f,           0.0f,       0.0f },
+            { 0.0f,         2.0f/(T-B),     0.0f,       0.0f },
+            { 0.0f,         0.0f,           0.5f,       0.0f },
+            { (R+L)/(L-R),  (T+B)/(B-T),    0.5f,       1.0f },
+        };
+        memcpy(&constant_buffer->mvp, mvp, sizeof(mvp));
+        g_pVertexConstantBuffer->Unmap();
+    }
+
+    // Backup DX state that will be modified to restore it afterwards (unfortunately this is very ugly looking and verbose. Close your eyes!)
+    struct BACKUP_DX10_STATE
+    {
+        UINT                        ScissorRectsCount, ViewportsCount;
+        D3D10_RECT                  ScissorRects[D3D10_VIEWPORT_AND_SCISSORRECT_OBJECT_COUNT_PER_PIPELINE];
+        D3D10_VIEWPORT              Viewports[D3D10_VIEWPORT_AND_SCISSORRECT_OBJECT_COUNT_PER_PIPELINE];
+        ID3D10RasterizerState*      RS;
+        ID3D10BlendState*           BlendState;
+        FLOAT                       BlendFactor[4];
+        UINT                        SampleMask;
+        UINT                        StencilRef;
+        ID3D10DepthStencilState*    DepthStencilState;
+        ID3D10ShaderResourceView*   PSShaderResource;
+        ID3D10SamplerState*         PSSampler;
+        ID3D10PixelShader*          PS;
+        ID3D10VertexShader*         VS;
+        D3D10_PRIMITIVE_TOPOLOGY    PrimitiveTopology;
+        ID3D10Buffer*               IndexBuffer, *VertexBuffer, *VSConstantBuffer;
+        UINT                        IndexBufferOffset, VertexBufferStride, VertexBufferOffset;
+        DXGI_FORMAT                 IndexBufferFormat;
+        ID3D10InputLayout*          InputLayout;
+    };
+    BACKUP_DX10_STATE old;
+    old.ScissorRectsCount = old.ViewportsCount = D3D10_VIEWPORT_AND_SCISSORRECT_OBJECT_COUNT_PER_PIPELINE;
+    ctx->RSGetScissorRects(&old.ScissorRectsCount, old.ScissorRects);
+    ctx->RSGetViewports(&old.ViewportsCount, old.Viewports);
+    ctx->RSGetState(&old.RS);
+    ctx->OMGetBlendState(&old.BlendState, old.BlendFactor, &old.SampleMask);
+    ctx->OMGetDepthStencilState(&old.DepthStencilState, &old.StencilRef);
+    ctx->PSGetShaderResources(0, 1, &old.PSShaderResource);
+    ctx->PSGetSamplers(0, 1, &old.PSSampler);
+    ctx->PSGetShader(&old.PS);
+    ctx->VSGetShader(&old.VS);
+    ctx->VSGetConstantBuffers(0, 1, &old.VSConstantBuffer);
+    ctx->IAGetPrimitiveTopology(&old.PrimitiveTopology);
+    ctx->IAGetIndexBuffer(&old.IndexBuffer, &old.IndexBufferFormat, &old.IndexBufferOffset);
+    ctx->IAGetVertexBuffers(0, 1, &old.VertexBuffer, &old.VertexBufferStride, &old.VertexBufferOffset);
+    ctx->IAGetInputLayout(&old.InputLayout);
+
+    // Setup desired DX state
+    ImGui_ImplDX10_SetupRenderState(draw_data, ctx);
+
+    // Render command lists
+    // (Because we merged all buffers into a single one, we maintain our own offset into them)
+    int global_vtx_offset = 0;
+    int global_idx_offset = 0;
+    ImVec2 clip_off = draw_data->DisplayPos;
+    for (int n = 0; n < draw_data->CmdListsCount; n++)
+    {
+        const ImDrawList* cmd_list = draw_data->CmdLists[n];
+        for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.Size; cmd_i++)
+        {
+            const ImDrawCmd* pcmd = &cmd_list->CmdBuffer[cmd_i];
+            if (pcmd->UserCallback)
+            {
+                // User callback, registered via ImDrawList::AddCallback()
+                // (ImDrawCallback_ResetRenderState is a special callback value used by the user to request the renderer to reset render state.)
+                if (pcmd->UserCallback == ImDrawCallback_ResetRenderState)
+                    ImGui_ImplDX10_SetupRenderState(draw_data, ctx);
+                else
+                    pcmd->UserCallback(cmd_list, pcmd);
+            }
+            else
+            {
+                // Apply scissor/clipping rectangle
+                const D3D10_RECT r = { (LONG)(pcmd->ClipRect.x - clip_off.x), (LONG)(pcmd->ClipRect.y - clip_off.y), (LONG)(pcmd->ClipRect.z - clip_off.x), (LONG)(pcmd->ClipRect.w - clip_off.y)};
+                ctx->RSSetScissorRects(1, &r);
+
+                // Bind texture, Draw
+                ID3D10ShaderResourceView* texture_srv = (ID3D10ShaderResourceView*)pcmd->TextureId;
+                ctx->PSSetShaderResources(0, 1, &texture_srv);
+                ctx->DrawIndexed(pcmd->ElemCount, pcmd->IdxOffset + global_idx_offset, pcmd->VtxOffset + global_vtx_offset);
+            }
+        }
+        global_idx_offset += cmd_list->IdxBuffer.Size;
+        global_vtx_offset += cmd_list->VtxBuffer.Size;
+    }
+
+    // Restore modified DX state
+    ctx->RSSetScissorRects(old.ScissorRectsCount, old.ScissorRects);
+    ctx->RSSetViewports(old.ViewportsCount, old.Viewports);
+    ctx->RSSetState(old.RS); if (old.RS) old.RS->Release();
+    ctx->OMSetBlendState(old.BlendState, old.BlendFactor, old.SampleMask); if (old.BlendState) old.BlendState->Release();
+    ctx->OMSetDepthStencilState(old.DepthStencilState, old.StencilRef); if (old.DepthStencilState) old.DepthStencilState->Release();
+    ctx->PSSetShaderResources(0, 1, &old.PSShaderResource); if (old.PSShaderResource) old.PSShaderResource->Release();
+    ctx->PSSetSamplers(0, 1, &old.PSSampler); if (old.PSSampler) old.PSSampler->Release();
+    ctx->PSSetShader(old.PS); if (old.PS) old.PS->Release();
+    ctx->VSSetShader(old.VS); if (old.VS) old.VS->Release();
+    ctx->VSSetConstantBuffers(0, 1, &old.VSConstantBuffer); if (old.VSConstantBuffer) old.VSConstantBuffer->Release();
+    ctx->IASetPrimitiveTopology(old.PrimitiveTopology);
+    ctx->IASetIndexBuffer(old.IndexBuffer, old.IndexBufferFormat, old.IndexBufferOffset); if (old.IndexBuffer) old.IndexBuffer->Release();
+    ctx->IASetVertexBuffers(0, 1, &old.VertexBuffer, &old.VertexBufferStride, &old.VertexBufferOffset); if (old.VertexBuffer) old.VertexBuffer->Release();
+    ctx->IASetInputLayout(old.InputLayout); if (old.InputLayout) old.InputLayout->Release();
+}
+
+static void ImGui_ImplDX10_CreateFontsTexture()
+{
+    // Build texture atlas
+    ImGuiIO& io = ImGui::GetIO();
+    unsigned char* pixels;
+    int width, height;
+    io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height);
+
+    // Upload texture to graphics system
+    {
+        D3D10_TEXTURE2D_DESC desc;
+        ZeroMemory(&desc, sizeof(desc));
+        desc.Width = width;
+        desc.Height = height;
+        desc.MipLevels = 1;
+        desc.ArraySize = 1;
+        desc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
+        desc.SampleDesc.Count = 1;
+        desc.Usage = D3D10_USAGE_DEFAULT;
+        desc.BindFlags = D3D10_BIND_SHADER_RESOURCE;
+        desc.CPUAccessFlags = 0;
+
+        ID3D10Texture2D *pTexture = NULL;
+        D3D10_SUBRESOURCE_DATA subResource;
+        subResource.pSysMem = pixels;
+        subResource.SysMemPitch = desc.Width * 4;
+        subResource.SysMemSlicePitch = 0;
+        g_pd3dDevice->CreateTexture2D(&desc, &subResource, &pTexture);
+
+        // Create texture view
+        D3D10_SHADER_RESOURCE_VIEW_DESC srv_desc;
+        ZeroMemory(&srv_desc, sizeof(srv_desc));
+        srv_desc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
+        srv_desc.ViewDimension = D3D10_SRV_DIMENSION_TEXTURE2D;
+        srv_desc.Texture2D.MipLevels = desc.MipLevels;
+        srv_desc.Texture2D.MostDetailedMip = 0;
+        g_pd3dDevice->CreateShaderResourceView(pTexture, &srv_desc, &g_pFontTextureView);
+        pTexture->Release();
+    }
+
+    // Store our identifier
+    io.Fonts->TexID = (ImTextureID)g_pFontTextureView;
+
+    // Create texture sampler
+    {
+        D3D10_SAMPLER_DESC desc;
+        ZeroMemory(&desc, sizeof(desc));
+        desc.Filter = D3D10_FILTER_MIN_MAG_MIP_LINEAR;
+        desc.AddressU = D3D10_TEXTURE_ADDRESS_WRAP;
+        desc.AddressV = D3D10_TEXTURE_ADDRESS_WRAP;
+        desc.AddressW = D3D10_TEXTURE_ADDRESS_WRAP;
+        desc.MipLODBias = 0.f;
+        desc.ComparisonFunc = D3D10_COMPARISON_ALWAYS;
+        desc.MinLOD = 0.f;
+        desc.MaxLOD = 0.f;
+        g_pd3dDevice->CreateSamplerState(&desc, &g_pFontSampler);
+    }
+}
+
+bool    ImGui_ImplDX10_CreateDeviceObjects()
+{
+    if (!g_pd3dDevice)
+        return false;
+    if (g_pFontSampler)
+        ImGui_ImplDX10_InvalidateDeviceObjects();
+
+    // By using D3DCompile() from <d3dcompiler.h> / d3dcompiler.lib, we introduce a dependency to a given version of d3dcompiler_XX.dll (see D3DCOMPILER_DLL_A)
+    // If you would like to use this DX10 sample code but remove this dependency you can:
+    //  1) compile once, save the compiled shader blobs into a file or source code and pass them to CreateVertexShader()/CreatePixelShader() [preferred solution]
+    //  2) use code to detect any version of the DLL and grab a pointer to D3DCompile from the DLL.
+    // See https://github.com/ocornut/imgui/pull/638 for sources and details.
+
+#ifdef USE_D3DCOMPILE
+    decltype(D3DCompile)* D3DCompile = load_d3dcompile();
+    if (D3DCompile == nullptr)
+        return false;
+#endif
+
+    // Create the vertex shader
+    {
+#ifdef USE_D3DCOMPILE
+        static const char* vertexShader =
+            "cbuffer vertexBuffer : register(b0) \
+            {\
+              float4x4 ProjectionMatrix; \
+            };\
+            struct VS_INPUT\
+            {\
+              float2 pos : POSITION;\
+              float4 col : COLOR0;\
+              float2 uv  : TEXCOORD0;\
+            };\
+            \
+            struct PS_INPUT\
+            {\
+              float4 pos : SV_POSITION;\
+              float4 col : COLOR0;\
+              float2 uv  : TEXCOORD0;\
+            };\
+            \
+            PS_INPUT main(VS_INPUT input)\
+            {\
+              PS_INPUT output;\
+              output.pos = mul( ProjectionMatrix, float4(input.pos.xy, 0.f, 1.f));\
+              output.col = input.col;\
+              output.uv  = input.uv;\
+              return output;\
+            }";
+
+        D3DCompile(vertexShader, strlen(vertexShader), NULL, NULL, NULL, "main", "vs_4_0", 0, 0, &g_pVertexShaderBlob, NULL);
+
+        if (g_pVertexShaderBlob == NULL) // NB: Pass ID3D10Blob* pErrorBlob to D3DCompile() to get error showing in (const char*)pErrorBlob->GetBufferPointer(). Make sure to Release() the blob!
+            return false;
+
+        if (g_pd3dDevice->CreateVertexShader((DWORD*)g_pVertexShaderBlob->GetBufferPointer(), g_pVertexShaderBlob->GetBufferSize(), &g_pVertexShader) != S_OK)
+            return false;
+#else
+        if (g_pd3dDevice->CreateVertexShader(ImGui_vertexShaderDX10, ImGui_vertexShaderDX10_len, &g_pVertexShader) != S_OK)
+            return false;
+#endif
+
+        // Create the input layout
+        D3D10_INPUT_ELEMENT_DESC local_layout[] =
+        {
+            { "POSITION", 0, DXGI_FORMAT_R32G32_FLOAT,   0, (UINT)(&((ImDrawVert*)0)->pos), D3D10_INPUT_PER_VERTEX_DATA, 0 },
+            { "TEXCOORD", 0, DXGI_FORMAT_R32G32_FLOAT,   0, (UINT)(&((ImDrawVert*)0)->uv),  D3D10_INPUT_PER_VERTEX_DATA, 0 },
+            { "COLOR",    0, DXGI_FORMAT_R8G8B8A8_UNORM, 0, (UINT)(&((ImDrawVert*)0)->col), D3D10_INPUT_PER_VERTEX_DATA, 0 },
+        };
+#ifdef USE_D3DCOMPILE
+        if (g_pd3dDevice->CreateInputLayout(local_layout, 3, g_pVertexShaderBlob->GetBufferPointer(), g_pVertexShaderBlob->GetBufferSize(), &g_pInputLayout) != S_OK)
+            return false;
+#else
+        if (g_pd3dDevice->CreateInputLayout(local_layout, 3, ImGui_vertexShaderDX10, ImGui_vertexShaderDX10_len, &g_pInputLayout) != S_OK)
+            return false;
+#endif
+
+        // Create the constant buffer
+        {
+            D3D10_BUFFER_DESC desc;
+            desc.ByteWidth = sizeof(VERTEX_CONSTANT_BUFFER);
+            desc.Usage = D3D10_USAGE_DYNAMIC;
+            desc.BindFlags = D3D10_BIND_CONSTANT_BUFFER;
+            desc.CPUAccessFlags = D3D10_CPU_ACCESS_WRITE;
+            desc.MiscFlags = 0;
+            g_pd3dDevice->CreateBuffer(&desc, NULL, &g_pVertexConstantBuffer);
+        }
+    }
+
+    // Create the pixel shader
+    {
+#ifdef USE_D3DCOMPILE
+        static const char* pixelShader =
+            "struct PS_INPUT\
+            {\
+            float4 pos : SV_POSITION;\
+            float4 col : COLOR0;\
+            float2 uv  : TEXCOORD0;\
+            };\
+            sampler sampler0;\
+            Texture2D texture0;\
+            \
+            float4 main(PS_INPUT input) : SV_Target\
+            {\
+            float4 out_col = input.col * texture0.Sample(sampler0, input.uv); \
+            return out_col; \
+            }";
+
+        D3DCompile(pixelShader, strlen(pixelShader), NULL, NULL, NULL, "main", "ps_4_0", 0, 0, &g_pPixelShaderBlob, NULL);
+
+        if (g_pPixelShaderBlob == NULL)  // NB: Pass ID3D10Blob* pErrorBlob to D3DCompile() to get error showing in (const char*)pErrorBlob->GetBufferPointer(). Make sure to Release() the blob!
+            return false;
+        if (g_pd3dDevice->CreatePixelShader((DWORD*)g_pPixelShaderBlob->GetBufferPointer(), g_pPixelShaderBlob->GetBufferSize(), &g_pPixelShader) != S_OK)
+            return false;
+#else
+        if (g_pd3dDevice->CreatePixelShader(ImGui_pixelShaderDX10, ImGui_pixelShaderDX10_len, &g_pPixelShader) != S_OK)
+            return false;
+#endif
+    }
+
+#ifdef USE_D3DCOMPILE
+    unload_d3dcompile();
+#endif
+
+    // Create the blending setup
+    {
+        D3D10_BLEND_DESC desc;
+        ZeroMemory(&desc, sizeof(desc));
+        desc.AlphaToCoverageEnable = false;
+        desc.BlendEnable[0] = true;
+        desc.SrcBlend = D3D10_BLEND_SRC_ALPHA;
+        desc.DestBlend = D3D10_BLEND_INV_SRC_ALPHA;
+        desc.BlendOp = D3D10_BLEND_OP_ADD;
+        desc.SrcBlendAlpha = D3D10_BLEND_INV_SRC_ALPHA;
+        desc.DestBlendAlpha = D3D10_BLEND_ZERO;
+        desc.BlendOpAlpha = D3D10_BLEND_OP_ADD;
+        desc.RenderTargetWriteMask[0] = D3D10_COLOR_WRITE_ENABLE_ALL;
+        g_pd3dDevice->CreateBlendState(&desc, &g_pBlendState);
+    }
+
+    // Create the rasterizer state
+    {
+        D3D10_RASTERIZER_DESC desc;
+        ZeroMemory(&desc, sizeof(desc));
+        desc.FillMode = D3D10_FILL_SOLID;
+        desc.CullMode = D3D10_CULL_NONE;
+        desc.ScissorEnable = true;
+        desc.DepthClipEnable = true;
+        g_pd3dDevice->CreateRasterizerState(&desc, &g_pRasterizerState);
+    }
+
+    // Create depth-stencil State
+    {
+        D3D10_DEPTH_STENCIL_DESC desc;
+        ZeroMemory(&desc, sizeof(desc));
+        desc.DepthEnable = false;
+        desc.DepthWriteMask = D3D10_DEPTH_WRITE_MASK_ALL;
+        desc.DepthFunc = D3D10_COMPARISON_ALWAYS;
+        desc.StencilEnable = false;
+        desc.FrontFace.StencilFailOp = desc.FrontFace.StencilDepthFailOp = desc.FrontFace.StencilPassOp = D3D10_STENCIL_OP_KEEP;
+        desc.FrontFace.StencilFunc = D3D10_COMPARISON_ALWAYS;
+        desc.BackFace = desc.FrontFace;
+        g_pd3dDevice->CreateDepthStencilState(&desc, &g_pDepthStencilState);
+    }
+
+    ImGui_ImplDX10_CreateFontsTexture();
+
+    return true;
+}
+
+void    ImGui_ImplDX10_InvalidateDeviceObjects()
+{
+    if (!g_pd3dDevice)
+        return;
+
+    if (g_pFontSampler) { g_pFontSampler->Release(); g_pFontSampler = NULL; }
+    if (g_pFontTextureView) { g_pFontTextureView->Release(); g_pFontTextureView = NULL; ImGui::GetIO().Fonts->TexID = NULL; } // We copied g_pFontTextureView to io.Fonts->TexID so let's clear that as well.
+    if (g_pIB) { g_pIB->Release(); g_pIB = NULL; }
+    if (g_pVB) { g_pVB->Release(); g_pVB = NULL; }
+
+    if (g_pBlendState) { g_pBlendState->Release(); g_pBlendState = NULL; }
+    if (g_pDepthStencilState) { g_pDepthStencilState->Release(); g_pDepthStencilState = NULL; }
+    if (g_pRasterizerState) { g_pRasterizerState->Release(); g_pRasterizerState = NULL; }
+    if (g_pPixelShader) { g_pPixelShader->Release(); g_pPixelShader = NULL; }
+    if (g_pVertexConstantBuffer) { g_pVertexConstantBuffer->Release(); g_pVertexConstantBuffer = NULL; }
+    if (g_pInputLayout) { g_pInputLayout->Release(); g_pInputLayout = NULL; }
+    if (g_pVertexShader) { g_pVertexShader->Release(); g_pVertexShader = NULL; }
+#ifdef USE_D3DCOMPILE
+    if (g_pPixelShaderBlob) { g_pPixelShaderBlob->Release(); g_pPixelShaderBlob = NULL; }
+    if (g_pVertexShaderBlob) { g_pVertexShaderBlob->Release(); g_pVertexShaderBlob = NULL; }
+#endif
+}
+
+bool    ImGui_ImplDX10_Init(ID3D10Device* device)
+{
+    // Setup back-end capabilities flags
+    ImGuiIO& io = ImGui::GetIO();
+    io.BackendRendererName = "imgui_impl_dx10";
+    io.BackendFlags |= ImGuiBackendFlags_RendererHasVtxOffset;  // We can honor the ImDrawCmd::VtxOffset field, allowing for large meshes.
+
+    // Get factory from device
+    IDXGIDevice* pDXGIDevice = NULL;
+    IDXGIAdapter* pDXGIAdapter = NULL;
+    IDXGIFactory* pFactory = NULL;
+
+    if (device->QueryInterface(IID_PPV_ARGS(&pDXGIDevice)) == S_OK)
+        if (pDXGIDevice->GetParent(IID_PPV_ARGS(&pDXGIAdapter)) == S_OK)
+            if (pDXGIAdapter->GetParent(IID_PPV_ARGS(&pFactory)) == S_OK)
+            {
+                g_pd3dDevice = device;
+                g_pFactory = pFactory;
+            }
+    if (pDXGIDevice) pDXGIDevice->Release();
+    if (pDXGIAdapter) pDXGIAdapter->Release();
+    g_pd3dDevice->AddRef();
+
+    return true;
+}
+
+void ImGui_ImplDX10_Shutdown()
+{
+    ImGui_ImplDX10_InvalidateDeviceObjects();
+    if (g_pFactory) { g_pFactory->Release(); g_pFactory = NULL; }
+    if (g_pd3dDevice) { g_pd3dDevice->Release(); g_pd3dDevice = NULL; }
+}
+
+bool ImGui_ImplDX10_NewFrame()
+{
+    if (!g_pFontSampler)
+        return ImGui_ImplDX10_CreateDeviceObjects();
+
+    return true;
+}

ImGui/impls/windows/imgui_impl_dx10.h

@@ -0,0 +1,23 @@
+// dear imgui: Renderer for DirectX10
+// This needs to be used along with a Platform Binding (e.g. Win32)
+
+// Implemented features:
+//  [X] Renderer: User texture binding. Use 'ID3D10ShaderResourceView*' as ImTextureID. Read the FAQ about ImTextureID in imgui.cpp.
+//  [X] Renderer: Support for large meshes (64k+ vertices) with 16-bits indices.
+
+// You can copy and use unmodified imgui_impl_* files in your project. See main.cpp for an example of using this.
+// If you are new to dear imgui, read examples/README.txt and read the documentation at the top of imgui.cpp.
+// https://github.com/ocornut/imgui
+
+#pragma once
+
+struct ID3D10Device;
+
+IMGUI_IMPL_API bool     ImGui_ImplDX10_Init(ID3D10Device* device);
+IMGUI_IMPL_API void     ImGui_ImplDX10_Shutdown();
+IMGUI_IMPL_API bool     ImGui_ImplDX10_NewFrame();
+IMGUI_IMPL_API void     ImGui_ImplDX10_RenderDrawData(ImDrawData* draw_data);
+
+// Use if you want to reset your rendering device without losing ImGui state.
+IMGUI_IMPL_API void     ImGui_ImplDX10_InvalidateDeviceObjects();
+IMGUI_IMPL_API bool     ImGui_ImplDX10_CreateDeviceObjects();

ImGui/impls/windows/imgui_impl_dx11.cpp

@@ -0,0 +1,684 @@
+// dear imgui: Renderer for DirectX11
+// This needs to be used along with a Platform Binding (e.g. Win32)
+
+// Implemented features:
+//  [X] Renderer: User texture binding. Use 'ID3D11ShaderResourceView*' as ImTextureID. Read the FAQ about ImTextureID in imgui.cpp.
+//  [X] Renderer: Support for large meshes (64k+ vertices) with 16-bits indices.
+
+// You can copy and use unmodified imgui_impl_* files in your project. See main.cpp for an example of using this.
+// If you are new to dear imgui, read examples/README.txt and read the documentation at the top of imgui.cpp
+// https://github.com/ocornut/imgui
+
+// CHANGELOG
+// (minor and older changes stripped away, please see git history for details)
+//  2019-05-29: DirectX11: Added support for large mesh (64K+ vertices), enable ImGuiBackendFlags_RendererHasVtxOffset flag.
+//  2019-04-30: DirectX11: Added support for special ImDrawCallback_ResetRenderState callback to reset render state.
+//  2018-12-03: Misc: Added #pragma comment statement to automatically link with d3dcompiler.lib when using D3DCompile().
+//  2018-11-30: Misc: Setting up io.BackendRendererName so it can be displayed in the About Window.
+//  2018-08-01: DirectX11: Querying for IDXGIFactory instead of IDXGIFactory1 to increase compatibility.
+//  2018-07-13: DirectX11: Fixed unreleased resources in Init and Shutdown functions.
+//  2018-06-08: Misc: Extracted imgui_impl_dx11.cpp/.h away from the old combined DX11+Win32 example.
+//  2018-06-08: DirectX11: Use draw_data->DisplayPos and draw_data->DisplaySize to setup projection matrix and clipping rectangle.
+//  2018-02-16: Misc: Obsoleted the io.RenderDrawListsFn callback and exposed ImGui_ImplDX11_RenderDrawData() in the .h file so you can call it yourself.
+//  2018-02-06: Misc: Removed call to ImGui::Shutdown() which is not available from 1.60 WIP, user needs to call CreateContext/DestroyContext themselves.
+//  2016-05-07: DirectX11: Disabling depth-write.
+
+#include "../../imgui.h"
+#include "imgui_impl_dx11.h"
+
+// DirectX
+#include <stdio.h>
+#include <d3d11.h>
+
+#include "../../../overlay_experimental/windows/ImGui_ShaderBlobs.h"
+
+#ifdef USE_D3DCOMPILE
+static ID3DBlob* g_pVertexShaderBlob = NULL;
+static ID3DBlob* g_pPixelShaderBlob  = NULL;
+#endif
+
+// DirectX data
+static ID3D11Device*            g_pd3dDevice = NULL;
+static ID3D11DeviceContext*     g_pd3dDeviceContext = NULL;
+static IDXGIFactory*            g_pFactory = NULL;
+static ID3D11Buffer*            g_pVB = NULL;
+static ID3D11Buffer*            g_pIB = NULL;
+static ID3D11VertexShader*      g_pVertexShader = NULL;
+static ID3D11InputLayout*       g_pInputLayout = NULL;
+static ID3D11Buffer*            g_pVertexConstantBuffer = NULL;
+static ID3D11PixelShader*       g_pPixelShader = NULL;
+static ID3D11SamplerState*      g_pFontSampler = NULL;
+static ID3D11ShaderResourceView*g_pFontTextureView = NULL;
+static ID3D11RasterizerState*   g_pRasterizerState = NULL;
+static ID3D11BlendState*        g_pBlendState = NULL;
+static ID3D11DepthStencilState* g_pDepthStencilState = NULL;
+static int                      g_VertexBufferSize = 5000, g_IndexBufferSize = 10000;
+
+struct VERTEX_CONSTANT_BUFFER
+{
+    float   mvp[4][4];
+};
+
+static void ImGui_ImplDX11_SetupRenderState(ImDrawData* draw_data, ID3D11DeviceContext* ctx)
+{
+    // Setup viewport
+    D3D11_VIEWPORT vp;
+    memset(&vp, 0, sizeof(D3D11_VIEWPORT));
+    vp.Width = draw_data->DisplaySize.x;
+    vp.Height = draw_data->DisplaySize.y;
+    vp.MinDepth = 0.0f;
+    vp.MaxDepth = 1.0f;
+    vp.TopLeftX = vp.TopLeftY = 0;
+    ctx->RSSetViewports(1, &vp);
+
+    // Setup shader and vertex buffers
+    unsigned int stride = sizeof(ImDrawVert);
+    unsigned int offset = 0;
+    ctx->IASetInputLayout(g_pInputLayout);
+    ctx->IASetVertexBuffers(0, 1, &g_pVB, &stride, &offset);
+    ctx->IASetIndexBuffer(g_pIB, sizeof(ImDrawIdx) == 2 ? DXGI_FORMAT_R16_UINT : DXGI_FORMAT_R32_UINT, 0);
+    ctx->IASetPrimitiveTopology(D3D11_PRIMITIVE_TOPOLOGY_TRIANGLELIST);
+    ctx->VSSetShader(g_pVertexShader, NULL, 0);
+    ctx->VSSetConstantBuffers(0, 1, &g_pVertexConstantBuffer);
+    ctx->PSSetShader(g_pPixelShader, NULL, 0);
+    ctx->PSSetSamplers(0, 1, &g_pFontSampler);
+
+    // Setup blend state
+    const float blend_factor[4] = { 0.f, 0.f, 0.f, 0.f };
+    ctx->OMSetBlendState(g_pBlendState, blend_factor, 0xffffffff);
+    ctx->OMSetDepthStencilState(g_pDepthStencilState, 0);
+    ctx->RSSetState(g_pRasterizerState);
+}
+
+// Render function
+// (this used to be set in io.RenderDrawListsFn and called by ImGui::Render(), but you can now call this directly from your main loop)
+void ImGui_ImplDX11_RenderDrawData(ImDrawData* draw_data)
+{
+    // Avoid rendering when minimized
+    if (draw_data->DisplaySize.x <= 0.0f || draw_data->DisplaySize.y <= 0.0f)
+        return;
+
+    ID3D11DeviceContext* ctx = g_pd3dDeviceContext;
+
+    // Create and grow vertex/index buffers if needed
+    if (!g_pVB || g_VertexBufferSize < draw_data->TotalVtxCount)
+    {
+        if (g_pVB) { g_pVB->Release(); g_pVB = NULL; }
+        g_VertexBufferSize = draw_data->TotalVtxCount + 5000;
+        D3D11_BUFFER_DESC desc;
+        memset(&desc, 0, sizeof(D3D11_BUFFER_DESC));
+        desc.Usage = D3D11_USAGE_DYNAMIC;
+        desc.ByteWidth = g_VertexBufferSize * sizeof(ImDrawVert);
+        desc.BindFlags = D3D11_BIND_VERTEX_BUFFER;
+        desc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;
+        desc.MiscFlags = 0;
+        if (g_pd3dDevice->CreateBuffer(&desc, NULL, &g_pVB) < 0)
+            return;
+    }
+    if (!g_pIB || g_IndexBufferSize < draw_data->TotalIdxCount)
+    {
+        if (g_pIB) { g_pIB->Release(); g_pIB = NULL; }
+        g_IndexBufferSize = draw_data->TotalIdxCount + 10000;
+        D3D11_BUFFER_DESC desc;
+        memset(&desc, 0, sizeof(D3D11_BUFFER_DESC));
+        desc.Usage = D3D11_USAGE_DYNAMIC;
+        desc.ByteWidth = g_IndexBufferSize * sizeof(ImDrawIdx);
+        desc.BindFlags = D3D11_BIND_INDEX_BUFFER;
+        desc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;
+        if (g_pd3dDevice->CreateBuffer(&desc, NULL, &g_pIB) < 0)
+            return;
+    }
+
+    // Upload vertex/index data into a single contiguous GPU buffer
+    D3D11_MAPPED_SUBRESOURCE vtx_resource, idx_resource;
+    if (ctx->Map(g_pVB, 0, D3D11_MAP_WRITE_DISCARD, 0, &vtx_resource) != S_OK)
+        return;
+    if (ctx->Map(g_pIB, 0, D3D11_MAP_WRITE_DISCARD, 0, &idx_resource) != S_OK)
+        return;
+    ImDrawVert* vtx_dst = (ImDrawVert*)vtx_resource.pData;
+    ImDrawIdx* idx_dst = (ImDrawIdx*)idx_resource.pData;
+    for (int n = 0; n < draw_data->CmdListsCount; n++)
+    {
+        const ImDrawList* cmd_list = draw_data->CmdLists[n];
+        memcpy(vtx_dst, cmd_list->VtxBuffer.Data, cmd_list->VtxBuffer.Size * sizeof(ImDrawVert));
+        memcpy(idx_dst, cmd_list->IdxBuffer.Data, cmd_list->IdxBuffer.Size * sizeof(ImDrawIdx));
+        vtx_dst += cmd_list->VtxBuffer.Size;
+        idx_dst += cmd_list->IdxBuffer.Size;
+    }
+    ctx->Unmap(g_pVB, 0);
+    ctx->Unmap(g_pIB, 0);
+
+    // Setup orthographic projection matrix into our constant buffer
+    // Our visible imgui space lies from draw_data->DisplayPos (top left) to draw_data->DisplayPos+data_data->DisplaySize (bottom right). DisplayPos is (0,0) for single viewport apps.
+    {
+        D3D11_MAPPED_SUBRESOURCE mapped_resource;
+        if (ctx->Map(g_pVertexConstantBuffer, 0, D3D11_MAP_WRITE_DISCARD, 0, &mapped_resource) != S_OK)
+            return;
+        VERTEX_CONSTANT_BUFFER* constant_buffer = (VERTEX_CONSTANT_BUFFER*)mapped_resource.pData;
+        float L = draw_data->DisplayPos.x;
+        float R = draw_data->DisplayPos.x + draw_data->DisplaySize.x;
+        float T = draw_data->DisplayPos.y;
+        float B = draw_data->DisplayPos.y + draw_data->DisplaySize.y;
+        float mvp[4][4] =
+        {
+            { 2.0f/(R-L),   0.0f,           0.0f,       0.0f },
+            { 0.0f,         2.0f/(T-B),     0.0f,       0.0f },
+            { 0.0f,         0.0f,           0.5f,       0.0f },
+            { (R+L)/(L-R),  (T+B)/(B-T),    0.5f,       1.0f },
+        };
+        memcpy(&constant_buffer->mvp, mvp, sizeof(mvp));
+        ctx->Unmap(g_pVertexConstantBuffer, 0);
+    }
+
+    // Backup DX state that will be modified to restore it afterwards (unfortunately this is very ugly looking and verbose. Close your eyes!)
+    struct BACKUP_DX11_STATE
+    {
+        UINT                        ScissorRectsCount, ViewportsCount;
+        D3D11_RECT                  ScissorRects[D3D11_VIEWPORT_AND_SCISSORRECT_OBJECT_COUNT_PER_PIPELINE];
+        D3D11_VIEWPORT              Viewports[D3D11_VIEWPORT_AND_SCISSORRECT_OBJECT_COUNT_PER_PIPELINE];
+        ID3D11RasterizerState*      RS;
+        ID3D11BlendState*           BlendState;
+        FLOAT                       BlendFactor[4];
+        UINT                        SampleMask;
+        UINT                        StencilRef;
+        ID3D11DepthStencilState*    DepthStencilState;
+        ID3D11ShaderResourceView*   PSShaderResource;
+        ID3D11SamplerState*         PSSampler;
+        ID3D11PixelShader*          PS;
+        ID3D11VertexShader*         VS;
+        UINT                        PSInstancesCount, VSInstancesCount;
+        ID3D11ClassInstance*        PSInstances[256], *VSInstances[256];   // 256 is max according to PSSetShader documentation
+        D3D11_PRIMITIVE_TOPOLOGY    PrimitiveTopology;
+        ID3D11Buffer*               IndexBuffer, *VertexBuffer, *VSConstantBuffer;
+        UINT                        IndexBufferOffset, VertexBufferStride, VertexBufferOffset;
+        DXGI_FORMAT                 IndexBufferFormat;
+        ID3D11InputLayout*          InputLayout;
+    };
+    BACKUP_DX11_STATE old;
+    old.ScissorRectsCount = old.ViewportsCount = D3D11_VIEWPORT_AND_SCISSORRECT_OBJECT_COUNT_PER_PIPELINE;
+    ctx->RSGetScissorRects(&old.ScissorRectsCount, old.ScissorRects);
+    ctx->RSGetViewports(&old.ViewportsCount, old.Viewports);
+    ctx->RSGetState(&old.RS);
+    ctx->OMGetBlendState(&old.BlendState, old.BlendFactor, &old.SampleMask);
+    ctx->OMGetDepthStencilState(&old.DepthStencilState, &old.StencilRef);
+    ctx->PSGetShaderResources(0, 1, &old.PSShaderResource);
+    ctx->PSGetSamplers(0, 1, &old.PSSampler);
+    old.PSInstancesCount = old.VSInstancesCount = 256;
+    ctx->PSGetShader(&old.PS, old.PSInstances, &old.PSInstancesCount);
+    ctx->VSGetShader(&old.VS, old.VSInstances, &old.VSInstancesCount);
+    ctx->VSGetConstantBuffers(0, 1, &old.VSConstantBuffer);
+    ctx->IAGetPrimitiveTopology(&old.PrimitiveTopology);
+    ctx->IAGetIndexBuffer(&old.IndexBuffer, &old.IndexBufferFormat, &old.IndexBufferOffset);
+    ctx->IAGetVertexBuffers(0, 1, &old.VertexBuffer, &old.VertexBufferStride, &old.VertexBufferOffset);
+    ctx->IAGetInputLayout(&old.InputLayout);
+
+    // Setup desired DX state
+    ImGui_ImplDX11_SetupRenderState(draw_data, ctx);
+
+    // Render command lists
+    // (Because we merged all buffers into a single one, we maintain our own offset into them)
+    int global_idx_offset = 0;
+    int global_vtx_offset = 0;
+    ImVec2 clip_off = draw_data->DisplayPos;
+    for (int n = 0; n < draw_data->CmdListsCount; n++)
+    {
+        const ImDrawList* cmd_list = draw_data->CmdLists[n];
+        for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.Size; cmd_i++)
+        {
+            const ImDrawCmd* pcmd = &cmd_list->CmdBuffer[cmd_i];
+            if (pcmd->UserCallback != NULL)
+            {
+                // User callback, registered via ImDrawList::AddCallback()
+                // (ImDrawCallback_ResetRenderState is a special callback value used by the user to request the renderer to reset render state.)
+                if (pcmd->UserCallback == ImDrawCallback_ResetRenderState)
+                    ImGui_ImplDX11_SetupRenderState(draw_data, ctx);
+                else
+                    pcmd->UserCallback(cmd_list, pcmd);
+            }
+            else
+            {
+                // Apply scissor/clipping rectangle
+                const D3D11_RECT r = { (LONG)(pcmd->ClipRect.x - clip_off.x), (LONG)(pcmd->ClipRect.y - clip_off.y), (LONG)(pcmd->ClipRect.z - clip_off.x), (LONG)(pcmd->ClipRect.w - clip_off.y) };
+                ctx->RSSetScissorRects(1, &r);
+
+                // Bind texture, Draw
+                ID3D11ShaderResourceView* texture_srv = (ID3D11ShaderResourceView*)pcmd->TextureId;
+                ctx->PSSetShaderResources(0, 1, &texture_srv);
+                ctx->DrawIndexed(pcmd->ElemCount, pcmd->IdxOffset + global_idx_offset, pcmd->VtxOffset + global_vtx_offset);
+            }
+        }
+        global_idx_offset += cmd_list->IdxBuffer.Size;
+        global_vtx_offset += cmd_list->VtxBuffer.Size;
+    }
+
+    // Restore modified DX state
+    ctx->RSSetScissorRects(old.ScissorRectsCount, old.ScissorRects);
+    ctx->RSSetViewports(old.ViewportsCount, old.Viewports);
+    ctx->RSSetState(old.RS); if (old.RS) old.RS->Release();
+    ctx->OMSetBlendState(old.BlendState, old.BlendFactor, old.SampleMask); if (old.BlendState) old.BlendState->Release();
+    ctx->OMSetDepthStencilState(old.DepthStencilState, old.StencilRef); if (old.DepthStencilState) old.DepthStencilState->Release();
+    ctx->PSSetShaderResources(0, 1, &old.PSShaderResource); if (old.PSShaderResource) old.PSShaderResource->Release();
+    ctx->PSSetSamplers(0, 1, &old.PSSampler); if (old.PSSampler) old.PSSampler->Release();
+    ctx->PSSetShader(old.PS, old.PSInstances, old.PSInstancesCount); if (old.PS) old.PS->Release();
+    for (UINT i = 0; i < old.PSInstancesCount; i++) if (old.PSInstances[i]) old.PSInstances[i]->Release();
+    ctx->VSSetShader(old.VS, old.VSInstances, old.VSInstancesCount); if (old.VS) old.VS->Release();
+    ctx->VSSetConstantBuffers(0, 1, &old.VSConstantBuffer); if (old.VSConstantBuffer) old.VSConstantBuffer->Release();
+    for (UINT i = 0; i < old.VSInstancesCount; i++) if (old.VSInstances[i]) old.VSInstances[i]->Release();
+    ctx->IASetPrimitiveTopology(old.PrimitiveTopology);
+    ctx->IASetIndexBuffer(old.IndexBuffer, old.IndexBufferFormat, old.IndexBufferOffset); if (old.IndexBuffer) old.IndexBuffer->Release();
+    ctx->IASetVertexBuffers(0, 1, &old.VertexBuffer, &old.VertexBufferStride, &old.VertexBufferOffset); if (old.VertexBuffer) old.VertexBuffer->Release();
+    ctx->IASetInputLayout(old.InputLayout); if (old.InputLayout) old.InputLayout->Release();
+}
+
+static void ImGui_ImplDX11_CreateFontsTexture()
+{
+    // Build texture atlas
+    ImGuiIO& io = ImGui::GetIO();
+    unsigned char* pixels;
+    int width, height;
+    io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height);
+
+    // Upload texture to graphics system
+    {
+        D3D11_TEXTURE2D_DESC desc;
+        ZeroMemory(&desc, sizeof(desc));
+        desc.Width = width;
+        desc.Height = height;
+        desc.MipLevels = 1;
+        desc.ArraySize = 1;
+        desc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
+        desc.SampleDesc.Count = 1;
+        desc.Usage = D3D11_USAGE_DEFAULT;
+        desc.BindFlags = D3D11_BIND_SHADER_RESOURCE;
+        desc.CPUAccessFlags = 0;
+
+        ID3D11Texture2D *pTexture = NULL;
+        D3D11_SUBRESOURCE_DATA subResource;
+        subResource.pSysMem = pixels;
+        subResource.SysMemPitch = desc.Width * 4;
+        subResource.SysMemSlicePitch = 0;
+        g_pd3dDevice->CreateTexture2D(&desc, &subResource, &pTexture);
+
+        // Create texture view
+        D3D11_SHADER_RESOURCE_VIEW_DESC srvDesc;
+        ZeroMemory(&srvDesc, sizeof(srvDesc));
+        srvDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
+        srvDesc.ViewDimension = D3D11_SRV_DIMENSION_TEXTURE2D;
+        srvDesc.Texture2D.MipLevels = desc.MipLevels;
+        srvDesc.Texture2D.MostDetailedMip = 0;
+        g_pd3dDevice->CreateShaderResourceView(pTexture, &srvDesc, &g_pFontTextureView);
+        pTexture->Release();
+    }
+
+    // Store our identifier
+    io.Fonts->TexID = (ImTextureID)g_pFontTextureView;
+
+    // Create texture sampler
+    {
+        D3D11_SAMPLER_DESC desc;
+        ZeroMemory(&desc, sizeof(desc));
+        desc.Filter = D3D11_FILTER_MIN_MAG_MIP_LINEAR;
+        desc.AddressU = D3D11_TEXTURE_ADDRESS_WRAP;
+        desc.AddressV = D3D11_TEXTURE_ADDRESS_WRAP;
+        desc.AddressW = D3D11_TEXTURE_ADDRESS_WRAP;
+        desc.MipLODBias = 0.f;
+        desc.ComparisonFunc = D3D11_COMPARISON_ALWAYS;
+        desc.MinLOD = 0.f;
+        desc.MaxLOD = 0.f;
+        g_pd3dDevice->CreateSamplerState(&desc, &g_pFontSampler);
+    }
+}
+
+bool    ImGui_ImplDX11_CreateDeviceObjects()
+{
+    if (!g_pd3dDevice)
+        return false;
+    if (g_pFontSampler)
+        ImGui_ImplDX11_InvalidateDeviceObjects();
+
+    // By using D3DCompile() from <d3dcompiler.h> / d3dcompiler.lib, we introduce a dependency to a given version of d3dcompiler_XX.dll (see D3DCOMPILER_DLL_A)
+    // If you would like to use this DX11 sample code but remove this dependency you can:
+    //  1) compile once, save the compiled shader blobs into a file or source code and pass them to CreateVertexShader()/CreatePixelShader() [preferred solution]
+    //  2) use code to detect any version of the DLL and grab a pointer to D3DCompile from the DLL.
+    // See https://github.com/ocornut/imgui/pull/638 for sources and details.
+
+#ifdef USE_D3DCOMPILE
+    decltype(D3DCompile)* D3DCompile = load_d3dcompile();
+    if (D3DCompile == nullptr)
+        return false;
+#endif
+
+    // Create the vertex shader
+    {
+#ifdef USE_D3DCOMPILE
+        static const char* vertexShader =
+            "cbuffer vertexBuffer : register(b0) \
+            {\
+              float4x4 ProjectionMatrix; \
+            };\
+            struct VS_INPUT\
+            {\
+              float2 pos : POSITION;\
+              float4 col : COLOR0;\
+              float2 uv  : TEXCOORD0;\
+            };\
+            \
+            struct PS_INPUT\
+            {\
+              float4 pos : SV_POSITION;\
+              float4 col : COLOR0;\
+              float2 uv  : TEXCOORD0;\
+            };\
+            \
+            PS_INPUT main(VS_INPUT input)\
+            {\
+              PS_INPUT output;\
+              output.pos = mul( ProjectionMatrix, float4(input.pos.xy, 0.f, 1.f));\
+              output.col = input.col;\
+              output.uv  = input.uv;\
+              return output;\
+            }";
+
+        const char* target;
+        switch (g_pd3dDevice->GetFeatureLevel())
+        {
+        case D3D_FEATURE_LEVEL_9_1: target = "vs_4_0_level_9_1"; break;
+        case D3D_FEATURE_LEVEL_9_2: target = "vs_4_0_level_9_2"; break;
+        case D3D_FEATURE_LEVEL_9_3: target = "vs_4_0_level_9_3"; break;
+        case D3D_FEATURE_LEVEL_10_0: target = "vs_4_0"; break;
+        case D3D_FEATURE_LEVEL_10_1: target = "vs_4_1"; break;
+        case D3D_FEATURE_LEVEL_11_0: target = "vs_5_0"; break;
+        case D3D_FEATURE_LEVEL_11_1: target = "vs_5_0"; break;
+        default: target = "vs_4_0";
+        }
+
+        D3DCompile(vertexShader, strlen(vertexShader), NULL, NULL, NULL, "main", target, 0, 0, &g_pVertexShaderBlob, NULL);
+
+        if (g_pVertexShaderBlob == NULL) // NB: Pass ID3D10Blob* pErrorBlob to D3DCompile() to get error showing in (const char*)pErrorBlob->GetBufferPointer(). Make sure to Release() the blob!
+            return false;
+        if (g_pd3dDevice->CreateVertexShader((DWORD*)g_pVertexShaderBlob->GetBufferPointer(), g_pVertexShaderBlob->GetBufferSize(), NULL, &g_pVertexShader) != S_OK)
+            return false;
+#else
+
+        unsigned char* byteCode;
+        SIZE_T byteCodeSize;
+
+        switch (g_pd3dDevice->GetFeatureLevel())
+        {
+        case D3D_FEATURE_LEVEL_9_1:
+            byteCode = ImGui_vertexShaderDX11_9_1;
+            byteCodeSize = ImGui_vertexShaderDX11_9_1_len;
+            break;
+
+        case D3D_FEATURE_LEVEL_9_2:
+            byteCode = ImGui_vertexShaderDX11_9_2;
+            byteCodeSize = ImGui_vertexShaderDX11_9_2_len;
+            break;
+
+        case D3D_FEATURE_LEVEL_9_3:
+            byteCode = ImGui_vertexShaderDX11_9_3;
+            byteCodeSize = ImGui_vertexShaderDX11_9_3_len;
+            break;
+
+        case D3D_FEATURE_LEVEL_10_0:
+            byteCode = ImGui_vertexShaderDX11_10_0;
+            byteCodeSize = ImGui_vertexShaderDX11_10_0_len;
+            break;
+
+        case D3D_FEATURE_LEVEL_10_1:
+            byteCode = ImGui_vertexShaderDX11_10_1;
+            byteCodeSize = ImGui_vertexShaderDX11_10_1_len;
+            break;
+
+        case D3D_FEATURE_LEVEL_11_0:
+            byteCode = ImGui_vertexShaderDX11_11_0;
+            byteCodeSize = ImGui_vertexShaderDX11_11_0_len;
+            break;
+
+        case D3D_FEATURE_LEVEL_11_1:
+            byteCode = ImGui_vertexShaderDX11_11_1;
+            byteCodeSize = ImGui_vertexShaderDX11_11_1_len;
+            break;
+
+        default:
+            byteCode = ImGui_vertexShaderDX11;
+            byteCodeSize = ImGui_vertexShaderDX11_len;
+        }
+
+        auto x = g_pd3dDevice->CreateVertexShader(byteCode, byteCodeSize, NULL, &g_pVertexShader);
+        if (x != S_OK)
+            return false;
+#endif
+
+        // Create the input layout
+        D3D11_INPUT_ELEMENT_DESC local_layout[] =
+        {
+            { "POSITION", 0, DXGI_FORMAT_R32G32_FLOAT,   0, (UINT)(&((ImDrawVert*)0)->pos), D3D11_INPUT_PER_VERTEX_DATA, 0 },
+            { "TEXCOORD", 0, DXGI_FORMAT_R32G32_FLOAT,   0, (UINT)(&((ImDrawVert*)0)->uv),  D3D11_INPUT_PER_VERTEX_DATA, 0 },
+            { "COLOR",    0, DXGI_FORMAT_R8G8B8A8_UNORM, 0, (UINT)(&((ImDrawVert*)0)->col), D3D11_INPUT_PER_VERTEX_DATA, 0 },
+        };
+#ifdef USE_D3DCOMPILE
+        if (g_pd3dDevice->CreateInputLayout(local_layout, 3, g_pVertexShaderBlob->GetBufferPointer(), g_pVertexShaderBlob->GetBufferSize(), &g_pInputLayout) != S_OK)
+            return false;
+#else
+        if (g_pd3dDevice->CreateInputLayout(local_layout, 3, ImGui_vertexShaderDX11, ImGui_vertexShaderDX11_len, &g_pInputLayout) != S_OK)
+            return false;
+#endif
+
+        // Create the constant buffer
+        {
+            D3D11_BUFFER_DESC desc;
+            desc.ByteWidth = sizeof(VERTEX_CONSTANT_BUFFER);
+            desc.Usage = D3D11_USAGE_DYNAMIC;
+            desc.BindFlags = D3D11_BIND_CONSTANT_BUFFER;
+            desc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;
+            desc.MiscFlags = 0;
+            g_pd3dDevice->CreateBuffer(&desc, NULL, &g_pVertexConstantBuffer);
+        }
+    }
+
+    // Create the pixel shader
+    {
+#ifdef USE_D3DCOMPILE
+        static const char* pixelShader =
+            "struct PS_INPUT\
+            {\
+            float4 pos : SV_POSITION;\
+            float4 col : COLOR0;\
+            float2 uv  : TEXCOORD0;\
+            };\
+            sampler sampler0;\
+            Texture2D texture0;\
+            \
+            float4 main(PS_INPUT input) : SV_Target\
+            {\
+            float4 out_col = input.col * texture0.Sample(sampler0, input.uv); \
+            return out_col; \
+            }";
+
+        const char* target;
+        switch (g_pd3dDevice->GetFeatureLevel())
+        {
+        case D3D_FEATURE_LEVEL_9_1: target = "ps_4_0_level_9_1"; break;
+        case D3D_FEATURE_LEVEL_9_2: target = "ps_4_0_level_9_2"; break;
+        case D3D_FEATURE_LEVEL_9_3: target = "ps_4_0_level_9_3"; break;
+        case D3D_FEATURE_LEVEL_10_0: target = "ps_4_0"; break;
+        case D3D_FEATURE_LEVEL_10_1: target = "ps_4_1"; break;
+        case D3D_FEATURE_LEVEL_11_0: target = "ps_5_0"; break;
+        case D3D_FEATURE_LEVEL_11_1: target = "ps_5_0"; break;
+        default: target = "ps_4_0";
+        }
+
+        D3DCompile(pixelShader, strlen(pixelShader), NULL, NULL, NULL, "main", target, 0, 0, &g_pPixelShaderBlob, NULL);
+        if (g_pPixelShaderBlob == NULL)  // NB: Pass ID3D10Blob* pErrorBlob to D3DCompile() to get error showing in (const char*)pErrorBlob->GetBufferPointer(). Make sure to Release() the blob!
+            return false;
+        if (g_pd3dDevice->CreatePixelShader((DWORD*)g_pPixelShaderBlob->GetBufferPointer(), g_pPixelShaderBlob->GetBufferSize(), NULL, &g_pPixelShader) != S_OK)
+            return false;
+#else
+
+        unsigned char* byteCode;
+        SIZE_T byteCodeSize;
+
+        switch (g_pd3dDevice->GetFeatureLevel())
+        {
+        case D3D_FEATURE_LEVEL_9_1:
+            byteCode = ImGui_pixelShaderDX11_9_1;
+            byteCodeSize = ImGui_pixelShaderDX11_9_1_len;
+            break;
+
+        case D3D_FEATURE_LEVEL_9_2:
+            byteCode = ImGui_pixelShaderDX11_9_2;
+            byteCodeSize = ImGui_pixelShaderDX11_9_2_len;
+            break;
+
+        case D3D_FEATURE_LEVEL_9_3:
+            byteCode = ImGui_pixelShaderDX11_9_3;
+            byteCodeSize = ImGui_pixelShaderDX11_9_3_len;
+            break;
+
+        case D3D_FEATURE_LEVEL_10_0:
+            byteCode = ImGui_pixelShaderDX11_10_0;
+            byteCodeSize = ImGui_pixelShaderDX11_10_0_len;
+            break;
+
+        case D3D_FEATURE_LEVEL_10_1:
+            byteCode = ImGui_pixelShaderDX11_10_1;
+            byteCodeSize = ImGui_pixelShaderDX11_10_1_len;
+            break;
+
+        case D3D_FEATURE_LEVEL_11_0:
+            byteCode = ImGui_pixelShaderDX11_11_0;
+            byteCodeSize = ImGui_pixelShaderDX11_11_0_len;
+            break;
+
+        case D3D_FEATURE_LEVEL_11_1:
+            byteCode = ImGui_pixelShaderDX11_11_1;
+            byteCodeSize = ImGui_pixelShaderDX11_11_1_len;
+            break;
+
+        default:
+            byteCode = ImGui_pixelShaderDX11;
+            byteCodeSize = ImGui_pixelShaderDX11_len;
+        }
+
+        if (g_pd3dDevice->CreatePixelShader(byteCode, byteCodeSize, NULL, &g_pPixelShader) != S_OK)
+            return false;
+#endif
+    }
+
+#ifdef USE_D3DCOMPILE
+    unload_d3dcompile();
+#endif
+
+    // Create the blending setup
+    {
+        D3D11_BLEND_DESC desc;
+        ZeroMemory(&desc, sizeof(desc));
+        desc.AlphaToCoverageEnable = false;
+        desc.RenderTarget[0].BlendEnable = true;
+        desc.RenderTarget[0].SrcBlend = D3D11_BLEND_SRC_ALPHA;
+        desc.RenderTarget[0].DestBlend = D3D11_BLEND_INV_SRC_ALPHA;
+        desc.RenderTarget[0].BlendOp = D3D11_BLEND_OP_ADD;
+        desc.RenderTarget[0].SrcBlendAlpha = D3D11_BLEND_INV_SRC_ALPHA;
+        desc.RenderTarget[0].DestBlendAlpha = D3D11_BLEND_ZERO;
+        desc.RenderTarget[0].BlendOpAlpha = D3D11_BLEND_OP_ADD;
+        desc.RenderTarget[0].RenderTargetWriteMask = D3D11_COLOR_WRITE_ENABLE_ALL;
+        g_pd3dDevice->CreateBlendState(&desc, &g_pBlendState);
+    }
+
+    // Create the rasterizer state
+    {
+        D3D11_RASTERIZER_DESC desc;
+        ZeroMemory(&desc, sizeof(desc));
+        desc.FillMode = D3D11_FILL_SOLID;
+        desc.CullMode = D3D11_CULL_NONE;
+        desc.ScissorEnable = true;
+        desc.DepthClipEnable = true;
+        g_pd3dDevice->CreateRasterizerState(&desc, &g_pRasterizerState);
+    }
+
+    // Create depth-stencil State
+    {
+        D3D11_DEPTH_STENCIL_DESC desc;
+        ZeroMemory(&desc, sizeof(desc));
+        desc.DepthEnable = false;
+        desc.DepthWriteMask = D3D11_DEPTH_WRITE_MASK_ALL;
+        desc.DepthFunc = D3D11_COMPARISON_ALWAYS;
+        desc.StencilEnable = false;
+        desc.FrontFace.StencilFailOp = desc.FrontFace.StencilDepthFailOp = desc.FrontFace.StencilPassOp = D3D11_STENCIL_OP_KEEP;
+        desc.FrontFace.StencilFunc = D3D11_COMPARISON_ALWAYS;
+        desc.BackFace = desc.FrontFace;
+        g_pd3dDevice->CreateDepthStencilState(&desc, &g_pDepthStencilState);
+    }
+
+    ImGui_ImplDX11_CreateFontsTexture();
+
+    return true;
+}
+
+void    ImGui_ImplDX11_InvalidateDeviceObjects()
+{
+    if (!g_pd3dDevice)
+        return;
+
+    if (g_pFontSampler) { g_pFontSampler->Release(); g_pFontSampler = NULL; }
+    if (g_pFontTextureView) { g_pFontTextureView->Release(); g_pFontTextureView = NULL; ImGui::GetIO().Fonts->TexID = NULL; } // We copied g_pFontTextureView to io.Fonts->TexID so let's clear that as well.
+    if (g_pIB) { g_pIB->Release(); g_pIB = NULL; }
+    if (g_pVB) { g_pVB->Release(); g_pVB = NULL; }
+
+    if (g_pBlendState) { g_pBlendState->Release(); g_pBlendState = NULL; }
+    if (g_pDepthStencilState) { g_pDepthStencilState->Release(); g_pDepthStencilState = NULL; }
+    if (g_pRasterizerState) { g_pRasterizerState->Release(); g_pRasterizerState = NULL; }
+    if (g_pPixelShader) { g_pPixelShader->Release(); g_pPixelShader = NULL; }
+    if (g_pVertexConstantBuffer) { g_pVertexConstantBuffer->Release(); g_pVertexConstantBuffer = NULL; }
+    if (g_pInputLayout) { g_pInputLayout->Release(); g_pInputLayout = NULL; }
+    if (g_pVertexShader) { g_pVertexShader->Release(); g_pVertexShader = NULL; }
+#ifdef USE_D3DCOMPILE
+    if (g_pPixelShaderBlob) { g_pPixelShaderBlob->Release(); g_pPixelShaderBlob = NULL; }
+    if (g_pVertexShaderBlob) { g_pVertexShaderBlob->Release(); g_pVertexShaderBlob = NULL; }
+#endif
+}
+
+bool    ImGui_ImplDX11_Init(ID3D11Device* device, ID3D11DeviceContext* device_context)
+{
+    // Setup back-end capabilities flags
+    ImGuiIO& io = ImGui::GetIO();
+    io.BackendRendererName = "imgui_impl_dx11";
+    io.BackendFlags |= ImGuiBackendFlags_RendererHasVtxOffset;  // We can honor the ImDrawCmd::VtxOffset field, allowing for large meshes.
+
+    // Get factory from device
+    IDXGIDevice* pDXGIDevice = NULL;
+    IDXGIAdapter* pDXGIAdapter = NULL;
+    IDXGIFactory* pFactory = NULL;
+
+    if (device->QueryInterface(IID_PPV_ARGS(&pDXGIDevice)) == S_OK)
+        if (pDXGIDevice->GetParent(IID_PPV_ARGS(&pDXGIAdapter)) == S_OK)
+            if (pDXGIAdapter->GetParent(IID_PPV_ARGS(&pFactory)) == S_OK)
+            {
+                g_pd3dDevice = device;
+                g_pd3dDeviceContext = device_context;
+                g_pFactory = pFactory;
+            }
+    if (pDXGIDevice) pDXGIDevice->Release();
+    if (pDXGIAdapter) pDXGIAdapter->Release();
+    g_pd3dDevice->AddRef();
+    g_pd3dDeviceContext->AddRef();
+
+    return true;
+}
+
+void ImGui_ImplDX11_Shutdown()
+{
+    ImGui_ImplDX11_InvalidateDeviceObjects();
+    if (g_pFactory) { g_pFactory->Release(); g_pFactory = NULL; }
+    if (g_pd3dDevice) { g_pd3dDevice->Release(); g_pd3dDevice = NULL; }
+    if (g_pd3dDeviceContext) { g_pd3dDeviceContext->Release(); g_pd3dDeviceContext = NULL; }
+}
+
+bool ImGui_ImplDX11_NewFrame()
+{
+    if (!g_pFontSampler)
+        return ImGui_ImplDX11_CreateDeviceObjects();
+
+    return true;
+}

ImGui/impls/windows/imgui_impl_dx11.h

@@ -0,0 +1,24 @@
+// dear imgui: Renderer for DirectX11
+// This needs to be used along with a Platform Binding (e.g. Win32)
+
+// Implemented features:
+//  [X] Renderer: User texture binding. Use 'ID3D11ShaderResourceView*' as ImTextureID. Read the FAQ about ImTextureID in imgui.cpp.
+//  [X] Renderer: Support for large meshes (64k+ vertices) with 16-bits indices.
+
+// You can copy and use unmodified imgui_impl_* files in your project. See main.cpp for an example of using this.
+// If you are new to dear imgui, read examples/README.txt and read the documentation at the top of imgui.cpp.
+// https://github.com/ocornut/imgui
+
+#pragma once
+
+struct ID3D11Device;
+struct ID3D11DeviceContext;
+
+IMGUI_IMPL_API bool     ImGui_ImplDX11_Init(ID3D11Device* device, ID3D11DeviceContext* device_context);
+IMGUI_IMPL_API void     ImGui_ImplDX11_Shutdown();
+IMGUI_IMPL_API bool     ImGui_ImplDX11_NewFrame();
+IMGUI_IMPL_API void     ImGui_ImplDX11_RenderDrawData(ImDrawData* draw_data);
+
+// Use if you want to reset your rendering device without losing ImGui state.
+IMGUI_IMPL_API void     ImGui_ImplDX11_InvalidateDeviceObjects();
+IMGUI_IMPL_API bool     ImGui_ImplDX11_CreateDeviceObjects();

ImGui/impls/windows/imgui_impl_dx12.cpp

@@ -0,0 +1,677 @@
+// dear imgui: Renderer for DirectX12
+// This needs to be used along with a Platform Binding (e.g. Win32)
+
+// Implemented features:
+//  [X] Renderer: User texture binding. Use 'D3D12_GPU_DESCRIPTOR_HANDLE' as ImTextureID. Read the FAQ about ImTextureID in imgui.cpp.
+//  [X] Renderer: Support for large meshes (64k+ vertices) with 16-bits indices.
+// Issues:
+//  [ ] 64-bit only for now! (Because sizeof(ImTextureId) == sizeof(void*)). See github.com/ocornut/imgui/pull/301
+
+// You can copy and use unmodified imgui_impl_* files in your project. See main.cpp for an example of using this.
+// If you are new to dear imgui, read examples/README.txt and read the documentation at the top of imgui.cpp.
+// https://github.com/ocornut/imgui
+
+// CHANGELOG
+// (minor and older changes stripped away, please see git history for details)
+//  2019-05-29: DirectX12: Added support for large mesh (64K+ vertices), enable ImGuiBackendFlags_RendererHasVtxOffset flag.
+//  2019-04-30: DirectX12: Added support for special ImDrawCallback_ResetRenderState callback to reset render state.
+//  2019-03-29: Misc: Various minor tidying up.
+//  2018-12-03: Misc: Added #pragma comment statement to automatically link with d3dcompiler.lib when using D3DCompile().
+//  2018-11-30: Misc: Setting up io.BackendRendererName so it can be displayed in the About Window.
+//  2018-06-12: DirectX12: Moved the ID3D12GraphicsCommandList* parameter from NewFrame() to RenderDrawData().
+//  2018-06-08: Misc: Extracted imgui_impl_dx12.cpp/.h away from the old combined DX12+Win32 example.
+//  2018-06-08: DirectX12: Use draw_data->DisplayPos and draw_data->DisplaySize to setup projection matrix and clipping rectangle (to ease support for future multi-viewport).
+//  2018-02-22: Merged into master with all Win32 code synchronized to other examples.
+
+#include "../../imgui.h"
+#include "imgui_impl_dx12.h"
+
+// DirectX
+#include <d3d12.h>
+#include <dxgi1_4.h>
+
+#include "../../../overlay_experimental/windows/ImGui_ShaderBlobs.h"
+
+#ifdef USE_D3DCOMPILE
+static ID3DBlob* g_pVertexShaderBlob = NULL;
+static ID3DBlob* g_pPixelShaderBlob = NULL;
+#endif
+
+// DirectX data
+static ID3D12Device*                g_pd3dDevice = NULL;
+static ID3D12RootSignature*         g_pRootSignature = NULL;
+static ID3D12PipelineState*         g_pPipelineState = NULL;
+static DXGI_FORMAT                  g_RTVFormat = DXGI_FORMAT_UNKNOWN;
+static ID3D12Resource*              g_pFontTextureResource = NULL;
+static D3D12_CPU_DESCRIPTOR_HANDLE  g_hFontSrvCpuDescHandle = {};
+static D3D12_GPU_DESCRIPTOR_HANDLE  g_hFontSrvGpuDescHandle = {};
+
+struct FrameResources
+{
+    ID3D12Resource*     IndexBuffer;
+    ID3D12Resource*     VertexBuffer;
+    int                 IndexBufferSize;
+    int                 VertexBufferSize;
+};
+static FrameResources*  g_pFrameResources = NULL;
+static UINT             g_numFramesInFlight = 0;
+static UINT             g_frameIndex = UINT_MAX;
+
+struct VERTEX_CONSTANT_BUFFER
+{
+    float   mvp[4][4];
+};
+
+static void ImGui_ImplDX12_SetupRenderState(ImDrawData* draw_data, ID3D12GraphicsCommandList* ctx, FrameResources* fr)
+{
+    // Setup orthographic projection matrix into our constant buffer
+    // Our visible imgui space lies from draw_data->DisplayPos (top left) to draw_data->DisplayPos+data_data->DisplaySize (bottom right).
+    VERTEX_CONSTANT_BUFFER vertex_constant_buffer;
+    {
+        float L = draw_data->DisplayPos.x;
+        float R = draw_data->DisplayPos.x + draw_data->DisplaySize.x;
+        float T = draw_data->DisplayPos.y;
+        float B = draw_data->DisplayPos.y + draw_data->DisplaySize.y;
+        float mvp[4][4] =
+        {
+            { 2.0f/(R-L),   0.0f,           0.0f,       0.0f },
+            { 0.0f,         2.0f/(T-B),     0.0f,       0.0f },
+            { 0.0f,         0.0f,           0.5f,       0.0f },
+            { (R+L)/(L-R),  (T+B)/(B-T),    0.5f,       1.0f },
+        };
+        memcpy(&vertex_constant_buffer.mvp, mvp, sizeof(mvp));
+    }
+
+    // Setup viewport
+    D3D12_VIEWPORT vp;
+    memset(&vp, 0, sizeof(D3D12_VIEWPORT));
+    vp.Width = draw_data->DisplaySize.x;
+    vp.Height = draw_data->DisplaySize.y;
+    vp.MinDepth = 0.0f;
+    vp.MaxDepth = 1.0f;
+    vp.TopLeftX = vp.TopLeftY = 0.0f;
+    ctx->RSSetViewports(1, &vp);
+
+    // Bind shader and vertex buffers
+    unsigned int stride = sizeof(ImDrawVert);
+    unsigned int offset = 0;
+    D3D12_VERTEX_BUFFER_VIEW vbv;
+    memset(&vbv, 0, sizeof(D3D12_VERTEX_BUFFER_VIEW));
+    vbv.BufferLocation = fr->VertexBuffer->GetGPUVirtualAddress() + offset;
+    vbv.SizeInBytes = fr->VertexBufferSize * stride;
+    vbv.StrideInBytes = stride;
+    ctx->IASetVertexBuffers(0, 1, &vbv);
+    D3D12_INDEX_BUFFER_VIEW ibv;
+    memset(&ibv, 0, sizeof(D3D12_INDEX_BUFFER_VIEW));
+    ibv.BufferLocation = fr->IndexBuffer->GetGPUVirtualAddress();
+    ibv.SizeInBytes = fr->IndexBufferSize * sizeof(ImDrawIdx);
+    ibv.Format = sizeof(ImDrawIdx) == 2 ? DXGI_FORMAT_R16_UINT : DXGI_FORMAT_R32_UINT;
+    ctx->IASetIndexBuffer(&ibv);
+    ctx->IASetPrimitiveTopology(D3D_PRIMITIVE_TOPOLOGY_TRIANGLELIST);
+    ctx->SetPipelineState(g_pPipelineState);
+    ctx->SetGraphicsRootSignature(g_pRootSignature);
+    ctx->SetGraphicsRoot32BitConstants(0, 16, &vertex_constant_buffer, 0);
+
+    // Setup blend factor
+    const float blend_factor[4] = { 0.f, 0.f, 0.f, 0.f };
+    ctx->OMSetBlendFactor(blend_factor);
+}
+
+// Render function
+// (this used to be set in io.RenderDrawListsFn and called by ImGui::Render(), but you can now call this directly from your main loop)
+void ImGui_ImplDX12_RenderDrawData(ImDrawData* draw_data, ID3D12GraphicsCommandList* ctx)
+{
+    // Avoid rendering when minimized
+    if (draw_data->DisplaySize.x <= 0.0f || draw_data->DisplaySize.y <= 0.0f)
+        return;
+
+    // FIXME: I'm assuming that this only gets called once per frame!
+    // If not, we can't just re-allocate the IB or VB, we'll have to do a proper allocator.
+    g_frameIndex = g_frameIndex + 1;
+    FrameResources* fr = &g_pFrameResources[g_frameIndex % g_numFramesInFlight];
+
+    // Create and grow vertex/index buffers if needed
+    if (fr->VertexBuffer == NULL || fr->VertexBufferSize < draw_data->TotalVtxCount)
+    {
+        if (fr->VertexBuffer != NULL) { fr->VertexBuffer->Release(); fr->VertexBuffer = NULL; }
+        fr->VertexBufferSize = draw_data->TotalVtxCount + 5000;
+        D3D12_HEAP_PROPERTIES props;
+        memset(&props, 0, sizeof(D3D12_HEAP_PROPERTIES));
+        props.Type = D3D12_HEAP_TYPE_UPLOAD;
+        props.CPUPageProperty = D3D12_CPU_PAGE_PROPERTY_UNKNOWN;
+        props.MemoryPoolPreference = D3D12_MEMORY_POOL_UNKNOWN;
+        D3D12_RESOURCE_DESC desc;
+        memset(&desc, 0, sizeof(D3D12_RESOURCE_DESC));
+        desc.Dimension = D3D12_RESOURCE_DIMENSION_BUFFER;
+        desc.Width = fr->VertexBufferSize * sizeof(ImDrawVert);
+        desc.Height = 1;
+        desc.DepthOrArraySize = 1;
+        desc.MipLevels = 1;
+        desc.Format = DXGI_FORMAT_UNKNOWN;
+        desc.SampleDesc.Count = 1;
+        desc.Layout = D3D12_TEXTURE_LAYOUT_ROW_MAJOR;
+        desc.Flags = D3D12_RESOURCE_FLAG_NONE;
+        if (g_pd3dDevice->CreateCommittedResource(&props, D3D12_HEAP_FLAG_NONE, &desc, D3D12_RESOURCE_STATE_GENERIC_READ, NULL, IID_PPV_ARGS(&fr->VertexBuffer)) < 0)
+            return;
+    }
+    if (fr->IndexBuffer == NULL || fr->IndexBufferSize < draw_data->TotalIdxCount)
+    {
+        if (fr->IndexBuffer != NULL) { fr->IndexBuffer->Release(); fr->IndexBuffer = NULL; }
+        fr->IndexBufferSize = draw_data->TotalIdxCount + 10000;
+        D3D12_HEAP_PROPERTIES props;
+        memset(&props, 0, sizeof(D3D12_HEAP_PROPERTIES));
+        props.Type = D3D12_HEAP_TYPE_UPLOAD;
+        props.CPUPageProperty = D3D12_CPU_PAGE_PROPERTY_UNKNOWN;
+        props.MemoryPoolPreference = D3D12_MEMORY_POOL_UNKNOWN;
+        D3D12_RESOURCE_DESC desc;
+        memset(&desc, 0, sizeof(D3D12_RESOURCE_DESC));
+        desc.Dimension = D3D12_RESOURCE_DIMENSION_BUFFER;
+        desc.Width = fr->IndexBufferSize * sizeof(ImDrawIdx);
+        desc.Height = 1;
+        desc.DepthOrArraySize = 1;
+        desc.MipLevels = 1;
+        desc.Format = DXGI_FORMAT_UNKNOWN;
+        desc.SampleDesc.Count = 1;
+        desc.Layout = D3D12_TEXTURE_LAYOUT_ROW_MAJOR;
+        desc.Flags = D3D12_RESOURCE_FLAG_NONE;
+        if (g_pd3dDevice->CreateCommittedResource(&props, D3D12_HEAP_FLAG_NONE, &desc, D3D12_RESOURCE_STATE_GENERIC_READ, NULL, IID_PPV_ARGS(&fr->IndexBuffer)) < 0)
+            return;
+    }
+
+    // Upload vertex/index data into a single contiguous GPU buffer
+    void* vtx_resource, *idx_resource;
+    D3D12_RANGE range;
+    memset(&range, 0, sizeof(D3D12_RANGE));
+    if (fr->VertexBuffer->Map(0, &range, &vtx_resource) != S_OK)
+        return;
+    if (fr->IndexBuffer->Map(0, &range, &idx_resource) != S_OK)
+        return;
+    ImDrawVert* vtx_dst = (ImDrawVert*)vtx_resource;
+    ImDrawIdx* idx_dst = (ImDrawIdx*)idx_resource;
+    for (int n = 0; n < draw_data->CmdListsCount; n++)
+    {
+        const ImDrawList* cmd_list = draw_data->CmdLists[n];
+        memcpy(vtx_dst, cmd_list->VtxBuffer.Data, cmd_list->VtxBuffer.Size * sizeof(ImDrawVert));
+        memcpy(idx_dst, cmd_list->IdxBuffer.Data, cmd_list->IdxBuffer.Size * sizeof(ImDrawIdx));
+        vtx_dst += cmd_list->VtxBuffer.Size;
+        idx_dst += cmd_list->IdxBuffer.Size;
+    }
+    fr->VertexBuffer->Unmap(0, &range);
+    fr->IndexBuffer->Unmap(0, &range);
+
+    // Setup desired DX state
+    ImGui_ImplDX12_SetupRenderState(draw_data, ctx, fr);
+
+    // Render command lists
+    // (Because we merged all buffers into a single one, we maintain our own offset into them)
+    int global_vtx_offset = 0;
+    int global_idx_offset = 0;
+    ImVec2 clip_off = draw_data->DisplayPos;
+    for (int n = 0; n < draw_data->CmdListsCount; n++)
+    {
+        const ImDrawList* cmd_list = draw_data->CmdLists[n];
+        for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.Size; cmd_i++)
+        {
+            const ImDrawCmd* pcmd = &cmd_list->CmdBuffer[cmd_i];
+            if (pcmd->UserCallback != NULL)
+            {
+                // User callback, registered via ImDrawList::AddCallback()
+                // (ImDrawCallback_ResetRenderState is a special callback value used by the user to request the renderer to reset render state.)
+                if (pcmd->UserCallback == ImDrawCallback_ResetRenderState)
+                    ImGui_ImplDX12_SetupRenderState(draw_data, ctx, fr);
+                else
+                    pcmd->UserCallback(cmd_list, pcmd);
+            }
+            else
+            {
+                // Apply Scissor, Bind texture, Draw
+                const D3D12_RECT r = { (LONG)(pcmd->ClipRect.x - clip_off.x), (LONG)(pcmd->ClipRect.y - clip_off.y), (LONG)(pcmd->ClipRect.z - clip_off.x), (LONG)(pcmd->ClipRect.w - clip_off.y) };
+                ctx->SetGraphicsRootDescriptorTable(1, *(D3D12_GPU_DESCRIPTOR_HANDLE*)&pcmd->TextureId);
+                ctx->RSSetScissorRects(1, &r);
+                ctx->DrawIndexedInstanced(pcmd->ElemCount, 1, pcmd->IdxOffset + global_idx_offset, pcmd->VtxOffset + global_vtx_offset, 0);
+            }
+        }
+        global_idx_offset += cmd_list->IdxBuffer.Size;
+        global_vtx_offset += cmd_list->VtxBuffer.Size;
+    }
+}
+
+static void ImGui_ImplDX12_CreateFontsTexture()
+{
+    // Build texture atlas
+    ImGuiIO& io = ImGui::GetIO();
+    unsigned char* pixels;
+    int width, height;
+    io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height);
+
+    // Upload texture to graphics system
+    {
+        D3D12_HEAP_PROPERTIES props;
+        memset(&props, 0, sizeof(D3D12_HEAP_PROPERTIES));
+        props.Type = D3D12_HEAP_TYPE_DEFAULT;
+        props.CPUPageProperty = D3D12_CPU_PAGE_PROPERTY_UNKNOWN;
+        props.MemoryPoolPreference = D3D12_MEMORY_POOL_UNKNOWN;
+
+        D3D12_RESOURCE_DESC desc;
+        ZeroMemory(&desc, sizeof(desc));
+        desc.Dimension = D3D12_RESOURCE_DIMENSION_TEXTURE2D;
+        desc.Alignment = 0;
+        desc.Width = width;
+        desc.Height = height;
+        desc.DepthOrArraySize = 1;
+        desc.MipLevels = 1;
+        desc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
+        desc.SampleDesc.Count = 1;
+        desc.SampleDesc.Quality = 0;
+        desc.Layout = D3D12_TEXTURE_LAYOUT_UNKNOWN;
+        desc.Flags = D3D12_RESOURCE_FLAG_NONE;
+
+        ID3D12Resource* pTexture = NULL;
+        g_pd3dDevice->CreateCommittedResource(&props, D3D12_HEAP_FLAG_NONE, &desc,
+            D3D12_RESOURCE_STATE_COPY_DEST, NULL, IID_PPV_ARGS(&pTexture));
+
+        UINT uploadPitch = (width * 4 + D3D12_TEXTURE_DATA_PITCH_ALIGNMENT - 1u) & ~(D3D12_TEXTURE_DATA_PITCH_ALIGNMENT - 1u);
+        UINT uploadSize = height * uploadPitch;
+        desc.Dimension = D3D12_RESOURCE_DIMENSION_BUFFER;
+        desc.Alignment = 0;
+        desc.Width = uploadSize;
+        desc.Height = 1;
+        desc.DepthOrArraySize = 1;
+        desc.MipLevels = 1;
+        desc.Format = DXGI_FORMAT_UNKNOWN;
+        desc.SampleDesc.Count = 1;
+        desc.SampleDesc.Quality = 0;
+        desc.Layout = D3D12_TEXTURE_LAYOUT_ROW_MAJOR;
+        desc.Flags = D3D12_RESOURCE_FLAG_NONE;
+
+        props.Type = D3D12_HEAP_TYPE_UPLOAD;
+        props.CPUPageProperty = D3D12_CPU_PAGE_PROPERTY_UNKNOWN;
+        props.MemoryPoolPreference = D3D12_MEMORY_POOL_UNKNOWN;
+
+        ID3D12Resource* uploadBuffer = NULL;
+        HRESULT hr = g_pd3dDevice->CreateCommittedResource(&props, D3D12_HEAP_FLAG_NONE, &desc,
+            D3D12_RESOURCE_STATE_GENERIC_READ, NULL, IID_PPV_ARGS(&uploadBuffer));
+        IM_ASSERT(SUCCEEDED(hr));
+
+        void* mapped = NULL;
+        D3D12_RANGE range = { 0, uploadSize };
+        hr = uploadBuffer->Map(0, &range, &mapped);
+        IM_ASSERT(SUCCEEDED(hr));
+        for (int y = 0; y < height; y++)
+            memcpy((void*) ((uintptr_t) mapped + y * uploadPitch), pixels + y * width * 4, width * 4);
+        uploadBuffer->Unmap(0, &range);
+
+        D3D12_TEXTURE_COPY_LOCATION srcLocation = {};
+        srcLocation.pResource = uploadBuffer;
+        srcLocation.Type = D3D12_TEXTURE_COPY_TYPE_PLACED_FOOTPRINT;
+        srcLocation.PlacedFootprint.Footprint.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
+        srcLocation.PlacedFootprint.Footprint.Width = width;
+        srcLocation.PlacedFootprint.Footprint.Height = height;
+        srcLocation.PlacedFootprint.Footprint.Depth = 1;
+        srcLocation.PlacedFootprint.Footprint.RowPitch = uploadPitch;
+
+        D3D12_TEXTURE_COPY_LOCATION dstLocation = {};
+        dstLocation.pResource = pTexture;
+        dstLocation.Type = D3D12_TEXTURE_COPY_TYPE_SUBRESOURCE_INDEX;
+        dstLocation.SubresourceIndex = 0;
+
+        D3D12_RESOURCE_BARRIER barrier = {};
+        barrier.Type = D3D12_RESOURCE_BARRIER_TYPE_TRANSITION;
+        barrier.Flags = D3D12_RESOURCE_BARRIER_FLAG_NONE;
+        barrier.Transition.pResource   = pTexture;
+        barrier.Transition.Subresource = D3D12_RESOURCE_BARRIER_ALL_SUBRESOURCES;
+        barrier.Transition.StateBefore = D3D12_RESOURCE_STATE_COPY_DEST;
+        barrier.Transition.StateAfter  = D3D12_RESOURCE_STATE_PIXEL_SHADER_RESOURCE;
+
+        ID3D12Fence* fence = NULL;
+        hr = g_pd3dDevice->CreateFence(0, D3D12_FENCE_FLAG_NONE, IID_PPV_ARGS(&fence));
+        IM_ASSERT(SUCCEEDED(hr));
+
+        HANDLE event = CreateEvent(0, 0, 0, 0);
+        IM_ASSERT(event != NULL);
+
+        D3D12_COMMAND_QUEUE_DESC queueDesc = {};
+        queueDesc.Type     = D3D12_COMMAND_LIST_TYPE_DIRECT;
+        queueDesc.Flags    = D3D12_COMMAND_QUEUE_FLAG_NONE;
+        queueDesc.NodeMask = 1;
+
+        ID3D12CommandQueue* cmdQueue = NULL;
+        hr = g_pd3dDevice->CreateCommandQueue(&queueDesc, IID_PPV_ARGS(&cmdQueue));
+        IM_ASSERT(SUCCEEDED(hr));
+
+        ID3D12CommandAllocator* cmdAlloc = NULL;
+        hr = g_pd3dDevice->CreateCommandAllocator(D3D12_COMMAND_LIST_TYPE_DIRECT, IID_PPV_ARGS(&cmdAlloc));
+        IM_ASSERT(SUCCEEDED(hr));
+
+        ID3D12GraphicsCommandList* cmdList = NULL;
+        hr = g_pd3dDevice->CreateCommandList(0, D3D12_COMMAND_LIST_TYPE_DIRECT, cmdAlloc, NULL, IID_PPV_ARGS(&cmdList));
+        IM_ASSERT(SUCCEEDED(hr));
+
+        cmdList->CopyTextureRegion(&dstLocation, 0, 0, 0, &srcLocation, NULL);
+        cmdList->ResourceBarrier(1, &barrier);
+
+        hr = cmdList->Close();
+        IM_ASSERT(SUCCEEDED(hr));
+
+        cmdQueue->ExecuteCommandLists(1, (ID3D12CommandList* const*) &cmdList);
+        hr = cmdQueue->Signal(fence, 1);
+        IM_ASSERT(SUCCEEDED(hr));
+
+        fence->SetEventOnCompletion(1, event);
+        WaitForSingleObject(event, INFINITE);
+
+        cmdList->Release();
+        cmdAlloc->Release();
+        cmdQueue->Release();
+        CloseHandle(event);
+        fence->Release();
+        uploadBuffer->Release();
+
+        // Create texture view
+        D3D12_SHADER_RESOURCE_VIEW_DESC srvDesc;
+        ZeroMemory(&srvDesc, sizeof(srvDesc));
+        srvDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
+        srvDesc.ViewDimension = D3D12_SRV_DIMENSION_TEXTURE2D;
+        srvDesc.Texture2D.MipLevels = desc.MipLevels;
+        srvDesc.Texture2D.MostDetailedMip = 0;
+        srvDesc.Shader4ComponentMapping = D3D12_DEFAULT_SHADER_4_COMPONENT_MAPPING;
+        g_pd3dDevice->CreateShaderResourceView(pTexture, &srvDesc, g_hFontSrvCpuDescHandle);
+        if (g_pFontTextureResource != NULL)
+            g_pFontTextureResource->Release();
+        g_pFontTextureResource = pTexture;
+    }
+
+    // Store our identifier
+    static_assert(sizeof(ImTextureID) >= sizeof(g_hFontSrvGpuDescHandle.ptr), "Can't pack descriptor handle into TexID, 32-bit not supported yet.");
+    io.Fonts->TexID = (ImTextureID)g_hFontSrvGpuDescHandle.ptr;
+}
+
+bool    ImGui_ImplDX12_CreateDeviceObjects()
+{
+    if (!g_pd3dDevice)
+        return false;
+    if (g_pPipelineState)
+        ImGui_ImplDX12_InvalidateDeviceObjects();
+
+    // Create the root signature
+    {
+        D3D12_DESCRIPTOR_RANGE descRange = {};
+        descRange.RangeType = D3D12_DESCRIPTOR_RANGE_TYPE_SRV;
+        descRange.NumDescriptors = 1;
+        descRange.BaseShaderRegister = 0;
+        descRange.RegisterSpace = 0;
+        descRange.OffsetInDescriptorsFromTableStart = 0;
+
+        D3D12_ROOT_PARAMETER param[2] = {};
+
+        param[0].ParameterType = D3D12_ROOT_PARAMETER_TYPE_32BIT_CONSTANTS;
+        param[0].Constants.ShaderRegister = 0;
+        param[0].Constants.RegisterSpace = 0;
+        param[0].Constants.Num32BitValues = 16;
+        param[0].ShaderVisibility = D3D12_SHADER_VISIBILITY_VERTEX;
+
+        param[1].ParameterType = D3D12_ROOT_PARAMETER_TYPE_DESCRIPTOR_TABLE;
+        param[1].DescriptorTable.NumDescriptorRanges = 1;
+        param[1].DescriptorTable.pDescriptorRanges = &descRange;
+        param[1].ShaderVisibility = D3D12_SHADER_VISIBILITY_PIXEL;
+
+        D3D12_STATIC_SAMPLER_DESC staticSampler = {};
+        staticSampler.Filter = D3D12_FILTER_MIN_MAG_MIP_LINEAR;
+        staticSampler.AddressU = D3D12_TEXTURE_ADDRESS_MODE_WRAP;
+        staticSampler.AddressV = D3D12_TEXTURE_ADDRESS_MODE_WRAP;
+        staticSampler.AddressW = D3D12_TEXTURE_ADDRESS_MODE_WRAP;
+        staticSampler.MipLODBias = 0.f;
+        staticSampler.MaxAnisotropy = 0;
+        staticSampler.ComparisonFunc = D3D12_COMPARISON_FUNC_ALWAYS;
+        staticSampler.BorderColor = D3D12_STATIC_BORDER_COLOR_TRANSPARENT_BLACK;
+        staticSampler.MinLOD = 0.f;
+        staticSampler.MaxLOD = 0.f;
+        staticSampler.ShaderRegister = 0;
+        staticSampler.RegisterSpace = 0;
+        staticSampler.ShaderVisibility = D3D12_SHADER_VISIBILITY_PIXEL;
+
+        D3D12_ROOT_SIGNATURE_DESC desc = {};
+        desc.NumParameters = _countof(param);
+        desc.pParameters = param;
+        desc.NumStaticSamplers = 1;
+        desc.pStaticSamplers = &staticSampler;
+        desc.Flags =
+            D3D12_ROOT_SIGNATURE_FLAG_ALLOW_INPUT_ASSEMBLER_INPUT_LAYOUT |
+            D3D12_ROOT_SIGNATURE_FLAG_DENY_HULL_SHADER_ROOT_ACCESS |
+            D3D12_ROOT_SIGNATURE_FLAG_DENY_DOMAIN_SHADER_ROOT_ACCESS |
+            D3D12_ROOT_SIGNATURE_FLAG_DENY_GEOMETRY_SHADER_ROOT_ACCESS;
+
+        ID3DBlob* blob = NULL;
+
+        static decltype(D3D12SerializeRootSignature)* D3D12SerializeRootSignature = (decltype(D3D12SerializeRootSignature))GetProcAddress(GetModuleHandle("d3d12.dll"), "D3D12SerializeRootSignature");
+        if (D3D12SerializeRootSignature(&desc, D3D_ROOT_SIGNATURE_VERSION_1, &blob, NULL) != S_OK)
+            return false;
+
+        g_pd3dDevice->CreateRootSignature(0, blob->GetBufferPointer(), blob->GetBufferSize(), IID_PPV_ARGS(&g_pRootSignature));
+        blob->Release();
+    }
+
+    // By using D3DCompile() from <d3dcompiler.h> / d3dcompiler.lib, we introduce a dependency to a given version of d3dcompiler_XX.dll (see D3DCOMPILER_DLL_A)
+    // If you would like to use this DX12 sample code but remove this dependency you can:
+    //  1) compile once, save the compiled shader blobs into a file or source code and pass them to CreateVertexShader()/CreatePixelShader() [preferred solution]
+    //  2) use code to detect any version of the DLL and grab a pointer to D3DCompile from the DLL.
+    // See https://github.com/ocornut/imgui/pull/638 for sources and details.
+
+    D3D12_GRAPHICS_PIPELINE_STATE_DESC psoDesc;
+    memset(&psoDesc, 0, sizeof(D3D12_GRAPHICS_PIPELINE_STATE_DESC));
+    psoDesc.NodeMask = 1;
+    psoDesc.PrimitiveTopologyType = D3D12_PRIMITIVE_TOPOLOGY_TYPE_TRIANGLE;
+    psoDesc.pRootSignature = g_pRootSignature;
+    psoDesc.SampleMask = UINT_MAX;
+    psoDesc.NumRenderTargets = 1;
+    psoDesc.RTVFormats[0] = g_RTVFormat;
+    psoDesc.SampleDesc.Count = 1;
+    psoDesc.Flags = D3D12_PIPELINE_STATE_FLAG_NONE;
+
+#ifdef USE_D3DCOMPILE
+    decltype(D3DCompile)* D3DCompile = load_d3dcompile();
+    if (D3DCompile == nullptr)
+        return false;
+#endif
+
+    // Create the vertex shader
+    {
+#ifdef USE_D3DCOMPILE
+        static const char* vertexShader =
+            "cbuffer vertexBuffer : register(b0) \
+            {\
+              float4x4 ProjectionMatrix; \
+            };\
+            struct VS_INPUT\
+            {\
+              float2 pos : POSITION;\
+              float4 col : COLOR0;\
+              float2 uv  : TEXCOORD0;\
+            };\
+            \
+            struct PS_INPUT\
+            {\
+              float4 pos : SV_POSITION;\
+              float4 col : COLOR0;\
+              float2 uv  : TEXCOORD0;\
+            };\
+            \
+            PS_INPUT main(VS_INPUT input)\
+            {\
+              PS_INPUT output;\
+              output.pos = mul( ProjectionMatrix, float4(input.pos.xy, 0.f, 1.f));\
+              output.col = input.col;\
+              output.uv  = input.uv;\
+              return output;\
+            }";
+
+        D3DCompile(vertexShader, strlen(vertexShader), NULL, NULL, NULL, "main", "vs_5_0", 0, 0, &g_pVertexShaderBlob, NULL);
+        if (g_pVertexShaderBlob == NULL) // NB: Pass ID3D10Blob* pErrorBlob to D3DCompile() to get error showing in (const char*)pErrorBlob->GetBufferPointer(). Make sure to Release() the blob!
+            return false;
+        psoDesc.VS = { g_pVertexShaderBlob->GetBufferPointer(), g_pVertexShaderBlob->GetBufferSize() };
+#else
+        psoDesc.VS = { ImGui_vertexShaderDX12, ImGui_vertexShaderDX12_len };
+#endif
+
+        
+        // Create the input layout
+        static D3D12_INPUT_ELEMENT_DESC local_layout[] = {
+            { "POSITION", 0, DXGI_FORMAT_R32G32_FLOAT,   0, (UINT)IM_OFFSETOF(ImDrawVert, pos), D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA, 0 },
+            { "TEXCOORD", 0, DXGI_FORMAT_R32G32_FLOAT,   0, (UINT)IM_OFFSETOF(ImDrawVert, uv),  D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA, 0 },
+            { "COLOR",    0, DXGI_FORMAT_R8G8B8A8_UNORM, 0, (UINT)IM_OFFSETOF(ImDrawVert, col), D3D12_INPUT_CLASSIFICATION_PER_VERTEX_DATA, 0 },
+        };
+        psoDesc.InputLayout = { local_layout, 3 };
+    }
+
+    // Create the pixel shader
+    {
+#ifdef USE_D3DCOMPILE
+        static const char* pixelShader =
+            "struct PS_INPUT\
+            {\
+              float4 pos : SV_POSITION;\
+              float4 col : COLOR0;\
+              float2 uv  : TEXCOORD0;\
+            };\
+            SamplerState sampler0 : register(s0);\
+            Texture2D texture0 : register(t0);\
+            \
+            float4 main(PS_INPUT input) : SV_Target\
+            {\
+              float4 out_col = input.col * texture0.Sample(sampler0, input.uv); \
+              return out_col; \
+            }";
+
+        D3DCompile(pixelShader, strlen(pixelShader), NULL, NULL, NULL, "main", "ps_5_0", 0, 0, &g_pPixelShaderBlob, NULL);
+        if (g_pPixelShaderBlob == NULL)  // NB: Pass ID3D10Blob* pErrorBlob to D3DCompile() to get error showing in (const char*)pErrorBlob->GetBufferPointer(). Make sure to Release() the blob!
+            return false;
+        psoDesc.PS = { g_pPixelShaderBlob->GetBufferPointer(), g_pPixelShaderBlob->GetBufferSize() };
+#else
+
+        psoDesc.PS = { ImGui_pixelShaderDX12, ImGui_pixelShaderDX12_len };
+#endif
+    }
+
+#ifdef USE_D3DCOMPILE
+    unload_d3dcompile();
+#endif
+
+    // Create the blending setup
+    {
+        D3D12_BLEND_DESC& desc = psoDesc.BlendState;
+        desc.AlphaToCoverageEnable = false;
+        desc.RenderTarget[0].BlendEnable = true;
+        desc.RenderTarget[0].SrcBlend = D3D12_BLEND_SRC_ALPHA;
+        desc.RenderTarget[0].DestBlend = D3D12_BLEND_INV_SRC_ALPHA;
+        desc.RenderTarget[0].BlendOp = D3D12_BLEND_OP_ADD;
+        desc.RenderTarget[0].SrcBlendAlpha = D3D12_BLEND_INV_SRC_ALPHA;
+        desc.RenderTarget[0].DestBlendAlpha = D3D12_BLEND_ZERO;
+        desc.RenderTarget[0].BlendOpAlpha = D3D12_BLEND_OP_ADD;
+        desc.RenderTarget[0].RenderTargetWriteMask = D3D12_COLOR_WRITE_ENABLE_ALL;
+    }
+
+    // Create the rasterizer state
+    {
+        D3D12_RASTERIZER_DESC& desc = psoDesc.RasterizerState;
+        desc.FillMode = D3D12_FILL_MODE_SOLID;
+        desc.CullMode = D3D12_CULL_MODE_NONE;
+        desc.FrontCounterClockwise = FALSE;
+        desc.DepthBias = D3D12_DEFAULT_DEPTH_BIAS;
+        desc.DepthBiasClamp = D3D12_DEFAULT_DEPTH_BIAS_CLAMP;
+        desc.SlopeScaledDepthBias = D3D12_DEFAULT_SLOPE_SCALED_DEPTH_BIAS;
+        desc.DepthClipEnable = true;
+        desc.MultisampleEnable = FALSE;
+        desc.AntialiasedLineEnable = FALSE;
+        desc.ForcedSampleCount = 0;
+        desc.ConservativeRaster = D3D12_CONSERVATIVE_RASTERIZATION_MODE_OFF;
+    }
+
+    // Create depth-stencil State
+    {
+        D3D12_DEPTH_STENCIL_DESC& desc = psoDesc.DepthStencilState;
+        desc.DepthEnable = false;
+        desc.DepthWriteMask = D3D12_DEPTH_WRITE_MASK_ALL;
+        desc.DepthFunc = D3D12_COMPARISON_FUNC_ALWAYS;
+        desc.StencilEnable = false;
+        desc.FrontFace.StencilFailOp = desc.FrontFace.StencilDepthFailOp = desc.FrontFace.StencilPassOp = D3D12_STENCIL_OP_KEEP;
+        desc.FrontFace.StencilFunc = D3D12_COMPARISON_FUNC_ALWAYS;
+        desc.BackFace = desc.FrontFace;
+    }
+
+    if (g_pd3dDevice->CreateGraphicsPipelineState(&psoDesc, IID_PPV_ARGS(&g_pPipelineState)) != S_OK)
+        return false;
+
+    ImGui_ImplDX12_CreateFontsTexture();
+
+    return true;
+}
+
+void    ImGui_ImplDX12_InvalidateDeviceObjects()
+{
+    if (!g_pd3dDevice)
+        return;
+
+    ImGuiIO& io = ImGui::GetIO();
+#ifdef USE_D3DCOMPILE
+    if (g_pVertexShaderBlob) { g_pVertexShaderBlob->Release(); g_pVertexShaderBlob = NULL; }
+    if (g_pPixelShaderBlob) { g_pPixelShaderBlob->Release(); g_pPixelShaderBlob = NULL; }
+#endif
+    if (g_pRootSignature) { g_pRootSignature->Release(); g_pRootSignature = NULL; }
+    if (g_pPipelineState) { g_pPipelineState->Release(); g_pPipelineState = NULL; }
+    if (g_pFontTextureResource) { g_pFontTextureResource->Release(); g_pFontTextureResource = NULL; io.Fonts->TexID = NULL; } // We copied g_pFontTextureView to io.Fonts->TexID so let's clear that as well.
+    for (UINT i = 0; i < g_numFramesInFlight; i++)
+    {
+        FrameResources* fr = &g_pFrameResources[i];
+        if (fr->IndexBuffer)  { fr->IndexBuffer->Release();  fr->IndexBuffer = NULL; }
+        if (fr->VertexBuffer) { fr->VertexBuffer->Release(); fr->VertexBuffer = NULL; }
+    }
+}
+
+bool ImGui_ImplDX12_Init(ID3D12Device* device, int num_frames_in_flight, DXGI_FORMAT rtv_format,
+                         D3D12_CPU_DESCRIPTOR_HANDLE font_srv_cpu_desc_handle, D3D12_GPU_DESCRIPTOR_HANDLE font_srv_gpu_desc_handle)
+{
+    // Setup back-end capabilities flags
+    ImGuiIO& io = ImGui::GetIO();
+    io.BackendRendererName = "imgui_impl_dx12";
+    io.BackendFlags |= ImGuiBackendFlags_RendererHasVtxOffset;  // We can honor the ImDrawCmd::VtxOffset field, allowing for large meshes.
+
+    g_pd3dDevice = device;
+    g_RTVFormat = rtv_format;
+    g_hFontSrvCpuDescHandle = font_srv_cpu_desc_handle;
+    g_hFontSrvGpuDescHandle = font_srv_gpu_desc_handle;
+    g_pFrameResources = new FrameResources[num_frames_in_flight];
+    g_numFramesInFlight = num_frames_in_flight;
+    g_frameIndex = UINT_MAX;
+
+    // Create buffers with a default size (they will later be grown as needed)
+    for (int i = 0; i < num_frames_in_flight; i++)
+    {
+        FrameResources* fr = &g_pFrameResources[i];
+        fr->IndexBuffer = NULL;
+        fr->VertexBuffer = NULL;
+        fr->IndexBufferSize = 10000;
+        fr->VertexBufferSize = 5000;
+    }
+
+    return true;
+}
+
+void ImGui_ImplDX12_Shutdown()
+{
+    ImGui_ImplDX12_InvalidateDeviceObjects();
+    delete[] g_pFrameResources;
+    g_pFrameResources = NULL;
+    g_pd3dDevice = NULL;
+    g_hFontSrvCpuDescHandle.ptr = 0;
+    g_hFontSrvGpuDescHandle.ptr = 0;
+    g_numFramesInFlight = 0;
+    g_frameIndex = UINT_MAX;
+}
+
+bool ImGui_ImplDX12_NewFrame()
+{
+    if (!g_pPipelineState)
+        return ImGui_ImplDX12_CreateDeviceObjects();
+
+    return true;
+}

ImGui/impls/windows/imgui_impl_dx12.h

@@ -0,0 +1,34 @@
+// dear imgui: Renderer for DirectX12
+// This needs to be used along with a Platform Binding (e.g. Win32)
+
+// Implemented features:
+//  [X] Renderer: User texture binding. Use 'D3D12_GPU_DESCRIPTOR_HANDLE' as ImTextureID. Read the FAQ about ImTextureID in imgui.cpp.
+//  [X] Renderer: Support for large meshes (64k+ vertices) with 16-bits indices.
+// Issues:
+//  [ ] 64-bit only for now! (Because sizeof(ImTextureId) == sizeof(void*)). See github.com/ocornut/imgui/pull/301
+
+// You can copy and use unmodified imgui_impl_* files in your project. See main.cpp for an example of using this.
+// If you are new to dear imgui, read examples/README.txt and read the documentation at the top of imgui.cpp.
+// https://github.com/ocornut/imgui
+
+#pragma once
+
+enum DXGI_FORMAT;
+struct ID3D12Device;
+struct ID3D12GraphicsCommandList;
+struct D3D12_CPU_DESCRIPTOR_HANDLE;
+struct D3D12_GPU_DESCRIPTOR_HANDLE;
+
+// cmd_list is the command list that the implementation will use to render imgui draw lists.
+// Before calling the render function, caller must prepare cmd_list by resetting it and setting the appropriate
+// render target and descriptor heap that contains font_srv_cpu_desc_handle/font_srv_gpu_desc_handle.
+// font_srv_cpu_desc_handle and font_srv_gpu_desc_handle are handles to a single SRV descriptor to use for the internal font texture.
+IMGUI_IMPL_API bool     ImGui_ImplDX12_Init(ID3D12Device* device, int num_frames_in_flight, DXGI_FORMAT rtv_format,
+                                            D3D12_CPU_DESCRIPTOR_HANDLE font_srv_cpu_desc_handle, D3D12_GPU_DESCRIPTOR_HANDLE font_srv_gpu_desc_handle);
+IMGUI_IMPL_API void     ImGui_ImplDX12_Shutdown();
+IMGUI_IMPL_API bool     ImGui_ImplDX12_NewFrame();
+IMGUI_IMPL_API void     ImGui_ImplDX12_RenderDrawData(ImDrawData* draw_data, ID3D12GraphicsCommandList* graphics_command_list);
+
+// Use if you want to reset your rendering device without losing ImGui state.
+IMGUI_IMPL_API void     ImGui_ImplDX12_InvalidateDeviceObjects();
+IMGUI_IMPL_API bool     ImGui_ImplDX12_CreateDeviceObjects();

ImGui/impls/windows/imgui_impl_dx9.cpp

@@ -0,0 +1,286 @@
+// dear imgui: Renderer for DirectX9
+// This needs to be used along with a Platform Binding (e.g. Win32)
+
+// Implemented features:
+//  [X] Renderer: User texture binding. Use 'LPDIRECT3DTEXTURE9' as ImTextureID. Read the FAQ about ImTextureID in imgui.cpp.
+//  [X] Renderer: Support for large meshes (64k+ vertices) with 16-bits indices.
+
+// You can copy and use unmodified imgui_impl_* files in your project. See main.cpp for an example of using this.
+// If you are new to dear imgui, read examples/README.txt and read the documentation at the top of imgui.cpp.
+// https://github.com/ocornut/imgui
+
+// CHANGELOG
+// (minor and older changes stripped away, please see git history for details)
+//  2019-05-29: DirectX9: Added support for large mesh (64K+ vertices), enable ImGuiBackendFlags_RendererHasVtxOffset flag.
+//  2019-04-30: DirectX9: Added support for special ImDrawCallback_ResetRenderState callback to reset render state.
+//  2019-03-29: Misc: Fixed erroneous assert in ImGui_ImplDX9_InvalidateDeviceObjects().
+//  2019-01-16: Misc: Disabled fog before drawing UI's. Fixes issue #2288.
+//  2018-11-30: Misc: Setting up io.BackendRendererName so it can be displayed in the About Window.
+//  2018-06-08: Misc: Extracted imgui_impl_dx9.cpp/.h away from the old combined DX9+Win32 example.
+//  2018-06-08: DirectX9: Use draw_data->DisplayPos and draw_data->DisplaySize to setup projection matrix and clipping rectangle.
+//  2018-05-07: Render: Saving/restoring Transform because they don't seem to be included in the StateBlock. Setting shading mode to Gouraud.
+//  2018-02-16: Misc: Obsoleted the io.RenderDrawListsFn callback and exposed ImGui_ImplDX9_RenderDrawData() in the .h file so you can call it yourself.
+//  2018-02-06: Misc: Removed call to ImGui::Shutdown() which is not available from 1.60 WIP, user needs to call CreateContext/DestroyContext themselves.
+
+#include "../../imgui.h"
+#include "imgui_impl_dx9.h"
+
+// DirectX
+#include <d3d9.h>
+#define DIRECTINPUT_VERSION 0x0800
+#include <dinput.h>
+
+// DirectX data
+static LPDIRECT3DDEVICE9        g_pd3dDevice = NULL;
+static LPDIRECT3DVERTEXBUFFER9  g_pVB = NULL;
+static LPDIRECT3DINDEXBUFFER9   g_pIB = NULL;
+static LPDIRECT3DTEXTURE9       g_FontTexture = NULL;
+static int                      g_VertexBufferSize = 5000, g_IndexBufferSize = 10000;
+
+struct CUSTOMVERTEX
+{
+    float    pos[3];
+    D3DCOLOR col;
+    float    uv[2];
+};
+#define D3DFVF_CUSTOMVERTEX (D3DFVF_XYZ|D3DFVF_DIFFUSE|D3DFVF_TEX1)
+
+static void ImGui_ImplDX9_SetupRenderState(ImDrawData* draw_data)
+{
+    // Setup viewport
+    D3DVIEWPORT9 vp;
+    vp.X = vp.Y = 0;
+    vp.Width = (DWORD)draw_data->DisplaySize.x;
+    vp.Height = (DWORD)draw_data->DisplaySize.y;
+    vp.MinZ = 0.0f;
+    vp.MaxZ = 1.0f;
+    g_pd3dDevice->SetViewport(&vp);
+
+    // Setup render state: fixed-pipeline, alpha-blending, no face culling, no depth testing, shade mode (for gradient)
+    g_pd3dDevice->SetPixelShader(NULL);
+    g_pd3dDevice->SetVertexShader(NULL);
+    g_pd3dDevice->SetRenderState(D3DRS_CULLMODE, D3DCULL_NONE);
+    g_pd3dDevice->SetRenderState(D3DRS_LIGHTING, false);
+    g_pd3dDevice->SetRenderState(D3DRS_ZENABLE, false);
+    g_pd3dDevice->SetRenderState(D3DRS_ALPHABLENDENABLE, true);
+    g_pd3dDevice->SetRenderState(D3DRS_ALPHATESTENABLE, false);
+    g_pd3dDevice->SetRenderState(D3DRS_BLENDOP, D3DBLENDOP_ADD);
+    g_pd3dDevice->SetRenderState(D3DRS_SRCBLEND, D3DBLEND_SRCALPHA);
+    g_pd3dDevice->SetRenderState(D3DRS_DESTBLEND, D3DBLEND_INVSRCALPHA);
+    g_pd3dDevice->SetRenderState(D3DRS_SCISSORTESTENABLE, true);
+    g_pd3dDevice->SetRenderState(D3DRS_SHADEMODE, D3DSHADE_GOURAUD);
+    g_pd3dDevice->SetRenderState(D3DRS_FOGENABLE, false);
+    g_pd3dDevice->SetTextureStageState(0, D3DTSS_COLOROP, D3DTOP_MODULATE);
+    g_pd3dDevice->SetTextureStageState(0, D3DTSS_COLORARG1, D3DTA_TEXTURE);
+    g_pd3dDevice->SetTextureStageState(0, D3DTSS_COLORARG2, D3DTA_DIFFUSE);
+    g_pd3dDevice->SetTextureStageState(0, D3DTSS_ALPHAOP, D3DTOP_MODULATE);
+    g_pd3dDevice->SetTextureStageState(0, D3DTSS_ALPHAARG1, D3DTA_TEXTURE);
+    g_pd3dDevice->SetTextureStageState(0, D3DTSS_ALPHAARG2, D3DTA_DIFFUSE);
+    g_pd3dDevice->SetSamplerState(0, D3DSAMP_MINFILTER, D3DTEXF_LINEAR);
+    g_pd3dDevice->SetSamplerState(0, D3DSAMP_MAGFILTER, D3DTEXF_LINEAR);
+
+    // Setup orthographic projection matrix
+    // Our visible imgui space lies from draw_data->DisplayPos (top left) to draw_data->DisplayPos+data_data->DisplaySize (bottom right). DisplayPos is (0,0) for single viewport apps.
+    // Being agnostic of whether <d3dx9.h> or <DirectXMath.h> can be used, we aren't relying on D3DXMatrixIdentity()/D3DXMatrixOrthoOffCenterLH() or DirectX::XMMatrixIdentity()/DirectX::XMMatrixOrthographicOffCenterLH()
+    {
+        float L = draw_data->DisplayPos.x + 0.5f;
+        float R = draw_data->DisplayPos.x + draw_data->DisplaySize.x + 0.5f;
+        float T = draw_data->DisplayPos.y + 0.5f;
+        float B = draw_data->DisplayPos.y + draw_data->DisplaySize.y + 0.5f;
+        D3DMATRIX mat_identity = { { { 1.0f, 0.0f, 0.0f, 0.0f,  0.0f, 1.0f, 0.0f, 0.0f,  0.0f, 0.0f, 1.0f, 0.0f,  0.0f, 0.0f, 0.0f, 1.0f } } };
+        D3DMATRIX mat_projection =
+        { { {
+            2.0f/(R-L),   0.0f,         0.0f,  0.0f,
+            0.0f,         2.0f/(T-B),   0.0f,  0.0f,
+            0.0f,         0.0f,         0.5f,  0.0f,
+            (L+R)/(L-R),  (T+B)/(B-T),  0.5f,  1.0f
+        } } };
+        g_pd3dDevice->SetTransform(D3DTS_WORLD, &mat_identity);
+        g_pd3dDevice->SetTransform(D3DTS_VIEW, &mat_identity);
+        g_pd3dDevice->SetTransform(D3DTS_PROJECTION, &mat_projection);
+    }
+}
+
+// Render function.
+// (this used to be set in io.RenderDrawListsFn and called by ImGui::Render(), but you can now call this directly from your main loop)
+void ImGui_ImplDX9_RenderDrawData(ImDrawData* draw_data)
+{
+    // Avoid rendering when minimized
+    if (draw_data->DisplaySize.x <= 0.0f || draw_data->DisplaySize.y <= 0.0f)
+        return;
+
+    // Create and grow buffers if needed
+    if (!g_pVB || g_VertexBufferSize < draw_data->TotalVtxCount)
+    {
+        if (g_pVB) { g_pVB->Release(); g_pVB = NULL; }
+        g_VertexBufferSize = draw_data->TotalVtxCount + 5000;
+        if (g_pd3dDevice->CreateVertexBuffer(g_VertexBufferSize * sizeof(CUSTOMVERTEX), D3DUSAGE_DYNAMIC | D3DUSAGE_WRITEONLY, D3DFVF_CUSTOMVERTEX, D3DPOOL_DEFAULT, &g_pVB, NULL) < 0)
+            return;
+    }
+    if (!g_pIB || g_IndexBufferSize < draw_data->TotalIdxCount)
+    {
+        if (g_pIB) { g_pIB->Release(); g_pIB = NULL; }
+        g_IndexBufferSize = draw_data->TotalIdxCount + 10000;
+        if (g_pd3dDevice->CreateIndexBuffer(g_IndexBufferSize * sizeof(ImDrawIdx), D3DUSAGE_DYNAMIC | D3DUSAGE_WRITEONLY, sizeof(ImDrawIdx) == 2 ? D3DFMT_INDEX16 : D3DFMT_INDEX32, D3DPOOL_DEFAULT, &g_pIB, NULL) < 0)
+            return;
+    }
+
+    // Backup the DX9 state
+    IDirect3DStateBlock9* d3d9_state_block = NULL;
+    if (g_pd3dDevice->CreateStateBlock(D3DSBT_ALL, &d3d9_state_block) < 0)
+        return;
+
+    // Backup the DX9 transform (DX9 documentation suggests that it is included in the StateBlock but it doesn't appear to)
+    D3DMATRIX last_world, last_view, last_projection;
+    g_pd3dDevice->GetTransform(D3DTS_WORLD, &last_world);
+    g_pd3dDevice->GetTransform(D3DTS_VIEW, &last_view);
+    g_pd3dDevice->GetTransform(D3DTS_PROJECTION, &last_projection);
+
+    // Copy and convert all vertices into a single contiguous buffer, convert colors to DX9 default format.
+    // FIXME-OPT: This is a waste of resource, the ideal is to use imconfig.h and
+    //  1) to avoid repacking colors:   #define IMGUI_USE_BGRA_PACKED_COLOR
+    //  2) to avoid repacking vertices: #define IMGUI_OVERRIDE_DRAWVERT_STRUCT_LAYOUT struct ImDrawVert { ImVec2 pos; float z; ImU32 col; ImVec2 uv; }
+    CUSTOMVERTEX* vtx_dst;
+    ImDrawIdx* idx_dst;
+    if (g_pVB->Lock(0, (UINT)(draw_data->TotalVtxCount * sizeof(CUSTOMVERTEX)), (void**)&vtx_dst, D3DLOCK_DISCARD) < 0)
+        return;
+    if (g_pIB->Lock(0, (UINT)(draw_data->TotalIdxCount * sizeof(ImDrawIdx)), (void**)&idx_dst, D3DLOCK_DISCARD) < 0)
+        return;
+    for (int n = 0; n < draw_data->CmdListsCount; n++)
+    {
+        const ImDrawList* cmd_list = draw_data->CmdLists[n];
+        const ImDrawVert* vtx_src = cmd_list->VtxBuffer.Data;
+        for (int i = 0; i < cmd_list->VtxBuffer.Size; i++)
+        {
+            vtx_dst->pos[0] = vtx_src->pos.x;
+            vtx_dst->pos[1] = vtx_src->pos.y;
+            vtx_dst->pos[2] = 0.0f;
+            vtx_dst->col = (vtx_src->col & 0xFF00FF00) | ((vtx_src->col & 0xFF0000) >> 16) | ((vtx_src->col & 0xFF) << 16);     // RGBA --> ARGB for DirectX9
+            vtx_dst->uv[0] = vtx_src->uv.x;
+            vtx_dst->uv[1] = vtx_src->uv.y;
+            vtx_dst++;
+            vtx_src++;
+        }
+        memcpy(idx_dst, cmd_list->IdxBuffer.Data, cmd_list->IdxBuffer.Size * sizeof(ImDrawIdx));
+        idx_dst += cmd_list->IdxBuffer.Size;
+    }
+    g_pVB->Unlock();
+    g_pIB->Unlock();
+    g_pd3dDevice->SetStreamSource(0, g_pVB, 0, sizeof(CUSTOMVERTEX));
+    g_pd3dDevice->SetIndices(g_pIB);
+    g_pd3dDevice->SetFVF(D3DFVF_CUSTOMVERTEX);
+
+    // Setup desired DX state
+    ImGui_ImplDX9_SetupRenderState(draw_data);
+
+    // Render command lists
+    // (Because we merged all buffers into a single one, we maintain our own offset into them)
+    int global_vtx_offset = 0;
+    int global_idx_offset = 0;
+    ImVec2 clip_off = draw_data->DisplayPos;
+    for (int n = 0; n < draw_data->CmdListsCount; n++)
+    {
+        const ImDrawList* cmd_list = draw_data->CmdLists[n];
+        for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.Size; cmd_i++)
+        {
+            const ImDrawCmd* pcmd = &cmd_list->CmdBuffer[cmd_i];
+            if (pcmd->UserCallback != NULL)
+            {
+                // User callback, registered via ImDrawList::AddCallback()
+                // (ImDrawCallback_ResetRenderState is a special callback value used by the user to request the renderer to reset render state.)
+                if (pcmd->UserCallback == ImDrawCallback_ResetRenderState)
+                    ImGui_ImplDX9_SetupRenderState(draw_data);
+                else
+                    pcmd->UserCallback(cmd_list, pcmd);
+            }
+            else
+            {
+                const RECT r = { (LONG)(pcmd->ClipRect.x - clip_off.x), (LONG)(pcmd->ClipRect.y - clip_off.y), (LONG)(pcmd->ClipRect.z - clip_off.x), (LONG)(pcmd->ClipRect.w - clip_off.y) };
+                const LPDIRECT3DTEXTURE9 texture = (LPDIRECT3DTEXTURE9)pcmd->TextureId;
+                g_pd3dDevice->SetTexture(0, texture);
+                g_pd3dDevice->SetScissorRect(&r);
+                g_pd3dDevice->DrawIndexedPrimitive(D3DPT_TRIANGLELIST, pcmd->VtxOffset + global_vtx_offset, 0, (UINT)cmd_list->VtxBuffer.Size, pcmd->IdxOffset + global_idx_offset, pcmd->ElemCount/3);
+            }
+        }
+        global_idx_offset += cmd_list->IdxBuffer.Size;
+        global_vtx_offset += cmd_list->VtxBuffer.Size;
+    }
+
+    // Restore the DX9 transform
+    g_pd3dDevice->SetTransform(D3DTS_WORLD, &last_world);
+    g_pd3dDevice->SetTransform(D3DTS_VIEW, &last_view);
+    g_pd3dDevice->SetTransform(D3DTS_PROJECTION, &last_projection);
+
+    // Restore the DX9 state
+    d3d9_state_block->Apply();
+    d3d9_state_block->Release();
+}
+
+bool ImGui_ImplDX9_Init(IDirect3DDevice9* device)
+{
+    // Setup back-end capabilities flags
+    ImGuiIO& io = ImGui::GetIO();
+    io.BackendRendererName = "imgui_impl_dx9";
+    io.BackendFlags |= ImGuiBackendFlags_RendererHasVtxOffset;  // We can honor the ImDrawCmd::VtxOffset field, allowing for large meshes.
+
+    g_pd3dDevice = device;
+    g_pd3dDevice->AddRef();
+    return true;
+}
+
+void ImGui_ImplDX9_Shutdown()
+{
+    ImGui_ImplDX9_InvalidateDeviceObjects();
+    if (g_pd3dDevice) { g_pd3dDevice->Release(); g_pd3dDevice = NULL; }
+}
+
+static bool ImGui_ImplDX9_CreateFontsTexture()
+{
+    // Build texture atlas
+    ImGuiIO& io = ImGui::GetIO();
+    unsigned char* pixels;
+    int width, height, bytes_per_pixel;
+    io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height, &bytes_per_pixel);
+
+    // Upload texture to graphics system
+    g_FontTexture = NULL;
+    if (g_pd3dDevice->CreateTexture(width, height, 1, D3DUSAGE_DYNAMIC, D3DFMT_A8R8G8B8, D3DPOOL_DEFAULT, &g_FontTexture, NULL) < 0)
+        return false;
+    D3DLOCKED_RECT tex_locked_rect;
+    if (g_FontTexture->LockRect(0, &tex_locked_rect, NULL, 0) != D3D_OK)
+        return false;
+    for (int y = 0; y < height; y++)
+        memcpy((unsigned char *)tex_locked_rect.pBits + tex_locked_rect.Pitch * y, pixels + (width * bytes_per_pixel) * y, (width * bytes_per_pixel));
+    g_FontTexture->UnlockRect(0);
+
+    // Store our identifier
+    io.Fonts->TexID = (ImTextureID)g_FontTexture;
+
+    return true;
+}
+
+bool ImGui_ImplDX9_CreateDeviceObjects()
+{
+    if (!g_pd3dDevice)
+        return false;
+    if (!ImGui_ImplDX9_CreateFontsTexture())
+        return false;
+    return true;
+}
+
+void ImGui_ImplDX9_InvalidateDeviceObjects()
+{
+    if (!g_pd3dDevice)
+        return;
+    if (g_pVB) { g_pVB->Release(); g_pVB = NULL; }
+    if (g_pIB) { g_pIB->Release(); g_pIB = NULL; }
+    if (g_FontTexture) { g_FontTexture->Release(); g_FontTexture = NULL; ImGui::GetIO().Fonts->TexID = NULL; } // We copied g_pFontTextureView to io.Fonts->TexID so let's clear that as well.
+}
+
+bool ImGui_ImplDX9_NewFrame()
+{
+    if (!g_FontTexture)
+        return ImGui_ImplDX9_CreateDeviceObjects();
+
+    return true;
+}

ImGui/impls/windows/imgui_impl_dx9.h

@@ -0,0 +1,23 @@
+// dear imgui: Renderer for DirectX9
+// This needs to be used along with a Platform Binding (e.g. Win32)
+
+// Implemented features:
+//  [X] Renderer: User texture binding. Use 'LPDIRECT3DTEXTURE9' as ImTextureID. Read the FAQ about ImTextureID in imgui.cpp.
+//  [X] Renderer: Support for large meshes (64k+ vertices) with 16-bits indices.
+
+// You can copy and use unmodified imgui_impl_* files in your project. See main.cpp for an example of using this.
+// If you are new to dear imgui, read examples/README.txt and read the documentation at the top of imgui.cpp.
+// https://github.com/ocornut/imgui
+
+#pragma once
+
+struct IDirect3DDevice9;
+
+IMGUI_IMPL_API bool     ImGui_ImplDX9_Init(IDirect3DDevice9* device);
+IMGUI_IMPL_API void     ImGui_ImplDX9_Shutdown();
+IMGUI_IMPL_API bool     ImGui_ImplDX9_NewFrame();
+IMGUI_IMPL_API void     ImGui_ImplDX9_RenderDrawData(ImDrawData* draw_data);
+
+// Use if you want to reset your rendering device without losing ImGui state.
+IMGUI_IMPL_API bool     ImGui_ImplDX9_CreateDeviceObjects();
+IMGUI_IMPL_API void     ImGui_ImplDX9_InvalidateDeviceObjects();

ImGui/impls/windows/imgui_impl_win32.cpp

@@ -0,0 +1,324 @@
+// dear imgui: Platform Binding for Windows (standard windows API for 32 and 64 bits applications)
+// This needs to be used along with a Renderer (e.g. DirectX11, OpenGL3, Vulkan..)
+
+// Implemented features:
+//  [X] Platform: Clipboard support (for Win32 this is actually part of core imgui)
+//  [X] Platform: Mouse cursor shape and visibility. Disable with 'io.ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange'.
+//  [X] Platform: Keyboard arrays indexed using VK_* Virtual Key Codes, e.g. ImGui::IsKeyPressed(VK_SPACE).
+//  [X] Platform: Gamepad support. Enabled with 'io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad'.
+
+#include "../../imgui.h"
+#include "imgui_impl_win32.h"
+#ifndef WIN32_LEAN_AND_MEAN
+#define WIN32_LEAN_AND_MEAN
+#endif
+#include <windows.h>
+#include <XInput.h>
+#include <tchar.h>
+
+// CHANGELOG
+// (minor and older changes stripped away, please see git history for details)
+//  2019-05-11: Inputs: Don't filter value from WM_CHAR before calling AddInputCharacter().
+//  2019-01-17: Misc: Using GetForegroundWindow()+IsChild() instead of GetActiveWindow() to be compatible with windows created in a different thread or parent.
+//  2019-01-17: Inputs: Added support for mouse buttons 4 and 5 via WM_XBUTTON* messages.
+//  2019-01-15: Inputs: Added support for XInput gamepads (if ImGuiConfigFlags_NavEnableGamepad is set by user application).
+//  2018-11-30: Misc: Setting up io.BackendPlatformName so it can be displayed in the About Window.
+//  2018-06-29: Inputs: Added support for the ImGuiMouseCursor_Hand cursor.
+//  2018-06-10: Inputs: Fixed handling of mouse wheel messages to support fine position messages (typically sent by track-pads).
+//  2018-06-08: Misc: Extracted imgui_impl_win32.cpp/.h away from the old combined DX9/DX10/DX11/DX12 examples.
+//  2018-03-20: Misc: Setup io.BackendFlags ImGuiBackendFlags_HasMouseCursors and ImGuiBackendFlags_HasSetMousePos flags + honor ImGuiConfigFlags_NoMouseCursorChange flag.
+//  2018-02-20: Inputs: Added support for mouse cursors (ImGui::GetMouseCursor() value and WM_SETCURSOR message handling).
+//  2018-02-06: Inputs: Added mapping for ImGuiKey_Space.
+//  2018-02-06: Inputs: Honoring the io.WantSetMousePos by repositioning the mouse (when using navigation and ImGuiConfigFlags_NavMoveMouse is set).
+//  2018-02-06: Misc: Removed call to ImGui::Shutdown() which is not available from 1.60 WIP, user needs to call CreateContext/DestroyContext themselves.
+//  2018-01-20: Inputs: Added Horizontal Mouse Wheel support.
+//  2018-01-08: Inputs: Added mapping for ImGuiKey_Insert.
+//  2018-01-05: Inputs: Added WM_LBUTTONDBLCLK double-click handlers for window classes with the CS_DBLCLKS flag.
+//  2017-10-23: Inputs: Added WM_SYSKEYDOWN / WM_SYSKEYUP handlers so e.g. the VK_MENU key can be read.
+//  2017-10-23: Inputs: Using Win32 ::SetCapture/::GetCapture() to retrieve mouse positions outside the client area when dragging.
+//  2016-11-12: Inputs: Only call Win32 ::SetCursor(NULL) when io.MouseDrawCursor is set.
+
+// Win32 Data
+static HWND                 g_hWnd = 0;
+static INT64                g_Time = 0;
+static INT64                g_TicksPerSecond = 0;
+static ImGuiMouseCursor     g_LastMouseCursor = ImGuiMouseCursor_COUNT;
+static bool                 g_HasGamepad = false;
+static bool                 g_WantUpdateHasGamepad = true;
+
+// Functions
+bool    ImGui_ImplWin32_Init(void* hwnd)
+{
+    if (!::QueryPerformanceFrequency((LARGE_INTEGER *)&g_TicksPerSecond))
+        return false;
+    if (!::QueryPerformanceCounter((LARGE_INTEGER *)&g_Time))
+        return false;
+
+    // Setup back-end capabilities flags
+    g_hWnd = (HWND)hwnd;
+    ImGuiIO& io = ImGui::GetIO();
+    io.BackendFlags |= ImGuiBackendFlags_HasMouseCursors;         // We can honor GetMouseCursor() values (optional)
+    io.BackendFlags |= ImGuiBackendFlags_HasSetMousePos;          // We can honor io.WantSetMousePos requests (optional, rarely used)
+    io.BackendPlatformName = "imgui_impl_win32";
+    io.ImeWindowHandle = hwnd;
+
+    // Keyboard mapping. ImGui will use those indices to peek into the io.KeysDown[] array that we will update during the application lifetime.
+    io.KeyMap[ImGuiKey_Tab] = VK_TAB;
+    io.KeyMap[ImGuiKey_LeftArrow] = VK_LEFT;
+    io.KeyMap[ImGuiKey_RightArrow] = VK_RIGHT;
+    io.KeyMap[ImGuiKey_UpArrow] = VK_UP;
+    io.KeyMap[ImGuiKey_DownArrow] = VK_DOWN;
+    io.KeyMap[ImGuiKey_PageUp] = VK_PRIOR;
+    io.KeyMap[ImGuiKey_PageDown] = VK_NEXT;
+    io.KeyMap[ImGuiKey_Home] = VK_HOME;
+    io.KeyMap[ImGuiKey_End] = VK_END;
+    io.KeyMap[ImGuiKey_Insert] = VK_INSERT;
+    io.KeyMap[ImGuiKey_Delete] = VK_DELETE;
+    io.KeyMap[ImGuiKey_Backspace] = VK_BACK;
+    io.KeyMap[ImGuiKey_Space] = VK_SPACE;
+    io.KeyMap[ImGuiKey_Enter] = VK_RETURN;
+    io.KeyMap[ImGuiKey_Escape] = VK_ESCAPE;
+    io.KeyMap[ImGuiKey_A] = 'A';
+    io.KeyMap[ImGuiKey_C] = 'C';
+    io.KeyMap[ImGuiKey_V] = 'V';
+    io.KeyMap[ImGuiKey_X] = 'X';
+    io.KeyMap[ImGuiKey_Y] = 'Y';
+    io.KeyMap[ImGuiKey_Z] = 'Z';
+
+    return true;
+}
+
+void    ImGui_ImplWin32_Shutdown()
+{
+    g_hWnd = (HWND)0;
+}
+
+static bool ImGui_ImplWin32_UpdateMouseCursor()
+{
+    ImGuiIO& io = ImGui::GetIO();
+    if (io.ConfigFlags & ImGuiConfigFlags_NoMouseCursorChange)
+        return false;
+
+    ImGuiMouseCursor imgui_cursor = ImGui::GetMouseCursor();
+    if (imgui_cursor == ImGuiMouseCursor_None || io.MouseDrawCursor)
+    {
+        // Hide OS mouse cursor if imgui is drawing it or if it wants no cursor
+        ::SetCursor(NULL);
+    }
+    else
+    {
+        // Show OS mouse cursor
+        LPTSTR win32_cursor = IDC_ARROW;
+        switch (imgui_cursor)
+        {
+        case ImGuiMouseCursor_Arrow:        win32_cursor = IDC_ARROW; break;
+        case ImGuiMouseCursor_TextInput:    win32_cursor = IDC_IBEAM; break;
+        case ImGuiMouseCursor_ResizeAll:    win32_cursor = IDC_SIZEALL; break;
+        case ImGuiMouseCursor_ResizeEW:     win32_cursor = IDC_SIZEWE; break;
+        case ImGuiMouseCursor_ResizeNS:     win32_cursor = IDC_SIZENS; break;
+        case ImGuiMouseCursor_ResizeNESW:   win32_cursor = IDC_SIZENESW; break;
+        case ImGuiMouseCursor_ResizeNWSE:   win32_cursor = IDC_SIZENWSE; break;
+        case ImGuiMouseCursor_Hand:         win32_cursor = IDC_HAND; break;
+        }
+        ::SetCursor(::LoadCursor(NULL, win32_cursor));
+    }
+    return true;
+}
+
+static void ImGui_ImplWin32_UpdateMousePos()
+{
+    ImGuiIO& io = ImGui::GetIO();
+
+    // Set OS mouse position if requested (rarely used, only when ImGuiConfigFlags_NavEnableSetMousePos is enabled by user)
+    if (io.WantSetMousePos)
+    {
+        POINT pos = { (int)io.MousePos.x, (int)io.MousePos.y };
+        ::ClientToScreen(g_hWnd, &pos);
+        ::SetCursorPos(pos.x, pos.y);
+    }
+
+    // Set mouse position
+    io.MousePos = ImVec2(-FLT_MAX, -FLT_MAX);
+    POINT pos;
+    if (HWND active_window = ::GetForegroundWindow())
+        if (active_window == g_hWnd || ::IsChild(active_window, g_hWnd))
+            if (::GetCursorPos(&pos) && ::ScreenToClient(g_hWnd, &pos))
+                io.MousePos = ImVec2((float)pos.x, (float)pos.y);
+}
+
+/*
+#ifdef _MSC_VER
+#pragma comment(lib, "xinput")
+#endif
+
+// Gamepad navigation mapping
+static void ImGui_ImplWin32_UpdateGamepads()
+{
+    ImGuiIO& io = ImGui::GetIO();
+    memset(io.NavInputs, 0, sizeof(io.NavInputs));
+    if ((io.ConfigFlags & ImGuiConfigFlags_NavEnableGamepad) == 0)
+        return;
+
+    // Calling XInputGetState() every frame on disconnected gamepads is unfortunately too slow.
+    // Instead we refresh gamepad availability by calling XInputGetCapabilities() _only_ after receiving WM_DEVICECHANGE.
+    if (g_WantUpdateHasGamepad)
+    {
+        XINPUT_CAPABILITIES caps;
+        g_HasGamepad = (XInputGetCapabilities(0, XINPUT_FLAG_GAMEPAD, &caps) == ERROR_SUCCESS);
+        g_WantUpdateHasGamepad = false;
+    }
+
+    XINPUT_STATE xinput_state;
+    io.BackendFlags &= ~ImGuiBackendFlags_HasGamepad;
+    if (g_HasGamepad && XInputGetState(0, &xinput_state) == ERROR_SUCCESS)
+    {
+        const XINPUT_GAMEPAD& gamepad = xinput_state.Gamepad;
+        io.BackendFlags |= ImGuiBackendFlags_HasGamepad;
+
+        #define MAP_BUTTON(NAV_NO, BUTTON_ENUM)     { io.NavInputs[NAV_NO] = (gamepad.wButtons & BUTTON_ENUM) ? 1.0f : 0.0f; }
+        #define MAP_ANALOG(NAV_NO, VALUE, V0, V1)   { float vn = (float)(VALUE - V0) / (float)(V1 - V0); if (vn > 1.0f) vn = 1.0f; if (vn > 0.0f && io.NavInputs[NAV_NO] < vn) io.NavInputs[NAV_NO] = vn; }
+        MAP_BUTTON(ImGuiNavInput_Activate,      XINPUT_GAMEPAD_A);              // Cross / A
+        MAP_BUTTON(ImGuiNavInput_Cancel,        XINPUT_GAMEPAD_B);              // Circle / B
+        MAP_BUTTON(ImGuiNavInput_Menu,          XINPUT_GAMEPAD_X);              // Square / X
+        MAP_BUTTON(ImGuiNavInput_Input,         XINPUT_GAMEPAD_Y);              // Triangle / Y
+        MAP_BUTTON(ImGuiNavInput_DpadLeft,      XINPUT_GAMEPAD_DPAD_LEFT);      // D-Pad Left
+        MAP_BUTTON(ImGuiNavInput_DpadRight,     XINPUT_GAMEPAD_DPAD_RIGHT);     // D-Pad Right
+        MAP_BUTTON(ImGuiNavInput_DpadUp,        XINPUT_GAMEPAD_DPAD_UP);        // D-Pad Up
+        MAP_BUTTON(ImGuiNavInput_DpadDown,      XINPUT_GAMEPAD_DPAD_DOWN);      // D-Pad Down
+        MAP_BUTTON(ImGuiNavInput_FocusPrev,     XINPUT_GAMEPAD_LEFT_SHOULDER);  // L1 / LB
+        MAP_BUTTON(ImGuiNavInput_FocusNext,     XINPUT_GAMEPAD_RIGHT_SHOULDER); // R1 / RB
+        MAP_BUTTON(ImGuiNavInput_TweakSlow,     XINPUT_GAMEPAD_LEFT_SHOULDER);  // L1 / LB
+        MAP_BUTTON(ImGuiNavInput_TweakFast,     XINPUT_GAMEPAD_RIGHT_SHOULDER); // R1 / RB
+        MAP_ANALOG(ImGuiNavInput_LStickLeft,    gamepad.sThumbLX,  -XINPUT_GAMEPAD_LEFT_THUMB_DEADZONE, -32768);
+        MAP_ANALOG(ImGuiNavInput_LStickRight,   gamepad.sThumbLX,  +XINPUT_GAMEPAD_LEFT_THUMB_DEADZONE, +32767);
+        MAP_ANALOG(ImGuiNavInput_LStickUp,      gamepad.sThumbLY,  +XINPUT_GAMEPAD_LEFT_THUMB_DEADZONE, +32767);
+        MAP_ANALOG(ImGuiNavInput_LStickDown,    gamepad.sThumbLY,  -XINPUT_GAMEPAD_LEFT_THUMB_DEADZONE, -32767);
+        #undef MAP_BUTTON
+        #undef MAP_ANALOG
+    }
+}
+*/
+
+void    ImGui_ImplWin32_NewFrame()
+{
+    ImGuiIO& io = ImGui::GetIO();
+    IM_ASSERT(io.Fonts->IsBuilt() && "Font atlas not built! It is generally built by the renderer back-end. Missing call to renderer _NewFrame() function? e.g. ImGui_ImplOpenGL3_NewFrame().");
+
+    // Setup display size (every frame to accommodate for window resizing)
+    RECT rect;
+    ::GetClientRect(g_hWnd, &rect);
+    io.DisplaySize = ImVec2((float)(rect.right - rect.left), (float)(rect.bottom - rect.top));
+
+    // Setup time step
+    INT64 current_time;
+    ::QueryPerformanceCounter((LARGE_INTEGER *)&current_time);
+    io.DeltaTime = (float)(current_time - g_Time) / g_TicksPerSecond;
+    g_Time = current_time;
+
+    // Read keyboard modifiers inputs
+    io.KeyCtrl = (::GetKeyState(VK_CONTROL) & 0x8000) != 0;
+    io.KeyShift = (::GetKeyState(VK_SHIFT) & 0x8000) != 0;
+    io.KeyAlt = (::GetKeyState(VK_MENU) & 0x8000) != 0;
+    io.KeySuper = false;
+    // io.KeysDown[], io.MousePos, io.MouseDown[], io.MouseWheel: filled by the WndProc handler below.
+
+    // Update OS mouse position
+    ImGui_ImplWin32_UpdateMousePos();
+
+    // Update OS mouse cursor with the cursor requested by imgui
+    ImGuiMouseCursor mouse_cursor = io.MouseDrawCursor ? ImGuiMouseCursor_None : ImGui::GetMouseCursor();
+    if (g_LastMouseCursor != mouse_cursor)
+    {
+        g_LastMouseCursor = mouse_cursor;
+        ImGui_ImplWin32_UpdateMouseCursor();
+    }
+
+    // Update game controllers (if enabled and available)
+    //ImGui_ImplWin32_UpdateGamepads();
+}
+
+// Allow compilation with old Windows SDK. MinGW doesn't have default _WIN32_WINNT/WINVER versions.
+#ifndef WM_MOUSEHWHEEL
+#define WM_MOUSEHWHEEL 0x020E
+#endif
+#ifndef DBT_DEVNODES_CHANGED
+#define DBT_DEVNODES_CHANGED 0x0007
+#endif
+
+// Process Win32 mouse/keyboard inputs.
+// You can read the io.WantCaptureMouse, io.WantCaptureKeyboard flags to tell if dear imgui wants to use your inputs.
+// - When io.WantCaptureMouse is true, do not dispatch mouse input data to your main application.
+// - When io.WantCaptureKeyboard is true, do not dispatch keyboard input data to your main application.
+// Generally you may always pass all inputs to dear imgui, and hide them from your application based on those two flags.
+// PS: In this Win32 handler, we use the capture API (GetCapture/SetCapture/ReleaseCapture) to be able to read mouse coordinates when dragging mouse outside of our window bounds.
+// PS: We treat DBLCLK messages as regular mouse down messages, so this code will work on windows classes that have the CS_DBLCLKS flag set. Our own example app code doesn't set this flag.
+IMGUI_IMPL_API LRESULT ImGui_ImplWin32_WndProcHandler(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
+{
+    if (ImGui::GetCurrentContext() == NULL)
+        return 0;
+
+    ImGuiIO& io = ImGui::GetIO();
+    switch (msg)
+    {
+    case WM_LBUTTONDOWN: case WM_LBUTTONDBLCLK:
+    case WM_RBUTTONDOWN: case WM_RBUTTONDBLCLK:
+    case WM_MBUTTONDOWN: case WM_MBUTTONDBLCLK:
+    case WM_XBUTTONDOWN: case WM_XBUTTONDBLCLK:
+    {
+        int button = 0;
+        if (msg == WM_LBUTTONDOWN || msg == WM_LBUTTONDBLCLK) { button = 0; }
+        if (msg == WM_RBUTTONDOWN || msg == WM_RBUTTONDBLCLK) { button = 1; }
+        if (msg == WM_MBUTTONDOWN || msg == WM_MBUTTONDBLCLK) { button = 2; }
+        if (msg == WM_XBUTTONDOWN || msg == WM_XBUTTONDBLCLK) { button = (GET_XBUTTON_WPARAM(wParam) == XBUTTON1) ? 3 : 4; }
+        if (!ImGui::IsAnyMouseDown() && ::GetCapture() == NULL)
+            ::SetCapture(hwnd);
+        io.MouseDown[button] = true;
+        return 0;
+    }
+    case WM_LBUTTONUP:
+    case WM_RBUTTONUP:
+    case WM_MBUTTONUP:
+    case WM_XBUTTONUP:
+    {
+        int button = 0;
+        if (msg == WM_LBUTTONUP) { button = 0; }
+        if (msg == WM_RBUTTONUP) { button = 1; }
+        if (msg == WM_MBUTTONUP) { button = 2; }
+        if (msg == WM_XBUTTONUP) { button = (GET_XBUTTON_WPARAM(wParam) == XBUTTON1) ? 3 : 4; }
+        io.MouseDown[button] = false;
+        if (!ImGui::IsAnyMouseDown() && ::GetCapture() == hwnd)
+            ::ReleaseCapture();
+        return 0;
+    }
+    case WM_MOUSEWHEEL:
+        io.MouseWheel += (float)GET_WHEEL_DELTA_WPARAM(wParam) / (float)WHEEL_DELTA;
+        return 0;
+    case WM_MOUSEHWHEEL:
+        io.MouseWheelH += (float)GET_WHEEL_DELTA_WPARAM(wParam) / (float)WHEEL_DELTA;
+        return 0;
+    case WM_KEYDOWN:
+    case WM_SYSKEYDOWN:
+        if (wParam < 256)
+            io.KeysDown[wParam] = 1;
+        return 0;
+    case WM_KEYUP:
+    case WM_SYSKEYUP:
+        if (wParam < 256)
+            io.KeysDown[wParam] = 0;
+        return 0;
+    case WM_CHAR:
+        // You can also use ToAscii()+GetKeyboardState() to retrieve characters.
+        io.AddInputCharacter((unsigned int)wParam);
+        return 0;
+    case WM_SETCURSOR:
+        if (LOWORD(lParam) == HTCLIENT && ImGui_ImplWin32_UpdateMouseCursor())
+            return 1;
+        return 0;
+    case WM_DEVICECHANGE:
+        if ((UINT)wParam == DBT_DEVNODES_CHANGED)
+            g_WantUpdateHasGamepad = true;
+        return 0;
+    }
+    return 0;
+}
+

ImGui/impls/windows/imgui_impl_win32.h

@@ -0,0 +1,21 @@
+// dear imgui: Platform Binding for Windows (standard windows API for 32 and 64 bits applications)
+// This needs to be used along with a Renderer (e.g. DirectX11, OpenGL3, Vulkan..)
+
+// Implemented features:
+//  [X] Platform: Clipboard support (for Win32 this is actually part of core imgui)
+//  [X] Platform: Mouse cursor shape and visibility. Disable with 'io.ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange'.
+//  [X] Platform: Keyboard arrays indexed using VK_* Virtual Key Codes, e.g. ImGui::IsKeyPressed(VK_SPACE).
+//  [X] Platform: Gamepad support. Enabled with 'io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad'.
+
+#pragma once
+
+IMGUI_IMPL_API bool     ImGui_ImplWin32_Init(void* hwnd);
+IMGUI_IMPL_API void     ImGui_ImplWin32_Shutdown();
+IMGUI_IMPL_API void     ImGui_ImplWin32_NewFrame();
+
+// Handler for Win32 messages, update mouse/keyboard data.
+// You may or not need this for your implementation, but it can serve as reference for handling inputs.
+// Intentionally commented out to avoid dragging dependencies on <windows.h> types. You can COPY this line into your .cpp code instead.
+/*
+IMGUI_IMPL_API LRESULT  ImGui_ImplWin32_WndProcHandler(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam);
+*/

ImGui/imstb_rectpack.h

@@ -0,0 +1,630 @@
+// [DEAR IMGUI] 
+// This is a slightly modified version of stb_rect_pack.h 0.99. 
+// Those changes would need to be pushed into nothings/stb:
+// - Added STBRP__CDECL
+// Grep for [DEAR IMGUI] to find the changes.
+
+// stb_rect_pack.h - v0.99 - public domain - rectangle packing
+// Sean Barrett 2014
+//
+// Useful for e.g. packing rectangular textures into an atlas.
+// Does not do rotation.
+//
+// Not necessarily the awesomest packing method, but better than
+// the totally naive one in stb_truetype (which is primarily what
+// this is meant to replace).
+//
+// Has only had a few tests run, may have issues.
+//
+// More docs to come.
+//
+// No memory allocations; uses qsort() and assert() from stdlib.
+// Can override those by defining STBRP_SORT and STBRP_ASSERT.
+//
+// This library currently uses the Skyline Bottom-Left algorithm.
+//
+// Please note: better rectangle packers are welcome! Please
+// implement them to the same API, but with a different init
+// function.
+//
+// Credits
+//
+//  Library
+//    Sean Barrett
+//  Minor features
+//    Martins Mozeiko
+//    github:IntellectualKitty
+//    
+//  Bugfixes / warning fixes
+//    Jeremy Jaussaud
+//
+// Version history:
+//
+//     0.99  (2019-02-07)  warning fixes
+//     0.11  (2017-03-03)  return packing success/fail result
+//     0.10  (2016-10-25)  remove cast-away-const to avoid warnings
+//     0.09  (2016-08-27)  fix compiler warnings
+//     0.08  (2015-09-13)  really fix bug with empty rects (w=0 or h=0)
+//     0.07  (2015-09-13)  fix bug with empty rects (w=0 or h=0)
+//     0.06  (2015-04-15)  added STBRP_SORT to allow replacing qsort
+//     0.05:  added STBRP_ASSERT to allow replacing assert
+//     0.04:  fixed minor bug in STBRP_LARGE_RECTS support
+//     0.01:  initial release
+//
+// LICENSE
+//
+//   See end of file for license information.
+
+//////////////////////////////////////////////////////////////////////////////
+//
+//       INCLUDE SECTION
+//
+
+#ifndef STB_INCLUDE_STB_RECT_PACK_H
+#define STB_INCLUDE_STB_RECT_PACK_H
+
+#define STB_RECT_PACK_VERSION  1
+
+#ifdef STBRP_STATIC
+#define STBRP_DEF static
+#else
+#define STBRP_DEF extern
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct stbrp_context stbrp_context;
+typedef struct stbrp_node    stbrp_node;
+typedef struct stbrp_rect    stbrp_rect;
+
+#ifdef STBRP_LARGE_RECTS
+typedef int            stbrp_coord;
+#else
+typedef unsigned short stbrp_coord;
+#endif
+
+STBRP_DEF int stbrp_pack_rects (stbrp_context *context, stbrp_rect *rects, int num_rects);
+// Assign packed locations to rectangles. The rectangles are of type
+// 'stbrp_rect' defined below, stored in the array 'rects', and there
+// are 'num_rects' many of them.
+//
+// Rectangles which are successfully packed have the 'was_packed' flag
+// set to a non-zero value and 'x' and 'y' store the minimum location
+// on each axis (i.e. bottom-left in cartesian coordinates, top-left
+// if you imagine y increasing downwards). Rectangles which do not fit
+// have the 'was_packed' flag set to 0.
+//
+// You should not try to access the 'rects' array from another thread
+// while this function is running, as the function temporarily reorders
+// the array while it executes.
+//
+// To pack into another rectangle, you need to call stbrp_init_target
+// again. To continue packing into the same rectangle, you can call
+// this function again. Calling this multiple times with multiple rect
+// arrays will probably produce worse packing results than calling it
+// a single time with the full rectangle array, but the option is
+// available.
+//
+// The function returns 1 if all of the rectangles were successfully
+// packed and 0 otherwise.
+
+struct stbrp_rect
+{
+   // reserved for your use:
+   int            id;
+
+   // input:
+   stbrp_coord    w, h;
+
+   // output:
+   stbrp_coord    x, y;
+   int            was_packed;  // non-zero if valid packing
+
+}; // 16 bytes, nominally
+
+
+STBRP_DEF void stbrp_init_target (stbrp_context *context, int width, int height, stbrp_node *nodes, int num_nodes);
+// Initialize a rectangle packer to:
+//    pack a rectangle that is 'width' by 'height' in dimensions
+//    using temporary storage provided by the array 'nodes', which is 'num_nodes' long
+//
+// You must call this function every time you start packing into a new target.
+//
+// There is no "shutdown" function. The 'nodes' memory must stay valid for
+// the following stbrp_pack_rects() call (or calls), but can be freed after
+// the call (or calls) finish.
+//
+// Note: to guarantee best results, either:
+//       1. make sure 'num_nodes' >= 'width'
+//   or  2. call stbrp_allow_out_of_mem() defined below with 'allow_out_of_mem = 1'
+//
+// If you don't do either of the above things, widths will be quantized to multiples
+// of small integers to guarantee the algorithm doesn't run out of temporary storage.
+//
+// If you do #2, then the non-quantized algorithm will be used, but the algorithm
+// may run out of temporary storage and be unable to pack some rectangles.
+
+STBRP_DEF void stbrp_setup_allow_out_of_mem (stbrp_context *context, int allow_out_of_mem);
+// Optionally call this function after init but before doing any packing to
+// change the handling of the out-of-temp-memory scenario, described above.
+// If you call init again, this will be reset to the default (false).
+
+
+STBRP_DEF void stbrp_setup_heuristic (stbrp_context *context, int heuristic);
+// Optionally select which packing heuristic the library should use. Different
+// heuristics will produce better/worse results for different data sets.
+// If you call init again, this will be reset to the default.
+
+enum
+{
+   STBRP_HEURISTIC_Skyline_default=0,
+   STBRP_HEURISTIC_Skyline_BL_sortHeight = STBRP_HEURISTIC_Skyline_default,
+   STBRP_HEURISTIC_Skyline_BF_sortHeight
+};
+
+
+//////////////////////////////////////////////////////////////////////////////
+//
+// the details of the following structures don't matter to you, but they must
+// be visible so you can handle the memory allocations for them
+
+struct stbrp_node
+{
+   stbrp_coord  x,y;
+   stbrp_node  *next;
+};
+
+struct stbrp_context
+{
+   int width;
+   int height;
+   int align;
+   int init_mode;
+   int heuristic;
+   int num_nodes;
+   stbrp_node *active_head;
+   stbrp_node *free_head;
+   stbrp_node extra[2]; // we allocate two extra nodes so optimal user-node-count is 'width' not 'width+2'
+};
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+
+//////////////////////////////////////////////////////////////////////////////
+//
+//     IMPLEMENTATION SECTION
+//
+
+#ifdef STB_RECT_PACK_IMPLEMENTATION
+#ifndef STBRP_SORT
+#include <stdlib.h>
+#define STBRP_SORT qsort
+#endif
+
+#ifndef STBRP_ASSERT
+#include <assert.h>
+#define STBRP_ASSERT assert
+#endif
+
+// [DEAR IMGUI] Added STBRP__CDECL
+#ifdef _MSC_VER
+#define STBRP__NOTUSED(v)  (void)(v)
+#define STBRP__CDECL __cdecl
+#else
+#define STBRP__NOTUSED(v)  (void)sizeof(v)
+#define STBRP__CDECL
+#endif
+
+enum
+{
+   STBRP__INIT_skyline = 1
+};
+
+STBRP_DEF void stbrp_setup_heuristic(stbrp_context *context, int heuristic)
+{
+   switch (context->init_mode) {
+      case STBRP__INIT_skyline:
+         STBRP_ASSERT(heuristic == STBRP_HEURISTIC_Skyline_BL_sortHeight || heuristic == STBRP_HEURISTIC_Skyline_BF_sortHeight);
+         context->heuristic = heuristic;
+         break;
+      default:
+         STBRP_ASSERT(0);
+   }
+}
+
+STBRP_DEF void stbrp_setup_allow_out_of_mem(stbrp_context *context, int allow_out_of_mem)
+{
+   if (allow_out_of_mem)
+      // if it's ok to run out of memory, then don't bother aligning them;
+      // this gives better packing, but may fail due to OOM (even though
+      // the rectangles easily fit). @TODO a smarter approach would be to only
+      // quantize once we've hit OOM, then we could get rid of this parameter.
+      context->align = 1;
+   else {
+      // if it's not ok to run out of memory, then quantize the widths
+      // so that num_nodes is always enough nodes.
+      //
+      // I.e. num_nodes * align >= width
+      //                  align >= width / num_nodes
+      //                  align = ceil(width/num_nodes)
+
+      context->align = (context->width + context->num_nodes-1) / context->num_nodes;
+   }
+}
+
+STBRP_DEF void stbrp_init_target(stbrp_context *context, int width, int height, stbrp_node *nodes, int num_nodes)
+{
+   int i;
+#ifndef STBRP_LARGE_RECTS
+   STBRP_ASSERT(width <= 0xffff && height <= 0xffff);
+#endif
+
+   for (i=0; i < num_nodes-1; ++i)
+      nodes[i].next = &nodes[i+1];
+   nodes[i].next = NULL;
+   context->init_mode = STBRP__INIT_skyline;
+   context->heuristic = STBRP_HEURISTIC_Skyline_default;
+   context->free_head = &nodes[0];
+   context->active_head = &context->extra[0];
+   context->width = width;
+   context->height = height;
+   context->num_nodes = num_nodes;
+   stbrp_setup_allow_out_of_mem(context, 0);
+
+   // node 0 is the full width, node 1 is the sentinel (lets us not store width explicitly)
+   context->extra[0].x = 0;
+   context->extra[0].y = 0;
+   context->extra[0].next = &context->extra[1];
+   context->extra[1].x = (stbrp_coord) width;
+#ifdef STBRP_LARGE_RECTS
+   context->extra[1].y = (1<<30);
+#else
+   context->extra[1].y = 65535;
+#endif
+   context->extra[1].next = NULL;
+}
+
+// find minimum y position if it starts at x1
+static int stbrp__skyline_find_min_y(stbrp_context *c, stbrp_node *first, int x0, int width, int *pwaste)
+{
+   stbrp_node *node = first;
+   int x1 = x0 + width;
+   int min_y, visited_width, waste_area;
+
+   STBRP__NOTUSED(c);
+
+   STBRP_ASSERT(first->x <= x0);
+
+   #if 0
+   // skip in case we're past the node
+   while (node->next->x <= x0)
+      ++node;
+   #else
+   STBRP_ASSERT(node->next->x > x0); // we ended up handling this in the caller for efficiency
+   #endif
+
+   STBRP_ASSERT(node->x <= x0);
+
+   min_y = 0;
+   waste_area = 0;
+   visited_width = 0;
+   while (node->x < x1) {
+      if (node->y > min_y) {
+         // raise min_y higher.
+         // we've accounted for all waste up to min_y,
+         // but we'll now add more waste for everything we've visted
+         waste_area += visited_width * (node->y - min_y);
+         min_y = node->y;
+         // the first time through, visited_width might be reduced
+         if (node->x < x0)
+            visited_width += node->next->x - x0;
+         else
+            visited_width += node->next->x - node->x;
+      } else {
+         // add waste area
+         int under_width = node->next->x - node->x;
+         if (under_width + visited_width > width)
+            under_width = width - visited_width;
+         waste_area += under_width * (min_y - node->y);
+         visited_width += under_width;
+      }
+      node = node->next;
+   }
+
+   *pwaste = waste_area;
+   return min_y;
+}
+
+typedef struct
+{
+   int x,y;
+   stbrp_node **prev_link;
+} stbrp__findresult;
+
+static stbrp__findresult stbrp__skyline_find_best_pos(stbrp_context *c, int width, int height)
+{
+   int best_waste = (1<<30), best_x, best_y = (1 << 30);
+   stbrp__findresult fr;
+   stbrp_node **prev, *node, *tail, **best = NULL;
+
+   // align to multiple of c->align
+   width = (width + c->align - 1);
+   width -= width % c->align;
+   STBRP_ASSERT(width % c->align == 0);
+
+   node = c->active_head;
+   prev = &c->active_head;
+   while (node->x + width <= c->width) {
+      int y,waste;
+      y = stbrp__skyline_find_min_y(c, node, node->x, width, &waste);
+      if (c->heuristic == STBRP_HEURISTIC_Skyline_BL_sortHeight) { // actually just want to test BL
+         // bottom left
+         if (y < best_y) {
+            best_y = y;
+            best = prev;
+         }
+      } else {
+         // best-fit
+         if (y + height <= c->height) {
+            // can only use it if it first vertically
+            if (y < best_y || (y == best_y && waste < best_waste)) {
+               best_y = y;
+               best_waste = waste;
+               best = prev;
+            }
+         }
+      }
+      prev = &node->next;
+      node = node->next;
+   }
+
+   best_x = (best == NULL) ? 0 : (*best)->x;
+
+   // if doing best-fit (BF), we also have to try aligning right edge to each node position
+   //
+   // e.g, if fitting
+   //
+   //     ____________________
+   //    |____________________|
+   //
+   //            into
+   //
+   //   |                         |
+   //   |             ____________|
+   //   |____________|
+   //
+   // then right-aligned reduces waste, but bottom-left BL is always chooses left-aligned
+   //
+   // This makes BF take about 2x the time
+
+   if (c->heuristic == STBRP_HEURISTIC_Skyline_BF_sortHeight) {
+      tail = c->active_head;
+      node = c->active_head;
+      prev = &c->active_head;
+      // find first node that's admissible
+      while (tail->x < width)
+         tail = tail->next;
+      while (tail) {
+         int xpos = tail->x - width;
+         int y,waste;
+         STBRP_ASSERT(xpos >= 0);
+         // find the left position that matches this
+         while (node->next->x <= xpos) {
+            prev = &node->next;
+            node = node->next;
+         }
+         STBRP_ASSERT(node->next->x > xpos && node->x <= xpos);
+         y = stbrp__skyline_find_min_y(c, node, xpos, width, &waste);
+         if (y + height < c->height) {
+            if (y <= best_y) {
+               if (y < best_y || waste < best_waste || (waste==best_waste && xpos < best_x)) {
+                  best_x = xpos;
+                  STBRP_ASSERT(y <= best_y);
+                  best_y = y;
+                  best_waste = waste;
+                  best = prev;
+               }
+            }
+         }
+         tail = tail->next;
+      }         
+   }
+
+   fr.prev_link = best;
+   fr.x = best_x;
+   fr.y = best_y;
+   return fr;
+}
+
+static stbrp__findresult stbrp__skyline_pack_rectangle(stbrp_context *context, int width, int height)
+{
+   // find best position according to heuristic
+   stbrp__findresult res = stbrp__skyline_find_best_pos(context, width, height);
+   stbrp_node *node, *cur;
+
+   // bail if:
+   //    1. it failed
+   //    2. the best node doesn't fit (we don't always check this)
+   //    3. we're out of memory
+   if (res.prev_link == NULL || res.y + height > context->height || context->free_head == NULL) {
+      res.prev_link = NULL;
+      return res;
+   }
+
+   // on success, create new node
+   node = context->free_head;
+   node->x = (stbrp_coord) res.x;
+   node->y = (stbrp_coord) (res.y + height);
+
+   context->free_head = node->next;
+
+   // insert the new node into the right starting point, and
+   // let 'cur' point to the remaining nodes needing to be
+   // stiched back in
+
+   cur = *res.prev_link;
+   if (cur->x < res.x) {
+      // preserve the existing one, so start testing with the next one
+      stbrp_node *next = cur->next;
+      cur->next = node;
+      cur = next;
+   } else {
+      *res.prev_link = node;
+   }
+
+   // from here, traverse cur and free the nodes, until we get to one
+   // that shouldn't be freed
+   while (cur->next && cur->next->x <= res.x + width) {
+      stbrp_node *next = cur->next;
+      // move the current node to the free list
+      cur->next = context->free_head;
+      context->free_head = cur;
+      cur = next;
+   }
+
+   // stitch the list back in
+   node->next = cur;
+
+   if (cur->x < res.x + width)
+      cur->x = (stbrp_coord) (res.x + width);
+
+#ifdef _DEBUG
+   cur = context->active_head;
+   while (cur->x < context->width) {
+      STBRP_ASSERT(cur->x < cur->next->x);
+      cur = cur->next;
+   }
+   STBRP_ASSERT(cur->next == NULL);
+
+   {
+      int count=0;
+      cur = context->active_head;
+      while (cur) {
+         cur = cur->next;
+         ++count;
+      }
+      cur = context->free_head;
+      while (cur) {
+         cur = cur->next;
+         ++count;
+      }
+      STBRP_ASSERT(count == context->num_nodes+2);
+   }
+#endif
+
+   return res;
+}
+
+// [DEAR IMGUI] Added STBRP__CDECL
+static int STBRP__CDECL rect_height_compare(const void *a, const void *b)
+{
+   const stbrp_rect *p = (const stbrp_rect *) a;
+   const stbrp_rect *q = (const stbrp_rect *) b;
+   if (p->h > q->h)
+      return -1;
+   if (p->h < q->h)
+      return  1;
+   return (p->w > q->w) ? -1 : (p->w < q->w);
+}
+
+// [DEAR IMGUI] Added STBRP__CDECL
+static int STBRP__CDECL rect_original_order(const void *a, const void *b)
+{
+   const stbrp_rect *p = (const stbrp_rect *) a;
+   const stbrp_rect *q = (const stbrp_rect *) b;
+   return (p->was_packed < q->was_packed) ? -1 : (p->was_packed > q->was_packed);
+}
+
+#ifdef STBRP_LARGE_RECTS
+#define STBRP__MAXVAL  0xffffffff
+#else
+#define STBRP__MAXVAL  0xffff
+#endif
+
+STBRP_DEF int stbrp_pack_rects(stbrp_context *context, stbrp_rect *rects, int num_rects)
+{
+   int i, all_rects_packed = 1;
+
+   // we use the 'was_packed' field internally to allow sorting/unsorting
+   for (i=0; i < num_rects; ++i) {
+      rects[i].was_packed = i;
+   }
+
+   // sort according to heuristic
+   STBRP_SORT(rects, num_rects, sizeof(rects[0]), rect_height_compare);
+
+   for (i=0; i < num_rects; ++i) {
+      if (rects[i].w == 0 || rects[i].h == 0) {
+         rects[i].x = rects[i].y = 0;  // empty rect needs no space
+      } else {
+         stbrp__findresult fr = stbrp__skyline_pack_rectangle(context, rects[i].w, rects[i].h);
+         if (fr.prev_link) {
+            rects[i].x = (stbrp_coord) fr.x;
+            rects[i].y = (stbrp_coord) fr.y;
+         } else {
+            rects[i].x = rects[i].y = STBRP__MAXVAL;
+         }
+      }
+   }
+
+   // unsort
+   STBRP_SORT(rects, num_rects, sizeof(rects[0]), rect_original_order);
+
+   // set was_packed flags and all_rects_packed status
+   for (i=0; i < num_rects; ++i) {
+      rects[i].was_packed = !(rects[i].x == STBRP__MAXVAL && rects[i].y == STBRP__MAXVAL);
+      if (!rects[i].was_packed)
+         all_rects_packed = 0;
+   }
+
+   // return the all_rects_packed status
+   return all_rects_packed;
+}
+#endif
+
+/*
+------------------------------------------------------------------------------
+This software is available under 2 licenses -- choose whichever you prefer.
+------------------------------------------------------------------------------
+ALTERNATIVE A - MIT License
+Copyright (c) 2017 Sean Barrett
+Permission is hereby granted, free of charge, to any person obtaining a copy of 
+this software and associated documentation files (the "Software"), to deal in 
+the Software without restriction, including without limitation the rights to 
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies 
+of the Software, and to permit persons to whom the Software is furnished to do 
+so, subject to the following conditions:
+The above copyright notice and this permission notice shall be included in all 
+copies or substantial portions of the Software.
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 
+SOFTWARE.
+------------------------------------------------------------------------------
+ALTERNATIVE B - Public Domain (www.unlicense.org)
+This is free and unencumbered software released into the public domain.
+Anyone is free to copy, modify, publish, use, compile, sell, or distribute this 
+software, either in source code form or as a compiled binary, for any purpose, 
+commercial or non-commercial, and by any means.
+In jurisdictions that recognize copyright laws, the author or authors of this 
+software dedicate any and all copyright interest in the software to the public 
+domain. We make this dedication for the benefit of the public at large and to 
+the detriment of our heirs and successors. We intend this dedication to be an 
+overt act of relinquishment in perpetuity of all present and future rights to 
+this software under copyright law.
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
+AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 
+ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+------------------------------------------------------------------------------
+*/

build_steamos.sh

@@ -7,10 +7,10 @@ mkdir -p linux/tools
 cp scripts/find_interfaces.sh linux/tools/
 cp scripts/steamclient_loader.sh linux/tools/
 ../protobuf/prefix_x86/bin/protoc -I./dll/ --cpp_out=./dll/ ./dll/*.proto
-g++ -m32 -shared -fPIC -fvisibility=hidden -Wl,--exclude-libs,ALL -DGNUC -DEMU_RELEASE_BUILD -DNDEBUG -DCONTROLLER_SUPPORT -s -o linux/x86/libsteam_api.so dll/*.cpp dll/*.cc controller/*.c -Wno-return-type -I../protobuf/prefix_x86/include/ -L../protobuf/prefix_x86/lib/ -lprotobuf-lite -std=c++11 && echo built32
+g++ -m32 -shared -fPIC -fvisibility=hidden -Wl,--exclude-libs,ALL -DGNUC -DNO_OVERLAY -DEMU_RELEASE_BUILD -DNDEBUG -s -o linux/x86/libsteam_api.so dll/*.cpp dll/*.cc -Wno-return-type -I../protobuf/prefix_x86/include/ -L../protobuf/prefix_x86/lib/ -lprotobuf-lite -std=c++11 && echo built32
-g++ -m32 -fvisibility=hidden -Wl,--exclude-libs,ALL -DGNUC -DEMU_RELEASE_BUILD -DNDEBUG -DNO_DISK_WRITES -DLOBBY_CONNECT -s -o linux/lobby_connect/lobby_connect_x86 lobby_connect.cpp dll/*.cpp dll/*.cc -Wno-return-type -I../protobuf/prefix_x86/include/ -L../protobuf/prefix_x86/lib/ -lprotobuf-lite -lpthread -std=c++11 && echo built_lobby_connect32
+g++ -m32 -shared -fPIC -fvisibility=hidden -Wl,--exclude-libs,ALL -DGNUC -DNO_OVERLAY -DEMU_RELEASE_BUILD -DSTEAMCLIENT_DLL -DNDEBUG -s -o linux/x86/steamclient.so dll/*.cpp dll/*.cc -Wno-return-type -I../protobuf/prefix_x86/include/ -L../protobuf/prefix_x86/lib/ -lprotobuf-lite -std=c++11 && echo built32_steamclient
-g++ -m32 -shared -fPIC -fvisibility=hidden -Wl,--exclude-libs,ALL -DGNUC -DEMU_RELEASE_BUILD -DSTEAMCLIENT_DLL -DNDEBUG -DCONTROLLER_SUPPORT -s -o linux/x86/steamclient.so dll/*.cpp dll/*.cc controller/*.c -Wno-return-type -I../protobuf/prefix_x86/include/ -L../protobuf/prefix_x86/lib/ -lprotobuf-lite -std=c++11 && echo built32_steamclient
+g++ -m32 -fvisibility=hidden -Wl,--exclude-libs,ALL -DGNUC -DNO_OVERLAY -DEMU_RELEASE_BUILD -DNDEBUG -DNO_DISK_WRITES -DLOBBY_CONNECT -s -o linux/lobby_connect/lobby_connect_x86 lobby_connect.cpp dll/*.cpp dll/*.cc -Wno-return-type -I../protobuf/prefix_x86/include/ -L../protobuf/prefix_x86/lib/ -lprotobuf-lite -lpthread -std=c++11 && echo built_lobby_connect32
 ../protobuf/prefix/bin/protoc -I./dll/ --cpp_out=./dll/ ./dll/*.proto
-g++ -shared -fPIC -fvisibility=hidden -Wl,--exclude-libs,ALL -DGNUC -DEMU_RELEASE_BUILD -DNDEBUG -DCONTROLLER_SUPPORT -s -o linux/x86_64/libsteam_api.so dll/*.cpp dll/*.cc controller/*.c -Wno-return-type -I../protobuf/prefix/include/ -L../protobuf/prefix/lib/ -lprotobuf-lite -std=c++11 && echo built64
+g++ -shared -fPIC -fvisibility=hidden -Wl,--exclude-libs,ALL -DGNUC -DNO_OVERLAY -DEMU_RELEASE_BUILD -DNDEBUG -s -o linux/x86_64/libsteam_api.so dll/*.cpp dll/*.cc -Wno-return-type -I../protobuf/prefix/include/ -L../protobuf/prefix/lib/ -lprotobuf-lite -std=c++11 && echo built64
-g++ -fvisibility=hidden -Wl,--exclude-libs,ALL -DGNUC -DEMU_RELEASE_BUILD -DNDEBUG -DNO_DISK_WRITES -DLOBBY_CONNECT -s -o linux/lobby_connect/lobby_connect_x64 lobby_connect.cpp dll/*.cpp dll/*.cc -Wno-return-type -I../protobuf/prefix/include/ -L../protobuf/prefix/lib/ -lprotobuf-lite -lpthread -std=c++11 && echo built_lobby_connect64
+g++ -shared -fPIC -fvisibility=hidden -Wl,--exclude-libs,ALL -DGNUC -DNO_OVERLAY -DEMU_RELEASE_BUILD -DSTEAMCLIENT_DLL -DNDEBUG -s -o linux/x86_64/steamclient.so dll/*.cpp dll/*.cc -Wno-return-type -I../protobuf/prefix/include/ -L../protobuf/prefix/lib/ -lprotobuf-lite -std=c++11 && echo built64_steamclient
-g++ -shared -fPIC -fvisibility=hidden -Wl,--exclude-libs,ALL -DGNUC -DEMU_RELEASE_BUILD -DSTEAMCLIENT_DLL -DNDEBUG -DCONTROLLER_SUPPORT -s -o linux/x86_64/steamclient.so dll/*.cpp dll/*.cc controller/*.c -Wno-return-type -I../protobuf/prefix/include/ -L../protobuf/prefix/lib/ -lprotobuf-lite -std=c++11 && echo built64_steamclient
+g++ -fvisibility=hidden -Wl,--exclude-libs,ALL -DGNUC -DNO_OVERLAY -DEMU_RELEASE_BUILD -DNDEBUG -DNO_DISK_WRITES -DLOBBY_CONNECT -s -o linux/lobby_connect/lobby_connect_x64 lobby_connect.cpp dll/*.cpp dll/*.cc -Wno-return-type -I../protobuf/prefix/include/ -L../protobuf/prefix/lib/ -lprotobuf-lite -lpthread -std=c++11 && echo built_lobby_connect64

build_win_debug_experimental.bat

@@ -4,13 +4,13 @@ call build_set_protobuf_directories.bat
 "%PROTOC_X86_EXE%" -I.\dll\ --cpp_out=.\dll\ .\dll\net.proto
 call build_env_x86.bat
 cl dll/rtlgenrandom.c dll/rtlgenrandom.def
-cl /LD /I%PROTOBUF_X86_DIRECTORY%\include\ /DEMU_EXPERIMENTAL_BUILD /DCONTROLLER_SUPPORT dll/*.cpp dll/*.cc detours/*.cpp controller/gamepad.c "%PROTOBUF_X86_LIBRARY%" Iphlpapi.lib Ws2_32.lib rtlgenrandom.lib Shell32.lib /EHsc /MP12 /link /OUT:steam_api.dll
+cl /LD /IImGui /Iglew\include /I%PROTOBUF_X86_DIRECTORY%\include\ /DGLEW_STATIC /DEMU_EXPERIMENTAL_BUILD /DCONTROLLER_SUPPORT dll/*.cpp dll/*.cc detours/*.cpp controller/gamepad.c ImGui/*.cpp ImGui/impls/*.cpp ImGui/impls/windows/*.cpp overlay_experimental/*.cpp overlay_experimental/windows/*.cpp "%PROTOBUF_X86_LIBRARY%" glew\lib\Release\Win32\glew32s.lib opengl32.lib Iphlpapi.lib Ws2_32.lib rtlgenrandom.lib Shell32.lib Winmm.lib /EHsc /MP12 /link /OUT:steam_api.dll
 cl /LD steamclient.cpp /EHsc /MP12 /link /OUT:steamclient.dll
 cl /LD steamnetworkingsockets.cpp /EHsc /MP12 /link /OUT:steamnetworkingsockets.dll
 
 "%PROTOC_X64_EXE%" -I.\dll\ --cpp_out=.\dll\ .\dll\net.proto
 call build_env_x64.bat
 cl dll/rtlgenrandom.c dll/rtlgenrandom.def
-cl /LD /I%PROTOBUF_X64_DIRECTORY%\include\ /DEMU_EXPERIMENTAL_BUILD /DCONTROLLER_SUPPORT dll/*.cpp dll/*.cc detours/*.cpp controller/gamepad.c "%PROTOBUF_X64_LIBRARY%" Iphlpapi.lib Ws2_32.lib rtlgenrandom.lib Shell32.lib /EHsc /MP12 /link /OUT:steam_api64.dll
+cl /LD /IImGui /Iglew\include /I%PROTOBUF_X64_DIRECTORY%\include\ /DGLEW_STATIC /DEMU_EXPERIMENTAL_BUILD /DCONTROLLER_SUPPORT dll/*.cpp dll/*.cc detours/*.cpp controller/gamepad.c ImGui/*.cpp ImGui/impls/*.cpp ImGui/impls/windows/*.cpp overlay_experimental/*.cpp overlay_experimental/windows/*.cpp "%PROTOBUF_X64_LIBRARY%" glew\lib\Release\x64\glew32s.lib opengl32.lib Iphlpapi.lib Ws2_32.lib rtlgenrandom.lib Shell32.lib Winmm.lib /EHsc /MP12 /link /OUT:steam_api64.dll
 cl /LD steamclient.cpp /EHsc /MP12 /link /OUT:steamclient64.dll
 cl /LD steamnetworkingsockets.cpp /EHsc /MP12 /link /OUT:steamnetworkingsockets64.dll

build_win_lobby_connect.bat

@@ -6,7 +6,7 @@ call build_set_protobuf_directories.bat
 "%PROTOC_X86_EXE%" -I.\dll\ --cpp_out=.\dll\ .\dll\net.proto
 call build_env_x86.bat
 cl dll/rtlgenrandom.c dll/rtlgenrandom.def
-cl /DNO_DISK_WRITES /DLOBBY_CONNECT /DEMU_RELEASE_BUILD /DNDEBUG /I%PROTOBUF_X86_DIRECTORY%\include\ lobby_connect.cpp dll/*.cpp dll/*.cc "%PROTOBUF_X86_LIBRARY%" Iphlpapi.lib Ws2_32.lib rtlgenrandom.lib Shell32.lib Comdlg32.lib /EHsc /MP12 /Ox /link /debug:none /OUT:release\lobby_connect\lobby_connect.exe
+cl /DNO_OVERLAY /DNO_DISK_WRITES /DLOBBY_CONNECT /DEMU_RELEASE_BUILD /DNDEBUG /I%PROTOBUF_X86_DIRECTORY%\include\ lobby_connect.cpp dll/*.cpp dll/*.cc "%PROTOBUF_X86_LIBRARY%" Iphlpapi.lib Ws2_32.lib rtlgenrandom.lib Shell32.lib Comdlg32.lib /EHsc /MP12 /Ox /link /debug:none /OUT:release\lobby_connect\lobby_connect.exe
 del /Q /S release\lobby_connect\*.lib
 del /Q /S release\lobby_connect\*.exp
 copy Readme_lobby_connect.txt release\lobby_connect\Readme.txt

build_win_release.bat

@@ -10,12 +10,12 @@ call build_set_protobuf_directories.bat
 "%PROTOC_X86_EXE%" -I.\dll\ --cpp_out=.\dll\ .\dll\net.proto
 call build_env_x86.bat
 cl dll/rtlgenrandom.c dll/rtlgenrandom.def
-cl /LD /DEMU_RELEASE_BUILD /DNDEBUG /I%PROTOBUF_X86_DIRECTORY%\include\ dll/*.cpp dll/*.cc "%PROTOBUF_X86_LIBRARY%" Iphlpapi.lib Ws2_32.lib rtlgenrandom.lib Shell32.lib /EHsc /MP12 /Ox /link /debug:none /OUT:release\steam_api.dll
+cl /LD /DNO_OVERLAY /DEMU_RELEASE_BUILD /DNDEBUG /I%PROTOBUF_X86_DIRECTORY%\include\ dll/*.cpp dll/*.cc "%PROTOBUF_X86_LIBRARY%" Iphlpapi.lib Ws2_32.lib rtlgenrandom.lib Shell32.lib /EHsc /MP12 /Ox /link /debug:none /OUT:release\steam_api.dll
-call build_set_protobuf_directories.bat
+
 "%PROTOC_X64_EXE%" -I.\dll\ --cpp_out=.\dll\ .\dll\net.proto
 call build_env_x64.bat
 cl dll/rtlgenrandom.c dll/rtlgenrandom.def
-cl /LD /DEMU_RELEASE_BUILD /DNDEBUG /I%PROTOBUF_X64_DIRECTORY%\include\ dll/*.cpp dll/*.cc "%PROTOBUF_X64_LIBRARY%" Iphlpapi.lib Ws2_32.lib rtlgenrandom.lib Shell32.lib /EHsc /MP12 /Ox /link /debug:none /OUT:release\steam_api64.dll
+cl /LD /DNO_OVERLAY /DEMU_RELEASE_BUILD /DNDEBUG /I%PROTOBUF_X64_DIRECTORY%\include\ dll/*.cpp dll/*.cc "%PROTOBUF_X64_LIBRARY%" Iphlpapi.lib Ws2_32.lib rtlgenrandom.lib Shell32.lib /EHsc /MP12 /Ox /link /debug:none /OUT:release\steam_api64.dll
 copy Readme_release.txt release\Readme.txt
 xcopy /s files_example\* release\
 call build_win_release_experimental.bat

build_win_release_experimental.bat

@@ -6,11 +6,11 @@ call build_set_protobuf_directories.bat
 "%PROTOC_X86_EXE%" -I.\dll\ --cpp_out=.\dll\ .\dll\net.proto
 call build_env_x86.bat
 cl dll/rtlgenrandom.c dll/rtlgenrandom.def
-cl /LD /DEMU_RELEASE_BUILD /DEMU_EXPERIMENTAL_BUILD /DCONTROLLER_SUPPORT /DNDEBUG /I%PROTOBUF_X86_DIRECTORY%\include\ dll/*.cpp dll/*.cc detours/*.cpp controller/gamepad.c "%PROTOBUF_X86_LIBRARY%" Iphlpapi.lib Ws2_32.lib rtlgenrandom.lib Shell32.lib /EHsc /MP12 /Ox /link /debug:none /OUT:release\experimental\steam_api.dll
+cl /LD /DEMU_RELEASE_BUILD /DEMU_EXPERIMENTAL_BUILD /DGLEW_STATIC /DCONTROLLER_SUPPORT /DNDEBUG /IImGui /Iglew\include /I%PROTOBUF_X86_DIRECTORY%\include\ dll/*.cpp dll/*.cc detours/*.cpp controller/gamepad.c ImGui/*.cpp ImGui/impls/*.cpp ImGui/impls/windows/*.cpp overlay_experimental/*.cpp overlay_experimental/windows/*.cpp "%PROTOBUF_X86_LIBRARY%" glew\lib\Release\Win32\glew32s.lib opengl32.lib Iphlpapi.lib Ws2_32.lib rtlgenrandom.lib Shell32.lib Winmm.lib /EHsc /MP12 /Ox /link /debug:none /OUT:release\experimental\steam_api.dll
 cl /LD /DEMU_RELEASE_BUILD /DEMU_EXPERIMENTAL_BUILD /DNDEBUG steamclient.cpp /EHsc /MP12 /Ox /link /OUT:release\experimental\steamclient.dll
 "%PROTOC_X64_EXE%" -I.\dll\ --cpp_out=.\dll\ .\dll\net.proto
 call build_env_x64.bat
 cl dll/rtlgenrandom.c dll/rtlgenrandom.def
-cl /LD /DEMU_RELEASE_BUILD /DEMU_EXPERIMENTAL_BUILD /DCONTROLLER_SUPPORT /DNDEBUG /I%PROTOBUF_X64_DIRECTORY%\include\ dll/*.cpp dll/*.cc detours/*.cpp controller/gamepad.c "%PROTOBUF_X64_LIBRARY%" Iphlpapi.lib Ws2_32.lib rtlgenrandom.lib Shell32.lib /EHsc /MP12 /Ox /link /debug:none /OUT:release\experimental\steam_api64.dll
+cl /LD /DEMU_RELEASE_BUILD /DEMU_EXPERIMENTAL_BUILD /DGLEW_STATIC /DCONTROLLER_SUPPORT /DNDEBUG /IImGui /Iglew\include /I%PROTOBUF_X64_DIRECTORY%\include\ dll/*.cpp dll/*.cc detours/*.cpp controller/gamepad.c ImGui/*.cpp ImGui/impls/*.cpp ImGui/impls/windows/*.cpp overlay_experimental/*.cpp overlay_experimental/windows/*.cpp "%PROTOBUF_X64_LIBRARY%" glew\lib\Release\x64\glew32s.lib opengl32.lib Iphlpapi.lib Ws2_32.lib rtlgenrandom.lib Shell32.lib Winmm.lib /EHsc /MP12 /Ox /link /debug:none /OUT:release\experimental\steam_api64.dll
 cl /LD /DEMU_RELEASE_BUILD /DEMU_EXPERIMENTAL_BUILD /DNDEBUG steamclient.cpp /EHsc /MP12 /Ox /link /OUT:release\experimental\steamclient64.dll
 copy Readme_experimental.txt release\experimental\Readme.txt

dll/base.h

@@ -18,7 +18,29 @@
 #ifndef BASE_INCLUDE
 #define BASE_INCLUDE
 
-#if defined(WIN32) || defined(_WIN32)
+#if defined(WIN64) || defined(_WIN64) || defined(__MINGW64__)
+    #define __WINDOWS_64__
+#elif defined(WIN32) || defined(_WIN32) || defined(__MINGW32__)
+	#define __WINDOWS_32__
+#endif
+
+#if defined(__WINDOWS_32__) || defined(__WINDOWS_64__)
+	#define __WINDOWS__
+#endif
+
+#if defined(__linux__) || defined(linux)
+    #if defined(__x86_64__)
+        #define __LINUX_64__
+    #else
+        #define __LINUX_32__
+    #endif
+#endif
+
+#if defined(__LINUX_32__) || defined(__LINUX_64__)
+    #define __LINUX__
+#endif
+
+#if defined(__WINDOWS__)
 #define STEAM_WIN32
 #pragma warning( disable : 4716)
 #ifndef NOMINMAX

dll/dll.cpp

@@ -223,6 +223,12 @@ STEAMAPI_API bool S_CALLTYPE SteamAPI_Init()
     load_old_interface_versions();
     user_steam_pipe = get_steam_client()->CreateSteamPipe();
     get_steam_client()->ConnectToGlobalUser(user_steam_pipe);
+
+    Steam_Client* client = get_steam_client();
+#ifndef NO_OVERLAY
+    if( client->enable_overlay )
+        client->steam_overlay->SetupOverlay();
+#endif
     return true;
 }
 

dll/net.proto

@@ -185,6 +185,17 @@ message Friend_Messages {
     }
 }
 
+message Steam_Messages {
+	enum Types {
+		FRIEND_CHAT = 0;
+	}
+
+	Types type = 1;
+	oneof message_data {
+		bytes message = 2;
+	}
+}
+
 message Common_Message {
     uint64 source_id = 1;
     uint64 dest_id = 2;
@@ -200,6 +211,7 @@ message Common_Message {
         Friend_Messages friend_messages = 11;
         Network_Old network_old = 12;
         Networking_Sockets networking_sockets = 13;
+		Steam_Messages steam_messages = 14;
     }
 
     uint32 source_ip = 128;

dll/network.cpp

@@ -574,6 +574,11 @@ void Networking::do_callbacks_message(Common_Message *msg)
         PRINT_DEBUG("has_networking_sockets\n");
         run_callbacks(CALLBACK_ID_NETWORKING_SOCKETS, msg);
     }
+
+    if (msg->has_steam_messages()) {
+        PRINT_DEBUG("has_steam_messages\n");
+        run_callbacks(CALLBACK_ID_STEAM_MESSAGES, msg);
+    }
 }
 
 bool Networking::handle_tcp(Common_Message *msg, struct TCP_Socket &socket)

dll/network.h

@@ -60,6 +60,7 @@ enum Callback_Ids {
     CALLBACK_ID_AUTH_TICKET,
     CALLBACK_ID_FRIEND_MESSAGES,
     CALLBACK_ID_NETWORKING_SOCKETS,
+    CALLBACK_ID_STEAM_MESSAGES,
 
     CALLBACK_IDS_MAX
 };

dll/steam_client.cpp

@@ -46,9 +46,13 @@ static void background_thread(Steam_Client *client)
 
 Steam_Client::Steam_Client()
 {
-
     uint32 appid = create_localstorage_settings(&settings_client, &settings_server, &local_storage);
 
+    {
+        std::ifstream chk_ovlay(Local_Storage::get_program_path() + PATH_SEPARATOR + "disable_overlay.txt", std::ios::in);
+        if (chk_ovlay)
+            enable_overlay = false;
+    }
     network = new Networking(settings_server->get_local_steam_id(), appid, settings_server->get_port(), &(settings_server->custom_broadcasts), settings_server->disable_networking);
 
     callback_results_client = new SteamCallResults();
@@ -59,9 +63,12 @@ Steam_Client::Steam_Client()
 
     PRINT_DEBUG("steam client init: id: %llu server id: %llu appid: %u port: %u \n", settings_client->get_local_steam_id().ConvertToUint64(), settings_server->get_local_steam_id().ConvertToUint64(), appid, settings_server->get_port());
 
+    steam_overlay = new Steam_Overlay(settings_client, callback_results_client, callbacks_client, run_every_runcb, network);
+
     steam_user = new Steam_User(settings_client, local_storage, network, callback_results_client, callbacks_client);
-    steam_friends = new Steam_Friends(settings_client, network, callback_results_client, callbacks_client, run_every_runcb);
+    steam_friends = new Steam_Friends(settings_client, network, callback_results_client, callbacks_client, run_every_runcb, steam_overlay);
-    steam_utils = new Steam_Utils(settings_client, callback_results_client);
+    steam_utils = new Steam_Utils(settings_client, callback_results_client, steam_overlay);
+
     steam_matchmaking = new Steam_Matchmaking(settings_client, network, callback_results_client, callbacks_client, run_every_runcb);
     steam_matchmaking_servers = new Steam_Matchmaking_Servers(settings_client, network);
     steam_user_stats = new Steam_User_Stats(settings_client, local_storage, callback_results_client, callbacks_client);
@@ -90,7 +97,7 @@ Steam_Client::Steam_Client()
 
     PRINT_DEBUG("client init gameserver\n");
     steam_gameserver = new Steam_GameServer(settings_server, network, callbacks_server);
-    steam_gameserver_utils = new Steam_Utils(settings_server, callback_results_server);
+    steam_gameserver_utils = new Steam_Utils(settings_server, callback_results_server, steam_overlay);
     steam_gameserverstats = new Steam_GameServerStats(settings_server, network, callback_results_server, callbacks_server);
     steam_gameserver_networking = new Steam_Networking(settings_server, network, callbacks_server, run_every_runcb);
     steam_gameserver_http = new Steam_HTTP(settings_server, network, callback_results_server, callbacks_server);

dll/steam_client.h

@@ -53,6 +53,8 @@
 #include "steam_gameserverstats.h"
 #include "steam_masterserver_updater.h"
 
+#include "../overlay_experimental/steam_overlay.h"
+
 #include <thread>
 
 enum Steam_Pipe {
@@ -127,6 +129,9 @@ public:
     Steam_Game_Coordinator *steam_gameserver_game_coordinator;
     Steam_Masterserver_Updater *steam_masterserver_updater;
 
+    Steam_Overlay* steam_overlay;
+
+    bool enable_overlay = true;
     bool user_logged_in = false;
     bool server_init = false;
     std::thread background_keepalive;

dll/steam_friends.h

@@ -15,7 +15,11 @@
    License along with the Goldberg Emulator; if not, see
    <http://www.gnu.org/licenses/>.  */
 
+#ifndef __INCLUDED_STEAM_FRIENDS_H__
+#define __INCLUDED_STEAM_FRIENDS_H__
+
 #include "base.h"
+#include "../overlay_experimental/steam_overlay.h"
 
 #define SEND_FRIEND_RATE 4.0
 
@@ -46,6 +50,7 @@ public ISteamFriends
     class SteamCallBacks *callbacks;
     class SteamCallResults *callback_results;
     class RunEveryRunCB *run_every_runcb;
+    class Steam_Overlay* overlay;
 
     Friend us;
     bool modified;
@@ -128,13 +133,14 @@ static void steam_friends_run_every_runcb(void *object)
     steam_friends->RunCallbacks();
 }
 
-Steam_Friends(class Settings *settings, class Networking *network, class SteamCallResults *callback_results, class SteamCallBacks *callbacks, class RunEveryRunCB *run_every_runcb)
+Steam_Friends(Settings* settings, Networking* network, SteamCallResults* callback_results, SteamCallBacks* callbacks, RunEveryRunCB* run_every_runcb, Steam_Overlay* overlay):
+    settings(settings),
+    network(network),
+    callbacks(callbacks),
+    callback_results(callback_results),
+    run_every_runcb(run_every_runcb),
+    overlay(overlay)
 {
-    this->settings = settings;
-    this->network = network;
-    this->callbacks = callbacks;
-    this->callback_results = callback_results;
-    this->run_every_runcb = run_every_runcb;
     this->network->setCallback(CALLBACK_ID_FRIEND, settings->get_local_steam_id(), &Steam_Friends::steam_friends_callback, this);
     this->network->setCallback(CALLBACK_ID_FRIEND_MESSAGES, settings->get_local_steam_id(), &Steam_Friends::steam_friends_callback, this);
     this->network->setCallback(CALLBACK_ID_USER_STATUS, settings->get_local_steam_id(), &Steam_Friends::steam_friends_callback, this);
@@ -518,6 +524,7 @@ void SetInGameVoiceSpeaking( CSteamID steamIDUser, bool bSpeaking )
 void ActivateGameOverlay( const char *pchDialog )
 {
     PRINT_DEBUG("Steam_Friends::ActivateGameOverlay %s\n", pchDialog);
+    overlay->OpenOverlay(pchDialog);
 }
 
 
@@ -574,7 +581,7 @@ void SetPlayedWith( CSteamID steamIDUserPlayedWith )
 void ActivateGameOverlayInviteDialog( CSteamID steamIDLobby )
 {
     PRINT_DEBUG("Steam_Friends::ActivateGameOverlayInviteDialog\n");
-    // TODO: Here open the overlay
+    overlay->OpenOverlayInvite(steamIDLobby);
 }
 
 // gets the small (32x32) avatar of the current user, which is a handle to be used in IClientUtils::GetImageRGBA(), or 0 if none set
@@ -1014,6 +1021,7 @@ void Callback(Common_Message *msg)
             auto f = std::find_if(friends.begin(), friends.end(), [&id](Friend const& item) { return item.id() == id; });
             if (friends.end() != f) {
                 persona_change((uint64)f->id(), k_EPersonaChangeStatus);
+                overlay->FriendDisconnect(*f);
                 friends.erase(f);
             }
         }
@@ -1039,6 +1047,7 @@ void Callback(Common_Message *msg)
         if (!f) {
             if (msg->friend_().id() != settings->get_local_steam_id().ConvertToUint64()) {
                 friends.push_back(msg->friend_());
+                overlay->FriendConnect(msg->friend_());
                 persona_change((uint64)msg->friend_().id(), k_EPersonaChangeName);
             }
         } else {
@@ -1059,16 +1068,31 @@ void Callback(Common_Message *msg)
     if (msg->has_friend_messages()) {
         if (msg->friend_messages().type() == Friend_Messages::LOBBY_INVITE) {
             PRINT_DEBUG("Steam_Friends Got Lobby Invite\n");
+            if (overlay->Ready())
+            {
                 //TODO: the user should accept the invite first but we auto accept it because there's no gui yet
+                // Then we will handle it !
+                overlay->SetLobbyInvite(*find_friend(static_cast<uint64>(msg->source_id())), msg->friend_messages().lobby_id());
+            }
+            else
+            {
                 GameLobbyJoinRequested_t data;
                 data.m_steamIDLobby = CSteamID((uint64)msg->friend_messages().lobby_id());
                 data.m_steamIDFriend = CSteamID((uint64)msg->source_id());
                 callbacks->addCBResult(data.k_iCallback, &data, sizeof(data));
             }
+        }
 
         if (msg->friend_messages().type() == Friend_Messages::GAME_INVITE) {
             PRINT_DEBUG("Steam_Friends Got Game Invite\n");
             //TODO: I'm pretty sure that the user should accept the invite before this is posted but we do like above
+            if (overlay->Ready())
+            {
+                // Then we will handle it !
+                overlay->SetRichInvite(*find_friend(static_cast<uint64>(msg->source_id())), msg->friend_messages().connect_str().c_str());
+            }
+            else
+            {
                 std::string const& connect_str = msg->friend_messages().connect_str();
                 GameRichPresenceJoinRequested_t data = {};
                 data.m_steamIDFriend = CSteamID((uint64)msg->source_id());
@@ -1076,6 +1100,9 @@ void Callback(Common_Message *msg)
                 callbacks->addCBResult(data.k_iCallback, &data, sizeof(data));
             }
         }
+    }
 }
 
 };
+
+#endif//__INCLUDED_STEAM_FRIENDS_H__

dll/steam_matchmaking.h

@@ -1268,7 +1268,7 @@ void Callback(Common_Message *msg)
         if (msg->lobby().owner() != settings->get_local_steam_id().ConvertToUint64() && msg->lobby().appid() == settings->get_local_game_id().AppID()) {
             Lobby *lobby = get_lobby((uint64)msg->lobby().room_id());
             if (!lobby) {
-                unsigned int old_size = lobbies.size();
+                size_t old_size = lobbies.size();
                 lobbies.resize(old_size + 1);
                 lobbies[old_size].set_room_id(msg->lobby().room_id());
                 lobby = &(lobbies[old_size]);

dll/steam_user_stats.cpp

@@ -0,0 +1,829 @@
+/* Copyright (C) 2019 Mr Goldberg
+   This file is part of the Goldberg Emulator
+
+   The Goldberg Emulator is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 3 of the License, or (at your option) any later version.
+
+   The Goldberg Emulator is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the Goldberg Emulator; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include "steam_user_stats.h"
+#include "dll.h"
+
+unsigned int Steam_User_Stats::find_leaderboard(std::string name)
+{
+    unsigned index = 1;
+    for (auto& leaderboard : leaderboards) {
+        if (leaderboard.name == name) return index;
+        ++index;
+    }
+
+    return 0;
+}
+
+void Steam_User_Stats::load_achievements_db()
+{
+    std::string file_path = Local_Storage::get_game_settings_path() + achievements_user_file;
+    local_storage->load_json(file_path, defined_achievements);
+}
+
+void Steam_User_Stats::load_achievements()
+{
+    local_storage->load_json_file("", achievements_user_file, user_achievements);
+}
+
+void Steam_User_Stats::save_achievements()
+{
+    local_storage->write_json_file("", achievements_user_file, user_achievements);
+}
+
+Steam_User_Stats::Steam_User_Stats(Settings *settings, Local_Storage *local_storage, class SteamCallResults *callback_results, class SteamCallBacks *callbacks):
+    settings(settings),
+    local_storage(local_storage),
+    callback_results(callback_results),
+    callbacks(callbacks),
+    defined_achievements(nlohmann::json::object()),
+    user_achievements(nlohmann::json::object())
+{
+    load_achievements_db(); // achievements db
+    load_achievements(); // achievements per user
+}
+
+nlohmann::json const& Steam_User_Stats::GetAchievementsDb() const
+{
+    return defined_achievements;
+}
+
+// Ask the server to send down this user's data and achievements for this game
+STEAM_CALL_BACK(UserStatsReceived_t)
+bool Steam_User_Stats::RequestCurrentStats()
+{
+    PRINT_DEBUG("Steam_User_Stats::RequestCurrentStats\n");
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+
+    UserStatsReceived_t data;
+    data.m_nGameID = settings->get_local_game_id().ToUint64();
+    data.m_eResult = k_EResultOK;
+    data.m_steamIDUser = settings->get_local_steam_id();
+    callbacks->addCBResult(data.k_iCallback, &data, sizeof(data), 0.1);
+    return true;
+}
+
+
+// Data accessors
+bool Steam_User_Stats::GetStat(const char* pchName, int32* pData)
+{
+    PRINT_DEBUG("GetStat int32 %s\n", pchName);
+    if (!pchName || !pData) return false;
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+    auto stats_config = settings->getStats();
+    auto stats_data = stats_config.find(pchName);
+    if (stats_data != stats_config.end()) {
+        if (stats_data->second.type != Stat_Type::STAT_TYPE_INT) return false;
+    }
+
+    int read_data = local_storage->get_data(Local_Storage::stats_storage_folder, pchName, (char*)pData, sizeof(*pData));
+    if (read_data == sizeof(int32))
+        return true;
+
+    if (stats_data != stats_config.end()) {
+        *pData = stats_data->second.default_value_int;
+        return true;
+    }
+
+    return false;
+}
+
+bool Steam_User_Stats::GetStat(const char* pchName, float* pData)
+{
+    PRINT_DEBUG("GetStat float %s\n", pchName);
+    if (!pchName || !pData) return false;
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+    auto stats_config = settings->getStats();
+    auto stats_data = stats_config.find(pchName);
+    if (stats_data != stats_config.end()) {
+        if (stats_data->second.type == Stat_Type::STAT_TYPE_INT) return false;
+    }
+
+    int read_data = local_storage->get_data(Local_Storage::stats_storage_folder, pchName, (char*)pData, sizeof(*pData));
+    if (read_data == sizeof(float))
+        return true;
+
+    if (stats_data != stats_config.end()) {
+        *pData = stats_data->second.default_value_float;
+        return true;
+    }
+
+    return false;
+}
+
+
+// Set / update data
+bool Steam_User_Stats::SetStat(const char* pchName, int32 nData)
+{
+    PRINT_DEBUG("SetStat int32 %s\n", pchName);
+    if (!pchName) return false;
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+
+    return local_storage->store_data(Local_Storage::stats_storage_folder, pchName, (char*)&nData, sizeof(nData)) == sizeof(nData);
+}
+
+bool Steam_User_Stats::SetStat(const char* pchName, float fData)
+{
+    PRINT_DEBUG("SetStat float %s\n", pchName);
+    if (!pchName) return false;
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+
+    return local_storage->store_data(Local_Storage::stats_storage_folder, pchName, (char*)&fData, sizeof(fData)) == sizeof(fData);
+}
+
+bool Steam_User_Stats::UpdateAvgRateStat(const char* pchName, float flCountThisSession, double dSessionLength)
+{
+    PRINT_DEBUG("UpdateAvgRateStat %s\n", pchName);
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+
+    char data[sizeof(float) + sizeof(float) + sizeof(double)];
+    int read_data = local_storage->get_data(Local_Storage::stats_storage_folder, pchName, (char*)data, sizeof(*data));
+    float oldcount = 0;
+    double oldsessionlength = 0;
+    if (read_data == sizeof(data)) {
+        memcpy(&oldcount, data + sizeof(float), sizeof(oldcount));
+        memcpy(&oldsessionlength, data + sizeof(float) + sizeof(double), sizeof(oldsessionlength));
+    }
+
+    oldcount += flCountThisSession;
+    oldsessionlength += dSessionLength;
+
+    float average = oldcount / oldsessionlength;
+    memcpy(data, &average, sizeof(average));
+    memcpy(data + sizeof(float), &oldcount, sizeof(oldcount));
+    memcpy(data + sizeof(float) * 2, &oldsessionlength, sizeof(oldsessionlength));
+
+    return local_storage->store_data(Local_Storage::stats_storage_folder, pchName, data, sizeof(data)) == sizeof(data);
+}
+
+
+// Achievement flag accessors
+bool Steam_User_Stats::GetAchievement(const char* pchName, bool* pbAchieved)
+{
+    PRINT_DEBUG("GetAchievement %s\n", pchName);
+    if (pchName == nullptr) return false;
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+
+    try {
+        auto it = std::find_if(defined_achievements.begin(), defined_achievements.end(), [pchName](nlohmann::json& item) {
+            return item["name"].get<std::string>() == pchName;
+            });
+        auto ach = user_achievements.find(pchName);
+        if (it != defined_achievements.end() && ach != user_achievements.end()) {
+            if (pbAchieved != nullptr) *pbAchieved = (*ach)["earned"];
+            return true;
+        }
+    }
+    catch (...) {}
+
+    if (pbAchieved != nullptr)*pbAchieved = false;
+
+    return false;
+}
+
+bool Steam_User_Stats::SetAchievement(const char* pchName)
+{
+    PRINT_DEBUG("SetAchievement %s\n", pchName);
+    if (pchName == nullptr) return false;
+
+    try {
+        auto it = std::find_if(defined_achievements.begin(), defined_achievements.end(), [pchName](nlohmann::json& item) {
+            return item["name"].get<std::string>() == pchName;
+            });
+        if (it != defined_achievements.end()) {
+            if (user_achievements.find(pchName) == user_achievements.end() || user_achievements[pchName].value("earned", false) == false) {
+                user_achievements[pchName]["earned"] = true;
+                user_achievements[pchName]["earned_time"] = std::chrono::duration_cast<std::chrono::duration<uint32>>(std::chrono::system_clock::now().time_since_epoch()).count();
+#ifndef NO_OVERLAY
+                get_steam_client()->steam_overlay->AddAchievementNotification(it.value());
+#endif
+            }
+            return true;
+        }
+    }
+    catch (...) {}
+
+    return false;
+}
+
+bool Steam_User_Stats::ClearAchievement(const char* pchName)
+{
+    PRINT_DEBUG("ClearAchievement %s\n", pchName);
+    if (pchName == nullptr) return false;
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+
+    try {
+        auto it = std::find_if(defined_achievements.begin(), defined_achievements.end(), [pchName](nlohmann::json& item) {
+            return static_cast<std::string const&>(item["name"]) == pchName;
+            });
+        if (it != defined_achievements.end()) {
+            user_achievements[pchName]["earned"] = false;
+            user_achievements[pchName]["earned_time"] = static_cast<uint32>(0);
+            return true;
+        }
+    }
+    catch (...) {}
+
+    return false;
+}
+
+
+// Get the achievement status, and the time it was unlocked if unlocked.
+// If the return value is true, but the unlock time is zero, that means it was unlocked before Steam 
+// began tracking achievement unlock times (December 2009). Time is seconds since January 1, 1970.
+bool Steam_User_Stats::GetAchievementAndUnlockTime(const char* pchName, bool* pbAchieved, uint32* punUnlockTime)
+{
+    PRINT_DEBUG("GetAchievementAndUnlockTime\n");
+    if (pchName == nullptr) return false;
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+
+    try {
+        auto it = std::find_if(defined_achievements.begin(), defined_achievements.end(), [pchName](nlohmann::json& item) {
+            return static_cast<std::string const&>(item["name"]) == pchName;
+            });
+        auto ach = user_achievements.find(pchName);
+        if (it != defined_achievements.end() && ach != user_achievements.end()) {
+            if (pbAchieved != nullptr) *pbAchieved = (*ach)["earned"];
+            if (punUnlockTime != nullptr) *punUnlockTime = (*ach)["earned_time"];
+            return true;
+        }
+    }
+    catch (...) {}
+
+    if (pbAchieved != nullptr) *pbAchieved = false;
+    if (punUnlockTime != nullptr) *punUnlockTime = 0;
+    return true;
+}
+
+
+// Store the current data on the server, will get a callback when set
+// And one callback for every new achievement
+//
+// If the callback has a result of k_EResultInvalidParam, one or more stats 
+// uploaded has been rejected, either because they broke constraints
+// or were out of date. In this case the server sends back updated values.
+// The stats should be re-iterated to keep in sync.
+bool Steam_User_Stats::StoreStats()
+{
+    PRINT_DEBUG("StoreStats\n");
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+
+    save_achievements();
+
+    UserStatsStored_t data;
+    data.m_nGameID = settings->get_local_game_id().ToUint64();
+    data.m_eResult = k_EResultOK;
+    callbacks->addCBResult(data.k_iCallback, &data, sizeof(data));
+    return true;
+}
+
+
+// Achievement / GroupAchievement metadata
+
+// Gets the icon of the achievement, which is a handle to be used in ISteamUtils::GetImageRGBA(), or 0 if none set. 
+// A return value of 0 may indicate we are still fetching data, and you can wait for the UserAchievementIconFetched_t callback
+// which will notify you when the bits are ready. If the callback still returns zero, then there is no image set for the
+// specified achievement.
+int Steam_User_Stats::GetAchievementIcon(const char* pchName)
+{
+    PRINT_DEBUG("GetAchievementIcon\n");
+    if (pchName == nullptr) return 0;
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+
+    return 0;
+}
+
+
+// Get general attributes for an achievement. Accepts the following keys:
+// - "name" and "desc" for retrieving the localized achievement name and description (returned in UTF8)
+// - "hidden" for retrieving if an achievement is hidden (returns "0" when not hidden, "1" when hidden)
+const char* Steam_User_Stats::GetAchievementDisplayAttribute(const char* pchName, const char* pchKey)
+{
+    PRINT_DEBUG("GetAchievementDisplayAttribute %s %s\n", pchName, pchKey);
+    if (pchName == nullptr) return "";
+    if (pchKey == nullptr) return "";
+
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+
+    if (strcmp (pchKey, "name") == 0) {
+        try {
+            auto it = std::find_if(defined_achievements.begin(), defined_achievements.end(), [pchName](nlohmann::json& item) {
+                return static_cast<std::string const&>(item["name"]) == pchName;
+                });
+            if (it != defined_achievements.end()) {
+                return it.value()["displayName"].get_ptr<std::string*>()->c_str();
+            }
+        }
+        catch (...) {}
+    }
+
+    if (strcmp(pchKey, "desc") == 0) {
+        try {
+            auto it = std::find_if(defined_achievements.begin(), defined_achievements.end(), [pchName](nlohmann::json& item) {
+                return static_cast<std::string const&>(item["name"]) == pchName;
+                });
+            if (it != defined_achievements.end()) {
+                return it.value()["description"].get_ptr<std::string*>()->c_str();
+            }
+        }
+        catch (...) {}
+    }
+
+    if (strcmp(pchKey, "hidden") == 0) {
+        try {
+            auto it = std::find_if(defined_achievements.begin(), defined_achievements.end(), [pchName](nlohmann::json& item) {
+                return static_cast<std::string const&>(item["name"]) == pchName;
+                });
+            if (it != defined_achievements.end()) {
+                return it.value()["hidden"].get_ptr<std::string*>()->c_str();
+            }
+        }
+        catch (...) {}
+    }
+
+    return "";
+}
+
+
+// Achievement progress - triggers an AchievementProgress callback, that is all.
+// Calling this w/ N out of N progress will NOT set the achievement, the game must still do that.
+bool Steam_User_Stats::IndicateAchievementProgress(const char* pchName, uint32 nCurProgress, uint32 nMaxProgress)
+{
+    PRINT_DEBUG("IndicateAchievementProgress\n");
+    if (pchName == nullptr) return false;
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+
+    try {
+        auto it = std::find_if(defined_achievements.begin(), defined_achievements.end(), [pchName](nlohmann::json& item) {
+            return static_cast<std::string const&>(item["name"]) == pchName;
+        });
+        auto ach = user_achievements.find(pchName);
+        if (it != defined_achievements.end()) {
+            bool achieved = false;
+            if (ach != user_achievements.end()) {
+                bool achieved = ach->value("earned", false);
+            }
+
+            UserAchievementStored_t data = {};
+            data.m_nGameID = settings->get_local_game_id().ToUint64();
+            data.m_bGroupAchievement = false;
+            strncpy(data.m_rgchAchievementName, pchName, k_cchStatNameMax);
+
+            if (achieved) {
+                data.m_nCurProgress = 0;
+                data.m_nMaxProgress = 0;
+            }
+            else {
+                user_achievements[pchName]["progress"] = nCurProgress;
+                user_achievements[pchName]["max_progress"] = nMaxProgress;
+                data.m_nCurProgress = nCurProgress;
+                data.m_nMaxProgress = nMaxProgress;
+            }
+
+            save_achievements();
+            callback_results->addCallResult(data.k_iCallback, &data, sizeof(data));
+            return true;
+        }
+    }
+    catch (...) {}
+
+    return false;
+}
+
+
+// Used for iterating achievements. In general games should not need these functions because they should have a
+// list of existing achievements compiled into them
+uint32 Steam_User_Stats::GetNumAchievements()
+{
+    PRINT_DEBUG("GetNumAchievements\n");
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+    return defined_achievements.size();
+}
+
+// Get achievement name iAchievement in [0,GetNumAchievements)
+const char* Steam_User_Stats::GetAchievementName(uint32 iAchievement)
+{
+    PRINT_DEBUG("GetAchievementName\n");
+    try {
+        static std::string achievement_name;
+        achievement_name = defined_achievements[iAchievement]["name"].get<std::string>();
+        return achievement_name.c_str();
+    }
+    catch (...) {}
+    return "";
+}
+
+
+// Friends stats & achievements
+
+// downloads stats for the user
+// returns a UserStatsReceived_t received when completed
+// if the other user has no stats, UserStatsReceived_t.m_eResult will be set to k_EResultFail
+// these stats won't be auto-updated; you'll need to call RequestUserStats() again to refresh any data
+STEAM_CALL_RESULT(UserStatsReceived_t)
+SteamAPICall_t Steam_User_Stats::RequestUserStats(CSteamID steamIDUser)
+{
+    PRINT_DEBUG("Steam_User_Stats::RequestUserStats %llu\n", steamIDUser.ConvertToUint64());
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+
+    // Enable this to allow hot reload achievements status
+    //if (steamIDUser == settings->get_local_steam_id()) {
+    //    load_achievements();
+    //}
+
+
+    UserStatsReceived_t data;
+    data.m_nGameID = settings->get_local_game_id().ToUint64();
+    data.m_eResult = k_EResultOK;
+    data.m_steamIDUser = steamIDUser;
+    return callback_results->addCallResult(data.k_iCallback, &data, sizeof(data), 0.1);
+}
+
+
+// requests stat information for a user, usable after a successful call to RequestUserStats()
+bool Steam_User_Stats::GetUserStat(CSteamID steamIDUser, const char* pchName, int32* pData)
+{
+    PRINT_DEBUG("GetUserStat %s %llu\n", pchName, steamIDUser.ConvertToUint64());
+    if (pchName == nullptr) return false;
+
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+
+    if (steamIDUser == settings->get_local_steam_id()) {
+        GetStat(pchName, pData);
+    }
+    else {
+        *pData = 0;
+    }
+
+    return true;
+}
+
+bool Steam_User_Stats::GetUserStat(CSteamID steamIDUser, const char* pchName, float* pData)
+{
+    PRINT_DEBUG("GetUserStat %s %llu\n", pchName, steamIDUser.ConvertToUint64());
+    if (pchName == nullptr) return false;
+
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+
+    if (steamIDUser == settings->get_local_steam_id()) {
+        GetStat(pchName, pData);
+    }
+    else {
+        *pData = 0;
+    }
+
+    return true;
+}
+
+bool Steam_User_Stats::GetUserAchievement(CSteamID steamIDUser, const char* pchName, bool* pbAchieved)
+{
+    PRINT_DEBUG("GetUserAchievement %s\n", pchName);
+    if (pchName == nullptr) return false;
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+
+    if (steamIDUser == settings->get_local_steam_id()) {
+        return GetAchievement(pchName, pbAchieved);
+    }
+
+    return false;
+}
+
+// See notes for GetAchievementAndUnlockTime above
+bool Steam_User_Stats::GetUserAchievementAndUnlockTime(CSteamID steamIDUser, const char* pchName, bool* pbAchieved, uint32* punUnlockTime)
+{
+    PRINT_DEBUG("GetUserAchievementAndUnlockTime %s\n", pchName);
+    if (pchName == nullptr) return false;
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+
+    if (steamIDUser == settings->get_local_steam_id()) {
+        return GetAchievementAndUnlockTime(pchName, pbAchieved, punUnlockTime);
+    }
+    return false;
+}
+
+
+// Reset stats 
+bool Steam_User_Stats::ResetAllStats(bool bAchievementsToo)
+{
+    PRINT_DEBUG("ResetAllStats\n");
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+    //TODO
+    if (bAchievementsToo) {
+        std::for_each(user_achievements.begin(), user_achievements.end(), [](nlohmann::json& v) {
+            v["earned"] = false;
+            v["earned_time"] = 0;
+            });
+    }
+
+    return true;
+}
+
+
+// Leaderboard functions
+
+// asks the Steam back-end for a leaderboard by name, and will create it if it's not yet
+// This call is asynchronous, with the result returned in LeaderboardFindResult_t
+STEAM_CALL_RESULT(LeaderboardFindResult_t)
+SteamAPICall_t Steam_User_Stats::FindOrCreateLeaderboard(const char* pchLeaderboardName, ELeaderboardSortMethod eLeaderboardSortMethod, ELeaderboardDisplayType eLeaderboardDisplayType)
+{
+    PRINT_DEBUG("FindOrCreateLeaderboard %s\n", pchLeaderboardName);
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+
+    unsigned int leader = find_leaderboard(pchLeaderboardName);
+    if (!leader) {
+        struct Steam_Leaderboard leaderboard;
+        leaderboard.name = std::string(pchLeaderboardName);
+        leaderboard.sort_method = eLeaderboardSortMethod;
+        leaderboard.display_type = eLeaderboardDisplayType;
+        leaderboards.push_back(leaderboard);
+        leader = leaderboards.size();
+    }
+
+    LeaderboardFindResult_t data;
+    data.m_hSteamLeaderboard = leader;
+    data.m_bLeaderboardFound = 1;
+    return callback_results->addCallResult(data.k_iCallback, &data, sizeof(data));
+}
+
+
+// as above, but won't create the leaderboard if it's not found
+// This call is asynchronous, with the result returned in LeaderboardFindResult_t
+STEAM_CALL_RESULT(LeaderboardFindResult_t)
+SteamAPICall_t Steam_User_Stats::FindLeaderboard(const char* pchLeaderboardName)
+{
+    PRINT_DEBUG("FindLeaderboard %s\n", pchLeaderboardName);
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+
+    auto settings_Leaderboards = settings->getLeaderboards();
+    if (settings_Leaderboards.count(pchLeaderboardName)) {
+        auto config = settings_Leaderboards[pchLeaderboardName];
+        return FindOrCreateLeaderboard(pchLeaderboardName, config.sort_method, config.display_type);
+    }
+    else if (settings->createUnknownLeaderboards()) {
+        return FindOrCreateLeaderboard(pchLeaderboardName, k_ELeaderboardSortMethodDescending, k_ELeaderboardDisplayTypeNumeric);
+    }
+    else {
+        LeaderboardFindResult_t data;
+        data.m_hSteamLeaderboard = find_leaderboard(pchLeaderboardName);;
+        data.m_bLeaderboardFound = !!data.m_hSteamLeaderboard;
+        return callback_results->addCallResult(data.k_iCallback, &data, sizeof(data));
+    }
+}
+
+
+// returns the name of a leaderboard
+const char* Steam_User_Stats::GetLeaderboardName(SteamLeaderboard_t hSteamLeaderboard)
+{
+    PRINT_DEBUG("GetLeaderboardName\n");
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+
+    if (hSteamLeaderboard > leaderboards.size() || hSteamLeaderboard <= 0) return "";
+    return leaderboards[hSteamLeaderboard - 1].name.c_str();
+}
+
+
+// returns the total number of entries in a leaderboard, as of the last request
+int Steam_User_Stats::GetLeaderboardEntryCount(SteamLeaderboard_t hSteamLeaderboard)
+{
+    PRINT_DEBUG("GetLeaderboardEntryCount\n");
+    return 0;
+}
+
+
+// returns the sort method of the leaderboard
+ELeaderboardSortMethod Steam_User_Stats::GetLeaderboardSortMethod(SteamLeaderboard_t hSteamLeaderboard)
+{
+    PRINT_DEBUG("GetLeaderboardSortMethod\n");
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+    if (hSteamLeaderboard > leaderboards.size() || hSteamLeaderboard <= 0) return k_ELeaderboardSortMethodNone;
+    return leaderboards[hSteamLeaderboard - 1].sort_method;
+}
+
+
+// returns the display type of the leaderboard
+ELeaderboardDisplayType Steam_User_Stats::GetLeaderboardDisplayType(SteamLeaderboard_t hSteamLeaderboard)
+{
+    PRINT_DEBUG("GetLeaderboardDisplayType\n");
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+    if (hSteamLeaderboard > leaderboards.size() || hSteamLeaderboard <= 0) return k_ELeaderboardDisplayTypeNone;
+    return leaderboards[hSteamLeaderboard - 1].display_type;
+}
+
+
+// Asks the Steam back-end for a set of rows in the leaderboard.
+// This call is asynchronous, with the result returned in LeaderboardScoresDownloaded_t
+// LeaderboardScoresDownloaded_t will contain a handle to pull the results from GetDownloadedLeaderboardEntries() (below)
+// You can ask for more entries than exist, and it will return as many as do exist.
+// k_ELeaderboardDataRequestGlobal requests rows in the leaderboard from the full table, with nRangeStart & nRangeEnd in the range [1, TotalEntries]
+// k_ELeaderboardDataRequestGlobalAroundUser requests rows around the current user, nRangeStart being negate
+//   e.g. DownloadLeaderboardEntries( hLeaderboard, k_ELeaderboardDataRequestGlobalAroundUser, -3, 3 ) will return 7 rows, 3 before the user, 3 after
+// k_ELeaderboardDataRequestFriends requests all the rows for friends of the current user 
+STEAM_CALL_RESULT(LeaderboardScoresDownloaded_t)
+SteamAPICall_t Steam_User_Stats::DownloadLeaderboardEntries(SteamLeaderboard_t hSteamLeaderboard, ELeaderboardDataRequest eLeaderboardDataRequest, int nRangeStart, int nRangeEnd)
+{
+    PRINT_DEBUG("DownloadLeaderboardEntries %llu %i %i %i\n", hSteamLeaderboard, eLeaderboardDataRequest, nRangeStart, nRangeEnd);
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+    LeaderboardScoresDownloaded_t data;
+    data.m_hSteamLeaderboard = hSteamLeaderboard;
+    data.m_hSteamLeaderboardEntries = 123;
+    data.m_cEntryCount = 0;
+    return callback_results->addCallResult(data.k_iCallback, &data, sizeof(data));
+}
+
+// as above, but downloads leaderboard entries for an arbitrary set of users - ELeaderboardDataRequest is k_ELeaderboardDataRequestUsers
+// if a user doesn't have a leaderboard entry, they won't be included in the result
+// a max of 100 users can be downloaded at a time, with only one outstanding call at a time
+STEAM_METHOD_DESC(Downloads leaderboard entries for an arbitrary set of users - ELeaderboardDataRequest is k_ELeaderboardDataRequestUsers)
+STEAM_CALL_RESULT(LeaderboardScoresDownloaded_t)
+SteamAPICall_t Steam_User_Stats::DownloadLeaderboardEntriesForUsers(SteamLeaderboard_t hSteamLeaderboard,
+    STEAM_ARRAY_COUNT_D(cUsers, Array of users to retrieve) CSteamID * prgUsers, int cUsers)
+{
+    PRINT_DEBUG("DownloadLeaderboardEntriesForUsers %i %llu\n", cUsers, cUsers > 0 ? prgUsers[0].ConvertToUint64() : 0);
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+    LeaderboardScoresDownloaded_t data;
+    data.m_hSteamLeaderboard = hSteamLeaderboard;
+    data.m_hSteamLeaderboardEntries = 123;
+    data.m_cEntryCount = 0;
+    return callback_results->addCallResult(data.k_iCallback, &data, sizeof(data));
+}
+
+
+// Returns data about a single leaderboard entry
+// use a for loop from 0 to LeaderboardScoresDownloaded_t::m_cEntryCount to get all the downloaded entries
+// e.g.
+//		void OnLeaderboardScoresDownloaded( LeaderboardScoresDownloaded_t *pLeaderboardScoresDownloaded )
+//		{
+//			for ( int index = 0; index < pLeaderboardScoresDownloaded->m_cEntryCount; index++ )
+//			{
+//				LeaderboardEntry_t leaderboardEntry;
+//				int32 details[3];		// we know this is how many we've stored previously
+//				GetDownloadedLeaderboardEntry( pLeaderboardScoresDownloaded->m_hSteamLeaderboardEntries, index, &leaderboardEntry, details, 3 );
+//				assert( leaderboardEntry.m_cDetails == 3 );
+//				...
+//			}
+// once you've accessed all the entries, the data will be free'd, and the SteamLeaderboardEntries_t handle will become invalid
+bool Steam_User_Stats::GetDownloadedLeaderboardEntry(SteamLeaderboardEntries_t hSteamLeaderboardEntries, int index, LeaderboardEntry_t * pLeaderboardEntry, int32 * pDetails, int cDetailsMax)
+{
+    PRINT_DEBUG("GetDownloadedLeaderboardEntry\n");
+    return false;
+}
+
+
+// Uploads a user score to the Steam back-end.
+// This call is asynchronous, with the result returned in LeaderboardScoreUploaded_t
+// Details are extra game-defined information regarding how the user got that score
+// pScoreDetails points to an array of int32's, cScoreDetailsCount is the number of int32's in the list
+STEAM_CALL_RESULT(LeaderboardScoreUploaded_t)
+SteamAPICall_t Steam_User_Stats::UploadLeaderboardScore(SteamLeaderboard_t hSteamLeaderboard, ELeaderboardUploadScoreMethod eLeaderboardUploadScoreMethod, int32 nScore, const int32 * pScoreDetails, int cScoreDetailsCount)
+{
+    PRINT_DEBUG("UploadLeaderboardScore\n");
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+    LeaderboardScoreUploaded_t data;
+    data.m_bSuccess = 1; //needs to be success or DOA6 freezes when uploading score.
+    //data.m_bSuccess = 0;
+    data.m_hSteamLeaderboard = hSteamLeaderboard;
+    data.m_nScore = nScore;
+    //data.m_bScoreChanged = 1;
+    data.m_bScoreChanged = 0;
+    //data.m_nGlobalRankNew = 1;
+    data.m_nGlobalRankNew = 0;
+    data.m_nGlobalRankPrevious = 0;
+    return callback_results->addCallResult(data.k_iCallback, &data, sizeof(data));
+}
+
+SteamAPICall_t Steam_User_Stats::UploadLeaderboardScore(SteamLeaderboard_t hSteamLeaderboard, int32 nScore, int32 * pScoreDetails, int cScoreDetailsCount)
+{
+    PRINT_DEBUG("UploadLeaderboardScore old\n");
+    return UploadLeaderboardScore(hSteamLeaderboard, k_ELeaderboardUploadScoreMethodKeepBest, nScore, pScoreDetails, cScoreDetailsCount);
+}
+
+
+// Attaches a piece of user generated content the user's entry on a leaderboard.
+// hContent is a handle to a piece of user generated content that was shared using ISteamUserRemoteStorage::FileShare().
+// This call is asynchronous, with the result returned in LeaderboardUGCSet_t.
+STEAM_CALL_RESULT(LeaderboardUGCSet_t)
+SteamAPICall_t Steam_User_Stats::AttachLeaderboardUGC(SteamLeaderboard_t hSteamLeaderboard, UGCHandle_t hUGC)
+{
+    PRINT_DEBUG("AttachLeaderboardUGC\n");
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+    LeaderboardUGCSet_t data = {};
+    if (hSteamLeaderboard > leaderboards.size() || hSteamLeaderboard <= 0) {
+        data.m_eResult = k_EResultFail;
+    }
+    else {
+        data.m_eResult = k_EResultOK;
+    }
+
+    data.m_hSteamLeaderboard = hSteamLeaderboard;
+    return callback_results->addCallResult(data.k_iCallback, &data, sizeof(data));
+}
+
+
+// Retrieves the number of players currently playing your game (online + offline)
+// This call is asynchronous, with the result returned in NumberOfCurrentPlayers_t
+STEAM_CALL_RESULT(NumberOfCurrentPlayers_t)
+SteamAPICall_t Steam_User_Stats::GetNumberOfCurrentPlayers()
+{
+    PRINT_DEBUG("GetNumberOfCurrentPlayers\n");
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+    NumberOfCurrentPlayers_t data;
+    data.m_bSuccess = 1;
+    data.m_cPlayers = 69;
+    return callback_results->addCallResult(data.k_iCallback, &data, sizeof(data));
+}
+
+
+// Requests that Steam fetch data on the percentage of players who have received each achievement
+// for the game globally.
+// This call is asynchronous, with the result returned in GlobalAchievementPercentagesReady_t.
+STEAM_CALL_RESULT(GlobalAchievementPercentagesReady_t)
+SteamAPICall_t Steam_User_Stats::RequestGlobalAchievementPercentages()
+{
+    PRINT_DEBUG("RequestGlobalAchievementPercentages\n");
+}
+
+
+// Get the info on the most achieved achievement for the game, returns an iterator index you can use to fetch
+// the next most achieved afterwards.  Will return -1 if there is no data on achievement 
+// percentages (ie, you haven't called RequestGlobalAchievementPercentages and waited on the callback).
+int Steam_User_Stats::GetMostAchievedAchievementInfo(char* pchName, uint32 unNameBufLen, float* pflPercent, bool* pbAchieved)
+{
+    PRINT_DEBUG("GetMostAchievedAchievementInfo\n");
+}
+
+
+// Get the info on the next most achieved achievement for the game. Call this after GetMostAchievedAchievementInfo or another
+// GetNextMostAchievedAchievementInfo call passing the iterator from the previous call. Returns -1 after the last
+// achievement has been iterated.
+int Steam_User_Stats::GetNextMostAchievedAchievementInfo(int iIteratorPrevious, char* pchName, uint32 unNameBufLen, float* pflPercent, bool* pbAchieved)
+{
+    PRINT_DEBUG("GetNextMostAchievedAchievementInfo\n");
+}
+
+
+// Returns the percentage of users who have achieved the specified achievement.
+bool Steam_User_Stats::GetAchievementAchievedPercent(const char* pchName, float* pflPercent)
+{
+    PRINT_DEBUG("GetAchievementAchievedPercent\n");
+}
+
+
+// Requests global stats data, which is available for stats marked as "aggregated".
+// This call is asynchronous, with the results returned in GlobalStatsReceived_t.
+// nHistoryDays specifies how many days of day-by-day history to retrieve in addition
+// to the overall totals. The limit is 60.
+STEAM_CALL_RESULT(GlobalStatsReceived_t)
+SteamAPICall_t Steam_User_Stats::RequestGlobalStats(int nHistoryDays)
+{
+    PRINT_DEBUG("RequestGlobalStats %i\n", nHistoryDays);
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+    GlobalStatsReceived_t data;
+    data.m_nGameID = settings->get_local_game_id().ToUint64();
+    data.m_eResult = k_EResultOK;
+    return callback_results->addCallResult(data.k_iCallback, &data, sizeof(data));
+}
+
+
+// Gets the lifetime totals for an aggregated stat
+bool Steam_User_Stats::GetGlobalStat(const char* pchStatName, int64 * pData)
+{
+    PRINT_DEBUG("GetGlobalStat %s\n", pchStatName);
+    return false;
+}
+
+bool Steam_User_Stats::GetGlobalStat(const char* pchStatName, double* pData)
+{
+    PRINT_DEBUG("GetGlobalStat %s\n", pchStatName);
+    return false;
+}
+
+
+// Gets history for an aggregated stat. pData will be filled with daily values, starting with today.
+// So when called, pData[0] will be today, pData[1] will be yesterday, and pData[2] will be two days ago, 
+// etc. cubData is the size in bytes of the pubData buffer. Returns the number of 
+// elements actually set.
+int32 Steam_User_Stats::GetGlobalStatHistory(const char* pchStatName, STEAM_ARRAY_COUNT(cubData) int64 * pData, uint32 cubData)
+{
+    PRINT_DEBUG("GetGlobalStatHistory int64 %s\n", pchStatName);
+    return 0;
+}
+
+int32 Steam_User_Stats::GetGlobalStatHistory(const char* pchStatName, STEAM_ARRAY_COUNT(cubData) double* pData, uint32 cubData)
+{
+    PRINT_DEBUG("GetGlobalStatHistory double %s\n", pchStatName);
+    return 0;
+}

dll/steam_utils.h

@@ -17,6 +17,7 @@
 
 #include "base.h"
 #include "local_storage.h"
+#include "../overlay_experimental/steam_overlay.h"
 
 static std::chrono::time_point<std::chrono::steady_clock> app_initialized_time = std::chrono::steady_clock::now();
 
@@ -34,13 +35,14 @@ public ISteamUtils
 private:
     Settings *settings;
     class SteamCallResults *callback_results;
+    Steam_Overlay* overlay;
 
 public:
-Steam_Utils(Settings *settings, class SteamCallResults *callback_results)
+Steam_Utils(Settings *settings, class SteamCallResults *callback_results, Steam_Overlay *overlay):
-{
+    settings(settings),
-    this->settings = settings;
+    callback_results(callback_results),
-    this->callback_results = callback_results;
+    overlay(overlay)
-}
+{}
 
 // return the number of seconds since the user 
 uint32 GetSecondsSinceAppActive()
@@ -144,6 +146,7 @@ uint32 GetAppID()
 void SetOverlayNotificationPosition( ENotificationPosition eNotificationPosition )
 {
     PRINT_DEBUG("SetOverlayNotificationPosition\n");
+    overlay->SetNotificationPosition(eNotificationPosition);
 }
 
 
@@ -218,8 +221,7 @@ void SetWarningMessageHook( SteamAPIWarningMessageHook_t pFunction )
 bool IsOverlayEnabled()
 {
     PRINT_DEBUG("IsOverlayEnabled\n");
-    //TODO
+    return overlay->Ready();
-    return false;
 }
 
 
@@ -235,7 +237,7 @@ bool IsOverlayEnabled()
 bool BOverlayNeedsPresent()
 {
     PRINT_DEBUG("BOverlayNeedsPresent\n");
-    return false;
+    return overlay->NeedPresent();
 }
 
 
@@ -305,6 +307,7 @@ bool IsSteamRunningInVR()
 void SetOverlayNotificationInset( int nHorizontalInset, int nVerticalInset )
 {
     PRINT_DEBUG("SetOverlayNotificationInset\n");
+    overlay->SetNotificationInset(nHorizontalInset, nVerticalInset);
 }
 
 

download_glew.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+
+rm -rf glew*
+
+URL="https://downloads.sourceforge.net/project/glew/glew/2.1.0/glew-2.1.0-win32.zip?r=https%3A%2F%2Fsourceforge.net%2Fprojects%2Fglew%2Ffiles%2Fglew%2F2.1.0%2Fglew-2.1.0-win32.zip%2Fdownload&ts=1565791827"
+
+wget "$URL" -O glew.zip
+unzip glew.zip
+rm glew.zip
+mv glew-* glew
+# Fix libraries name
+sed -i "s/LIBCMT/libcmt/;s/OLDNAMES/oldnames/" glew/lib/Release/*/glew32s.lib

overlay_experimental/Base_Hook.cpp

@@ -0,0 +1,88 @@
+#include "Base_Hook.h"
+#include "Hook_Manager.h"
+
+#include <algorithm>
+
+#ifndef NO_OVERLAY
+#ifdef STEAM_WIN32
+
+#include "../detours/detours.h"
+
+Base_Hook::Base_Hook():
+    _library(nullptr)
+{}
+
+Base_Hook::~Base_Hook()
+{
+    UnhookAll();
+}
+
+const char* Base_Hook::get_lib_name() const
+{
+    return "<no_name>";
+}
+
+void Base_Hook::BeginHook()
+{
+    DetourTransactionBegin();
+    DetourUpdateThread(GetCurrentThread());
+}
+
+void Base_Hook::EndHook()
+{
+    DetourTransactionCommit();
+}
+
+void Base_Hook::HookFunc(std::pair<void**, void*> hook)
+{
+    if( DetourAttach(hook.first, hook.second) == 0 )
+        _hooked_funcs.emplace_back(hook);
+}
+
+void Base_Hook::UnhookAll()
+{
+    if (_hooked_funcs.size())
+    {
+        BeginHook();
+        std::for_each(_hooked_funcs.begin(), _hooked_funcs.end(), [](std::pair<void**, void*>& hook) {
+            DetourDetach(hook.first, hook.second);
+            });
+        EndHook();
+        _hooked_funcs.clear();
+    }
+}
+
+#else
+
+Base_Hook::Base_Hook():
+    _library(nullptr)
+{}
+
+Base_Hook::~Base_Hook()
+{
+}
+
+const char* Base_Hook::get_lib_name() const
+{
+    return "<no_name>";
+}
+
+void Base_Hook::BeginHook()
+{
+}
+
+void Base_Hook::EndHook()
+{
+}
+
+void Base_Hook::HookFunc(std::pair<void**, void*> hook)
+{
+}
+
+void Base_Hook::UnhookAll()
+{
+}
+
+#endif
+
+#endif//NO_OVERLAY

overlay_experimental/Base_Hook.h

@@ -0,0 +1,50 @@
+#ifndef __INCLUDED_BASE_HOOK_H__
+#define __INCLUDED_BASE_HOOK_H__
+
+#ifndef NO_OVERLAY
+
+#include <vector>
+#include <utility>
+
+#include "../dll/base.h"
+
+class Base_Hook
+{
+protected:
+    std::vector<std::pair<void**, void*>> _hooked_funcs;
+
+    void* _library;
+
+    Base_Hook(const Base_Hook&) = delete;
+    Base_Hook(Base_Hook&&) = delete;
+    Base_Hook& operator =(const Base_Hook&) = delete;
+    Base_Hook& operator =(Base_Hook&&) = delete;
+
+public:
+    Base_Hook();
+    virtual ~Base_Hook();
+
+    void BeginHook();
+    void EndHook();
+    void UnhookAll();
+
+    virtual const char* get_lib_name() const;
+    void HookFunc(std::pair<void**, void*> hook);
+
+    template<typename T>
+    void HookFuncs(std::pair<T*, T> funcs)
+    {
+        HookFunc(funcs);
+    }
+
+    template<typename T, typename ...Args>
+    void HookFuncs(std::pair<T*, T> funcs, Args... args)
+    {
+        HookFunc(funcs);
+        HookFuncs(args...);
+    }
+};
+
+#endif//NO_OVERLAY
+
+#endif//__INCLUDED_BASE_HOOK_H__

overlay_experimental/Hook_Manager.cpp

@@ -0,0 +1,36 @@
+#include "../dll/dll.h"
+#include "Hook_Manager.h"
+
+#ifndef NO_OVERLAY
+
+Hook_Manager::Hook_Manager()
+{}
+
+Hook_Manager::~Hook_Manager()
+{
+    for (auto& i : _hooks)
+        delete i;
+}
+
+Hook_Manager& Hook_Manager::Inst()
+{
+    static Hook_Manager hook;
+    return hook;
+}
+
+void Hook_Manager::AddHook(Base_Hook* hook)
+{
+    _hooks.insert(hook);
+}
+
+void Hook_Manager::RemoveHook(Base_Hook* hook)
+{
+    auto it = _hooks.find(hook);
+    if (it != _hooks.end())
+    {
+        delete hook;
+        _hooks.erase(it);
+    }
+}
+
+#endif//NO_OVERLAY

overlay_experimental/Hook_Manager.h

@@ -0,0 +1,29 @@
+#ifndef __INCLUDED_HOOK_BASE_H__
+#define __INCLUDED_HOOK_BASE_H__
+
+#include "Base_Hook.h"
+
+#ifndef NO_OVERLAY
+
+#include <set>
+
+class Hook_Manager
+{
+    friend class Base_Hook;
+
+protected:
+    std::set<Base_Hook*> _hooks; 
+
+    Hook_Manager();
+    virtual ~Hook_Manager();
+
+public:
+    static Hook_Manager& Inst();
+
+    void AddHook(Base_Hook* hook);
+    void RemoveHook(Base_Hook* hook);
+};
+
+#endif//NO_OVERLAY
+
+#endif//__INCLUDED_HOOK_BASE_H__

overlay_experimental/Renderer_Detector.cpp

@@ -0,0 +1,832 @@
+#include "Renderer_Detector.h"
+#include "Hook_Manager.h"
+
+#include <algorithm>
+
+constexpr int max_hook_retries = 500;
+
+#ifdef STEAM_WIN32
+#include "windows/DX12_Hook.h"
+#include "windows/DX11_Hook.h"
+#include "windows/DX10_Hook.h"
+#include "windows/DX9_Hook.h"
+#include "windows/OpenGL_Hook.h"
+#include "windows/Windows_Hook.h"
+
+static decltype(&IDXGISwapChain::Present) _IDXGISwapChain_Present = nullptr;
+static decltype(&IDirect3DDevice9::Present) _IDirect3DDevice9_Present = nullptr;
+static decltype(&IDirect3DDevice9Ex::PresentEx) _IDirect3DDevice9Ex_PresentEx = nullptr;
+static decltype(wglMakeCurrent)* _wglMakeCurrent = nullptr;
+
+static constexpr auto windowClassName = "___overlay_window_class___";
+
+void Renderer_Detector::create_hwnd()
+{
+    if (dummy_hWnd == nullptr)
+    {
+        HINSTANCE hInst = GetModuleHandle(nullptr);
+        if (atom == 0)
+        {
+            // Register a window class for creating our render window with.
+            WNDCLASSEX windowClass = {};
+
+            windowClass.cbSize = sizeof(WNDCLASSEX);
+            windowClass.style = CS_HREDRAW | CS_VREDRAW;
+            windowClass.lpfnWndProc = DefWindowProc;
+            windowClass.cbClsExtra = 0;
+            windowClass.cbWndExtra = 0;
+            windowClass.hInstance = hInst;
+            windowClass.hIcon = NULL;
+            windowClass.hCursor = ::LoadCursor(NULL, IDC_ARROW);
+            windowClass.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
+            windowClass.lpszMenuName = NULL;
+            windowClass.lpszClassName = windowClassName;
+            windowClass.hIconSm = NULL;
+
+            atom = ::RegisterClassEx(&windowClass);
+        }
+
+        if (atom > 0)
+        {
+            dummy_hWnd = ::CreateWindowEx(
+                NULL,
+                windowClassName,
+                "",
+                WS_OVERLAPPEDWINDOW,
+                0,
+                0,
+                1,
+                1,
+                NULL,
+                NULL,
+                hInst,
+                nullptr
+            );
+
+            assert(dummy_hWnd && "Failed to create window");
+        }
+    }
+
+}
+
+void Renderer_Detector::destroy_hwnd()
+{
+    if (dummy_hWnd != nullptr)
+    {
+        DestroyWindow(dummy_hWnd);
+        UnregisterClass(windowClassName, GetModuleHandle(nullptr));
+    }
+}
+
+HRESULT STDMETHODCALLTYPE Renderer_Detector::MyIDXGISwapChain_Present(IDXGISwapChain* _this, UINT SyncInterval, UINT Flags)
+{
+    Renderer_Detector& inst = Renderer_Detector::Inst();
+    Hook_Manager& hm = Hook_Manager::Inst();
+
+    auto res = (_this->*_IDXGISwapChain_Present)(SyncInterval, Flags);
+    if (!inst.stop_retry())
+    {
+        IUnknown* pDevice = nullptr;
+        if (inst._dx12_hooked)
+        {
+            _this->GetDevice(IID_PPV_ARGS(reinterpret_cast<ID3D12Device**>(&pDevice)));
+        }
+        if (pDevice)
+        {
+            DX12_Hook::Inst()->start_hook();
+        }
+        else
+        {
+            if (inst._dx11_hooked)
+            {
+                _this->GetDevice(IID_PPV_ARGS(reinterpret_cast<ID3D11Device**>(&pDevice)));
+            }
+            if (pDevice)
+            {
+                DX11_Hook::Inst()->start_hook();
+            }
+            else
+            {
+                if (inst._dx10_hooked)
+                {
+                    _this->GetDevice(IID_PPV_ARGS(reinterpret_cast<ID3D10Device**>(&pDevice)));
+                }
+                if (pDevice)
+                {
+                    DX10_Hook::Inst()->start_hook();
+                }
+            }
+        }
+        if (pDevice) pDevice->Release();
+    }
+
+    return res;
+}
+
+HRESULT STDMETHODCALLTYPE Renderer_Detector::MyPresent(IDirect3DDevice9* _this, CONST RECT* pSourceRect, CONST RECT* pDestRect, HWND hDestWindowOverride, CONST RGNDATA* pDirtyRegion)
+{
+    Renderer_Detector& inst = Renderer_Detector::Inst();
+    Hook_Manager& hm = Hook_Manager::Inst();
+    auto res = (_this->*_IDirect3DDevice9_Present)(pSourceRect, pDestRect, hDestWindowOverride, pDirtyRegion);
+    if (!inst.stop_retry())
+    {
+        DX9_Hook::Inst()->start_hook();
+    }
+    return res;
+}
+
+HRESULT STDMETHODCALLTYPE Renderer_Detector::MyPresentEx(IDirect3DDevice9Ex* _this, CONST RECT* pSourceRect, CONST RECT* pDestRect, HWND hDestWindowOverride, CONST RGNDATA* pDirtyRegion, DWORD dwFlags)
+{
+    Renderer_Detector& inst = Renderer_Detector::Inst();
+    Hook_Manager& hm = Hook_Manager::Inst();
+    auto res = (_this->*_IDirect3DDevice9Ex_PresentEx)(pSourceRect, pDestRect, hDestWindowOverride, pDirtyRegion, dwFlags);
+    if (!inst.stop_retry())
+    {
+        DX9_Hook::Inst()->start_hook();
+    }
+    return res;
+}
+
+BOOL WINAPI Renderer_Detector::MywglMakeCurrent(HDC hDC, HGLRC hGLRC)
+{
+    Renderer_Detector& inst = Renderer_Detector::Inst();
+    Hook_Manager& hm = Hook_Manager::Inst();
+    auto res = _wglMakeCurrent(hDC, hGLRC);
+    if (!inst.stop_retry())
+    {
+        OpenGL_Hook::Inst()->start_hook();
+    }
+    return res;
+}
+
+void Renderer_Detector::HookDXGIPresent(IDXGISwapChain* pSwapChain)
+{
+    if (!_dxgi_hooked)
+    {
+        _dxgi_hooked = true;
+        (void*&)_IDXGISwapChain_Present = (*reinterpret_cast<void***>(pSwapChain))[(int)IDXGISwapChainVTable::Present];
+
+        rendererdetect_hook->BeginHook();
+
+        rendererdetect_hook->HookFuncs(
+            std::pair<void**, void*>((PVOID*)& _IDXGISwapChain_Present, &Renderer_Detector::MyIDXGISwapChain_Present)
+        );
+
+        rendererdetect_hook->EndHook();
+    }
+}
+
+void Renderer_Detector::HookDX9Present(IDirect3DDevice9* pDevice, bool ex)
+{
+    (void*&)_IDirect3DDevice9_Present = (*reinterpret_cast<void***>(pDevice))[(int)IDirect3DDevice9VTable::Present];
+    if (ex)
+        (void*&)_IDirect3DDevice9Ex_PresentEx = (*reinterpret_cast<void***>(pDevice))[(int)IDirect3DDevice9VTable::PresentEx];
+
+    rendererdetect_hook->BeginHook();
+
+    rendererdetect_hook->HookFuncs(
+        std::pair<void**, void*>((PVOID*)& _IDirect3DDevice9_Present, &Renderer_Detector::MyPresent)
+    );
+    if (ex)
+    {
+        rendererdetect_hook->HookFuncs(
+            std::pair<void**, void*>((PVOID*)& _IDirect3DDevice9Ex_PresentEx, &Renderer_Detector::MyPresentEx)
+        );
+    }
+
+    rendererdetect_hook->EndHook();
+}
+
+void Renderer_Detector::HookwglMakeCurrent(decltype(wglMakeCurrent)* wglMakeCurrent)
+{
+    _wglMakeCurrent = wglMakeCurrent;
+
+    rendererdetect_hook->BeginHook();
+
+    rendererdetect_hook->HookFuncs(
+        std::pair<void**, void*>((PVOID*)& _wglMakeCurrent, &Renderer_Detector::MywglMakeCurrent)
+    );
+
+    rendererdetect_hook->EndHook();
+}
+
+void Renderer_Detector::hook_dx9()
+{
+    if (!_dx9_hooked && !_renderer_found)
+    {
+        create_hwnd();
+        if (dummy_hWnd == nullptr)
+            return;
+
+        IDirect3D9Ex* pD3D = nullptr;
+        IUnknown* pDevice = nullptr;
+        HMODULE library = GetModuleHandle(DX9_Hook::DLL_NAME);
+        decltype(Direct3DCreate9Ex)* Direct3DCreate9Ex = nullptr;
+        if (library != nullptr)
+        {
+            Direct3DCreate9Ex = (decltype(Direct3DCreate9Ex))GetProcAddress(library, "Direct3DCreate9Ex");
+            D3DPRESENT_PARAMETERS params = {};
+            params.BackBufferWidth = 1;
+            params.BackBufferHeight = 1;
+            params.hDeviceWindow = dummy_hWnd;
+            params.BackBufferCount = 1;
+            params.Windowed = TRUE;
+            params.SwapEffect = D3DSWAPEFFECT_DISCARD;
+
+            if (Direct3DCreate9Ex != nullptr)
+            {
+                Direct3DCreate9Ex(D3D_SDK_VERSION, &pD3D);
+                pD3D->CreateDeviceEx(D3DADAPTER_DEFAULT, D3DDEVTYPE_NULLREF, NULL, D3DCREATE_HARDWARE_VERTEXPROCESSING, &params, NULL, reinterpret_cast<IDirect3DDevice9Ex * *>(&pDevice));
+            }
+            else
+            {
+                decltype(Direct3DCreate9)* Direct3DCreate9 = (decltype(Direct3DCreate9))GetProcAddress(library, "Direct3DCreate9");
+                if (Direct3DCreate9 != nullptr)
+                {
+                    pD3D = reinterpret_cast<IDirect3D9Ex*>(Direct3DCreate9(D3D_SDK_VERSION));
+                    pD3D->CreateDevice(D3DADAPTER_DEFAULT, D3DDEVTYPE_NULLREF, NULL, D3DCREATE_HARDWARE_VERTEXPROCESSING, &params, reinterpret_cast<IDirect3DDevice9 * *>(&pDevice));
+                }
+            }
+        }
+
+        if (pDevice != nullptr)
+        {
+            PRINT_DEBUG("Hooked D3D9::Present to detect DX Version\n");
+
+            _dx9_hooked = true;
+            auto h = DX9_Hook::Inst();
+            h->loadFunctions(reinterpret_cast<IDirect3DDevice9*>(pDevice), Direct3DCreate9Ex != nullptr);
+            Hook_Manager::Inst().AddHook(h);
+            HookDX9Present(reinterpret_cast<IDirect3DDevice9*>(pDevice), Direct3DCreate9Ex != nullptr);
+        }
+        else
+        {
+            PRINT_DEBUG("Failed to hook D3D9::Present to detect DX Version\n");
+        }
+
+        if (pDevice) pDevice->Release();
+        if (pD3D) pD3D->Release();
+    }
+}
+
+void Renderer_Detector::hook_dx10()
+{
+    if (!_dxgi_hooked && !_renderer_found)
+    {
+        create_hwnd();
+        if (dummy_hWnd == nullptr)
+            return;
+
+        IDXGISwapChain* pSwapChain = nullptr;
+        ID3D10Device* pDevice = nullptr;
+        HMODULE library = GetModuleHandle(DX10_Hook::DLL_NAME);
+        if (library != nullptr)
+        {
+            decltype(D3D10CreateDeviceAndSwapChain)* D3D10CreateDeviceAndSwapChain =
+                (decltype(D3D10CreateDeviceAndSwapChain))GetProcAddress(library, "D3D10CreateDeviceAndSwapChain");
+            if (D3D10CreateDeviceAndSwapChain != nullptr)
+            {
+                DXGI_SWAP_CHAIN_DESC SwapChainDesc = {};
+
+                SwapChainDesc.BufferCount = 1;
+                SwapChainDesc.BufferDesc.Width = 1;
+                SwapChainDesc.BufferDesc.Height = 1;
+                SwapChainDesc.BufferDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
+                SwapChainDesc.BufferDesc.RefreshRate.Numerator = 0;
+                SwapChainDesc.BufferDesc.RefreshRate.Denominator = 0;
+                SwapChainDesc.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
+                SwapChainDesc.OutputWindow = dummy_hWnd;
+                SwapChainDesc.SampleDesc.Count = 1;
+                SwapChainDesc.SampleDesc.Quality = 0;
+                SwapChainDesc.Windowed = TRUE;
+
+                D3D10CreateDeviceAndSwapChain(NULL, D3D10_DRIVER_TYPE_NULL, NULL, 0, D3D10_SDK_VERSION, &SwapChainDesc, &pSwapChain, &pDevice);
+            }
+        }
+        if (pSwapChain != nullptr)
+        {
+            PRINT_DEBUG("Hooked IDXGISwapChain::Present to detect DX Version\n");
+
+            _dx10_hooked = true;
+            auto h = DX10_Hook::Inst();
+            h->loadFunctions(pSwapChain);
+            Hook_Manager::Inst().AddHook(h);
+            HookDXGIPresent(pSwapChain);
+        }
+        else
+        {
+            PRINT_DEBUG("Failed to Hook IDXGISwapChain::Present to detect DX Version\n");
+        }
+        if (pDevice)pDevice->Release();
+        if (pSwapChain)pSwapChain->Release();
+    }
+}
+
+void Renderer_Detector::hook_dx11()
+{
+    if (!_dxgi_hooked && !_renderer_found)
+    {
+        create_hwnd();
+        if (dummy_hWnd == nullptr)
+            return;
+
+        IDXGISwapChain* pSwapChain = nullptr;
+        ID3D11Device* pDevice = nullptr;
+        HMODULE library = GetModuleHandle(DX11_Hook::DLL_NAME);
+        if (library != nullptr)
+        {
+            decltype(D3D11CreateDeviceAndSwapChain)* D3D11CreateDeviceAndSwapChain =
+                (decltype(D3D11CreateDeviceAndSwapChain))GetProcAddress(library, "D3D11CreateDeviceAndSwapChain");
+            if (D3D11CreateDeviceAndSwapChain != nullptr)
+            {
+                DXGI_SWAP_CHAIN_DESC SwapChainDesc = {};
+
+                SwapChainDesc.BufferCount = 1;
+                SwapChainDesc.BufferDesc.Width = 1;
+                SwapChainDesc.BufferDesc.Height = 1;
+                SwapChainDesc.BufferDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
+                SwapChainDesc.BufferDesc.RefreshRate.Numerator = 0;
+                SwapChainDesc.BufferDesc.RefreshRate.Denominator = 0;
+                SwapChainDesc.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
+                SwapChainDesc.OutputWindow = dummy_hWnd;
+                SwapChainDesc.SampleDesc.Count = 1;
+                SwapChainDesc.SampleDesc.Quality = 0;
+                SwapChainDesc.Windowed = TRUE;
+
+                D3D11CreateDeviceAndSwapChain(NULL, D3D_DRIVER_TYPE_NULL, NULL, 0, NULL, NULL, D3D11_SDK_VERSION, &SwapChainDesc, &pSwapChain, &pDevice, NULL, NULL);
+            }
+        }
+        if (pSwapChain != nullptr)
+        {
+            PRINT_DEBUG("Hooked IDXGISwapChain::Present to detect DX Version\n");
+
+            _dx11_hooked = true;
+            auto h = DX11_Hook::Inst();
+            h->loadFunctions(pSwapChain);
+            Hook_Manager::Inst().AddHook(h);
+            HookDXGIPresent(pSwapChain);
+        }
+        else
+        {
+            PRINT_DEBUG("Failed to Hook IDXGISwapChain::Present to detect DX Version\n");
+        }
+
+        if (pDevice) pDevice->Release();
+        if (pSwapChain) pSwapChain->Release();
+    }
+}
+
+void Renderer_Detector::hook_dx12()
+{
+    if (!_dxgi_hooked && !_renderer_found)
+    {
+        create_hwnd();
+        if (dummy_hWnd == nullptr)
+            return;
+
+        IDXGIFactory4* pDXGIFactory = nullptr;
+        IDXGISwapChain1* pSwapChain = nullptr;
+        ID3D12CommandQueue* pCommandQueue = nullptr;
+        ID3D12Device* pDevice = nullptr;
+        ID3D12CommandAllocator* pCommandAllocator = nullptr;
+        ID3D12GraphicsCommandList* pCommandList = nullptr;
+
+        HMODULE library = GetModuleHandle(DX12_Hook::DLL_NAME);
+        if (library != nullptr)
+        {
+            decltype(D3D12CreateDevice)* D3D12CreateDevice =
+                (decltype(D3D12CreateDevice))GetProcAddress(library, "D3D12CreateDevice");
+
+            if (D3D12CreateDevice != nullptr)
+            {
+                D3D12CreateDevice(NULL, D3D_FEATURE_LEVEL_11_0, IID_PPV_ARGS(&pDevice));
+
+                if (pDevice != nullptr)
+                {
+                    DXGI_SWAP_CHAIN_DESC1 SwapChainDesc = {};
+                    SwapChainDesc.BufferCount = 2;
+                    SwapChainDesc.Width = 1;
+                    SwapChainDesc.Height = 1;
+                    SwapChainDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
+                    SwapChainDesc.Stereo = FALSE;
+                    SwapChainDesc.SampleDesc = { 1, 0 };
+                    SwapChainDesc.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
+                    SwapChainDesc.Scaling = DXGI_SCALING_NONE;
+                    SwapChainDesc.SwapEffect = DXGI_SWAP_EFFECT_FLIP_DISCARD;
+                    SwapChainDesc.AlphaMode = DXGI_ALPHA_MODE_UNSPECIFIED;
+
+                    D3D12_COMMAND_QUEUE_DESC queueDesc = {};
+                    queueDesc.Type = D3D12_COMMAND_LIST_TYPE_DIRECT;
+                    queueDesc.Flags = D3D12_COMMAND_QUEUE_FLAG_NONE;
+                    pDevice->CreateCommandQueue(&queueDesc, IID_PPV_ARGS(&pCommandQueue));
+
+                    if (pCommandQueue != nullptr)
+                    {
+                        HMODULE dxgi = GetModuleHandle("dxgi.dll");
+                        if (dxgi != nullptr)
+                        {
+                            decltype(CreateDXGIFactory1)* CreateDXGIFactory1 = (decltype(CreateDXGIFactory1))GetProcAddress(dxgi, "CreateDXGIFactory1");
+                            if (CreateDXGIFactory1 != nullptr)
+                            {
+                                CreateDXGIFactory1(IID_PPV_ARGS(&pDXGIFactory));
+                                if (pDXGIFactory != nullptr)
+                                {
+                                    pDXGIFactory->CreateSwapChainForHwnd(pCommandQueue, dummy_hWnd, &SwapChainDesc, NULL, NULL, &pSwapChain);
+
+                                    pDevice->CreateCommandAllocator(D3D12_COMMAND_LIST_TYPE_DIRECT, IID_PPV_ARGS(&pCommandAllocator));
+                                    if (pCommandAllocator != nullptr)
+                                    {
+                                        pDevice->CreateCommandList(0, D3D12_COMMAND_LIST_TYPE_DIRECT, pCommandAllocator, NULL, IID_PPV_ARGS(&pCommandList));
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }//if (pDevice != nullptr)
+            }//if (D3D12CreateDevice != nullptr)
+        }//if (library != nullptr)
+        if (pCommandQueue != nullptr && pSwapChain != nullptr)
+        {
+            PRINT_DEBUG("Hooked IDXGISwapChain::Present to detect DX Version\n");
+
+            _dx12_hooked = true;
+            auto h = DX12_Hook::Inst();
+            h->loadFunctions(pCommandQueue, pSwapChain);
+            Hook_Manager::Inst().AddHook(h);
+            HookDXGIPresent(pSwapChain);
+        }
+        else
+        {
+            PRINT_DEBUG("Failed to Hook IDXGISwapChain::Present to detect DX Version\n");
+        }
+
+        if (pCommandList) pCommandList->Release();
+        if (pCommandAllocator) pCommandAllocator->Release();
+        if (pSwapChain) pSwapChain->Release();
+        if (pDXGIFactory) pDXGIFactory->Release();
+        if (pCommandQueue) pCommandQueue->Release();
+        if (pDevice) pDevice->Release();
+    }
+}
+
+void Renderer_Detector::hook_opengl()
+{
+    if (!_ogl_hooked && !_renderer_found)
+    {
+        HMODULE library = GetModuleHandle(OpenGL_Hook::DLL_NAME);
+        decltype(wglMakeCurrent)* wglMakeCurrent = nullptr;
+        OpenGL_Hook::wglSwapBuffers_t wglSwapBuffers = nullptr;
+        if (library != nullptr)
+        {
+            wglMakeCurrent = (decltype(wglMakeCurrent))GetProcAddress(library, "wglMakeCurrent");
+            wglSwapBuffers = (decltype(wglSwapBuffers))GetProcAddress(library, "wglSwapBuffers");
+        }
+        if (wglMakeCurrent != nullptr && wglSwapBuffers != nullptr)
+        {
+            PRINT_DEBUG("Hooked wglMakeCurrent to detect OpenGL\n");
+
+            _ogl_hooked = true;
+            auto h = OpenGL_Hook::Inst();
+            h->loadFunctions(wglSwapBuffers);
+            Hook_Manager::Inst().AddHook(h);
+            HookwglMakeCurrent(wglMakeCurrent);
+        }
+        else
+        {
+            PRINT_DEBUG("Failed to Hook wglMakeCurrent to detect OpenGL\n");
+        }
+    }
+}
+
+void Renderer_Detector::create_hook(const char* libname)
+{
+    if (!_stricmp(libname, DX9_Hook::DLL_NAME))
+        hook_dx9();
+    else if (!_stricmp(libname, DX10_Hook::DLL_NAME))
+        hook_dx10();
+    else if (!_stricmp(libname, DX11_Hook::DLL_NAME))
+        hook_dx11();
+    else if (!_stricmp(libname, DX12_Hook::DLL_NAME))
+        hook_dx12();
+    else if (!_stricmp(libname, OpenGL_Hook::DLL_NAME))
+        hook_opengl();
+}
+
+void Renderer_Detector::find_renderer_proc(Renderer_Detector* _this)
+{
+    _this->rendererdetect_hook = new Base_Hook();
+    Hook_Manager& hm = Hook_Manager::Inst();
+    hm.AddHook(_this->rendererdetect_hook);
+
+    std::vector<std::string> const libraries = {
+        OpenGL_Hook::DLL_NAME,
+        DX12_Hook::DLL_NAME,
+        DX11_Hook::DLL_NAME,
+        DX10_Hook::DLL_NAME,
+        DX9_Hook::DLL_NAME
+    };
+
+    while (!_this->_renderer_found && !_this->stop_retry())
+    {
+        std::vector<std::string>::const_iterator it = libraries.begin();
+        while (it != libraries.end())
+        {
+            {
+                std::lock_guard<std::mutex> lock(_this->_found_mutex);
+                if (_this->_renderer_found)
+                    break;
+
+                it = std::find_if(it, libraries.end(), [](std::string const& name) {
+                    auto x = GetModuleHandle(name.c_str());
+                    if (x != NULL)
+                        return true;
+                    return false;
+                    });
+
+                if (it == libraries.end())
+                    break;
+
+                _this->create_hook(it->c_str());
+                ++it;
+            }
+        }
+
+        std::this_thread::sleep_for(std::chrono::milliseconds(500));
+    }
+
+    _this->destroy_hwnd();
+
+    if (_this->game_renderer == nullptr) // Couldn't hook renderer
+    {
+        hm.RemoveHook(Windows_Hook::Inst());
+    }
+    else
+    {
+        hm.AddHook(Windows_Hook::Inst());
+    }
+    if (_this->_ogl_hooked)
+    {
+        auto h = OpenGL_Hook::Inst();
+        if (h != _this->game_renderer)
+        {
+            _this->_ogl_hooked = false;
+            hm.RemoveHook(h);
+        }
+    }
+    if (_this->_dx9_hooked)
+    {
+        auto h = DX9_Hook::Inst();
+        if (h != _this->game_renderer)
+        {
+            _this->_dx9_hooked = false;
+            hm.RemoveHook(h);
+        }
+    }
+    if (_this->_dx10_hooked)
+    {
+        auto h = DX10_Hook::Inst();
+        if (h != _this->game_renderer)
+        {
+            _this->_dx10_hooked = false;
+            hm.RemoveHook(h);
+        }
+    }
+    if (_this->_dx11_hooked)
+    {
+        auto h = DX11_Hook::Inst();
+        if (h != _this->game_renderer)
+        {
+            _this->_dx11_hooked = false;
+            hm.RemoveHook(h);
+        }
+    }
+    if (_this->_dx12_hooked)
+    {
+        auto h = DX12_Hook::Inst();
+        if (h != _this->game_renderer)
+        {
+            _this->_dx12_hooked = false;
+            hm.RemoveHook(h);
+        }
+    }
+
+    delete _this->_hook_thread;
+    _this->_hook_thread = nullptr;
+}
+
+Renderer_Detector::Renderer_Detector():
+    _hook_thread(nullptr),
+    _hook_retries(0),
+    _renderer_found(false),
+    _dx9_hooked(false),
+    _dx10_hooked(false),
+    _dx11_hooked(false),
+    _dx12_hooked(false),
+    _dxgi_hooked(false),
+    _ogl_hooked(false),
+    rendererdetect_hook(nullptr),
+    game_renderer(nullptr),
+    atom(0),
+    dummy_hWnd(nullptr)
+{}
+
+#else// defined(__LINUX__)//!STEAM_WIN32
+#include "linux/X11_Hook.h"
+
+#include <dlfcn.h>
+
+extern "C" void *_dl_sym(void *, const char *, void *);
+
+static decltype(glXGetProcAddress)* real_glXGetProcAddress = nullptr;
+static decltype(glXGetProcAddressARB)* real_glXGetProcAddressARB = nullptr;
+
+static decltype(dlsym)* real_dlsym = nullptr;
+
+extern "C" int XEventsQueued(Display *display, int mode)
+{
+    auto h = X11_Hook::Inst();
+    if( h->_XEventsQueued == nullptr )
+        h->_XEventsQueued = reinterpret_cast<decltype(XEventsQueued)*>(real_dlsym(RTLD_NEXT, "XEventsQueued"));
+
+    return X11_Hook::MyXEventsQueued(display, mode);
+}
+
+//extern "C" int XPeekEvent(Display *display, XEvent *event)
+//{
+//    auto h = X11_Hook::Inst();
+//    if( h->_XPeekEvent == nullptr )
+//        h->_XPeekEvent = reinterpret_cast<decltype(XPeekEvent)*>(real_dlsym(RTLD_NEXT, "XPeekEvent"));
+//
+//    return X11_Hook::MyXPeekEvent(display, mode);
+//}
+
+//extern "C" int XNextEvent(Display *display, XEvent *event)
+//{
+//    auto h = X11_Hook::Inst();
+//    if( h->_XNextEvent == nullptr )
+//        h->_XNextEvent = reinterpret_cast<decltype(XNextEvent)*>(real_dlsym(RTLD_NEXT, "XNextEvent"));
+//
+//    return X11_Hook::MyXNextEvent(display, mode);
+//}
+
+extern "C" int XPending(Display *display)
+{
+    auto h = X11_Hook::Inst();
+    if( h->_XPending == nullptr )
+        h->_XPending = reinterpret_cast<decltype(XPending)*>(real_dlsym(RTLD_NEXT, "XPending"));
+
+    return X11_Hook::MyXPending(display);
+}
+
+extern "C" void glXSwapBuffers(Display *display, GLXDrawable drawable)
+{
+    OpenGLX_Hook::Inst()->start_hook();
+    OpenGLX_Hook::MyglXSwapBuffers(display, drawable);
+}
+
+extern "C" __GLXextFuncPtr glXGetProcAddress(const GLubyte * procName)
+{
+    if( strcmp((const char*)procName, "glXSwapBuffers") == 0 )
+    {
+        decltype(glXSwapBuffers)* real_glXSwapBuffers = (decltype(real_glXSwapBuffers))real_glXGetProcAddress(procName);
+        OpenGLX_Hook::Inst()->loadFunctions(real_glXSwapBuffers);
+        return (__GLXextFuncPtr)glXSwapBuffers;
+    }
+
+    __GLXextFuncPtr func = (__GLXextFuncPtr)real_glXGetProcAddress(procName);
+
+    return func;
+}
+
+extern "C" __GLXextFuncPtr glXGetProcAddressARB (const GLubyte* procName)
+{
+    if( strcmp((const char*)procName, "glXSwapBuffers") == 0 )
+    {
+        decltype(glXSwapBuffers)* real_glXSwapBuffers = (decltype(real_glXSwapBuffers))real_glXGetProcAddressARB(procName);
+        OpenGLX_Hook::Inst()->loadFunctions(real_glXSwapBuffers);
+        return (__GLXextFuncPtr)glXSwapBuffers;
+    }
+
+    __GLXextFuncPtr func = (__GLXextFuncPtr)real_glXGetProcAddressARB(procName);
+
+    return func;
+}
+
+void Renderer_Detector::find_renderer_proc(Renderer_Detector* _this)
+{
+    /*
+    _this->rendererdetect_hook = new Base_Hook();
+    Hook_Manager& hm = Hook_Manager::Inst();
+    hm.AddHook(_this->rendererdetect_hook);
+    */
+}
+
+Renderer_Detector::Renderer_Detector():
+    _hook_thread(nullptr),
+    _hook_retries(0),
+    _renderer_found(false),
+    _oglx_hooked(false),
+    rendererdetect_hook(nullptr),
+    game_renderer(nullptr)
+{}
+
+extern "C" void* dlsym(void* handle, const char* name)
+{
+    if (real_dlsym == nullptr)
+        real_dlsym = (decltype(dlsym)*)_dl_sym(RTLD_NEXT, "dlsym", reinterpret_cast<void*>(dlsym));
+
+    if ( strcmp(name,"dlsym") == 0 )
+        return (void*)dlsym;
+
+    if( strcmp(name, "glXGetProcAddress") == 0 )
+    {
+        if( real_glXGetProcAddress == nullptr )
+        {
+            real_glXGetProcAddress = (decltype(glXGetProcAddress)*)real_dlsym(RTLD_NEXT, "glXGetProcAddress");
+        }
+        return (void*)glXGetProcAddress;
+    }
+    if( strcmp(name, "glXGetProcAddressARB") == 0 )
+    {
+        if( real_glXGetProcAddressARB == nullptr )
+        {
+            real_glXGetProcAddressARB = (decltype(glXGetProcAddressARB)*)real_dlsym(RTLD_NEXT, "glXGetProcAddressARB");
+        }
+        return (void*)glXGetProcAddressARB;
+    }
+    if( strcmp(name, "XEventsQueued") == 0 )
+    {
+        return (void*)XEventsQueued;
+    }
+    //if( strcmp(name, "XNextEvent") == 0 )
+    //{
+    //    return (void*)XNextEvent;
+    //}
+    //if( strcmp(name, "XPeekEvent") == 0 )
+    //{
+    //    return (void*)XPeekEvent;
+    //}
+    if( strcmp(name, "XPending") == 0 )
+    {
+        return (void*)XPending;
+    }
+
+    return real_dlsym(handle,name);
+}
+
+#endif
+
+void Renderer_Detector::renderer_found(Base_Hook* hook)
+{
+    std::lock_guard<std::mutex> lock(_found_mutex);
+    Hook_Manager& hm = Hook_Manager::Inst();
+
+    _renderer_found = true;
+    game_renderer = hook;
+
+    if (hook == nullptr)
+        PRINT_DEBUG("We found a renderer but couldn't hook it, aborting overlay hook.\n");
+    else
+        PRINT_DEBUG("Hooked renderer in %d/%d tries\n", _hook_retries, max_hook_retries);
+
+    hm.RemoveHook(rendererdetect_hook);
+}
+
+bool Renderer_Detector::stop_retry()
+{
+    // Retry or not
+    bool stop = ++_hook_retries >= max_hook_retries;
+
+    if (stop)
+        renderer_found(nullptr);
+
+    return stop;
+}
+
+void Renderer_Detector::find_renderer()
+{
+    if (_hook_thread == nullptr)
+    {
+        _hook_thread = new std::thread(&Renderer_Detector::find_renderer_proc, this);
+        _hook_thread->detach();
+    }
+}
+
+Renderer_Detector& Renderer_Detector::Inst()
+{
+    static Renderer_Detector inst;
+    return inst;
+}
+
+Base_Hook* Renderer_Detector::get_renderer() const
+{
+    return game_renderer;
+}
+
+Renderer_Detector::~Renderer_Detector()
+{
+    if (_hook_thread != nullptr)
+    {
+        _hook_retries = max_hook_retries;
+    }
+}

overlay_experimental/Renderer_Detector.h

@@ -0,0 +1,105 @@
+#ifndef __INCLUDED_RENDERER_DETECTOR_H__
+#define __INCLUDED_RENDERER_DETECTOR_H__
+
+#include "Base_Hook.h"
+#include <thread>
+
+#ifndef NO_OVERLAY
+#ifdef __WINDOWS__
+
+struct IDXGISwapChain;
+struct IDirect3DDevice9;
+struct IDirect3DDevice9Ex;
+
+class Renderer_Detector
+{
+private:
+    // Variables
+    std::thread* _hook_thread;
+    std::mutex _found_mutex;
+    unsigned int _hook_retries;
+    bool _renderer_found;       // Is the renderer hooked ?
+    bool _dx9_hooked;
+    bool _dx10_hooked;
+    bool _dx11_hooked;
+    bool _dx12_hooked;
+    bool _dxgi_hooked;
+    bool _ogl_hooked;           // wglMakeCurrent is hooked ? (opengl)
+    Base_Hook* rendererdetect_hook;
+    Base_Hook* game_renderer;
+
+    ATOM atom;
+    HWND dummy_hWnd;
+
+    // Functions
+    Renderer_Detector();
+    ~Renderer_Detector();
+
+    static HRESULT STDMETHODCALLTYPE MyIDXGISwapChain_Present(IDXGISwapChain* _this, UINT SyncInterval, UINT Flags);
+    static HRESULT STDMETHODCALLTYPE MyPresent(IDirect3DDevice9* _this, CONST RECT* pSourceRect, CONST RECT* pDestRect, HWND hDestWindowOverride, CONST RGNDATA* pDirtyRegion);
+    static HRESULT STDMETHODCALLTYPE MyPresentEx(IDirect3DDevice9Ex* _this, CONST RECT* pSourceRect, CONST RECT* pDestRect, HWND hDestWindowOverride, CONST RGNDATA* pDirtyRegion, DWORD dwFlags);
+    static BOOL WINAPI MywglMakeCurrent(HDC hDC, HGLRC hGLRC);
+
+    void HookDXGIPresent(IDXGISwapChain* pSwapChain);
+    void HookDX9Present(IDirect3DDevice9* pDevice, bool ex);
+    void HookwglMakeCurrent(decltype(wglMakeCurrent)* wglMakeCurrent);
+
+    void hook_dx9();
+    void hook_dx10();
+    void hook_dx11();
+    void hook_dx12();
+    void hook_opengl();
+
+    void create_hwnd();
+    void destroy_hwnd();
+    void create_hook(const char* libname);
+    bool stop_retry();
+
+    static void find_renderer_proc(Renderer_Detector* _this);
+
+public:
+    void find_renderer();
+    void renderer_found(Base_Hook* hook);
+    Base_Hook* get_renderer() const;
+    static Renderer_Detector& Inst();
+};
+
+#elif defined __LINUX__
+#include "linux/OpenGLX_Hook.h"
+
+class Renderer_Detector
+{
+    // Variables
+    std::thread* _hook_thread;
+    std::mutex _found_mutex;
+    unsigned int _hook_retries;
+    bool _oglx_hooked;
+    bool _renderer_found;       // Is the renderer hooked ?
+    Base_Hook* rendererdetect_hook;
+    Base_Hook* game_renderer;
+
+    // Functions
+    Renderer_Detector();
+    ~Renderer_Detector();
+
+    static void MyglXSwapBuffers(Display *dpy, GLXDrawable drawable);
+
+    void HookglXSwapBuffers(decltype(glXSwapBuffers)* glXSwapBuffers);
+
+    void hook_openglx(const char* libname);
+
+    void create_hook(const char* libname);
+    bool stop_retry();
+
+    static void find_renderer_proc(Renderer_Detector* _this);
+
+public:
+    void find_renderer();
+    void renderer_found(Base_Hook* hook);
+    Base_Hook* get_renderer() const;
+    static Renderer_Detector& Inst();
+};
+
+#endif//__WINDOWS__
+#endif//NO_OVERLAY
+#endif//__INCLUDED_RENDERER_DETECTOR_H__

overlay_experimental/linux/OpenGLX_Hook.cpp

@@ -0,0 +1,175 @@
+#include "OpenGLX_Hook.h"
+#include "X11_Hook.h"
+#include "../Renderer_Detector.h"
+#include "../dll/dll.h"
+
+#ifdef __LINUX__
+#ifndef NO_OVERLAY
+
+#include <imgui.h>
+#include <impls/imgui_impl_opengl3.h>
+
+#include "../steam_overlay.h"
+
+OpenGLX_Hook* OpenGLX_Hook::_inst = nullptr;
+
+bool OpenGLX_Hook::start_hook()
+{
+    bool res = true;
+    if (!hooked)
+    {
+        if (!X11_Hook::Inst()->start_hook())
+            return false;
+
+        GLenum err = glewInit();
+
+        if (err == GLEW_OK)
+        {
+            PRINT_DEBUG("Hooked OpenGLX\n");
+
+            hooked = true;
+            Renderer_Detector::Inst().renderer_found(this);
+
+            /*
+            UnhookAll();
+            BeginHook();
+            HookFuncs(
+                std::make_pair<void**, void*>(&(void*&)_glXSwapBuffers, (void*)&OpenGLX_Hook::MyglXSwapBuffers)
+            );
+            EndHook();
+            */
+
+            get_steam_client()->steam_overlay->HookReady();
+        }
+        else
+        {
+            PRINT_DEBUG("Failed to hook OpenGLX\n");
+            /* Problem: glewInit failed, something is seriously wrong. */
+            PRINT_DEBUG("Error: %s\n", glewGetErrorString(err));
+            res = false;
+        }
+    }
+    return true;
+}
+
+void OpenGLX_Hook::resetRenderState()
+{
+    if (initialized)
+    {
+        ImGui_ImplOpenGL3_Shutdown();
+        X11_Hook::Inst()->resetRenderState();
+        ImGui::DestroyContext();
+
+        glXDestroyContext(display, context);
+        display = nullptr;
+        initialized = false;
+    }
+}
+
+// Try to make this function and overlay's proc as short as possible or it might affect game's fps.
+void OpenGLX_Hook::prepareForOverlay(Display* display, GLXDrawable drawable)
+{
+    PRINT_DEBUG("Called SwapBuffer hook");
+
+    if( (Window)drawable != X11_Hook::Inst()->get_game_wnd() )
+        X11_Hook::Inst()->resetRenderState();
+
+    if( ! initialized )
+    {
+        ImGui::CreateContext();
+        ImGuiIO& io = ImGui::GetIO();
+        io.IniFilename = NULL;
+
+        ImGui_ImplOpenGL3_Init();
+
+        int attributes[] = { //can't be const b/c X11 doesn't like it.  Not sure if that's intentional or just stupid.
+            GLX_RGBA, //apparently nothing comes after this?
+            GLX_RED_SIZE,    8,
+            GLX_GREEN_SIZE,  8,
+            GLX_BLUE_SIZE,   8,
+            GLX_ALPHA_SIZE,  8,
+            //Ideally, the size would be 32 (or at least 24), but I have actually seen
+            //  this size (on a modern OS even).
+            GLX_DEPTH_SIZE, 16,
+            GLX_DOUBLEBUFFER, True,
+            None
+        };
+
+        XVisualInfo* visual_info = glXChooseVisual(display, DefaultScreen(display), attributes);
+
+        context = glXCreateContext(display, visual_info, nullptr, True);
+        this->display = display;
+
+        get_steam_client()->steam_overlay->CreateFonts();
+
+        initialized = true;
+    }
+
+    auto oldContext = glXGetCurrentContext();
+
+    glXMakeCurrent(display, drawable, context);
+
+    ImGui_ImplOpenGL3_NewFrame();
+    X11_Hook::Inst()->prepareForOverlay(display, (Window)drawable);
+
+    ImGui::NewFrame();
+
+    get_steam_client()->steam_overlay->OverlayProc();
+
+    ImGui::Render();
+
+    ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
+
+    glXMakeCurrent(display, drawable, oldContext);
+}
+
+void OpenGLX_Hook::MyglXSwapBuffers(Display* display, GLXDrawable drawable)
+{
+    OpenGLX_Hook::Inst()->prepareForOverlay(display, drawable);
+    OpenGLX_Hook::Inst()->_glXSwapBuffers(display, drawable);
+}
+
+OpenGLX_Hook::OpenGLX_Hook():
+    initialized(false),
+    hooked(false),
+    _glXSwapBuffers(nullptr)
+{
+    //_library = dlopen(DLL_NAME);
+}
+
+OpenGLX_Hook::~OpenGLX_Hook()
+{
+    PRINT_DEBUG("OpenGLX Hook removed\n");
+
+    if (initialized)
+    {
+        ImGui_ImplOpenGL3_Shutdown();
+        ImGui::DestroyContext();
+        glXDestroyContext(display, context);
+    }
+
+    //dlclose(_library);
+
+    _inst = nullptr;
+}
+
+OpenGLX_Hook* OpenGLX_Hook::Inst()
+{
+    if (_inst == nullptr)
+        _inst = new OpenGLX_Hook;
+
+    return _inst;
+}
+
+const char* OpenGLX_Hook::get_lib_name() const
+{
+    return DLL_NAME;
+}
+
+void OpenGLX_Hook::loadFunctions(decltype(glXSwapBuffers)* pfnglXSwapBuffers)
+{
+    _glXSwapBuffers = pfnglXSwapBuffers;
+}
+
+#endif//NO_OVERLAY
+#endif//__LINUX__

overlay_experimental/linux/OpenGLX_Hook.h

@@ -0,0 +1,49 @@
+#ifndef __INCLUDED_OPENGLX_HOOK_H__
+#define __INCLUDED_OPENGLX_HOOK_H__
+
+#include "../Base_Hook.h"
+
+#ifdef __LINUX__
+#ifndef NO_OVERLAY
+#include <GL/glew.h>
+#include <GL/glx.h>
+
+class OpenGLX_Hook : public Base_Hook
+{
+public:
+    static constexpr const char *DLL_NAME = "libGLX.so";
+
+private:
+    static OpenGLX_Hook* _inst;
+
+    // Variables
+    bool hooked;
+    bool initialized;
+    Display *display;
+    GLXContext context;
+
+    // Functions
+    OpenGLX_Hook();
+
+    void resetRenderState();
+    void prepareForOverlay(Display* display, GLXDrawable drawable);
+
+    // Hook to render functions
+
+
+    decltype(glXSwapBuffers)* _glXSwapBuffers;
+
+public:
+    static void MyglXSwapBuffers(Display* display, GLXDrawable drawable);
+
+    virtual ~OpenGLX_Hook();
+
+    bool start_hook();
+    static OpenGLX_Hook* Inst();
+    virtual const char* get_lib_name() const;
+    void loadFunctions(decltype(glXSwapBuffers)* pfnglXSwapBuffers);
+};
+
+#endif//NO_OVERLAY
+#endif//__LINUX__
+#endif//__INCLUDED_OPENGLX_HOOK_H__

overlay_experimental/linux/X11_Hook.cpp

@@ -0,0 +1,205 @@
+#include "X11_Hook.h"
+#include "../Renderer_Detector.h"
+#include "../dll/dll.h"
+
+#ifdef __LINUX__
+#ifndef NO_OVERLAY
+
+#include <imgui.h>
+#include <impls/linux/imgui_impl_x11.h>
+
+#include <dlfcn.h>
+#include <unistd.h>
+#include <fstream>
+
+extern int ImGui_ImplX11_EventHandler(XEvent &event);
+
+X11_Hook* X11_Hook::_inst = nullptr;
+
+bool X11_Hook::start_hook()
+{
+    bool res = true;
+    if (!hooked)
+    {
+        PRINT_DEBUG("Hooked X11\n");
+        hooked = true;
+    }
+    return res;
+}
+
+void X11_Hook::resetRenderState()
+{
+    if (initialized)
+    {
+        game_wnd = 0;
+        initialized = false;
+        ImGui_ImplX11_Shutdown();
+    }
+}
+
+void X11_Hook::prepareForOverlay(Display *display, Window wnd)
+{
+    if (!initialized)
+    {
+        ImGui_ImplX11_Init(display, (void*)wnd);
+
+        game_wnd = wnd;
+
+        initialized = true;
+    }
+
+    ImGui_ImplX11_NewFrame();
+}
+
+/////////////////////////////////////////////////////////////////////////////////////
+// X11 window hooks
+bool IgnoreEvent(XEvent &event)
+{
+    switch(event.type)
+    {
+        // Keyboard
+        case KeyPress: case KeyRelease:
+        // MouseButton
+        case ButtonPress: case ButtonRelease:
+        // Mouse move
+        case MotionNotify:
+            return true;
+    }
+    return false;
+}
+
+int X11_Hook::check_for_overlay(Display *d, int num_events)
+{
+    static Time prev_time = {};
+
+    X11_Hook* inst = Inst();
+
+    if( inst->initialized )
+    {
+        XEvent event;
+        while(num_events)
+        {
+            //inst->_XPeekEvent(d, &event);
+            XPeekEvent(d, &event);
+
+            Steam_Overlay* overlay = get_steam_client()->steam_overlay;
+            bool show = overlay->ShowOverlay();
+            // Is the event is a key press
+            if (event.type == KeyPress)
+            {
+                // Tab is pressed and was not pressed before
+                //if (event.xkey.keycode == inst->_XKeysymToKeycode(d, XK_Tab) && event.xkey.state & ShiftMask)
+                if (event.xkey.keycode == XKeysymToKeycode(d, XK_Tab) && event.xkey.state & ShiftMask)
+                {
+                    // if key TAB is held, don't make the overlay flicker :p
+                    if( event.xkey.time != prev_time)
+                    {
+                        overlay->ShowOverlay(!overlay->ShowOverlay());
+
+                        if (overlay->ShowOverlay())
+                            show = true;
+                    }
+                }
+            }
+            //else if(event.type == KeyRelease && event.xkey.keycode == inst->_XKeysymToKeycode(d, XK_Tab))
+            else if(event.type == KeyRelease && event.xkey.keycode == XKeysymToKeycode(d, XK_Tab))
+            {
+                prev_time = event.xkey.time;
+            }
+
+            if (show)
+            {
+                ImGui_ImplX11_EventHandler(event);
+
+                if (IgnoreEvent(event))
+                {
+                    //inst->_XNextEvent(d, &event);
+                    XNextEvent(d, &event);
+                    --num_events;
+                }
+                else
+                    break;
+            }
+            else
+                break;
+        }
+    }
+    return num_events;
+}
+
+int X11_Hook::MyXEventsQueued(Display *display, int mode)
+{
+    X11_Hook* inst = X11_Hook::Inst();
+
+    int res = inst->_XEventsQueued(display, mode);
+
+    if( res )
+    {
+        res = inst->check_for_overlay(display, res);
+    }
+
+    return res;
+}
+
+int X11_Hook::MyXNextEvent(Display* display, XEvent *event)
+{
+    return Inst()->_XNextEvent(display, event);
+}
+
+int X11_Hook::MyXPeekEvent(Display* display, XEvent *event)
+{
+    return Inst()->_XPeekEvent(display, event);
+}
+
+int X11_Hook::MyXPending(Display* display)
+{
+    int res = Inst()->_XPending(display);
+
+    if( res )
+    {
+        res = Inst()->check_for_overlay(display, res);
+    }
+
+    return res;
+}
+
+/////////////////////////////////////////////////////////////////////////////////////
+
+X11_Hook::X11_Hook() :
+    initialized(false),
+    hooked(false),
+    game_wnd(0),
+    _XEventsQueued(nullptr),
+    _XPeekEvent(nullptr),
+    _XNextEvent(nullptr),
+    _XPending(nullptr)
+{
+    //_library = dlopen(DLL_NAME, RTLD_NOW);
+}
+
+X11_Hook::~X11_Hook()
+{
+    PRINT_DEBUG("X11 Hook removed\n");
+
+    resetRenderState();
+
+    //dlclose(_library);
+
+    _inst = nullptr;
+}
+
+X11_Hook* X11_Hook::Inst()
+{
+    if (_inst == nullptr)
+        _inst = new X11_Hook;
+
+    return _inst;
+}
+
+const char* X11_Hook::get_lib_name() const
+{
+    return DLL_NAME;
+}
+
+#endif//NO_OVERLAY
+#endif//#__LINUX__

overlay_experimental/linux/X11_Hook.h

@@ -0,0 +1,63 @@
+#ifndef __INCLUDED_X11_HOOK_H__
+#define __INCLUDED_X11_HOOK_H__
+
+#include "../Base_Hook.h"
+
+#ifdef __LINUX__
+#ifndef NO_OVERLAY
+
+#include <X11/X.h> // XEvent types
+#include <X11/Xlib.h> // XEvent structure
+
+extern "C" int XEventsQueued(Display *display, int mode);
+extern "C" int XPending(Display *display);
+
+class X11_Hook : public Base_Hook
+{
+public:
+    friend int XEventsQueued(Display *display, int mode);
+    friend int XPending(Display *display);
+    static constexpr const char* DLL_NAME = "libX11.so";
+
+private:
+    static X11_Hook* _inst;
+
+    // Variables
+    bool hooked;
+    bool initialized;
+    Window game_wnd;
+
+    // Functions
+    X11_Hook();
+    int check_for_overlay(Display *d, int num_events);
+
+    // Hook to X11 window messages
+    decltype(XEventsQueued)* _XEventsQueued;
+    decltype(XPeekEvent)* _XPeekEvent;
+    decltype(XNextEvent)* _XNextEvent;
+    decltype(XPending)* _XPending;
+    //decltype(XKeysymToKeycode)* _XKeysymToKeycode;
+    //decltype(XLookupKeysym)* _XLookupKeysym;
+    //decltype(XGetGeometry)* _XGetGeometry;
+
+    static int MyXEventsQueued(Display * display, int mode);
+    static int MyXNextEvent(Display* display, XEvent *event);
+    static int MyXPeekEvent(Display* display, XEvent *event);
+    static int MyXPending(Display* display);
+
+public:
+    virtual ~X11_Hook();
+
+    void resetRenderState();
+    void prepareForOverlay(Display *display, Window wnd);
+
+    Window get_game_wnd() const{ return game_wnd; }
+
+    bool start_hook();
+    static X11_Hook* Inst();
+    virtual const char* get_lib_name() const;
+};
+
+#endif//NO_OVERLAY
+#endif//__LINUX__
+#endif//__INCLUDED_X11_HOOK_H__

overlay_experimental/steam_overlay.cpp

@@ -0,0 +1,801 @@
+#include "steam_overlay.h"
+
+#ifndef NO_OVERLAY
+
+#include <thread>
+#include <string>
+#include <sstream>
+#include <cctype>
+#include <imgui.h>
+
+#include "../dll/dll.h"
+
+#include "Renderer_Detector.h"
+
+static constexpr int max_window_id = 10000;
+static constexpr int base_notif_window_id  = 0 * max_window_id;
+static constexpr int base_friend_window_id = 1 * max_window_id;
+static constexpr int base_friend_item_id   = 2 * max_window_id;
+
+int find_free_id(std::vector<int> & ids, int base)
+{
+    std::sort(ids.begin(), ids.end());
+
+    int id = base;
+    for (auto i : ids)
+    {
+        if (id < i)
+            break;
+        id = i + 1;
+    }
+
+    return id > (base+max_window_id) ? 0 : id;
+}
+
+int find_free_friend_id(std::map<Friend, friend_window_state, Friend_Less> const& friend_windows)
+{
+    std::vector<int> ids;
+    ids.reserve(friend_windows.size());
+
+    std::for_each(friend_windows.begin(), friend_windows.end(), [&ids](std::pair<Friend const, friend_window_state> const& i)
+    {
+        ids.emplace_back(i.second.id);
+    });
+    
+    return find_free_id(ids, base_friend_window_id);
+}
+
+int find_free_notification_id(std::vector<Notification> const& notifications)
+{
+    std::vector<int> ids;
+    ids.reserve(notifications.size());
+
+    std::for_each(notifications.begin(), notifications.end(), [&ids](Notification const& i)
+    {
+        ids.emplace_back(i.id);
+    });
+    
+
+    return find_free_id(ids, base_friend_window_id);
+}
+
+#ifdef __WINDOWS__
+#include "windows/Windows_Hook.h"
+#endif
+
+#include "notification.h"
+
+void Steam_Overlay::steam_overlay_run_every_runcb(void* object)
+{
+    Steam_Overlay* _this = reinterpret_cast<Steam_Overlay*>(object);
+    _this->RunCallbacks();
+}
+
+void Steam_Overlay::steam_overlay_callback(void* object, Common_Message* msg)
+{
+    Steam_Overlay* _this = reinterpret_cast<Steam_Overlay*>(object);
+    _this->Callback(msg);
+}
+
+Steam_Overlay::Steam_Overlay(Settings* settings, SteamCallResults* callback_results, SteamCallBacks* callbacks, RunEveryRunCB* run_every_runcb, Networking* network) :
+    settings(settings),
+    callback_results(callback_results),
+    callbacks(callbacks),
+    run_every_runcb(run_every_runcb),
+    network(network),
+    setup_overlay_called(false),
+    show_overlay(false),
+    is_ready(false),
+    notif_position(ENotificationPosition::k_EPositionBottomLeft),
+    h_inset(0),
+    v_inset(0),
+    overlay_state_changed(false)
+{
+    run_every_runcb->add(&Steam_Overlay::steam_overlay_run_every_runcb, this);
+    this->network->setCallback(CALLBACK_ID_STEAM_MESSAGES, settings->get_local_steam_id(), &Steam_Overlay::steam_overlay_callback, this);
+}
+
+Steam_Overlay::~Steam_Overlay()
+{
+    run_every_runcb->remove(&Steam_Overlay::steam_overlay_run_every_runcb, this);
+}
+
+bool Steam_Overlay::Ready() const
+{
+    return is_ready;
+}
+
+bool Steam_Overlay::NeedPresent() const
+{
+    return true;
+}
+
+void Steam_Overlay::SetNotificationPosition(ENotificationPosition eNotificationPosition)
+{
+    notif_position = eNotificationPosition;
+}
+
+void Steam_Overlay::SetNotificationInset(int nHorizontalInset, int nVerticalInset)
+{
+    h_inset = nHorizontalInset;
+    v_inset = nVerticalInset;
+}
+
+void Steam_Overlay::SetupOverlay()
+{
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+    if (!setup_overlay_called)
+    {
+        setup_overlay_called = true;
+        Renderer_Detector::Inst().find_renderer();
+    }
+}
+
+void Steam_Overlay::HookReady()
+{
+    if (!is_ready)
+    {
+        // TODO: Uncomment this and draw our own cursor (cosmetics)
+        //ImGuiIO &io = ImGui::GetIO();
+        //io.WantSetMousePos = false;
+        //io.MouseDrawCursor = false;
+        //io.ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange;
+
+        is_ready = true;
+    }
+}
+
+void Steam_Overlay::OpenOverlayInvite(CSteamID lobbyId)
+{
+    ShowOverlay(true);
+}
+
+void Steam_Overlay::OpenOverlay(const char* pchDialog)
+{
+    // TODO: Show pages depending on pchDialog
+    ShowOverlay(true);
+}
+
+bool Steam_Overlay::ShowOverlay() const
+{
+    return show_overlay;
+}
+
+void Steam_Overlay::ShowOverlay(bool state)
+{
+    if (!Ready() || show_overlay == state)
+        return;
+
+    ImGuiIO &io = ImGui::GetIO();
+
+    if(state)
+    {
+        io.MouseDrawCursor = true;
+    }
+    else
+    {
+        io.MouseDrawCursor = false;
+    }
+
+#ifdef __WINDOWS__
+    static RECT old_clip;
+
+    if (state)
+    {
+        HWND game_hwnd = Windows_Hook::Inst()->GetGameHwnd();
+        RECT cliRect, wndRect, clipRect;
+
+        GetClipCursor(&old_clip);
+        // The window rectangle has borders and menus counted in the size
+        GetWindowRect(game_hwnd, &wndRect);
+        // The client rectangle is the window without borders
+        GetClientRect(game_hwnd, &cliRect);
+
+        clipRect = wndRect; // Init clip rectangle
+
+        // Get Window width with borders
+        wndRect.right -= wndRect.left;
+        // Get Window height with borders & menus
+        wndRect.bottom -= wndRect.top;
+        // Compute the border width
+        int borderWidth = (wndRect.right - cliRect.right) / 2;
+        // Client top clip is the menu bar width minus bottom border
+        clipRect.top += wndRect.bottom - cliRect.bottom - borderWidth;
+        // Client left clip is the left border minus border width
+        clipRect.left += borderWidth;
+        // Here goes the same for right and bottom
+        clipRect.right -= borderWidth;
+        clipRect.bottom -= borderWidth;
+
+        ClipCursor(&clipRect);
+    }
+    else
+    {
+        ClipCursor(&old_clip);
+    }
+
+#else
+
+#endif
+
+    show_overlay = state;
+    overlay_state_changed = true;
+}
+
+void Steam_Overlay::NotifyUser(friend_window_state& friend_state)
+{
+    if (!(friend_state.window_state & window_state_show) || !show_overlay)
+    {
+        friend_state.window_state |= window_state_need_attention;
+#ifdef __WINDOWS__
+        PlaySound((LPCSTR)notif_invite_wav, NULL, SND_ASYNC | SND_MEMORY);
+#endif
+    }
+}
+
+void Steam_Overlay::SetLobbyInvite(Friend friendId, uint64 lobbyId)
+{
+    if (!Ready())
+        return;
+
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+    auto i = friends.find(friendId);
+    if (i != friends.end())
+    {
+        auto& frd = i->second;
+        frd.lobbyId = lobbyId;
+        frd.window_state |= window_state_lobby_invite;
+        // Make sure don't have rich presence invite and a lobby invite (it should not happen but who knows)
+        frd.window_state &= ~window_state_rich_invite;
+        AddInviteNotification(*i);
+        NotifyUser(i->second);
+    }
+}
+
+void Steam_Overlay::SetRichInvite(Friend friendId, const char* connect_str)
+{
+    if (!Ready())
+        return;
+
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+    auto i = friends.find(friendId);
+    if (i != friends.end())
+    {
+        auto& frd = i->second;
+        strncpy(frd.connect, connect_str, k_cchMaxRichPresenceValueLength - 1);
+        frd.window_state |= window_state_rich_invite;
+        // Make sure don't have rich presence invite and a lobby invite (it should not happen but who knows)
+        frd.window_state &= ~window_state_lobby_invite;
+        AddInviteNotification(*i);
+        NotifyUser(i->second);
+    }
+}
+
+void Steam_Overlay::FriendConnect(Friend _friend)
+{
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+    int id = find_free_friend_id(friends);
+    if (id != 0)
+    {
+        auto& item = friends[_friend];
+        item.window_title = std::move(_friend.name() + " playing " + std::to_string(_friend.appid()));
+        item.window_state = window_state_none;
+        item.id = id;
+        memset(item.chat_input, 0, max_chat_len);
+    }
+    else
+        PRINT_DEBUG("No more free id to create a friend window\n");
+}
+
+void Steam_Overlay::FriendDisconnect(Friend _friend)
+{
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+    auto it = friends.find(_friend);
+    if (it != friends.end())
+        friends.erase(it);
+}
+
+void Steam_Overlay::AddMessageNotification(std::string const& message)
+{
+    int id = find_free_notification_id(notifications);
+    if (id != 0)
+    {
+        Notification notif;
+        notif.id = id;
+        notif.type = notification_type_message;
+        notif.message = message;
+        notif.start_time = std::chrono::duration_cast<std::chrono::seconds>(std::chrono::system_clock::now().time_since_epoch());
+        notifications.emplace_back(notif);
+    }
+    else
+        PRINT_DEBUG("No more free id to create a notification window\n");
+}
+
+void Steam_Overlay::AddAchievementNotification(nlohmann::json const& ach)
+{
+    int id = find_free_notification_id(notifications);
+    if (id != 0)
+    {
+        Notification notif;
+        notif.id = id;
+        notif.type = notification_type_achievement;
+        // Load achievement image
+        notif.message = ach["displayName"].get<std::string>() + "\n" + ach["description"].get<std::string>();
+        notif.start_time = std::chrono::duration_cast<std::chrono::seconds>(std::chrono::system_clock::now().time_since_epoch());
+        notifications.emplace_back(notif);
+    }
+    else
+        PRINT_DEBUG("No more free id to create a notification window\n");
+}
+
+void Steam_Overlay::AddInviteNotification(std::pair<const Friend, friend_window_state>& wnd_state)
+{
+    int id = find_free_notification_id(notifications);
+    if (id != 0)
+    {
+        Notification notif;
+        notif.id = id;
+        notif.type = notification_type_invite;
+        notif.frd = &wnd_state;
+        notif.message = wnd_state.first.name() + " invited you to join a game";
+        notif.start_time = std::chrono::duration_cast<std::chrono::seconds>(std::chrono::system_clock::now().time_since_epoch());
+        notifications.emplace_back(notif);
+    }
+    else
+        PRINT_DEBUG("No more free id to create a notification window\n");
+}
+
+bool Steam_Overlay::FriendHasLobby(uint64 friend_id)
+{
+    Steam_Friends* steamFriends = get_steam_client()->steam_friends;
+
+    if( std::string(steamFriends->GetFriendRichPresence(friend_id, "connect")).length() > 0 )
+        return true;
+
+    FriendGameInfo_t friend_game_info = {};
+    steamFriends->GetFriendGamePlayed(friend_id, &friend_game_info);
+    if (friend_game_info.m_steamIDLobby.IsValid())
+        return true;
+
+    return false;
+}
+
+bool Steam_Overlay::IHaveLobby()
+{
+    Steam_Friends* steamFriends = get_steam_client()->steam_friends;
+    if (std::string(steamFriends->GetFriendRichPresence(settings->get_local_steam_id(), "connect")).length() > 0)
+        return true;
+
+    if (settings->get_lobby().IsValid())
+        return true;
+
+    return false;
+}
+
+void Steam_Overlay::BuildContextMenu(Friend const& frd, friend_window_state& state)
+{
+    if (ImGui::BeginPopupContextItem("Friends_ContextMenu", 1))
+    {
+        bool close_popup = false;
+
+        if (ImGui::Button("Chat"))
+        {
+            state.window_state |= window_state_show;
+            close_popup = true;
+        }
+        // If we have the same appid, activate the invite/join buttons
+        if (settings->get_local_game_id().AppID() == frd.appid())
+        {
+            if (IHaveLobby() && ImGui::Button("Invite###PopupInvite"))
+            {
+                state.window_state |= window_state_invite;
+                has_friend_action.push(frd);
+                close_popup = true;
+            }
+            if (FriendHasLobby(frd.id()) && ImGui::Button("Join###PopupJoin"))
+            {
+                state.window_state |= window_state_join;
+                has_friend_action.push(frd);
+                close_popup = true;
+            }
+        }
+        if( close_popup)
+        {
+            ImGui::CloseCurrentPopup();
+        }
+
+        ImGui::EndPopup();
+    }
+}
+
+void Steam_Overlay::BuildFriendWindow(Friend const& frd, friend_window_state& state)
+{
+    if (!(state.window_state & window_state_show))
+        return;
+
+    bool show = true;
+    bool send_chat_msg = false;
+
+    float width = ImGui::CalcTextSize("AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA").x;
+    
+    if (state.window_state & window_state_need_attention && ImGui::IsWindowFocused())
+    {
+        state.window_state &= ~window_state_need_attention;
+    }
+    ImGui::SetNextWindowSizeConstraints(ImVec2{ width, ImGui::GetFontSize()*8 + ImGui::GetItemsLineHeightWithSpacing()*4 },
+        ImVec2{ std::numeric_limits<float>::max() , std::numeric_limits<float>::max() });
+
+    // Window id is after the ###, the window title is the friend name
+    std::string friend_window_id = std::move("###" + std::to_string(state.id));
+    if (ImGui::Begin((state.window_title + friend_window_id).c_str(), &show))
+    {
+        if (state.window_state & window_state_need_attention && ImGui::IsWindowFocused())
+        {
+            state.window_state &= ~window_state_need_attention;
+        }
+
+        // Fill this with the chat box and maybe the invitation
+        if (state.window_state & (window_state_lobby_invite | window_state_rich_invite))
+        {
+            ImGui::LabelText("##label", "%s invited you to join the game.", frd.name().c_str());
+            ImGui::SameLine();
+            if (ImGui::Button("Accept"))
+            {
+                this->has_friend_action.push(frd);
+            }
+            ImGui::SameLine();
+            if (ImGui::Button("Refuse"))
+            {
+                state.window_state &= ~(window_state_lobby_invite | window_state_rich_invite);
+            }
+        }
+
+        ImGui::ColoredInputTextMultiline("##chat_history", &state.chat_history[0], state.chat_history.length(), { -1.0f, 0 }, ImGuiInputTextFlags_ReadOnly);
+
+        // TODO: Fix the layout of the chat line + send button.
+        // It should be like this: chat input should fill the window size minus send button size (button size is fixed)
+        // |------------------------------|
+        // | /--------------------------\ |
+        // | |                          | |
+        // | |       chat history       | |
+        // | |                          | |
+        // | \--------------------------/ |
+        // | [____chat line______] [send] |
+        // |------------------------------|
+        //
+        // And it is like this
+        // |------------------------------|
+        // | /--------------------------\ |
+        // | |                          | |
+        // | |       chat history       | |
+        // | |                          | |
+        // | \--------------------------/ |
+        // | [__chat line__] [send]       |
+        // |------------------------------|
+        float wnd_width = ImGui::GetWindowContentRegionWidth();
+        ImGuiStyle &style = ImGui::GetStyle();
+        wnd_width -= ImGui::CalcTextSize("Send").x + style.FramePadding.x * 2 + style.ItemSpacing.x + 1;
+
+        ImGui::PushItemWidth(wnd_width);
+        if (ImGui::InputText("##chat_line", state.chat_input, max_chat_len, ImGuiInputTextFlags_EnterReturnsTrue))
+        {
+            send_chat_msg = true;
+        }
+        ImGui::PopItemWidth();
+
+        ImGui::SameLine();
+
+        if (ImGui::Button("Send"))
+        {
+            send_chat_msg = true;
+        }
+
+        if (send_chat_msg)
+        {
+            if (!(state.window_state & window_state_send_message))
+            {
+                has_friend_action.push(frd);
+                state.window_state |= window_state_send_message;
+            }
+        }
+    }
+    // User closed the friend window
+    if (!show)
+        state.window_state &= ~window_state_show;
+
+    ImGui::End();
+}
+
+ImFont *font_default;
+ImFont *font_notif;
+
+void Steam_Overlay::BuildNotifications(int width, int height)
+{
+    auto now = std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::system_clock::now().time_since_epoch());
+    int i = 0;
+
+    int font_size = ImGui::GetFontSize();
+
+    for (auto it = notifications.begin(); it != notifications.end(); ++it, ++i)
+    {
+        auto elapsed_notif = now - it->start_time;
+
+        if ( elapsed_notif < Notification::fade_in)
+        {
+            float alpha = Notification::max_alpha * (elapsed_notif.count() / static_cast<float>(Notification::fade_in.count()));
+            ImGui::PushStyleColor(ImGuiCol_Border, ImVec4(0, 0, 0, alpha));
+            ImGui::PushStyleColor(ImGuiCol_WindowBg, ImVec4(Notification::r, Notification::g, Notification::b, alpha));
+            ImGui::PushStyleColor(ImGuiCol_Text, ImVec4(255, 255, 255, alpha*2));
+        }
+        else if ( elapsed_notif > Notification::fade_out_start)
+        {
+            float alpha = Notification::max_alpha * ((Notification::show_time - elapsed_notif).count() / static_cast<float>(Notification::fade_out.count()));
+            ImGui::PushStyleColor(ImGuiCol_Border, ImVec4(0, 0, 0, alpha));
+            ImGui::PushStyleColor(ImGuiCol_WindowBg, ImVec4(Notification::r, Notification::g, Notification::b, alpha));
+            ImGui::PushStyleColor(ImGuiCol_Text, ImVec4(255, 255, 255, alpha*2));
+        }
+        else
+        {
+            ImGui::PushStyleColor(ImGuiCol_Border, ImVec4(0, 0, 0, Notification::max_alpha));
+            ImGui::PushStyleColor(ImGuiCol_WindowBg, ImVec4(Notification::r, Notification::g, Notification::b, Notification::max_alpha));
+            ImGui::PushStyleColor(ImGuiCol_Text, ImVec4(255, 255, 255, Notification::max_alpha*2));
+        }
+        
+        ImGui::SetNextWindowPos(ImVec2((float)width - width * Notification::width, Notification::height * font_size * i ));
+        ImGui::SetNextWindowSize(ImVec2( width * Notification::width, Notification::height * font_size ));
+        ImGui::Begin(std::to_string(it->id).c_str(), nullptr, ImGuiWindowFlags_NoMove | ImGuiWindowFlags_NoBringToFrontOnFocus | 
+            ImGuiWindowFlags_NoFocusOnAppearing | ImGuiWindowFlags_NoDecoration);
+
+        switch (it->type)
+        {
+            case notification_type_achievement:
+                ImGui::TextWrapped("%s", it->message.c_str());
+                break;
+            case notification_type_invite:
+                {
+                    ImGui::TextWrapped("%s", it->message.c_str());
+                    if (ImGui::Button("Join"))
+                    {
+                        has_friend_action.push(it->frd->first);
+                        it->start_time = std::chrono::seconds(0);
+                    }
+                }
+                break;
+            case notification_type_message:
+                ImGui::TextWrapped("%s", it->message.c_str()); break;
+        }
+
+        ImGui::End();
+
+        ImGui::PopStyleColor(3);
+    }
+    notifications.erase(std::remove_if(notifications.begin(), notifications.end(), [&now](Notification &item) {
+        return (now - item.start_time) > Notification::show_time;
+    }), notifications.end());
+}
+
+void Steam_Overlay::CreateFonts()
+{
+    ImGuiIO& io = ImGui::GetIO();
+    ImFontConfig fontcfg;
+
+    fontcfg.OversampleH = fontcfg.OversampleV = 1;
+    fontcfg.PixelSnapH = true;
+    fontcfg.GlyphRanges = io.Fonts->GetGlyphRangesDefault();
+
+    fontcfg.SizePixels = std::round(io.DisplaySize.y / 68);
+    font_default = io.Fonts->AddFontDefault(&fontcfg);
+
+    fontcfg.SizePixels = std::round(io.DisplaySize.y / 60);
+    font_notif = io.Fonts->AddFontDefault(&fontcfg);
+
+    ImGuiStyle& style = ImGui::GetStyle();
+    style.WindowRounding = 0.0; // Disable round window
+}
+
+// Try to make this function as short as possible or it might affect game's fps.
+void Steam_Overlay::OverlayProc()
+{
+    std::lock_guard<std::recursive_mutex> lock(global_mutex);
+
+    if (!Ready())
+        return;
+
+    ImGuiIO& io = ImGui::GetIO();
+
+    ImGui::PushFont(font_notif);
+    BuildNotifications(io.DisplaySize.x, io.DisplaySize.y);
+    ImGui::PopFont();
+
+    if (show_overlay)
+    {
+        int friend_size = friends.size();
+
+        // Set the overlay windows to the size of the game window
+        ImGui::SetNextWindowPos({ 0,0 });
+        ImGui::SetNextWindowSize({ static_cast<float>(io.DisplaySize.x),
+                                   static_cast<float>(io.DisplaySize.y) });
+
+        ImGui::SetNextWindowBgAlpha(0.50);
+
+        ImGui::PushFont(font_default);
+
+        bool show = true;
+
+        if (ImGui::Begin("SteamOverlay", &show, ImGuiWindowFlags_NoResize | ImGuiWindowFlags_NoMove | ImGuiWindowFlags_NoCollapse | ImGuiWindowFlags_NoBringToFrontOnFocus))
+        {
+            ImGui::LabelText("##label", "Username: %s(%llu) playing %u",
+                settings->get_local_name(),
+                settings->get_local_steam_id().ConvertToUint64(),
+                settings->get_local_game_id().AppID());
+            ImGui::SameLine();
+            Base_Hook* hook = Renderer_Detector::Inst().get_renderer();
+            ImGui::LabelText("##label", "Renderer: %s", (hook == nullptr ? "Unknown" : hook->get_lib_name()));
+
+            ImGui::Spacing();
+
+            ImGui::LabelText("##label", "Friends");
+            if (!friends.empty())
+            {
+                ImGui::ListBoxHeader("##label", friend_size);
+                std::for_each(friends.begin(), friends.end(), [this](std::pair<Friend const, friend_window_state> &i)
+                {
+                    ImGui::PushID(i.second.id-base_friend_window_id+base_friend_item_id);
+
+                    ImGui::Selectable(i.second.window_title.c_str(), false, ImGuiSelectableFlags_AllowDoubleClick);
+                    BuildContextMenu(i.first, i.second);
+                    if (ImGui::IsItemClicked() && ImGui::IsMouseDoubleClicked(0))
+                    {
+                        i.second.window_state |= window_state_show;
+                    }
+                    ImGui::PopID();
+
+                    BuildFriendWindow(i.first, i.second);
+                });
+                ImGui::ListBoxFooter();
+            }
+        }
+        ImGui::End();
+
+        ImGui::PopFont();
+
+        if (!show)
+            ShowOverlay(false);
+    }// if(show_overlay)
+}
+
+void Steam_Overlay::Callback(Common_Message *msg)
+{
+    if (msg->has_steam_messages())
+    {
+        Friend frd;
+        frd.set_id(msg->source_id());
+        auto friend_info = friends.find(frd);
+        if (friend_info != friends.end())
+        {
+            Steam_Messages const& steam_message = msg->steam_messages();
+            // Change color to cyan for friend
+            friend_info->second.chat_history.append("\x1""00FFFFFF", 9).append(steam_message.message()).append("\n", 1);
+            if (!(friend_info->second.window_state & window_state_show))
+            {
+                friend_info->second.window_state |= window_state_need_attention;
+            }
+
+            AddMessageNotification(friend_info->first.name() + " says: " + steam_message.message());
+            NotifyUser(friend_info->second);
+        }
+    }
+}
+
+void Steam_Overlay::RunCallbacks()
+{
+    if (overlay_state_changed)
+    {
+        GameOverlayActivated_t data = { 0 };
+        data.m_bActive = show_overlay;
+        callbacks->addCBResult(data.k_iCallback, &data, sizeof(data));
+
+        overlay_state_changed = false;
+    }
+
+    Steam_Friends* steamFriends = get_steam_client()->steam_friends;
+    Steam_Matchmaking* steamMatchmaking = get_steam_client()->steam_matchmaking;
+
+    while (!has_friend_action.empty())
+    {
+        auto friend_info = friends.find(has_friend_action.front());
+        if (friend_info != friends.end())
+        {
+            uint64 friend_id = friend_info->first.id();
+            // The user clicked on "Send"
+            if (friend_info->second.window_state & window_state_send_message)
+            {
+                char* input = friend_info->second.chat_input;
+                char* end_input = input + strlen(input);
+                char* printable_char = std::find_if(input, end_input, [](char c) {
+                    return std::isgraph(c);
+                });
+                // Check if the message contains something else than blanks
+                if (printable_char != end_input)
+                {
+                    // Handle chat send
+                    Common_Message msg;
+                    Steam_Messages* steam_messages = new Steam_Messages;
+                    steam_messages->set_type(Steam_Messages::FRIEND_CHAT);
+                    steam_messages->set_message(friend_info->second.chat_input);
+                    msg.set_allocated_steam_messages(steam_messages);
+                    msg.set_source_id(settings->get_local_steam_id().ConvertToUint64());
+                    msg.set_dest_id(friend_id);
+                    network->sendTo(&msg, true);
+
+                    friend_info->second.chat_history.append("\x1""00FF00FF", 9).append(input).append("\n", 1);
+                }
+                *input = 0; // Reset the input field
+                friend_info->second.window_state &= ~window_state_send_message;
+            }
+            // The user clicked on "Invite"
+            if (friend_info->second.window_state & window_state_invite)
+            {
+                std::string connect = steamFriends->GetFriendRichPresence(settings->get_local_steam_id(), "connect");
+                if (connect.length() > 0)
+                    steamFriends->InviteUserToGame(friend_id, connect.c_str());
+                else if (settings->get_lobby().IsValid())
+                    steamMatchmaking->InviteUserToLobby(settings->get_lobby(), friend_id);
+
+                friend_info->second.window_state &= ~window_state_invite;
+            }
+            // The user clicked on "Join"
+            if (friend_info->second.window_state & window_state_join)
+            {
+                std::string connect = steamFriends->GetFriendRichPresence(friend_id, "connect");
+                if (connect.length() > 0)
+                {
+                    GameRichPresenceJoinRequested_t data = {};
+                    data.m_steamIDFriend.SetFromUint64(friend_id);
+                    strncpy(data.m_rgchConnect, connect.c_str(), k_cchMaxRichPresenceValueLength - 1);
+                    callbacks->addCBResult(data.k_iCallback, &data, sizeof(data));
+                }
+                else
+                {
+                    FriendGameInfo_t friend_game_info = {};
+                    steamFriends->GetFriendGamePlayed(friend_id, &friend_game_info);
+                    if (friend_game_info.m_steamIDLobby.IsValid())
+                    {
+                        // TODO: Look if thats really JoinLobby ?
+                        // I saw on steamdev that overlay sends a GameLobbyJoinRequested_t
+                        //GameLobbyJoinRequested_t data;
+                        //data.m_steamIDLobby.SetFromUint64(friend_info->second.lobbyId);
+                        //data.m_steamIDFriend.SetFromUint64(friend_id);
+                        //callbacks->addCBResult(data.k_iCallback, &data, sizeof(data));
+                        steamMatchmaking->JoinLobby(friend_game_info.m_steamIDLobby);
+                    }
+                }
+
+                friend_info->second.window_state &= ~window_state_join;
+            }
+            // The user got a lobby invite and accepted it
+            if (friend_info->second.window_state & window_state_lobby_invite)
+            {
+                GameLobbyJoinRequested_t data;
+                data.m_steamIDLobby.SetFromUint64(friend_info->second.lobbyId);
+                data.m_steamIDFriend.SetFromUint64(friend_id);
+                callbacks->addCBResult(data.k_iCallback, &data, sizeof(data));
+
+                friend_info->second.window_state &= ~window_state_lobby_invite;
+            }
+            // The user got a rich presence invite and accepted it
+            if (friend_info->second.window_state & window_state_rich_invite)
+            {
+                GameRichPresenceJoinRequested_t data = {};
+                data.m_steamIDFriend.SetFromUint64(friend_id);
+                strncpy(data.m_rgchConnect, friend_info->second.connect, k_cchMaxRichPresenceValueLength - 1);
+                callbacks->addCBResult(data.k_iCallback, &data, sizeof(data));
+
+                friend_info->second.window_state &= ~window_state_rich_invite;
+            }
+        }
+        has_friend_action.pop();
+    }
+}
+
+#endif

overlay_experimental/steam_overlay.h

@@ -0,0 +1,194 @@
+#ifndef __INCLUDED_STEAM_OVERLAY_H__
+#define __INCLUDED_STEAM_OVERLAY_H__
+
+#include "../dll/base.h"
+#include <map>
+#include <queue>
+
+static constexpr size_t max_chat_len = 768;
+
+enum window_state
+{
+    window_state_none           = 0,
+    window_state_show           = 1<<0,
+    window_state_invite         = 1<<1,
+    window_state_join           = 1<<2,
+    window_state_lobby_invite   = 1<<3,
+    window_state_rich_invite    = 1<<4,
+    window_state_send_message   = 1<<5,
+    window_state_need_attention = 1<<6,
+};
+
+struct friend_window_state
+{
+    int id;
+    uint8 window_state;
+    std::string window_title;
+    union // The invitation (if any)
+    {
+        uint64 lobbyId;
+        char connect[k_cchMaxRichPresenceValueLength];
+    };
+    std::string chat_history;
+    char chat_input[max_chat_len];
+};
+
+struct Friend_Less
+{
+    bool operator()(const Friend& lhs, const Friend& rhs) const
+    {
+        return lhs.id() < rhs.id();
+    }
+};
+
+enum notification_type
+{
+    notification_type_message = 0,
+    notification_type_invite,
+    notification_type_achievement,
+};
+
+struct Notification
+{
+    static constexpr float width = 0.25;
+    static constexpr float height = 5.0;
+    static constexpr std::chrono::milliseconds fade_in   = std::chrono::milliseconds(2000);
+    static constexpr std::chrono::milliseconds fade_out  = std::chrono::milliseconds(2000);
+    static constexpr std::chrono::milliseconds show_time = std::chrono::milliseconds(6000) + fade_in + fade_out;
+    static constexpr std::chrono::milliseconds fade_out_start = show_time - fade_out;
+    static constexpr float r = 0.16;
+    static constexpr float g = 0.29;
+    static constexpr float b = 0.48;
+    static constexpr float max_alpha = 0.5f;
+
+    int id;
+    uint8 type;
+    std::chrono::seconds start_time;
+    std::string message;
+    std::pair<const Friend, friend_window_state>* frd;
+};
+
+#ifndef NO_OVERLAY
+
+class Steam_Overlay
+{
+    Settings* settings;
+    SteamCallResults* callback_results;
+    SteamCallBacks* callbacks;
+    RunEveryRunCB* run_every_runcb;
+    Networking* network;
+
+    // friend id, show client window (to chat and accept invite maybe)
+    std::map<Friend, friend_window_state, Friend_Less> friends;
+
+    bool setup_overlay_called;
+    bool is_ready;
+    bool show_overlay;
+    ENotificationPosition notif_position;
+    int h_inset, v_inset;
+
+    // Callback infos
+    std::queue<Friend> has_friend_action;
+    std::vector<Notification> notifications;
+    bool overlay_state_changed;
+
+    Steam_Overlay(Steam_Overlay const&) = delete;
+    Steam_Overlay(Steam_Overlay&&) = delete;
+    Steam_Overlay& operator=(Steam_Overlay const&) = delete;
+    Steam_Overlay& operator=(Steam_Overlay&&) = delete;
+
+    static void steam_overlay_run_every_runcb(void* object);
+    static void steam_overlay_callback(void* object, Common_Message* msg);
+
+    void Callback(Common_Message* msg);
+    void RunCallbacks();
+
+    bool FriendHasLobby(uint64 friend_id);
+    bool IHaveLobby();
+
+    void NotifyUser(friend_window_state& friend_state);
+
+    // Right click on friend
+    void BuildContextMenu(Friend const& frd, friend_window_state &state);
+    // Double click on friend
+    void BuildFriendWindow(Friend const& frd, friend_window_state &state);
+    // Notifications like achievements, chat and invitations
+    void BuildNotifications(int width, int height);
+public:
+    Steam_Overlay(Settings* settings, SteamCallResults* callback_results, SteamCallBacks* callbacks, RunEveryRunCB* run_every_runcb, Networking *network);
+
+    ~Steam_Overlay();
+
+    bool Ready() const;
+
+    bool NeedPresent() const;
+
+    void SetNotificationPosition(ENotificationPosition eNotificationPosition);
+
+    void SetNotificationInset(int nHorizontalInset, int nVerticalInset);
+    void SetupOverlay();
+
+    void HookReady();
+
+    void CreateFonts();
+    void OverlayProc();
+
+    void OpenOverlayInvite(CSteamID lobbyId);
+    void OpenOverlay(const char* pchDialog);
+
+    bool ShowOverlay() const;
+    void ShowOverlay(bool state);
+
+    void SetLobbyInvite(Friend friendId, uint64 lobbyId);
+    void SetRichInvite(Friend friendId, const char* connect_str);
+
+    void FriendConnect(Friend _friend);
+    void FriendDisconnect(Friend _friend);
+
+    void AddMessageNotification(std::string const& message);
+    void AddAchievementNotification(nlohmann::json const& ach);
+    void AddInviteNotification(std::pair<const Friend, friend_window_state> &wnd_state);
+};
+
+#else
+
+class Steam_Overlay
+{
+public:
+    Steam_Overlay(Settings* settings, SteamCallResults* callback_results, SteamCallBacks* callbacks, RunEveryRunCB* run_every_runcb, Networking* network) {}
+    ~Steam_Overlay() {}
+
+    bool Ready() const { return false; }
+
+    bool NeedPresent() const { return false; }
+
+    void SetNotificationPosition(ENotificationPosition eNotificationPosition) {}
+
+    void SetNotificationInset(int nHorizontalInset, int nVerticalInset) {}
+    void SetupOverlay() {}
+
+    void HookReady() {}
+
+    void CreateFonts() {}
+    void OverlayProc() {}
+
+    void OpenOverlayInvite(CSteamID lobbyId) {}
+    void OpenOverlay(const char* pchDialog) {}
+
+    bool ShowOverlay() const {}
+    void ShowOverlay(bool state) {}
+
+    void SetLobbyInvite(Friend friendId, uint64 lobbyId) {}
+    void SetRichInvite(Friend friendId, const char* connect_str) {}
+
+    void FriendConnect(Friend _friend) {}
+    void FriendDisconnect(Friend _friend) {}
+
+    void AddMessageNotification(std::string const& message) {}
+    void AddAchievementNotification(nlohmann::json const& ach) {}
+    void AddInviteNotification(std::pair<const Friend, friend_window_state> &wnd_state) {}
+};
+
+#endif
+
+#endif//__INCLUDED_STEAM_OVERLAY_H__

overlay_experimental/windows/DX10_Hook.cpp

@@ -0,0 +1,172 @@
+#include "DX10_Hook.h"
+#include "Windows_Hook.h"
+#include "../Renderer_Detector.h"
+#include "../../dll/dll.h"
+
+#ifndef NO_OVERLAY
+
+#include <imgui.h>
+#include <impls/windows/imgui_impl_dx10.h>
+
+DX10_Hook* DX10_Hook::_inst = nullptr;
+
+bool DX10_Hook::start_hook()
+{
+    bool res = true;
+    if (!hooked)
+    {
+        if (!Windows_Hook::Inst()->start_hook())
+            return false;
+
+        PRINT_DEBUG("Hooked DirectX 10\n");
+        hooked = true;
+
+        Renderer_Detector::Inst().renderer_found(this);
+
+        BeginHook();
+        HookFuncs(
+            std::make_pair<void**, void*>(&(PVOID&)DX10_Hook::Present, &DX10_Hook::MyPresent),
+            std::make_pair<void**, void*>(&(PVOID&)DX10_Hook::ResizeTarget, &DX10_Hook::MyResizeTarget),
+            std::make_pair<void**, void*>(&(PVOID&)DX10_Hook::ResizeBuffers, &DX10_Hook::MyResizeBuffers)
+        );
+        EndHook();
+
+        get_steam_client()->steam_overlay->HookReady();
+    }
+    return res;
+}
+
+void DX10_Hook::resetRenderState()
+{
+    if (initialized)
+    {
+        mainRenderTargetView->Release();
+
+        ImGui_ImplDX10_Shutdown();
+        Windows_Hook::Inst()->resetRenderState();
+        ImGui::DestroyContext();
+
+        initialized = false;
+    }
+}
+
+// Try to make this function and overlay's proc as short as possible or it might affect game's fps.
+void DX10_Hook::prepareForOverlay(IDXGISwapChain* pSwapChain)
+{
+    DXGI_SWAP_CHAIN_DESC desc;
+    pSwapChain->GetDesc(&desc);
+
+    if (!initialized)
+    {
+        if (FAILED(pSwapChain->GetDevice(IID_PPV_ARGS(&pDevice))))
+            return;
+
+        ImGui::CreateContext();
+        ImGuiIO& io = ImGui::GetIO();
+        io.IniFilename = NULL;
+
+        ID3D10Texture2D* pBackBuffer;
+
+        pSwapChain->GetBuffer(0, IID_PPV_ARGS(&pBackBuffer));
+        pDevice->CreateRenderTargetView(pBackBuffer, NULL, &mainRenderTargetView);
+        pBackBuffer->Release();
+
+        ImGui_ImplDX10_Init(pDevice);
+
+        pDevice->Release();
+
+        get_steam_client()->steam_overlay->CreateFonts();
+
+        initialized = true;
+    }
+
+    if (ImGui_ImplDX10_NewFrame())
+    {
+        Windows_Hook::Inst()->prepareForOverlay(desc.OutputWindow);
+
+        ImGui::NewFrame();
+
+        get_steam_client()->steam_overlay->OverlayProc();
+
+        ImGui::Render();
+
+        pDevice->OMSetRenderTargets(1, &mainRenderTargetView, NULL);
+        ImGui_ImplDX10_RenderDrawData(ImGui::GetDrawData());
+    }
+}
+
+HRESULT STDMETHODCALLTYPE DX10_Hook::MyPresent(IDXGISwapChain *_this, UINT SyncInterval, UINT Flags)
+{
+    DX10_Hook::Inst()->prepareForOverlay(_this);
+    return (_this->*DX10_Hook::Inst()->Present)(SyncInterval, Flags);
+}
+
+HRESULT STDMETHODCALLTYPE DX10_Hook::MyResizeTarget(IDXGISwapChain* _this, const DXGI_MODE_DESC* pNewTargetParameters)
+{
+    DX10_Hook::Inst()->resetRenderState();
+    return (_this->*DX10_Hook::Inst()->ResizeTarget)(pNewTargetParameters);
+}
+
+HRESULT STDMETHODCALLTYPE DX10_Hook::MyResizeBuffers(IDXGISwapChain* _this, UINT BufferCount, UINT Width, UINT Height, DXGI_FORMAT NewFormat, UINT SwapChainFlags)
+{
+    DX10_Hook::Inst()->resetRenderState();
+    return (_this->*DX10_Hook::Inst()->ResizeBuffers)(BufferCount, Width, Height, NewFormat, SwapChainFlags);
+}
+
+DX10_Hook::DX10_Hook():
+    initialized(false),
+    hooked(false),
+    pDevice(nullptr),
+    mainRenderTargetView(nullptr),
+    Present(nullptr),
+    ResizeBuffers(nullptr),
+    ResizeTarget(nullptr)
+{
+    _library = LoadLibrary(DLL_NAME);
+}
+
+DX10_Hook::~DX10_Hook()
+{
+    PRINT_DEBUG("DX10 Hook removed\n");
+
+    if (initialized)
+    {
+        mainRenderTargetView->Release();
+
+        ImGui_ImplDX10_InvalidateDeviceObjects();
+        ImGui::DestroyContext();
+
+        initialized = false;
+    }
+
+    FreeLibrary(reinterpret_cast<HMODULE>(_library));
+
+    _inst = nullptr;
+}
+
+DX10_Hook* DX10_Hook::Inst()
+{
+    if (_inst == nullptr)   
+        _inst = new DX10_Hook;
+
+    return _inst;
+}
+
+const char* DX10_Hook::get_lib_name() const
+{
+    return DLL_NAME;
+}
+
+void DX10_Hook::loadFunctions(IDXGISwapChain *pSwapChain)
+{
+    void** vTable;
+
+    vTable = *reinterpret_cast<void***>(pSwapChain);
+#define LOAD_FUNC(X) (void*&)X = vTable[(int)IDXGISwapChainVTable::X]
+    LOAD_FUNC(Present);
+    LOAD_FUNC(ResizeBuffers);
+    LOAD_FUNC(ResizeTarget);
+#undef LOAD_FUNC
+}
+
+#endif//NO_OVERLAY

overlay_experimental/windows/DX10_Hook.h

@@ -0,0 +1,51 @@
+#ifndef __INCLUDED_DX10_HOOK_H__
+#define __INCLUDED_DX10_HOOK_H__
+
+#include "../Base_Hook.h"
+#ifndef NO_OVERLAY
+
+#include <d3d10.h>
+#include "DirectX_VTables.h"
+
+class DX10_Hook : public Base_Hook
+{
+public:
+    static constexpr const char *DLL_NAME = "d3d10.dll";
+
+private:
+    static DX10_Hook* _inst;
+
+    // Variables
+    bool hooked;
+    bool initialized;
+    ID3D10Device* pDevice;
+    ID3D10RenderTargetView* mainRenderTargetView;
+
+    // Functions
+    DX10_Hook();
+
+    void resetRenderState();
+    void prepareForOverlay(IDXGISwapChain *pSwapChain);
+
+    // Hook to render functions
+    static HRESULT STDMETHODCALLTYPE MyPresent(IDXGISwapChain* _this, UINT SyncInterval, UINT Flags);
+    static HRESULT STDMETHODCALLTYPE MyResizeTarget(IDXGISwapChain* _this, const DXGI_MODE_DESC* pNewTargetParameters);
+    static HRESULT STDMETHODCALLTYPE MyResizeBuffers(IDXGISwapChain* _this, UINT BufferCount, UINT Width, UINT Height, DXGI_FORMAT NewFormat, UINT SwapChainFlags);
+
+    decltype(&IDXGISwapChain::Present)       Present;
+    decltype(&IDXGISwapChain::ResizeBuffers) ResizeBuffers;
+    decltype(&IDXGISwapChain::ResizeTarget)  ResizeTarget;
+
+public:
+    virtual ~DX10_Hook();
+
+    bool start_hook();
+    static DX10_Hook* Inst();
+    virtual const char* get_lib_name() const;
+
+    void loadFunctions(IDXGISwapChain *pSwapChain);
+};
+
+#endif//NO_OVERLAY
+
+#endif//__INCLUDED_DX10_HOOK_H__

overlay_experimental/windows/DX11_Hook.cpp

@@ -0,0 +1,186 @@
+#include "DX11_Hook.h"
+#include "Windows_Hook.h"
+#include "../Renderer_Detector.h"
+#include "../../dll/dll.h"
+
+#ifndef NO_OVERLAY
+
+#include <imgui.h>
+#include <impls/windows/imgui_impl_dx11.h>
+
+DX11_Hook* DX11_Hook::_inst = nullptr;
+
+HRESULT GetDeviceAndCtxFromSwapchain(IDXGISwapChain* pSwapChain, ID3D11Device** ppDevice, ID3D11DeviceContext** ppContext)
+{
+    HRESULT ret = pSwapChain->GetDevice(IID_PPV_ARGS(ppDevice));
+
+    if (SUCCEEDED(ret))
+        (*ppDevice)->GetImmediateContext(ppContext);
+
+    return ret;
+}
+
+bool DX11_Hook::start_hook()
+{
+    bool res = true;
+    if (!hooked)
+    {
+        if (!Windows_Hook::Inst()->start_hook())
+            return false;
+
+        PRINT_DEBUG("Hooked DirectX 11\n");
+        hooked = true;
+
+        Renderer_Detector::Inst().renderer_found(this);
+
+        BeginHook();
+        HookFuncs(
+            std::make_pair<void**, void*>(&(PVOID&)DX11_Hook::Present, &DX11_Hook::MyPresent),
+            std::make_pair<void**, void*>(&(PVOID&)DX11_Hook::ResizeTarget, &DX11_Hook::MyResizeTarget),
+            std::make_pair<void**, void*>(&(PVOID&)DX11_Hook::ResizeBuffers, &DX11_Hook::MyResizeBuffers)
+        );
+        EndHook();
+
+        get_steam_client()->steam_overlay->HookReady();
+    }
+    return res;
+}
+
+void DX11_Hook::resetRenderState()
+{
+    if (initialized)
+    {
+        mainRenderTargetView->Release();
+        pContext->Release();
+
+        ImGui_ImplDX11_Shutdown();
+        Windows_Hook::Inst()->resetRenderState();
+        ImGui::DestroyContext();
+
+        initialized = false;
+    }
+}
+
+// Try to make this function and overlay's proc as short as possible or it might affect game's fps.
+void DX11_Hook::prepareForOverlay(IDXGISwapChain* pSwapChain)
+{
+    DXGI_SWAP_CHAIN_DESC desc;
+    pSwapChain->GetDesc(&desc);
+
+    if (!initialized)
+    {
+        ID3D11Device* pDevice = nullptr;
+        if (FAILED(GetDeviceAndCtxFromSwapchain(pSwapChain, &pDevice, &pContext)))
+            return;
+
+        ImGui::CreateContext();
+        ImGuiIO& io = ImGui::GetIO();
+        io.IniFilename = NULL;
+
+        ID3D11Texture2D* pBackBuffer;
+
+        pSwapChain->GetBuffer(0, IID_PPV_ARGS(&pBackBuffer));
+        pDevice->CreateRenderTargetView(pBackBuffer, NULL, &mainRenderTargetView);
+        pBackBuffer->Release();
+
+        ImGui_ImplDX11_Init(pDevice, pContext);
+
+        pDevice->Release();
+
+        get_steam_client()->steam_overlay->CreateFonts();
+
+        initialized = true;
+    }
+
+    if (ImGui_ImplDX11_NewFrame())
+    {
+        Windows_Hook::Inst()->prepareForOverlay(desc.OutputWindow);
+
+        ImGui::NewFrame();
+
+        get_steam_client()->steam_overlay->OverlayProc();
+
+        ImGui::Render();
+
+        pContext->OMSetRenderTargets(1, &mainRenderTargetView, NULL);
+        ImGui_ImplDX11_RenderDrawData(ImGui::GetDrawData());
+    }
+}
+
+HRESULT STDMETHODCALLTYPE DX11_Hook::MyPresent(IDXGISwapChain *_this, UINT SyncInterval, UINT Flags)
+{
+    DX11_Hook::Inst()->prepareForOverlay(_this);
+
+    return (_this->*DX11_Hook::Inst()->Present)(SyncInterval, Flags);
+}
+
+HRESULT STDMETHODCALLTYPE DX11_Hook::MyResizeTarget(IDXGISwapChain* _this, const DXGI_MODE_DESC* pNewTargetParameters)
+{
+    DX11_Hook::Inst()->resetRenderState();
+    return (_this->*DX11_Hook::Inst()->ResizeTarget)(pNewTargetParameters);
+}
+
+HRESULT STDMETHODCALLTYPE DX11_Hook::MyResizeBuffers(IDXGISwapChain* _this, UINT BufferCount, UINT Width, UINT Height, DXGI_FORMAT NewFormat, UINT SwapChainFlags)
+{
+    DX11_Hook::Inst()->resetRenderState();
+    return (_this->*DX11_Hook::Inst()->ResizeBuffers)(BufferCount, Width, Height, NewFormat, SwapChainFlags);
+}
+
+DX11_Hook::DX11_Hook():
+    initialized(false),
+    hooked(false),
+    pContext(nullptr),
+    mainRenderTargetView(nullptr),
+    Present(nullptr),
+    ResizeBuffers(nullptr),
+    ResizeTarget(nullptr)
+{
+    _library = LoadLibrary(DLL_NAME);
+}
+
+DX11_Hook::~DX11_Hook()
+{
+    PRINT_DEBUG("DX11 Hook removed\n");
+
+    if (initialized)
+    {
+        mainRenderTargetView->Release();
+        pContext->Release();
+
+        ImGui_ImplDX11_InvalidateDeviceObjects();
+        ImGui::DestroyContext();
+
+        initialized = false;
+    }
+
+    FreeLibrary(reinterpret_cast<HMODULE>(_library));
+
+    _inst = nullptr;
+}
+
+DX11_Hook* DX11_Hook::Inst()
+{
+    if (_inst == nullptr)
+        _inst = new DX11_Hook;
+
+    return _inst;
+}
+
+const char* DX11_Hook::get_lib_name() const
+{
+    return DLL_NAME;
+}
+
+void DX11_Hook::loadFunctions(IDXGISwapChain *pSwapChain)
+{
+    void** vTable;
+
+    vTable = *reinterpret_cast<void***>(pSwapChain);
+#define LOAD_FUNC(X) (void*&)X = vTable[(int)IDXGISwapChainVTable::X]
+    LOAD_FUNC(Present);
+    LOAD_FUNC(ResizeBuffers);
+    LOAD_FUNC(ResizeTarget);
+#undef LOAD_FUNC
+}
+
+#endif//NO_OVERLAY

overlay_experimental/windows/DX11_Hook.h

@@ -0,0 +1,51 @@
+#ifndef __INCLUDED_DX11_HOOK_H__
+#define __INCLUDED_DX11_HOOK_H__
+
+#include "../Base_Hook.h"
+#ifndef NO_OVERLAY
+
+#include <d3d11.h>
+#include "DirectX_VTables.h"
+
+class DX11_Hook : public Base_Hook
+{
+public:
+    static constexpr const char *DLL_NAME = "d3d11.dll";
+
+private:
+    static DX11_Hook* _inst;
+
+    // Variables
+    bool hooked;
+    bool initialized;
+    ID3D11DeviceContext* pContext;
+    ID3D11RenderTargetView* mainRenderTargetView;
+
+    // Functions
+    DX11_Hook();
+
+    void resetRenderState();
+    void prepareForOverlay(IDXGISwapChain* pSwapChain);
+
+    // Hook to render functions
+    static HRESULT STDMETHODCALLTYPE MyPresent(IDXGISwapChain* _this, UINT SyncInterval, UINT Flags);
+    static HRESULT STDMETHODCALLTYPE MyResizeTarget(IDXGISwapChain* _this, const DXGI_MODE_DESC* pNewTargetParameters);
+    static HRESULT STDMETHODCALLTYPE MyResizeBuffers(IDXGISwapChain* _this, UINT BufferCount, UINT Width, UINT Height, DXGI_FORMAT NewFormat, UINT SwapChainFlags);
+
+    decltype(&IDXGISwapChain::Present)       Present;
+    decltype(&IDXGISwapChain::ResizeBuffers) ResizeBuffers;
+    decltype(&IDXGISwapChain::ResizeTarget)  ResizeTarget;
+
+public:
+    virtual ~DX11_Hook();
+
+    bool start_hook();
+    static DX11_Hook* Inst();
+    virtual const char* get_lib_name() const;
+
+    void loadFunctions(IDXGISwapChain *pSwapChain);
+};
+
+#endif//NO_OVERLAY
+
+#endif//__INCLUDED_DX11_HOOK_H__

overlay_experimental/windows/DX12_Hook.cpp

@@ -0,0 +1,319 @@
+#include "DX12_Hook.h"
+#include "Windows_Hook.h"
+#include "../Renderer_Detector.h"
+#include "../../dll/dll.h"
+
+#ifndef NO_OVERLAY
+
+#include <imgui.h>
+#include <impls/windows/imgui_impl_dx12.h>
+
+#include <dxgi1_4.h>
+
+DX12_Hook* DX12_Hook::_inst = nullptr;
+
+bool DX12_Hook::start_hook()
+{
+    bool res = true;
+    if (!hooked)
+    {
+        if (!Windows_Hook::Inst()->start_hook())
+            return false;
+
+        PRINT_DEBUG("Hooked DirectX 12\n");
+        hooked = true;
+
+        Renderer_Detector::Inst().renderer_found(this);
+
+        BeginHook();
+        HookFuncs(
+            std::make_pair<void**, void*>(&(PVOID&)DX12_Hook::Present, &DX12_Hook::MyPresent),
+            std::make_pair<void**, void*>(&(PVOID&)DX12_Hook::ResizeTarget, &DX12_Hook::MyResizeTarget),
+            std::make_pair<void**, void*>(&(PVOID&)DX12_Hook::ResizeBuffers, &DX12_Hook::MyResizeBuffers),
+            std::make_pair<void**, void*>(&(PVOID&)DX12_Hook::ExecuteCommandLists, &DX12_Hook::MyExecuteCommandLists)
+        );
+        EndHook();
+
+        get_steam_client()->steam_overlay->HookReady();
+    }
+    return res;
+}
+
+void DX12_Hook::resetRenderState()
+{
+    if (initialized)
+    {
+        pSrvDescHeap->Release();
+        for (UINT i = 0; i < bufferCount; ++i)
+        {
+            pCmdAlloc[i]->Release();
+            pBackBuffer[i]->Release();
+        }
+        pRtvDescHeap->Release();
+        delete[]pCmdAlloc;
+        delete[]pBackBuffer;
+
+        ImGui_ImplDX12_Shutdown();
+        Windows_Hook::Inst()->resetRenderState();
+        ImGui::DestroyContext();
+
+        initialized = false;
+    }
+}
+
+// Try to make this function and overlay's proc as short as possible or it might affect game's fps.
+void DX12_Hook::prepareForOverlay(IDXGISwapChain* pSwapChain)
+{
+    if (pCmdQueue == nullptr)
+        return;
+
+    ID3D12CommandQueue* pCmdQueue = this->pCmdQueue;
+
+    IDXGISwapChain3* pSwapChain3 = nullptr;
+    DXGI_SWAP_CHAIN_DESC sc_desc;
+    pSwapChain->QueryInterface(IID_PPV_ARGS(&pSwapChain3));
+    if (pSwapChain3 == nullptr)
+        return;
+
+    pSwapChain3->GetDesc(&sc_desc);
+
+    if (!initialized)
+    {
+        UINT bufferIndex = pSwapChain3->GetCurrentBackBufferIndex();
+        ID3D12Device* pDevice;
+        if (pSwapChain3->GetDevice(IID_PPV_ARGS(&pDevice)) != S_OK)
+            return;
+
+        bufferCount = sc_desc.BufferCount;
+
+        mainRenderTargets.clear();
+
+        {
+            D3D12_DESCRIPTOR_HEAP_DESC desc = {};
+            desc.Type = D3D12_DESCRIPTOR_HEAP_TYPE_CBV_SRV_UAV;
+            desc.NumDescriptors = 1;
+            desc.Flags = D3D12_DESCRIPTOR_HEAP_FLAG_SHADER_VISIBLE;
+            if (pDevice->CreateDescriptorHeap(&desc, IID_PPV_ARGS(&pSrvDescHeap)) != S_OK)
+            {
+                pDevice->Release();
+                pSwapChain3->Release();
+                return;
+            }
+        }
+        {
+            D3D12_DESCRIPTOR_HEAP_DESC desc = {};
+            desc.Type = D3D12_DESCRIPTOR_HEAP_TYPE_RTV;
+            desc.NumDescriptors = bufferCount;
+            desc.Flags = D3D12_DESCRIPTOR_HEAP_FLAG_NONE;
+            desc.NodeMask = 1;
+            if (pDevice->CreateDescriptorHeap(&desc, IID_PPV_ARGS(&pRtvDescHeap)) != S_OK)
+            {
+                pDevice->Release();
+                pSwapChain3->Release();
+                pSrvDescHeap->Release();
+                return;
+            }
+        
+            SIZE_T rtvDescriptorSize = pDevice->GetDescriptorHandleIncrementSize(D3D12_DESCRIPTOR_HEAP_TYPE_RTV);
+            D3D12_CPU_DESCRIPTOR_HANDLE rtvHandle = pRtvDescHeap->GetCPUDescriptorHandleForHeapStart();
+            pCmdAlloc = new ID3D12CommandAllocator * [bufferCount];
+            for (int i = 0; i < bufferCount; ++i)
+            {
+                mainRenderTargets.push_back(rtvHandle);
+                rtvHandle.ptr += rtvDescriptorSize;
+            }
+        }
+        
+        for (UINT i = 0; i < sc_desc.BufferCount; ++i)
+        {
+            if (pDevice->CreateCommandAllocator(D3D12_COMMAND_LIST_TYPE_DIRECT, IID_PPV_ARGS(&pCmdAlloc[i])) != S_OK)
+            {
+                pDevice->Release();
+                pSwapChain3->Release();
+                pSrvDescHeap->Release();
+                for (UINT j = 0; j < i; ++j)
+                {
+                    pCmdAlloc[j]->Release();
+                }
+                pRtvDescHeap->Release();
+                delete[]pCmdAlloc;
+                return;
+            }
+        }
+
+        if (pDevice->CreateCommandList(0, D3D12_COMMAND_LIST_TYPE_DIRECT, pCmdAlloc[0], NULL, IID_PPV_ARGS(&pCmdList)) != S_OK ||
+            pCmdList->Close() != S_OK)
+        {
+            pDevice->Release();
+            pSwapChain3->Release();
+            pSrvDescHeap->Release();
+            for (UINT i = 0; i < bufferCount; ++i)
+                pCmdAlloc[i]->Release();
+            pRtvDescHeap->Release();
+            delete[]pCmdAlloc;
+            return;
+        }
+
+        pBackBuffer = new ID3D12Resource * [bufferCount];
+        for (UINT i = 0; i < bufferCount; i++)
+        {
+            pSwapChain3->GetBuffer(i, IID_PPV_ARGS(&pBackBuffer[i]));
+            pDevice->CreateRenderTargetView(pBackBuffer[i], NULL, mainRenderTargets[i]);
+        }
+
+        ImGui::CreateContext();
+        ImGuiIO& io = ImGui::GetIO();
+        io.IniFilename = NULL;
+    
+        ImGui_ImplDX12_Init(pDevice, bufferCount, DXGI_FORMAT_R8G8B8A8_UNORM,
+            pSrvDescHeap->GetCPUDescriptorHandleForHeapStart(),
+            pSrvDescHeap->GetGPUDescriptorHandleForHeapStart());
+        
+        get_steam_client()->steam_overlay->CreateFonts();
+
+        initialized = true;
+
+        pDevice->Release();
+    }
+    
+    if (ImGui_ImplDX12_NewFrame())
+    {
+        Windows_Hook::Inst()->prepareForOverlay(sc_desc.OutputWindow);
+
+        ImGui::NewFrame();
+
+        get_steam_client()->steam_overlay->OverlayProc();
+
+        UINT bufferIndex = pSwapChain3->GetCurrentBackBufferIndex();
+
+        D3D12_RESOURCE_BARRIER barrier = {};
+        barrier.Type = D3D12_RESOURCE_BARRIER_TYPE_TRANSITION;
+        barrier.Flags = D3D12_RESOURCE_BARRIER_FLAG_NONE;
+        barrier.Transition.pResource = pBackBuffer[bufferIndex];
+        barrier.Transition.Subresource = D3D12_RESOURCE_BARRIER_ALL_SUBRESOURCES;
+        barrier.Transition.StateBefore = D3D12_RESOURCE_STATE_PRESENT;
+        barrier.Transition.StateAfter = D3D12_RESOURCE_STATE_RENDER_TARGET;
+
+        pCmdAlloc[bufferIndex]->Reset();
+        pCmdList->Reset(pCmdAlloc[bufferIndex], NULL);
+        pCmdList->ResourceBarrier(1, &barrier);
+        pCmdList->OMSetRenderTargets(1, &mainRenderTargets[bufferIndex], FALSE, NULL);
+        pCmdList->SetDescriptorHeaps(1, &pSrvDescHeap);
+
+        ImGui::Render();
+        ImGui_ImplDX12_RenderDrawData(ImGui::GetDrawData(), pCmdList);
+
+        barrier.Transition.StateBefore = D3D12_RESOURCE_STATE_RENDER_TARGET;
+        barrier.Transition.StateAfter = D3D12_RESOURCE_STATE_PRESENT;
+        pCmdList->ResourceBarrier(1, &barrier);
+        pCmdList->Close();
+
+        pCmdQueue->ExecuteCommandLists(1, (ID3D12CommandList**)&pCmdList);
+    }
+    pSwapChain3->Release();
+}
+
+HRESULT STDMETHODCALLTYPE DX12_Hook::MyPresent(IDXGISwapChain *_this, UINT SyncInterval, UINT Flags)
+{
+    DX12_Hook::Inst()->prepareForOverlay(_this);
+
+    return (_this->*DX12_Hook::Inst()->Present)(SyncInterval, Flags);
+}
+
+HRESULT STDMETHODCALLTYPE DX12_Hook::MyResizeTarget(IDXGISwapChain* _this, const DXGI_MODE_DESC* pNewTargetParameters)
+{
+    DX12_Hook::Inst()->resetRenderState();
+    return (_this->*DX12_Hook::Inst()->ResizeTarget)(pNewTargetParameters);
+}
+
+HRESULT STDMETHODCALLTYPE DX12_Hook::MyResizeBuffers(IDXGISwapChain* _this, UINT BufferCount, UINT Width, UINT Height, DXGI_FORMAT NewFormat, UINT SwapChainFlags)
+{
+    DX12_Hook::Inst()->resetRenderState();
+    return (_this->*DX12_Hook::Inst()->ResizeBuffers)(BufferCount, Width, Height, NewFormat, SwapChainFlags);
+}
+
+void STDMETHODCALLTYPE DX12_Hook::MyExecuteCommandLists(ID3D12CommandQueue *_this, UINT NumCommandLists, ID3D12CommandList* const* ppCommandLists)
+{
+    DX12_Hook* me = DX12_Hook::Inst();
+    me->pCmdQueue = _this;
+
+    (_this->*DX12_Hook::Inst()->ExecuteCommandLists)(NumCommandLists, ppCommandLists);
+}
+
+DX12_Hook::DX12_Hook():
+    initialized(false),
+    pCmdQueue(nullptr),
+    bufferCount(0),
+    pCmdAlloc(nullptr),
+    pSrvDescHeap(nullptr),
+    pCmdList(nullptr),
+    pRtvDescHeap(nullptr),
+    hooked(false),
+    Present(nullptr),
+    ResizeBuffers(nullptr),
+    ResizeTarget(nullptr),
+    ExecuteCommandLists(nullptr)
+{
+    _library = LoadLibrary(DLL_NAME);
+
+    PRINT_DEBUG("DX12 support is experimental, don't complain if it doesn't work as expected.\n");
+}
+
+DX12_Hook::~DX12_Hook()
+{
+    PRINT_DEBUG("DX12 Hook removed\n");
+
+    if (initialized)
+    {
+        pSrvDescHeap->Release();
+        for (UINT i = 0; i < bufferCount; ++i)
+        {
+            pCmdAlloc[i]->Release();
+            pBackBuffer[i]->Release();
+        }
+        pRtvDescHeap->Release();
+        delete[]pCmdAlloc;
+        delete[]pBackBuffer;
+
+        ImGui_ImplDX12_InvalidateDeviceObjects();
+        ImGui::DestroyContext();
+
+        initialized = false;
+    }
+
+    FreeLibrary(reinterpret_cast<HMODULE>(_library));
+
+    _inst = nullptr;
+}
+
+DX12_Hook* DX12_Hook::Inst()
+{
+    if (_inst == nullptr)
+        _inst = new DX12_Hook();
+
+    return _inst;
+}
+
+const char* DX12_Hook::get_lib_name() const
+{
+    return DLL_NAME;
+}
+
+void DX12_Hook::loadFunctions(ID3D12CommandQueue* pCommandQueue, IDXGISwapChain *pSwapChain)
+{
+    void** vTable;
+    
+    vTable = *reinterpret_cast<void***>(pCommandQueue);
+#define LOAD_FUNC(X) (void*&)X = vTable[(int)ID3D12CommandQueueVTable::X]
+    LOAD_FUNC(ExecuteCommandLists);
+#undef LOAD_FUNC
+
+    vTable = *reinterpret_cast<void***>(pSwapChain);
+#define LOAD_FUNC(X) (void*&)X = vTable[(int)IDXGISwapChainVTable::X]
+    LOAD_FUNC(Present);
+    LOAD_FUNC(ResizeBuffers);
+    LOAD_FUNC(ResizeTarget);
+#undef LOAD_FUNC
+}
+
+#endif//NO_OVERLAY

overlay_experimental/windows/DX12_Hook.h

@@ -0,0 +1,60 @@
+#ifndef __INCLUDED_DX12_HOOK_H__
+#define __INCLUDED_DX12_HOOK_H__
+
+#include "../Base_Hook.h"
+#ifndef NO_OVERLAY
+
+#include <d3d12.h>
+#include <dxgi1_4.h>
+#include "DirectX_VTables.h"
+
+class DX12_Hook : public Base_Hook
+{
+public:
+    static constexpr const char *DLL_NAME = "d3d12.dll";
+
+private:
+    static DX12_Hook* _inst;
+
+    // Variables
+    bool hooked;
+    bool initialized;
+
+    ID3D12CommandQueue* pCmdQueue;
+    UINT bufferCount;
+    std::vector<D3D12_CPU_DESCRIPTOR_HANDLE> mainRenderTargets;
+    ID3D12CommandAllocator** pCmdAlloc;
+    ID3D12DescriptorHeap* pSrvDescHeap;
+    ID3D12GraphicsCommandList* pCmdList;
+    ID3D12DescriptorHeap* pRtvDescHeap;
+    ID3D12Resource** pBackBuffer;
+
+    // Functions
+    DX12_Hook();
+
+    void resetRenderState();
+    void prepareForOverlay(IDXGISwapChain* pSwapChain);
+
+    // Hook to render functions
+    static HRESULT STDMETHODCALLTYPE MyPresent(IDXGISwapChain* _this, UINT SyncInterval, UINT Flags);
+    static HRESULT STDMETHODCALLTYPE MyResizeTarget(IDXGISwapChain* _this, const DXGI_MODE_DESC* pNewTargetParameters);
+    static HRESULT STDMETHODCALLTYPE MyResizeBuffers(IDXGISwapChain* _this, UINT BufferCount, UINT Width, UINT Height, DXGI_FORMAT NewFormat, UINT SwapChainFlags);
+    static void STDMETHODCALLTYPE MyExecuteCommandLists(ID3D12CommandQueue *_this, UINT NumCommandLists, ID3D12CommandList* const* ppCommandLists);
+
+    decltype(&IDXGISwapChain::Present)       Present;
+    decltype(&IDXGISwapChain::ResizeBuffers) ResizeBuffers;
+    decltype(&IDXGISwapChain::ResizeTarget)  ResizeTarget;
+    decltype(&ID3D12CommandQueue::ExecuteCommandLists) ExecuteCommandLists;
+
+public:
+    virtual ~DX12_Hook();
+
+    bool start_hook();
+    static DX12_Hook* Inst();
+    virtual const char* get_lib_name() const;
+
+    void loadFunctions(ID3D12CommandQueue* pCommandQueue, IDXGISwapChain* pSwapChain);
+};
+
+#endif//NO_OVERLAY
+#endif//__INCLUDED_DX12_HOOK_H__

overlay_experimental/windows/DX9_Hook.cpp

@@ -0,0 +1,172 @@
+#include "DX9_Hook.h"
+#include "Windows_Hook.h"
+#include "../Renderer_Detector.h"
+#include "../../dll/dll.h"
+
+#ifndef NO_OVERLAY
+
+#include <imgui.h>
+#include <impls/windows/imgui_impl_dx9.h>
+
+DX9_Hook* DX9_Hook::_inst = nullptr;
+
+bool DX9_Hook::start_hook()
+{
+    if (!hooked)
+    {
+        if (!Windows_Hook::Inst()->start_hook())
+            return false;
+
+        PRINT_DEBUG("Hooked DirectX 9\n");
+        hooked = true;
+        
+        Renderer_Detector::Inst().renderer_found(this);
+
+        BeginHook();
+        HookFuncs(
+            std::make_pair<void**, void*>(&(PVOID&)Reset, &DX9_Hook::MyReset),
+            std::make_pair<void**, void*>(&(PVOID&)Present, &DX9_Hook::MyPresent)
+        );
+        if (PresentEx != nullptr)
+        {
+            HookFuncs(
+                std::make_pair<void**, void*>(&(PVOID&)PresentEx, &DX9_Hook::MyPresentEx)
+                //std::make_pair<void**, void*>(&(PVOID&)EndScene, &DX9_Hook::MyEndScene)
+            );
+        }
+        EndHook();
+
+        get_steam_client()->steam_overlay->HookReady();
+    }
+    return true;
+}
+
+void DX9_Hook::resetRenderState()
+{
+    if (initialized)
+    {
+        initialized = false;
+        ImGui_ImplDX9_Shutdown();
+        Windows_Hook::Inst()->resetRenderState();
+        ImGui::DestroyContext();
+    }
+}
+
+// Try to make this function and overlay's proc as short as possible or it might affect game's fps.
+void DX9_Hook::prepareForOverlay(IDirect3DDevice9 *pDevice)
+{
+    D3DDEVICE_CREATION_PARAMETERS param;
+    pDevice->GetCreationParameters(&param);
+
+    // Workaround to detect if we changed window.
+    if (param.hFocusWindow != Windows_Hook::Inst()->GetGameHwnd())
+        resetRenderState();
+
+    if (!initialized)
+    {
+        ImGui::CreateContext();
+        ImGuiIO& io = ImGui::GetIO();
+        io.IniFilename = NULL;
+
+        ImGui_ImplDX9_Init(pDevice);
+
+        get_steam_client()->steam_overlay->CreateFonts();
+
+        initialized = true;
+    }
+    
+    if (ImGui_ImplDX9_NewFrame())
+    {
+        Windows_Hook::Inst()->prepareForOverlay(param.hFocusWindow);
+
+        ImGui::NewFrame();
+
+        get_steam_client()->steam_overlay->OverlayProc();
+
+        ImGui::Render();
+
+        ImGui_ImplDX9_RenderDrawData(ImGui::GetDrawData());
+    }
+}
+
+HRESULT STDMETHODCALLTYPE DX9_Hook::MyReset(IDirect3DDevice9* _this, D3DPRESENT_PARAMETERS* pPresentationParameters)
+{
+    DX9_Hook::Inst()->resetRenderState();
+    return (_this->*DX9_Hook::Inst()->Reset)(pPresentationParameters);
+}
+
+HRESULT STDMETHODCALLTYPE DX9_Hook::MyEndScene(IDirect3DDevice9* _this)
+{   
+    if( !DX9_Hook::Inst()->uses_present )
+        DX9_Hook::Inst()->prepareForOverlay(_this);
+    return (_this->*DX9_Hook::Inst()->EndScene)();
+}
+
+HRESULT STDMETHODCALLTYPE DX9_Hook::MyPresent(IDirect3DDevice9* _this, CONST RECT* pSourceRect, CONST RECT* pDestRect, HWND hDestWindowOverride, CONST RGNDATA* pDirtyRegion)
+{
+    DX9_Hook::Inst()->uses_present = true;
+    DX9_Hook::Inst()->prepareForOverlay(_this);
+    return (_this->*DX9_Hook::Inst()->Present)(pSourceRect, pDestRect, hDestWindowOverride, pDirtyRegion);
+}
+
+HRESULT STDMETHODCALLTYPE DX9_Hook::MyPresentEx(IDirect3DDevice9Ex* _this, CONST RECT* pSourceRect, CONST RECT* pDestRect, HWND hDestWindowOverride, CONST RGNDATA* pDirtyRegion, DWORD dwFlags)
+{
+    DX9_Hook::Inst()->uses_present = true;
+    DX9_Hook::Inst()->prepareForOverlay(_this);
+    return (_this->*DX9_Hook::Inst()->PresentEx)(pSourceRect, pDestRect, hDestWindowOverride, pDirtyRegion, dwFlags);
+}
+
+DX9_Hook::DX9_Hook():
+    initialized(false),
+    hooked(false),
+    uses_present(false),
+    EndScene(nullptr),
+    Present(nullptr),
+    PresentEx(nullptr),
+    Reset(nullptr)
+{
+    _library = LoadLibrary(DLL_NAME);
+}
+
+DX9_Hook::~DX9_Hook()
+{
+    PRINT_DEBUG("DX9 Hook removed\n");
+
+    if (initialized)
+    {
+        ImGui_ImplDX9_InvalidateDeviceObjects();
+        ImGui::DestroyContext();
+    }
+
+    FreeLibrary(reinterpret_cast<HMODULE>(_library));
+
+    _inst = nullptr;
+}
+
+DX9_Hook* DX9_Hook::Inst()
+{
+    if( _inst == nullptr )
+        _inst = new DX9_Hook;
+
+    return _inst;
+}
+
+const char* DX9_Hook::get_lib_name() const
+{
+    return DLL_NAME;
+}
+
+void DX9_Hook::loadFunctions(IDirect3DDevice9* pDevice, bool ex)
+{
+    void** vTable = *reinterpret_cast<void***>(pDevice);
+
+#define LOAD_FUNC(X) (void*&)X = vTable[(int)IDirect3DDevice9VTable::X]
+    LOAD_FUNC(Reset);
+    LOAD_FUNC(EndScene);
+    LOAD_FUNC(Present);
+    if (ex)
+        LOAD_FUNC(PresentEx);
+#undef LOAD_FUNC
+}
+
+#endif//NO_OVERLAY

overlay_experimental/windows/DX9_Hook.h

@@ -0,0 +1,52 @@
+#ifndef __INCLUDED_DX9_HOOK_H__
+#define __INCLUDED_DX9_HOOK_H__
+
+#include "../Base_Hook.h"
+#ifndef NO_OVERLAY
+
+#include <d3d9.h>
+#include "DirectX_VTables.h"
+
+class DX9_Hook : public Base_Hook
+{
+public:
+    static constexpr const char *DLL_NAME = "d3d9.dll";
+
+private:
+    static DX9_Hook* _inst;
+
+    // Variables
+    bool hooked;
+    bool initialized;
+    bool uses_present;
+
+    // Functions
+    DX9_Hook();
+
+    void resetRenderState();
+    void prepareForOverlay(IDirect3DDevice9* pDevice);
+
+    // Hook to render functions
+    decltype(&IDirect3DDevice9::Reset)       Reset;
+    decltype(&IDirect3DDevice9::EndScene)    EndScene;
+    decltype(&IDirect3DDevice9::Present)     Present;
+    decltype(&IDirect3DDevice9Ex::PresentEx) PresentEx;
+
+    static HRESULT STDMETHODCALLTYPE MyReset(IDirect3DDevice9* _this, D3DPRESENT_PARAMETERS* pPresentationParameters);
+    static HRESULT STDMETHODCALLTYPE MyEndScene(IDirect3DDevice9 *_this);
+    static HRESULT STDMETHODCALLTYPE MyPresent(IDirect3DDevice9* _this, CONST RECT* pSourceRect, CONST RECT* pDestRect, HWND hDestWindowOverride, CONST RGNDATA* pDirtyRegion);
+    static HRESULT STDMETHODCALLTYPE MyPresentEx(IDirect3DDevice9Ex* _this, CONST RECT* pSourceRect, CONST RECT* pDestRect, HWND hDestWindowOverride, CONST RGNDATA* pDirtyRegion, DWORD dwFlags);
+
+public:
+    virtual ~DX9_Hook();
+
+    bool start_hook();
+    static DX9_Hook* Inst();
+    virtual const char* get_lib_name() const;
+
+    void loadFunctions(IDirect3DDevice9 *pDevice, bool ex);
+};
+
+#endif//NO_OVERLAY
+
+#endif//__INCLUDED_DX9_HOOK_H__

overlay_experimental/windows/DirectX_VTables.h

@@ -0,0 +1,448 @@
+#pragma once
+
+#include <DXGI.h>
+
+enum class IDXGISwapChainVTable
+{
+    // IUnknown
+    QueryInterface,
+    AddRef,
+    Release,
+
+    // IDXGIObject
+    SetPrivateData,
+    SetPrivateDataInterface,
+    GetPrivateData,
+    GetParent,
+
+    // IDXGIDeviceSubObject
+    GetDevice,
+
+    // IDXGISwapChain
+    Present,
+    GetBuffer,
+    SetFullscreenState,
+    GetFullscreenState,
+    GetDesc,
+    ResizeBuffers,
+    ResizeTarget,
+    GetContainingOutput,
+    GetFrameStatistics,
+    GetLastPresentCount,
+
+    // IDXGISwapChain1
+    GetDesc1,
+    GetFullscreenDesc,
+    GetHwnd,
+    GetCoreWindow,
+    Present1,
+    IsTemporaryMonoSupported,
+    GetRestrictToOutput,
+    SetBackgroundColor,
+    GetBackgroundColor,
+    SetRotation,
+    GetRotation,
+};
+
+enum class ID3D12CommandQueueVTable
+{
+    // IUnknown
+    QueryInterface,
+    AddRef,
+    Release,
+
+    // ID3D12Object
+    GetPrivateData,
+    SetPrivateData,
+    SetPrivateDataInterface,
+    SetName,
+
+    // ID3D12DeviceChild
+    GetDevice,
+
+    // ID3D12Pageable
+
+    // ID3D12CommandQueue
+    UpdateTileMappings,
+    CopyTileMappings,
+    ExecuteCommandLists,
+    SetMarker,
+    BeginEvent,
+    EndEvent,
+    Signal,
+    Wait,
+    GetTimestampFrequency,
+    GetClockCalibration,
+    GetDesc,
+};
+
+enum class ID3D12GraphicsCommandListVTable
+{
+    // IUnknown
+    QueryInterface,
+    AddRef,
+    Release,
+
+    // ID3D12Object
+    GetPrivateData,
+    SetPrivateData,
+    SetPrivateDataInterface,
+    SetName,
+
+    // ID3D12DeviceChild
+    GetDevice,
+
+    // ID3D12CommandList
+    GetType,
+
+    // ID3D12GraphicsCommandList
+    Close,
+    Reset,
+    ClearState,
+    DrawInstanced,
+    DrawIndexedInstanced,
+    Dispatch,
+    CopyBufferRegion,
+    CopyTextureRegion,
+    CopyResource,
+    CopyTiles,
+    ResolveSubresource,
+    IASetPrimitiveTopology,
+    RSSetViewports,
+    RSSetScissorRects,
+    OMSetBlendFactor,
+    OMSetStencilRef,
+    SetPipelineState,
+    ResourceBarrier,
+    ExecuteBundle,
+    SetDescriptorHeaps,
+    SetComputeRootSignature,
+    SetGraphicsRootSignature,
+    SetComputeRootDescriptorTable,
+    SetGraphicsRootDescriptorTable,
+    SetComputeRoot32BitConstant,
+    SetGraphicsRoot32BitConstant,
+    SetComputeRoot32BitConstants,
+    SetGraphicsRoot32BitConstants,
+    SetComputeRootConstantBufferView,
+    SetGraphicsRootConstantBufferView,
+    SetComputeRootShaderResourceView,
+    SetGraphicsRootShaderResourceView,
+    SetComputeRootUnorderedAccessView,
+    SetGraphicsRootUnorderedAccessView,
+    IASetIndexBuffer,
+    IASetVertexBuffers,
+    SOSetTargets,
+    OMSetRenderTargets,
+    ClearDepthStencilView,
+    ClearRenderTargetView,
+    ClearUnorderedAccessViewUint,
+    ClearUnorderedAccessViewFloat,
+    DiscardResource,
+    BeginQuery,
+    EndQuery,
+    ResolveQueryData,
+    SetPredication,
+    SetMarker,
+    BeginEvent,
+    EndEvent,
+    ExecuteIndirect,
+};
+
+enum class ID3D11DeviceVTable
+{
+    // IUnknown
+    QueryInterface,
+    AddRef,
+    Release,
+
+    // ID3D11Device
+    CreateBuffer,
+    CreateTexture1D,
+    CreateTexture2D,
+    CreateTexture3D,
+    CreateShaderResourceView,
+    CreateUnorderedAccessView,
+    CreateRenderTargetView,
+    CreateDepthStencilView,
+    CreateInputLayout,
+    CreateVertexShader,
+    CreateGeometryShader,
+    CreateGeometryShaderWithStreamOutput,
+    CreatePixelShader,
+    CreateHullShader,
+    CreateDomainShader,
+    CreateComputeShader,
+    CreateClassLinkage,
+    CreateBlendState,
+    CreateDepthStencilState,
+    CreateRasterizerState,
+    CreateSamplerState,
+    CreateQuery,
+    CreatePredicate,
+    CreateCounter,
+    CreateDeferredContext,
+    OpenSharedResource,
+    CheckFormatSupport,
+    CheckMultisampleQualityLevels,
+    CheckCounterInfo,
+    CheckCounter,
+    CheckFeatureSupport,
+    GetPrivateData,
+    SetPrivateData,
+    SetPrivateDataInterface,
+    GetFeatureLevel,
+    GetCreationFlags,
+    GetDeviceRemovedReason,
+    GetImmediateContext,
+    SetExceptionMode,
+    GetExceptionMode,
+};
+
+enum class ID3D10DeviceVTable
+{
+    // IUnknown
+    QueryInterface,
+    AddRef,
+    Release,
+
+    // ID3D10Device
+    VSSetConstantBuffers,
+    PSSetShaderResources,
+    PSSetShader,
+    PSSetSamplers,
+    VSSetShader,
+    DrawIndexed,
+    Draw,
+    PSSetConstantBuffers,
+    IASetInputLayout,
+    IASetVertexBuffers,
+    IASetIndexBuffer,
+    DrawIndexedInstanced,
+    DrawInstanced,
+    GSSetConstantBuffers,
+    GSSetShader,
+    IASetPrimitiveTopology,
+    VSSetShaderResources,
+    VSSetSamplers,
+    SetPredication,
+    GSSetShaderResources,
+    GSSetSamplers,
+    OMSetRenderTargets,
+    OMSetBlendState,
+    OMSetDepthStencilState,
+    SOSetTargets,
+    DrawAuto,
+    RSSetState,
+    RSSetViewports,
+    RSSetScissorRects,
+    CopySubresourceRegion,
+    CopyResource,
+    UpdateSubresource,
+    ClearRenderTargetView,
+    ClearDepthStencilView,
+    GenerateMips,
+    ResolveSubresource,
+    VSGetConstantBuffers,
+    PSGetShaderResources,
+    PSGetShader,
+    PSGetSamplers,
+    VSGetShader,
+    PSGetConstantBuffers,
+    IAGetInputLayout,
+    IAGetVertexBuffers,
+    IAGetIndexBuffer,
+    GSGetConstantBuffers,
+    GSGetShader,
+    IAGetPrimitiveTopology,
+    VSGetShaderResources,
+    VSGetSamplers,
+    GetPredication,
+    GSGetShaderResources,
+    GSGetSamplers,
+    OMGetRenderTargets,
+    OMGetBlendState,
+    OMGetDepthStencilState,
+    SOGetTargets,
+    RSGetState,
+    RSGetViewports,
+    RSGetScissorRects,
+    GetDeviceRemovedReason,
+    SetExceptionMode,
+    GetExceptionMode,
+    GetPrivateData,
+    SetPrivateData,
+    SetPrivateDataInterface,
+    ClearState,
+    Flush,
+    CreateBuffer,
+    CreateTexture1D,
+    CreateTexture2D,
+    CreateTexture3D,
+    CreateShaderResourceView,
+    CreateRenderTargetView,
+    CreateDepthStencilView,
+    CreateInputLayout,
+    CreateVertexShader,
+    CreateGeometryShader,
+    CreateGeometryShaderWithStreamOutput,
+    CreatePixelShader,
+    CreateBlendState,
+    CreateDepthStencilState,
+    CreateRasterizerState,
+    CreateSamplerState,
+    CreateQuery,
+    CreatePredicate,
+    CreateCounter,
+    CheckFormatSupport,
+    CheckMultisampleQualityLevels,
+    CheckCounterInfo,
+    CheckCounter,
+    GetCreationFlags,
+    OpenSharedResource,
+    SetTextFilterSize,
+    GetTextFilterSize,
+};
+
+enum class IDirect3DDevice9VTable
+{
+    // IUnknown
+    QueryInterface,
+    AddRef,
+    Release,
+
+    // IDirect3DDevice9
+    TestCooperativeLevel,
+    GetAvailableTextureMem,
+    EvictManagedResources,
+    GetDirect3D,
+    GetDeviceCaps,
+    GetDisplayMode,
+    GetCreationParameters,
+    SetCursorProperties,
+    SetCursorPosition,
+    ShowCursor,
+    CreateAdditionalSwapChain,
+    GetSwapChain,
+    GetNumberOfSwapChains,
+    Reset,
+    Present,
+    GetBackBuffer,
+    GetRasterStatus,
+    SetDialogBoxMode,
+    SetGammaRamp,
+    GetGammaRamp,
+    CreateTexture,
+    CreateVolumeTexture,
+    CreateCubeTexture,
+    CreateVertexBuffer,
+    CreateIndexBuffer,
+    CreateRenderTarget,
+    CreateDepthStencilSurface,
+    UpdateSurface,
+    UpdateTexture,
+    GetRenderTargetData,
+    GetFrontBufferData,
+    StretchRect,
+    ColorFill,
+    CreateOffscreenPlainSurface,
+    SetRenderTarget,
+    GetRenderTarget,
+    SetDepthStencilSurface,
+    GetDepthStencilSurface,
+    BeginScene,
+    EndScene,
+    Clear,
+    SetTransform,
+    GetTransform,
+    MultiplyTransform,
+    SetViewport,
+    GetViewport,
+    SetMaterial,
+    GetMaterial,
+    SetLight,
+    GetLight,
+    LightEnable,
+    GetLightEnable,
+    SetClipPlane,
+    GetClipPlane,
+    SetRenderState,
+    GetRenderState,
+    CreateStateBlock,
+    BeginStateBlock,
+    EndStateBlock,
+    SetClipStatus,
+    GetClipStatus,
+    GetTexture,
+    SetTexture,
+    GetTextureStageState,
+    SetTextureStageState,
+    GetSamplerState,
+    SetSamplerState,
+    ValidateDevice,
+    SetPaletteEntries,
+    GetPaletteEntries,
+    SetCurrentTexturePalette,
+    GetCurrentTexturePalette,
+    SetScissorRect,
+    GetScissorRect,
+    SetSoftwareVertexProcessing,
+    GetSoftwareVertexProcessing,
+    SetNPatchMode,
+    GetNPatchMode,
+    DrawPrimitive,
+    DrawIndexedPrimitive,
+    DrawPrimitiveUP,
+    DrawIndexedPrimitiveUP,
+    ProcessVertices,
+    CreateVertexDeclaration,
+    SetVertexDeclaration,
+    GetVertexDeclaration,
+    SetFVF,
+    GetFVF,
+    CreateVertexShader,
+    SetVertexShader,
+    GetVertexShader,
+    SetVertexShaderConstantF,
+    GetVertexShaderConstantF,
+    SetVertexShaderConstantI,
+    GetVertexShaderConstantI,
+    SetVertexShaderConstantB,
+    GetVertexShaderConstantB,
+    SetStreamSource,
+    GetStreamSource,
+    SetStreamSourceFreq,
+    GetStreamSourceFreq,
+    SetIndices,
+    GetIndices,
+    CreatePixelShader,
+    SetPixelShader,
+    GetPixelShader,
+    SetPixelShaderConstantF,
+    GetPixelShaderConstantF,
+    SetPixelShaderConstantI,
+    GetPixelShaderConstantI,
+    SetPixelShaderConstantB,
+    GetPixelShaderConstantB,
+    DrawRectPatch,
+    DrawTriPatch,
+    DeletePatch,
+    CreateQuery,
+
+    // IDirect3DDevice9Ex
+    SetConvolutionMonoKernel,
+    ComposeRects,
+    PresentEx,
+    GetGPUThreadPriority,
+    SetGPUThreadPriority,
+    WaitForVBlank,
+    CheckResourceResidency,
+    SetMaximumFrameLatency,
+    GetMaximumFrameLatency,
+    CheckDeviceState,
+    CreateRenderTargetEx,
+    CreateOffscreenPlainSurfaceEx,
+    CreateDepthStencilSurfaceEx,
+    ResetEx,
+    GetDisplayModeEx,
+};

overlay_experimental/windows/ImGui_ShaderBlobs.h

@@ -0,0 +1,81 @@
+#ifndef __IMGUI_SHADER_BLOBS_INCLUDED__
+#define __IMGUI_SHADER_BLOBS_INCLUDED__
+
+// Defining this will use d3dcompiler and it will be a dependence of the dll.
+//#define USE_D3DCOMPILE
+
+#ifdef USE_D3DCOMPILE
+    #include <d3dcompiler.h>
+  //#ifdef _MSC_VER
+  //  #pragma comment(lib, "d3dcompiler") // Automatically link with d3dcompiler.lib as we are using D3DCompile() below.
+  //#endif
+
+    decltype(D3DCompile)* load_d3dcompile();
+    void unload_d3dcompile();
+#else
+
+#define ImGui_vertexShaderDX10_len 876
+extern unsigned char ImGui_vertexShaderDX10[ImGui_vertexShaderDX10_len];
+
+#define ImGui_vertexShaderDX11_len 1104
+extern unsigned char ImGui_vertexShaderDX11[ImGui_vertexShaderDX11_len];
+
+#define ImGui_vertexShaderDX11_9_1_len 1104
+extern unsigned char ImGui_vertexShaderDX11_9_1[ImGui_vertexShaderDX11_9_1_len];
+
+#define ImGui_vertexShaderDX11_9_2_len ImGui_vertexShaderDX11_9_1_len
+#define ImGui_vertexShaderDX11_9_2 ImGui_vertexShaderDX11_9_1
+
+#define ImGui_vertexShaderDX11_9_3_len 1104
+extern unsigned char ImGui_vertexShaderDX11_9_3[ImGui_vertexShaderDX11_9_3_len];
+
+#define ImGui_vertexShaderDX11_10_0_len 876
+extern unsigned char ImGui_vertexShaderDX11_10_0[ImGui_vertexShaderDX11_10_0_len];
+
+#define ImGui_vertexShaderDX11_10_1_len 880
+extern unsigned char ImGui_vertexShaderDX11_10_1[ImGui_vertexShaderDX11_10_1_len];
+
+#define ImGui_vertexShaderDX11_11_0_len 988
+extern unsigned char ImGui_vertexShaderDX11_11_0[ImGui_vertexShaderDX11_11_0_len];
+
+#define ImGui_vertexShaderDX11_11_1_len 988
+extern unsigned char ImGui_vertexShaderDX11_11_1[ImGui_vertexShaderDX11_11_1_len];
+
+#define ImGui_vertexShaderDX12_len 988
+extern unsigned char ImGui_vertexShaderDX12[ImGui_vertexShaderDX12_len];
+
+
+
+#define ImGui_pixelShaderDX10_len 660
+extern unsigned char ImGui_pixelShaderDX10[ImGui_pixelShaderDX10_len];
+
+#define ImGui_pixelShaderDX11_len 1104
+extern unsigned char ImGui_pixelShaderDX11[ImGui_pixelShaderDX11_len];
+
+#define ImGui_pixelShaderDX11_9_1_len 800
+extern unsigned char ImGui_pixelShaderDX11_9_1[ImGui_pixelShaderDX11_9_1_len];
+
+#define ImGui_pixelShaderDX11_9_2_len ImGui_pixelShaderDX11_9_1_len
+#define ImGui_pixelShaderDX11_9_2 ImGui_pixelShaderDX11_9_1
+
+#define ImGui_pixelShaderDX11_9_3_len 800
+extern unsigned char ImGui_pixelShaderDX11_9_3[ImGui_pixelShaderDX11_9_3_len];
+
+#define ImGui_pixelShaderDX11_10_0_len 660
+extern unsigned char ImGui_pixelShaderDX11_10_0[ImGui_pixelShaderDX11_10_0_len];
+
+#define ImGui_pixelShaderDX11_10_1_len 664
+extern unsigned char ImGui_pixelShaderDX11_10_1[ImGui_pixelShaderDX11_10_1_len];
+
+#define ImGui_pixelShaderDX11_11_0_len 736
+extern unsigned char ImGui_pixelShaderDX11_11_0[ImGui_pixelShaderDX11_11_0_len];
+
+#define ImGui_pixelShaderDX11_11_1_len 736
+extern unsigned char ImGui_pixelShaderDX11_11_1[ImGui_pixelShaderDX11_11_1_len];
+
+#define ImGui_pixelShaderDX12_len 736
+extern unsigned char ImGui_pixelShaderDX12[ImGui_pixelShaderDX12_len];
+
+#endif
+
+#endif//__IMGUI_SHADER_BLOBS_INCLUDED__

overlay_experimental/windows/OpenGL_Hook.cpp

@@ -0,0 +1,147 @@
+#include "OpenGL_Hook.h"
+#include "Windows_Hook.h"
+#include "../Renderer_Detector.h"
+#include "../../dll/dll.h"
+
+#ifndef NO_OVERLAY
+
+#include <imgui.h>
+#include <impls/imgui_impl_opengl3.h>
+
+#include <GL/glew.h>
+
+#include "../steam_overlay.h"
+
+OpenGL_Hook* OpenGL_Hook::_inst = nullptr;
+
+bool OpenGL_Hook::start_hook()
+{
+    bool res = true;
+    if (!hooked)
+    {
+        if (!Windows_Hook::Inst()->start_hook())
+            return false;
+
+        GLenum err = glewInit();
+
+        if (err == GLEW_OK)
+        {
+            PRINT_DEBUG("Hooked OpenGL\n");
+
+            hooked = true;
+            Renderer_Detector::Inst().renderer_found(this);
+
+            UnhookAll();
+            BeginHook();
+            HookFuncs(
+                std::make_pair<void**, void*>(&(PVOID&)wglSwapBuffers, &OpenGL_Hook::MywglSwapBuffers)
+            );
+            EndHook();
+
+            get_steam_client()->steam_overlay->HookReady();
+        }
+        else
+        {
+            PRINT_DEBUG("Failed to hook OpenGL\n");
+            /* Problem: glewInit failed, something is seriously wrong. */
+            PRINT_DEBUG("Error: %s\n", glewGetErrorString(err));
+            res = false;
+        }
+    }
+    return true;
+}
+
+void OpenGL_Hook::resetRenderState()
+{
+    if (initialized)
+    {
+        ImGui_ImplOpenGL3_Shutdown();
+        Windows_Hook::Inst()->resetRenderState();
+        ImGui::DestroyContext();
+
+        initialized = false;
+    }
+}
+
+// Try to make this function and overlay's proc as short as possible or it might affect game's fps.
+void OpenGL_Hook::prepareForOverlay(HDC hDC)
+{
+    HWND hWnd = WindowFromDC(hDC);
+
+    if (hWnd != Windows_Hook::Inst()->GetGameHwnd())
+        resetRenderState();
+
+    if (!initialized)
+    {
+        ImGui::CreateContext();
+        ImGuiIO& io = ImGui::GetIO();
+        io.IniFilename = NULL;
+
+        ImGui_ImplOpenGL3_Init();
+
+        get_steam_client()->steam_overlay->CreateFonts();
+
+        initialized = true;
+    }
+    if (ImGui_ImplOpenGL3_NewFrame())
+    {
+        Windows_Hook::Inst()->prepareForOverlay(hWnd);
+
+        ImGui::NewFrame();
+
+        get_steam_client()->steam_overlay->OverlayProc();
+
+        ImGui::Render();
+
+        ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
+    }
+}
+
+BOOL WINAPI OpenGL_Hook::MywglSwapBuffers(HDC hDC)
+{
+    OpenGL_Hook::Inst()->prepareForOverlay(hDC);
+    return OpenGL_Hook::Inst()->wglSwapBuffers(hDC);
+}
+
+OpenGL_Hook::OpenGL_Hook():
+    initialized(false),
+    hooked(false),
+    wglSwapBuffers(nullptr)
+{
+    _library = LoadLibrary(DLL_NAME);
+}
+
+OpenGL_Hook::~OpenGL_Hook()
+{
+    PRINT_DEBUG("OpenGL Hook removed\n");
+
+    if (initialized)
+    {
+        ImGui_ImplOpenGL3_Shutdown();
+        ImGui::DestroyContext();
+    }
+
+    FreeLibrary(reinterpret_cast<HMODULE>(_library));
+
+    _inst = nullptr;
+}
+
+OpenGL_Hook* OpenGL_Hook::Inst()
+{
+    if (_inst == nullptr)
+        _inst = new OpenGL_Hook;
+
+    return _inst;
+}
+
+const char* OpenGL_Hook::get_lib_name() const
+{
+    return DLL_NAME;
+}
+
+void OpenGL_Hook::loadFunctions(wglSwapBuffers_t pfnwglSwapBuffers)
+{
+    wglSwapBuffers = pfnwglSwapBuffers;
+}
+
+#endif//NO_OVERLAY

overlay_experimental/windows/OpenGL_Hook.h

@@ -0,0 +1,42 @@
+#ifndef __INCLUDED_OPENGL_HOOK_H__
+#define __INCLUDED_OPENGL_HOOK_H__
+
+#include "../Base_Hook.h"
+#ifndef NO_OVERLAY
+
+class OpenGL_Hook : public Base_Hook
+{
+public:
+    static constexpr const char *DLL_NAME = "opengl32.dll";
+
+    using wglSwapBuffers_t = BOOL(WINAPI*)(HDC);
+
+private:
+    static OpenGL_Hook* _inst;
+
+    // Variables
+    bool hooked;
+    bool initialized;
+
+    // Functions
+    OpenGL_Hook();
+
+    void resetRenderState();
+    void prepareForOverlay(HDC hDC);
+
+    // Hook to render functions
+    static BOOL WINAPI MywglSwapBuffers(HDC hDC);
+
+    wglSwapBuffers_t wglSwapBuffers;
+
+public:
+    virtual ~OpenGL_Hook();
+
+    bool start_hook();
+    static OpenGL_Hook* Inst();
+    virtual const char* get_lib_name() const;
+    void loadFunctions(wglSwapBuffers_t pfnwglSwapBuffers);
+};
+
+#endif//NO_OVERLAY
+#endif//__INCLUDED_OPENGL_HOOK_H__

overlay_experimental/windows/Windows_Hook.cpp

@@ -0,0 +1,209 @@
+#include "Windows_Hook.h"
+#include "../Renderer_Detector.h"
+#include "../../dll/dll.h"
+
+#ifndef NO_OVERLAY
+
+#include <imgui.h>
+#include <impls/windows/imgui_impl_win32.h>
+
+extern LRESULT ImGui_ImplWin32_WndProcHandler(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam);
+
+Windows_Hook* Windows_Hook::_inst = nullptr;
+
+bool Windows_Hook::start_hook()
+{
+    bool res = true;
+    if (!hooked)
+    {
+        GetRawInputBuffer = ::GetRawInputBuffer;
+        GetRawInputData = ::GetRawInputData;
+
+        PRINT_DEBUG("Hooked Windows\n");
+
+        BeginHook();
+        HookFuncs(
+            std::make_pair<void**, void*>(&(PVOID&)GetRawInputBuffer, &Windows_Hook::MyGetRawInputBuffer),
+            std::make_pair<void**, void*>(&(PVOID&)GetRawInputData  , &Windows_Hook::MyGetRawInputData)
+        );
+        EndHook();
+
+        hooked = true;
+    }
+    return res;
+}
+
+void Windows_Hook::resetRenderState()
+{
+    if (initialized)
+    {
+        initialized = false;
+        SetWindowLongPtr(_game_hwnd, GWLP_WNDPROC, (LONG_PTR)_game_wndproc);
+        _game_hwnd = nullptr;
+        _game_wndproc = nullptr;
+        ImGui_ImplWin32_Shutdown();
+    }
+}
+
+void Windows_Hook::prepareForOverlay(HWND hWnd)
+{
+    if (!initialized)
+    {
+        ImGui_ImplWin32_Init(hWnd);
+
+        _game_hwnd = hWnd;
+        _game_wndproc = (WNDPROC)SetWindowLongPtr(hWnd, GWLP_WNDPROC, (LONG_PTR)&Windows_Hook::HookWndProc);
+
+        initialized = true;
+    }
+
+    ImGui_ImplWin32_NewFrame();
+}
+
+HWND Windows_Hook::GetGameHwnd() const
+{
+    return _game_hwnd;
+}
+
+WNDPROC Windows_Hook::GetGameWndProc() const
+{
+    return _game_wndproc;
+}
+
+/////////////////////////////////////////////////////////////////////////////////////
+// Windows window hooks
+bool IgnoreMsg(UINT uMsg)
+{
+    switch (uMsg)
+    {
+        // Mouse Events
+        case WM_MOUSEMOVE:
+        case WM_MOUSEWHEEL: case WM_MOUSEHWHEEL:
+        case WM_LBUTTONUP: case WM_LBUTTONDOWN: case WM_LBUTTONDBLCLK:
+        case WM_RBUTTONUP: case WM_RBUTTONDOWN: case WM_RBUTTONDBLCLK:
+        case WM_MBUTTONUP: case WM_MBUTTONDOWN: case WM_MBUTTONDBLCLK:
+        case WM_XBUTTONUP: case WM_XBUTTONDOWN: case WM_XBUTTONDBLCLK:
+        case WM_MOUSEACTIVATE: case WM_MOUSEHOVER: case WM_MOUSELEAVE:
+        // Keyboard Events
+        case WM_KEYDOWN: case WM_KEYUP:
+        case WM_SYSKEYDOWN: case WM_SYSKEYUP: case WM_SYSDEADCHAR:
+        case WM_CHAR: case WM_UNICHAR: case WM_DEADCHAR:
+        // Raw Input Events
+        case WM_INPUT:
+            return true;
+    }
+    return false;
+}
+
+void RawMouseEvent(RAWINPUT& raw)
+{
+    if (raw.header.dwType == RIM_TYPEMOUSE)
+    {
+        if (raw.data.mouse.usButtonFlags & RI_MOUSE_LEFT_BUTTON_DOWN)
+            ImGui_ImplWin32_WndProcHandler(Windows_Hook::Inst()->GetGameHwnd(), WM_LBUTTONDOWN, 0, 0);
+        else if (raw.data.mouse.usButtonFlags & RI_MOUSE_LEFT_BUTTON_UP)
+            ImGui_ImplWin32_WndProcHandler(Windows_Hook::Inst()->GetGameHwnd(), WM_LBUTTONUP, 0, 0);
+        else if (raw.data.mouse.usButtonFlags & RI_MOUSE_MIDDLE_BUTTON_DOWN)
+            ImGui_ImplWin32_WndProcHandler(Windows_Hook::Inst()->GetGameHwnd(), WM_MBUTTONDOWN, 0, 0);
+        else if (raw.data.mouse.usButtonFlags & RI_MOUSE_MIDDLE_BUTTON_UP)
+            ImGui_ImplWin32_WndProcHandler(Windows_Hook::Inst()->GetGameHwnd(), WM_MBUTTONUP, 0, 0);
+        else if (raw.data.mouse.usButtonFlags & RI_MOUSE_RIGHT_BUTTON_DOWN)
+            ImGui_ImplWin32_WndProcHandler(Windows_Hook::Inst()->GetGameHwnd(), WM_RBUTTONDOWN, 0, 0);
+        else if (raw.data.mouse.usButtonFlags & RI_MOUSE_RIGHT_BUTTON_UP)
+            ImGui_ImplWin32_WndProcHandler(Windows_Hook::Inst()->GetGameHwnd(), WM_RBUTTONUP, 0, 0);
+    }
+}
+
+LRESULT CALLBACK Windows_Hook::HookWndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
+{
+    Steam_Overlay* overlay = get_steam_client()->steam_overlay;
+    bool show = overlay->ShowOverlay();
+    // Is the event is a key press
+    if (uMsg == WM_KEYDOWN)
+    {
+        // Tab is pressed and was not pressed before
+        if (wParam == VK_TAB && !(lParam & (1 << 30)))
+        {
+            // If Left Shift is pressed
+            if (GetAsyncKeyState(VK_LSHIFT) & (1 << 15))
+            {
+                show = !overlay->ShowOverlay();
+                overlay->ShowOverlay(show);
+            }
+        }
+    }
+
+    ImGui_ImplWin32_WndProcHandler(hWnd, uMsg, wParam, lParam);
+    if (show)
+    {
+        if (IgnoreMsg(uMsg))
+            return 0;
+    }
+
+    // Call the overlay window procedure
+    return CallWindowProc(Windows_Hook::Inst()->_game_wndproc, hWnd, uMsg, wParam, lParam);
+}
+
+UINT WINAPI Windows_Hook::MyGetRawInputBuffer(PRAWINPUT pData, PUINT pcbSize, UINT cbSizeHeader)
+{
+    if (pData == nullptr || !get_steam_client()->steam_overlay->ShowOverlay())
+        return Windows_Hook::Inst()->GetRawInputBuffer(pData, pcbSize, cbSizeHeader);
+
+    int num = Windows_Hook::Inst()->GetRawInputBuffer(pData, pcbSize, cbSizeHeader);
+    for (int i = 0; i < num; ++i)
+        RawMouseEvent(pData[i]);
+
+    return 0;
+}
+
+UINT WINAPI Windows_Hook::MyGetRawInputData(HRAWINPUT hRawInput, UINT uiCommand, LPVOID pData, PUINT pcbSize, UINT cbSizeHeader)
+{
+    if (pData == nullptr || !get_steam_client()->steam_overlay->ShowOverlay())
+        return Windows_Hook::Inst()->GetRawInputData(hRawInput, uiCommand, pData, pcbSize, cbSizeHeader);
+
+    Windows_Hook::Inst()->GetRawInputData(hRawInput, uiCommand, pData, pcbSize, cbSizeHeader);
+
+    RawMouseEvent(*reinterpret_cast<RAWINPUT*>(pData));
+
+    *pcbSize = 0;
+
+    return 0;
+}
+/////////////////////////////////////////////////////////////////////////////////////
+
+Windows_Hook::Windows_Hook() :
+    initialized(false),
+    hooked(false),
+    _game_hwnd(nullptr),
+    _game_wndproc(nullptr),
+    GetRawInputBuffer(nullptr),
+    GetRawInputData(nullptr)
+{
+    //_library = LoadLibrary(DLL_NAME);
+}
+
+Windows_Hook::~Windows_Hook()
+{
+    PRINT_DEBUG("Windows Hook removed\n");
+
+    resetRenderState();
+
+    //FreeLibrary(reinterpret_cast<HMODULE>(_library));
+
+    _inst = nullptr;
+}
+
+Windows_Hook* Windows_Hook::Inst()
+{
+    if (_inst == nullptr)
+        _inst = new Windows_Hook;
+
+    return _inst;
+}
+
+const char* Windows_Hook::get_lib_name() const
+{
+    return DLL_NAME;
+}
+
+#endif//NO_OVERLAY

overlay_experimental/windows/Windows_Hook.h

@@ -0,0 +1,50 @@
+#ifndef __INCLUDED_WINDOWS_HOOK_H__
+#define __INCLUDED_WINDOWS_HOOK_H__
+
+#include "../Base_Hook.h"
+
+#ifdef __WINDOWS__
+#ifndef NO_OVERLAY
+
+class Windows_Hook : public Base_Hook
+{
+public:
+    static constexpr const char* DLL_NAME = "user32.dll";
+
+private:
+    static Windows_Hook* _inst;
+
+    // Variables
+    bool hooked;
+    bool initialized;
+    HWND _game_hwnd;
+    WNDPROC _game_wndproc;
+
+    // Functions
+    Windows_Hook();
+
+    // Hook to Windows window messages
+    decltype(GetRawInputBuffer)* GetRawInputBuffer;
+    decltype(GetRawInputData)* GetRawInputData;
+
+    static LRESULT CALLBACK HookWndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
+    static UINT WINAPI MyGetRawInputBuffer(PRAWINPUT pData, PUINT pcbSize, UINT cbSizeHeader);
+    static UINT WINAPI MyGetRawInputData(HRAWINPUT hRawInput, UINT uiCommand, LPVOID pData, PUINT pcbSize, UINT cbSizeHeader);
+
+public:
+    virtual ~Windows_Hook();
+
+    void resetRenderState();
+    void prepareForOverlay(HWND);
+
+    HWND GetGameHwnd() const;
+    WNDPROC GetGameWndProc() const;
+
+    bool start_hook();
+    static Windows_Hook* Inst();
+    virtual const char* get_lib_name() const;
+};
+
+#endif//NO_OVERLAY
+#endif//__WINDOWS__
+#endif//__INCLUDED_WINDOWS_HOOK_H__