| <!DOCTYPE html> |
| <html> |
| <body> |
| <script src="../resources/runner.js"></script> |
| <script> |
| |
| var sourceCanvas3D = document.createElement('canvas'); |
| var sourceCtx = sourceCanvas3D.getContext('experimental-webgl'); |
| var destCanvas3D = document.createElement('canvas'); |
| var destCtx = destCanvas3D.getContext('experimental-webgl'); |
| if (!sourceCtx || !destCtx) |
| PerfTestRunner.log("\nWebGL is not supported or enabled on this platform!\n"); |
| var MEASURE_DRAW_TIMES = 100; |
| var MAX_COUNT = 60000; |
| var count = 0; |
| |
| function setSize(width, height) { |
| sourceCanvas3D.width = width; |
| sourceCanvas3D.height = height; |
| destCanvas3D.width = width; |
| destCanvas3D.height = height; |
| } |
| |
| 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 uploadWebGLToWebGLTexture() { |
| if (sourceCtx && destCtx) { |
| var tex = destCtx.createTexture(); |
| destCtx.bindTexture(destCtx.TEXTURE_2D, tex); |
| |
| var start = PerfTestRunner.now(); |
| |
| for (var i = 0; i < MEASURE_DRAW_TIMES; i++) { |
| destCtx.texImage2D(destCtx.TEXTURE_2D, 0, destCtx.RGBA, destCtx.RGBA, destCtx.UNSIGNED_BYTE, sourceCanvas3D); |
| } |
| destCtx.readPixels(0, 0, 1, 1, sourceCtx.RGBA, sourceCtx.UNSIGNED_BYTE, new Uint8Array(4)); |
| destCtx.deleteTexture(tex); |
| count++; |
| |
| var elapsedTime = PerfTestRunner.now() - start; |
| PerfTestRunner.measureValueAsync(MEASURE_DRAW_TIMES * 1000 / elapsedTime); |
| } else |
| PerfTestRunner.measureValueAsync(0); |
| if (count < MAX_COUNT) |
| requestAnimationFrame(uploadWebGLToWebGLTexture); |
| } |
| |
| function onCompletedRun() { |
| count = MAX_COUNT; |
| } |
| |
| window.onload = function () { |
| PerfTestRunner.prepareToMeasureValuesAsync({done: onCompletedRun, unit: 'runs/s', |
| description: "This benchmark checks the speed on uploading WebGL(1024x1024) to WebGL Texture(1024x1024)."}); |
| setSize(1024, 1024); |
| if (sourceCtx) |
| renderWebGL(sourceCtx); |
| uploadWebGLToWebGLTexture(); |
| } |
| |
| </script> |
| </body> |
| </html> |
