| <!DOCTYPE html> |
| <html> |
| <body> |
| <script src="../resources/runner.js"></script> |
| <script src="resources/canvas_runner.js"></script> |
| <script> |
| var canvas2D = document.createElement("canvas"); |
| var ctx2D = canvas2D.getContext("2d"); |
| var canvas3D = document.createElement('canvas'); |
| var gl = canvas3D.getContext('webgl'); |
| if (!gl) |
| CanvasRunner.logFatalError("WebGL is not supported or enabled on this platform!"); |
| |
| var dummyCanvas2D = document.createElement("canvas"); |
| var dummyCtx2D = dummyCanvas2D.getContext("2d"); |
| |
| function setSize(canvas2DWidth, canvas2DHeight, webglWidth, webglHeight) { |
| canvas2D.width = canvas2DWidth; |
| canvas2D.height = canvas2DHeight; |
| dummyCanvas2D.width = canvas2DWidth; |
| dummyCanvas2D.height = canvas2DWidth; |
| canvas3D.width = webglWidth; |
| canvas3D.height = webglHeight; |
| } |
| |
| function rand(range) { |
| return Math.floor(Math.random() * range); |
| } |
| |
| function renderWebGL(gl) { |
| gl.disable(gl.SCISSOR_TEST); |
| gl.clear(gl.COLOR_BUFER_BIT); |
| gl.enable(gl.SCISSOR_TEST); |
| gl.scissor(rand(1024), rand(1024), rand(1024), rand(1024)); |
| gl.clearColor(Math.random(), Math.random(), Math.random(), 1); |
| gl.clear(gl.COLOR_BUFFER_BIT); |
| } |
| |
| function doRun() { |
| renderWebGL(gl); |
| // draw dynamic WebGL |
| ctx2D.drawImage(canvas3D, 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.drawImage(canvas2D, 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, 1024, 1024); |
| renderWebGL(gl); |
| CanvasRunner.start({ |
| description: "This bench test checks the speed on drawing dynamic WebGL(1024x1024) to HW accelerated Canvas2D(1024x1024).", |
| doRun: doRun, |
| ensureComplete: ensureComplete}); |
| } |
| |
| </script> |
| </body> |
| </html> |
