File: canvas-webgl-translate-in-animation.html

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<!DOCTYPE html>
<html class=reftest-wait>
<title>CSS Test: translate webgl canvas in an animation via set current time.</title>
<link rel="author" title="Vladimir Levin" href="mailto:vmpstr@chromium.org"/>
<link rel="help" href="https://www.w3.org/TR/css-transforms-1/#funcdef-transform-translate"/>
<link rel="match" href="canvas-webgl-translate-in-animation-ref.html"/>
<meta name="assert" content="canvas is translated by half the total distance"/>
<script src="/common/reftest-wait.js"></script>

<style>
@keyframes move {
  to { transform: translate(300px); }
}

canvas {
  will-change: transform;
  animation: move;
  animation-duration: 1s;
  animation-timing-function: linear;
  animation-play-state: paused;
}
</style>

<canvas id="canvas" width="150" height="150"></canvas>

<script>
async function runTest() {
  const gl = canvas.getContext("webgl");
  gl.clearColor(0.0, 1.0, 0.0, 1.0);
  gl.clear(gl.COLOR_BUFFER_BIT);

  requestAnimationFrame(() => {
    document.getAnimations().forEach((animation) => {
      animation.currentTime = 500;
    });
    takeScreenshot();
  });
}
onload = () => requestAnimationFrame(() => requestAnimationFrame(runTest));
</script>
</html>