| <!DOCTYPE html> |
| <html> |
| <body> |
| <script src="../resources/runner.js"></script> |
| <script> |
| var imgHeight = 1024; |
| var imgWidth = 1024; |
| var canvas = document.createElement("canvas"); |
| canvas.width = imgWidth; |
| canvas.height = imgHeight; |
| var context = canvas.getContext('2d'); |
| var image = context.createImageData(imgWidth, imgHeight); |
| |
| function rand(range) { |
| return Math.floor(Math.random() * range); |
| } |
| |
| function initializeImageData() { |
| for(var i = 0; i < image.data.length; i++) |
| image.data[i] = rand(256); |
| } |
| |
| function imageBitmapFromImageData() { |
| /*The return Promise is not retained because this test |
| is meant to only measure the immediate run time of |
| createImageBitmap from an ImageData, which is known |
| to be implemented in a way that does all the work |
| synchronously, even though the API is technically async.*/ |
| createImageBitmap(image, 0, 0, imgWidth, imgHeight); |
| } |
| |
| initializeImageData(); |
| PerfTestRunner.measureRunsPerSecond({run: imageBitmapFromImageData, description: "This bench test checks the speed on creating ImageBitmap from ImageData(1024x1024)."}); |
| </script> |
| </body> |
| </html> |
