| <!DOCTYPE html> |
| <html> |
| <body> |
| <script src="../resources/runner.js"></script> |
| <script> |
| |
| var source = document.createElement("canvas"); |
| source.width = 300; |
| source.height = 150; |
| source.getContext("2d").fillStyle = 'rgba(0,128,0,0.5)'; |
| source.getContext("2d").fillRect(0, 0, source.width, source.height); |
| |
| var target = document.createElement("canvas"); |
| target.width = source.width; |
| target.height = source.height; |
| var context = target.getContext("2d") |
| context.globalCompositeOperation = "destination-atop"; |
| |
| PerfTestRunner.measureRunsPerSecond({run: function() { |
| context.drawImage(source, 0, 0); |
| }}); |
| </script> |
| </body> |
| </html> |
