| <!DOCTYPE html> |
| <html> |
| <body> |
| <video id="video" loop></video> |
| <script src="../resources/runner.js"></script> |
| <script src="resources/canvas_runner.js"></script> |
| <script> |
| var videoElement = document.getElementById("video"); |
| var destCanvas2D = document.createElement("canvas"); |
| var destCtx2D = destCanvas2D.getContext("2d"); |
| |
| function setSize(width, height) { |
| destCanvas2D.width = width; |
| destCanvas2D.height = height; |
| } |
| |
| function addPlayCallback(videoElement) { |
| // This logic makes sure this perf test starts after playing the video. |
| videoElement.addEventListener("canplaythrough", startVideo, true); |
| videoElement.addEventListener("play", startPerfTest, true); |
| videoElement.addEventListener('error', function(ev) { |
| CanvasRunner.logFatalError("\nmp4 codec is not supported on this platform. Received error event:" + ev.target.error.code + "\n"); |
| }, false); |
| videoElement.src = "../resources/bear-1280x720.mp4"; |
| } |
| |
| function startVideo() { |
| // loop can emit this event again. |
| videoElement.removeEventListener("canplaythrough", startVideo, true); |
| videoElement.play(); |
| } |
| |
| function startPerfTest() { |
| CanvasRunner.start({ |
| description: "This bench test checks the speed on drawing Video element to HW accelerated Canvas2D(1024x1024).", |
| doRun: doRun, |
| ensureComplete: ensureComplete}); |
| } |
| |
| function doRun() { |
| // draw Video |
| destCtx2D.drawImage(videoElement, 0, 0); |
| } |
| |
| function ensureComplete() { |
| // Calling getImageData() is just to flush out the content when |
| // accelerated 2D canvas is in use. The cost of reading 1x1 pixels is low. |
| destCtx2D.getImageData(0, 0, 1, 1); |
| } |
| |
| window.onload = function () { |
| // It should use setMinimumAccelerated2dCanvasSize() to enable accelerated Canvas for a specified size |
| // but this API is not available in JS or WebPage. Assume the threshold size is 256x257 |
| // and the dest canvas is HW accelerated Canvas when setting its size to 1024x1024. |
| setSize(1024, 1024); |
| addPlayCallback(videoElement); |
| } |
| |
| </script> |
| </body> |
| </html> |