| <!DOCTYPE html> |
| <html> |
| <body> |
| <script src="../resources/runner.js"></script> |
| <script> |
| |
| var canvas2D = document.createElement("canvas"); |
| var ctx2D = canvas2D.getContext("2d"); |
| var canvas3D = document.createElement('canvas'); |
| var gl = canvas3D.getContext('experimental-webgl'); |
| if(!gl) |
| PerfTestRunner.log("\nWebGL is not supported or enabled on this platform!\n"); |
| var MEASURE_DRAW_TIMES = 1000; |
| var MAX_COUNT = 60000; |
| var count = 0; |
| |
| function setSize(width, height) { |
| canvas2D.width = width; |
| canvas2D.height = height; |
| canvas3D.width = width; |
| canvas3D.height = height; |
| } |
| |
| function rand(range) { |
| return Math.floor(Math.random() * range); |
| } |
| |
| function fillCanvas(ctx2d, canvas2d) { |
| ctx2d.fillStyle = "rgba(" + rand(255) + "," + rand(255) + "," + rand(255) + "," + rand(255) + ")"; |
| ctx2d.fillRect(0, 0, canvas2d.width, canvas2d.height); |
| } |
| |
| function uploadCanvas2DToWebGLTexture() { |
| if (gl) { |
| var tex = gl.createTexture(); |
| gl.bindTexture(gl.TEXTURE_2D, tex); |
| |
| var start = PerfTestRunner.now(); |
| for (var i = 0; i < MEASURE_DRAW_TIMES; i++) { |
| gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, canvas2D); |
| } |
| gl.readPixels(0, 0, 1, 1, gl.RGBA, gl.UNSIGNED_BYTE, new Uint8Array(4)); |
| gl.deleteTexture(tex); |
| count++; |
| |
| var elapsedTime = PerfTestRunner.now() - start; |
| PerfTestRunner.measureValueAsync(MEASURE_DRAW_TIMES * 1000 / elapsedTime); |
| } else |
| PerfTestRunner.measureValueAsync(0); |
| if (count < MAX_COUNT) |
| requestAnimationFrame(uploadCanvas2DToWebGLTexture); |
| } |
| |
| function onCompletedRun() { |
| count = MAX_COUNT; |
| } |
| |
| window.onload = function () { |
| PerfTestRunner.prepareToMeasureValuesAsync({done: onCompletedRun, unit: 'runs/s', |
| description: "This bench test checks the speed on uploading 2d Canvas(1024x1024) to Webgl Texture(1024x1024)."}); |
| setSize(1024, 1024); |
| fillCanvas(ctx2D, canvas2D); |
| uploadCanvas2DToWebGLTexture(); |
| } |
| |
| </script> |
| </body> |
| </html> |
