Added opengl hook

overlay_experimental/OpenGL_Hook.h

@@ -0,0 +1,41 @@
+#ifndef __INCLUDED_OPENGL_HOOK_H__
+#define __INCLUDED_OPENGL_HOOK_H__
+
+#include "DirectX_VTables.h"
+#include "Base_Hook.h"
+
+class OpenGL_Hook : public Base_Hook
+{
+public:
+    static constexpr const char DLL_NAME[] = "opengl32.dll";
+    
+    using wglSwapBuffers_t = BOOL(WINAPI)(HDC);
+    using wglMakeCurrent_t = BOOL(WINAPI)(HDC, HGLRC);
+
+private:
+    // Variables
+    bool initialized;
+
+    // Functions
+    OpenGL_Hook();
+    virtual ~OpenGL_Hook();
+
+    void hook_ogl();
+    void resetRenderState();
+    void prepareForOverlay(HDC hDC);
+
+    // Hook to render functions
+    static BOOL WINAPI MywglSwapBuffers(HDC hDC);
+
+    wglSwapBuffers_t* wglSwapBuffers;
+    
+    // Hook functions so we know we use OGL
+    static BOOL WINAPI MywglMakeCurrent(HDC hDC, HGLRC hGLRC);
+
+    wglMakeCurrent_t* wglMakeCurrent;
+
+public:
+    static void Create(); // Initialize OGL Hook.
+};
+
+#endif//__INCLUDED_OPENGL_HOOK_H__