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Use setInterval and two canvases for ambient mode

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This commit is contained in:
Emre Özcan 2024-03-20 19:00:30 +03:00
parent 6390fb6155
commit c9d19b76a6
1 changed files with 36 additions and 19 deletions
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55
html/poketube.ejs
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@ -1075,7 +1075,8 @@ display: block; !important;" autoplay controls>
</video>
<% if (!a) { %>
<canvas width="12" height="6" id="ambient-canvas"></canvas>
<canvas width="12" height="6" class="ambient-canvas" id="ambient-canvas-1"></canvas>
<canvas width="12" height="6" class="ambient-canvas" id="ambient-canvas-2"></canvas>
<% } %>
@ -1930,29 +1931,43 @@ if (/[?&]autoplay=/.test(location.search)) {
<script>
const AMvideo = document.getElementById("video")
const canvas = document.getElementById("ambient-canvas")
const ctx = canvas.getContext("2d")
const oddCanvas = document.getElementById("ambient-canvas-1")
const evenCanvas = document.getElementById("ambient-canvas-2")
const oddCtx = oddCanvas.getContext("2d")
const evenCtx = evenCanvas.getContext("2d")
let requestId;
let lastDrawTime = 0; // Timestamp of the last draw request
const loop = () => {
const now = performance.now();
const elapsed = now - lastDrawTime;
if (elapsed >= (1000 / 30)) {
lastDrawTime = now;
ctx.drawImage(AMvideo, 0, 0, canvas.width, canvas.height);
const frameIntervalMs = 200
const canvasOpacity = "0.4"
let intervalId
let oddFrame = true
const drawFrame = () => {
if (oddFrame) {
oddCtx.drawImage(AMvideo, 0, 0, oddCanvas.width, oddCanvas.height)
transitionToOddCanvas()
} else {
evenCtx.drawImage(AMvideo, 0, 0, evenCanvas.width, evenCanvas.height)
transitionToEvenCanvas()
}
requestId = window.requestAnimationFrame(loop);
oddFrame = !oddFrame
};
const transitionToOddCanvas = () => {
oddCanvas.style.opacity = canvasOpacity
evenCanvas.style.opacity = "0"
}
const transitionToEvenCanvas = () => {
evenCanvas.style.opacity = canvasOpacity
oddCanvas.style.opacity = "0"
}
const drawStart = () => {
requestId = window.requestAnimationFrame(loop)
intervalId = window.setInterval(drawFrame, frameIntervalMs)
}
const drawPause = () => {
window.cancelAnimationFrame(requestId)
requestId = undefined
if (intervalId) window.clearInterval(intervalId)
}
const init = () => {
@ -1960,12 +1975,15 @@ const init = () => {
AMvideo.addEventListener("play", drawStart, false)
AMvideo.addEventListener("pause", drawPause, false)
AMvideo.addEventListener("ended", drawPause, false)
oddCanvas.style.transition = evenCanvas.style.transition = `opacity ${frameIntervalMs}ms`
}
const cleanup = () => {
AMvideo.removeEventListener("play", drawStart)
AMvideo.removeEventListener("pause", drawPause)
AMvideo.removeEventListener("ended", drawPause)
drawPause();
}
window.addEventListener("load", init)
@ -1977,7 +1995,7 @@ window.addEventListener("unload", cleanup)
z-index: 0;
}
.popup {z-index: 1}
#ambient-canvas {
.ambient-canvas {
width: 100%;
height: calc(100% - 18px);
position: absolute;
@ -1985,7 +2003,6 @@ window.addEventListener("unload", cleanup)
border-radius: 18px;
filter: blur(20px);
transform: scale(1.1);
opacity: 0.4;
z-index: -1;
}
</style>