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content / test / data / gpu / pixel_webgpu_import_video_frame_offscreen_canvas.html [blame]

<!DOCTYPE html>
<html>
<head>
  <title>WebGPU importExternalTexture videoFrame test</title>
  <style type="text/css">
  .nomargin {
    margin: 0px auto;
  }
  </style>
  <script type="text/javascript" src="pixel_webgpu_util.js"></script>
  <script type="text/javascript" src="webcodecs/webcodecs_common.js"></script>
  <script type="text/javascript">
    var g_swapsBeforeAck = 15;

    async function main() {
      let cnv = document.getElementById('placeholder');
      let offscreen = cnv.transferControlToOffscreen();
      let ctx = offscreen.getContext('2d');
      const gpuCanvas = document.getElementById('canvas_webgpu');
      const [gpuDevice, gpuContext] = await webGpuUtils.init(gpuCanvas);

      if (!gpuDevice || !gpuContext) {
        console.error("Failed to initialize WebGPU - skipping test");
        domAutomationController.send("FAILURE");
        return;
      }

      const urlSearchParams = new URLSearchParams(window.location.search);

      let source = await createFrameSource(urlSearchParams.get("sourceType"), cnv.width, cnv.height);
      if (!source) {
        console.error("Cannot get valid video frame - skipping test");
        domAutomationController.send("FAILURE");
        return;
      }

      let frame = await source.getNextFrame();
      ctx.drawImage(frame, 0, 0, cnv.width, cnv.height);

      const renderCallback = function() {
        webGpuUtils.importExternalTextureTest(gpuDevice, gpuContext, frame);
        frame.close();
        waitForFinish();
      };

      window.requestAnimationFrame(renderCallback);
    }

    function waitForFinish() {
      if (g_swapsBeforeAck == 0) {
        domAutomationController.send("SUCCESS");
      } else {
        g_swapsBeforeAck--;
        window.requestAnimationFrame(waitForFinish);
      }
    }
  </script>
</head>
<body onload="main()">
  <canvas id="placeholder" width="200" height="200" class="nomargin"></canvas>
  <canvas id="canvas_webgpu" width="200" height="200" class="nomargin"></canvas>
</body>
</html>