Home | History | Annotate | Download | only in Canvas 
      1 <!DOCTYPE html>
      2 <html>
      3 <body>
      4 <script src="../resources/runner.js"></script>
      5 <script>
      6 
      7 var sourceCanvas3D = document.createElement('canvas');
      8 var sourceCtx = sourceCanvas3D.getContext('experimental-webgl');
      9 var destCanvas3D = document.createElement('canvas');
     10 var destCtx = destCanvas3D.getContext('experimental-webgl');
     11 if (!sourceCtx || !destCtx)
     12     PerfTestRunner.log("\nWebGL is not supported or enabled on this platform!\n");
     13 var MEASURE_DRAW_TIMES = 100;
     14 var MAX_COUNT = 60000;
     15 var count = 0;
     16  
     17 function setSize(width, height) {
     18     sourceCanvas3D.width = width;
     19     sourceCanvas3D.height = height;
     20     destCanvas3D.width = width;
     21     destCanvas3D.height = height;
     22 }
     23 
     24 function rand(range) {
     25     return Math.floor(Math.random() * range);
     26 }
     27 
     28 function renderWebGL(gl) {
     29     gl.disable(gl.SCISSOR_TEST);
     30     gl.clear(gl.COLOR_BUFER_BIT);
     31     gl.enable(gl.SCISSOR_TEST);
     32     gl.scissor(rand(1024), rand(1024), rand(1024), rand(1024));
     33     gl.clearColor(Math.random(), Math.random(), Math.random(), 1);
     34     gl.clear(gl.COLOR_BUFFER_BIT);
     35 }
     36 
     37 function uploadWebGLToWebGLTexture() {
     38     if (sourceCtx && destCtx) {
     39         var tex = destCtx.createTexture();
     40         destCtx.bindTexture(destCtx.TEXTURE_2D, tex);
     41 
     42         var start = PerfTestRunner.now();
     43 
     44         for (var i = 0; i < MEASURE_DRAW_TIMES; i++) {
     45             destCtx.texImage2D(destCtx.TEXTURE_2D, 0, destCtx.RGBA, destCtx.RGBA, destCtx.UNSIGNED_BYTE, sourceCanvas3D);
     46         }
     47         destCtx.readPixels(0, 0, 1, 1, sourceCtx.RGBA, sourceCtx.UNSIGNED_BYTE, new Uint8Array(4));
     48         destCtx.deleteTexture(tex);
     49         count++;
     50 
     51         var elapsedTime = PerfTestRunner.now() - start;
     52         PerfTestRunner.measureValueAsync(MEASURE_DRAW_TIMES * 1000 / elapsedTime);
     53     } else
     54         PerfTestRunner.measureValueAsync(0);
     55     if (count < MAX_COUNT)
     56         requestAnimationFrame(uploadWebGLToWebGLTexture);
     57 }
     58 
     59 function onCompletedRun() {
     60     count = MAX_COUNT;
     61 }
     62 
     63 window.onload = function () {
     64     PerfTestRunner.prepareToMeasureValuesAsync({done: onCompletedRun, unit: 'runs/s',
     65         description: "This benchmark checks the speed on uploading WebGL(1024x1024) to WebGL Texture(1024x1024)."});
     66     setSize(1024, 1024);
     67     if (sourceCtx)
     68         renderWebGL(sourceCtx);
     69     uploadWebGLToWebGLTexture();
     70 }
     71 
     72 </script>
     73 </body>
     74 </html>
     75