Chromium Code Reviews Chromium Code Reviews
Issue 1387933002:
Adding performance benchmark for creating imagebitmap from imagedata (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master| Index: third_party/WebKit/PerformanceTests/Canvas/createImageBitmapFromImageData.html |
| diff --git a/third_party/WebKit/PerformanceTests/Canvas/createImageBitmapFromImageData.html b/third_party/WebKit/PerformanceTests/Canvas/createImageBitmapFromImageData.html |
| new file mode 100644 |
| index 0000000000000000000000000000000000000000..2be316c78773cc344639961d872542b5519e520b |
| --- /dev/null |
| +++ b/third_party/WebKit/PerformanceTests/Canvas/createImageBitmapFromImageData.html |
| @@ -0,0 +1,32 @@ |
| +<!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 setImageData() { |
|
Justin Novosad
2015/10/06 02:17:53
I would call this initializeImageData.
|
| + for(var i = 0; i < image.data.length; i+= 4) |
|
Justin Novosad
2015/10/06 02:17:53
if you just incremented i by 1, you would not need
|
| + for(var j = 0; j < 4; j++) |
| + image.data[i+j] = rand(255); |
|
Justin Novosad
2015/10/06 02:17:52
Not that it matters much, but to produce values be
|
| +} |
| + |
| +function imageBitmapFromImageData() { |
| + createImageBitmap(image, 0, 0, imgWidth, imgHeight); |
|
Justin Novosad
2015/10/06 02:17:53
Add a comment to explain that the return Promise i
|
| +} |
| + |
| +setImageData(); |
| +PerfTestRunner.measureRunsPerSecond({run: imageBitmapFromImageData, description: "This bench test checks the speed on creating ImageBitmap from ImageData(1024x1024)."}); |
| +</script> |
| +</body> |
| +</html> |
