| <!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"); |
| var dummyCanvas2D = document.createElement("canvas"); |
| var dummyCtx2D = dummyCanvas2D.getContext("2d"); |
| |
| function setSize(width, height) { |
| destCanvas2D.width = width; |
| destCanvas2D.height = height; |
| dummyCanvas2D.width = width; |
| dummyCanvas2D.height = height; |
| } |
| |
| 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() { |
| // Using destCanvas2D as a source image is just to flush out the content when |
| // accelerated 2D canvas is in use. |
| // dummyCtx2D must also be accelerated to prevent destCanvas2D from becoming |
| // non-accelerated due to the DisableAccelerationToAvoidReadbacks heuristic. |
| dummyCtx2D.drawImage(destCanvas2D, 0, 0, 1, 1, 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); |
| |
| videoElement.src = "resources/bear-1280x720-long.mp4"; |
| if(!videoElement.canPlayType('video/mp4').replace(/no/, '')) { |
| CanvasRunner.logFatalError("video/mp4 is unsupported"); |
| }; |
| CanvasRunner.startPlayingAndWaitForVideo(videoElement, startPerfTest); |
| } |
| |
| </script> |
| </body> |
| </html> |
