| Index: third_party/WebKit/LayoutTests/fast/canvas/canvas-imageSmoothing-disabled-scaling-down.html
|
| diff --git a/third_party/WebKit/LayoutTests/fast/canvas/canvas-imageSmoothing-disabled-scaling-down.html b/third_party/WebKit/LayoutTests/fast/canvas/canvas-imageSmoothing-disabled-scaling-down.html
|
| new file mode 100644
|
| index 0000000000000000000000000000000000000000..e40b901b776ed04b09f9531cbca302173687f9a3
|
| --- /dev/null
|
| +++ b/third_party/WebKit/LayoutTests/fast/canvas/canvas-imageSmoothing-disabled-scaling-down.html
|
| @@ -0,0 +1,38 @@
|
| +<!DOCTYPE HTML>
|
| +<script src="../../resources/testharness.js"></script>
|
| +<script src="../../resources/testharnessreport.js"></script>
|
| +<script>
|
| +function getCanvasDataFromDrawImage(source, disableSmoothing, shouldTransform)
|
| +{
|
| + var canvas = document.createElement("canvas");
|
| + canvas.width = 100;
|
| + canvas.height = 100;
|
| + var ctx = canvas.getContext("2d");
|
| + ctx.clearRect(0, 0, canvas.width, canvas.height);
|
| + if (disableSmoothing)
|
| + ctx.imageSmoothingEnabled = false;
|
| + if (shouldTransform) {
|
| + ctx.transform(0.5, 0, 0, 0.5, 0, 0); //scaling down
|
| + ctx.drawImage(source, 0, 0, source.width, source.height, 0, 0, 100, 100);
|
| + } else {
|
| + ctx.drawImage(source, 0, 0, source.width, source.height, 0, 0, 50, 50);
|
| + }
|
| + var d = ctx.getImageData(0, 0, 100, 100).data;
|
| + return d;
|
| +}
|
| +
|
| +test(function() {
|
| + var canvas = document.createElement('canvas');
|
| + canvas.height = 100;
|
| + canvas.width = 100;
|
| + var ctx = canvas.getContext('2d');
|
| + ctx.fillStyle = '#FF0000';
|
| + ctx.fillRect(0, 0, canvas.width, canvas.height);
|
| + var data1 = getCanvasDataFromDrawImage(canvas, false, false);
|
| + var data2 = getCanvasDataFromDrawImage(canvas, true, false);
|
| + var data3 = getCanvasDataFromDrawImage(canvas, true, true);
|
| + assert_array_equals(data1, data2, "drawImage() should have the same results with imageSmoothingEnabled = true and false when scaling down.");
|
| + assert_array_equals(data1, data3, "drawImage() should account for canvas transformation when testing whether it is scaling down the source or not");
|
| +}, 'Test drawImage with imageSmoothingEnabled=false and scaling down the source.');
|
| +
|
| +</script>
|
|
|
Chromium Code Reviews
Issue 2157953002:
Change filter quality when scaling-down in drawImage (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master