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Unified Diff: third_party/WebKit/LayoutTests/fast/canvas/canvas-createImageBitmap-resize.html

Issue 2035113002: Implement ImageBitmapOptions resize (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: address comments Created 4 years, 5 months ago
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Index: third_party/WebKit/LayoutTests/fast/canvas/canvas-createImageBitmap-resize.html
diff --git a/third_party/WebKit/LayoutTests/fast/canvas/canvas-createImageBitmap-resize.html b/third_party/WebKit/LayoutTests/fast/canvas/canvas-createImageBitmap-resize.html
new file mode 100644
index 0000000000000000000000000000000000000000..b734fb0a36c54ae05a29664b670fd7856b960941
--- /dev/null
+++ b/third_party/WebKit/LayoutTests/fast/canvas/canvas-createImageBitmap-resize.html
@@ -0,0 +1,156 @@
+<!DOCTYPE HTML>
+<script src="../../resources/testharness.js"></script>
+<script src="../../resources/testharnessreport.js"></script>
+<script>
+function checkNoCrop(imageBitmap)
+{
+ var canvas = document.createElement("canvas");
+ canvas.width = 50;
+ canvas.height = 50;
+ var ctx = canvas.getContext("2d");
+ ctx.clearRect(0, 0, canvas.width, canvas.height);
+ ctx.drawImage(imageBitmap, 0, 0);
+ var d = ctx.getImageData(0, 0, 1, 1).data;
+ assert_array_equals(d, [255, 0, 0, 255], "This pixel should be red.");
+ console.log(d[0] + " " + d[1] + " " + d[2] + " " + d[3]);
+ d = ctx.getImageData(39, 0, 1, 1).data;
+ assert_array_equals(d, [0, 255, 0, 255], "This pixel should be green.");
+ console.log(d[0] + " " + d[1] + " " + d[2] + " " + d[3]);
+ d = ctx.getImageData(0, 39, 1, 1).data;
+ assert_array_equals(d, [0, 0, 255, 255], "This pixel should be blue.");
+ console.log(d[0] + " " + d[1] + " " + d[2] + " " + d[3]);
+ d = ctx.getImageData(39, 39, 1, 1).data;
+ assert_array_equals(d, [0, 0, 0, 255], "This pixel should be black.");
+ console.log(d[0] + " " + d[1] + " " + d[2] + " " + d[3]);
+ d = ctx.getImageData(41, 41, 1, 1).data;
+ assert_array_equals(d, [0, 0, 0, 0], "This pixel should be transparent black.");
+ console.log(d[0] + " " + d[1] + " " + d[2] + " " + d[3]);
+}
+
+function checkCrop(imageBitmap)
+{
+ var canvas = document.createElement("canvas");
+ canvas.width = 50;
+ canvas.height = 50;
+ var ctx = canvas.getContext("2d");
+ ctx.clearRect(0, 0, canvas.width, canvas.height);
+ ctx.drawImage(imageBitmap, 0, 0);
+ var d = ctx.getImageData(0, 0, 1, 1).data;
+ assert_array_equals(d, [255, 0, 0, 255], "This pixel should be red.");
+ d = ctx.getImageData(19, 0, 1, 1).data;
+ assert_array_equals(d, [0, 255, 0, 255], "This pixel should be green.");
+ d = ctx.getImageData(0, 19, 1, 1).data;
+ assert_array_equals(d, [0, 0, 255, 255], "This pixel should be blue.");
+ d = ctx.getImageData(19, 19, 1, 1).data;
+ assert_array_equals(d, [0, 0, 0, 255], "This pixel should be black.");
+ d = ctx.getImageData(21, 21, 1, 1).data;
+ assert_array_equals(d, [0, 0, 0, 0], "This pixel should be transparent black.");
+}
+
+function compareBitmaps(bitmap1, bitmap2)
+{
+ var canvas1 = document.createElement("canvas");
+ var canvas2 = document.createElement("canvas");
+ canvas1.width = 50;
+ canvas1.height = 50;
+ canvas2.width = 50;
+ canvas2.height = 50;
+ var ctx1 = canvas1.getContext("2d");
+ var ctx2 = canvas2.getContext("2d");
+ ctx1.clearRect(0, 0, canvas1.width, canvas1.height);
+ ctx2.clearRect(0, 0, canvas2.width, canvas2.height);
+ ctx1.drawImage(bitmap1, 0, 0);
+ ctx2.drawImage(bitmap2, 0, 0);
+ var data1 = ctx1.getImageData(0, 0, 50, 50).data;
+ var data2 = ctx2.getImageData(0, 0, 50, 50).data;
+ var dataMatched = true;
+ for (var i = 0; i < data1.length; i++) {
+ if (data1[i] != data2[i]) {
+ dataMatched = false;
+ break;
+ }
+ }
+ assert_false(dataMatched);
+}
+
+function testImageBitmap(source)
+{
+ return Promise.all([
+ createImageBitmap(source, {resizeWidth: 40, resizeHeight: 40, resizeQuality: "high"}),
+ createImageBitmap(source, {resizeWidth: 40, resizeHeight: 40, resizeQuality: "medium"}),
+ createImageBitmap(source, {resizeWidth: 40, resizeHeight: 40, resizeQuality: "low"}),
+ createImageBitmap(source, {resizeWidth: 40, resizeHeight: 40, resizeQuality: "pixelated"}),
+ createImageBitmap(source, 10, 10, 20, 20, {resizeWidth: 40, resizeHeight: 40, resizeQuality: "high"}),
+ createImageBitmap(source, 10, 10, 20, 20, {resizeWidth: 40, resizeHeight: 40, resizeQuality: "medium"}),
+ createImageBitmap(source, 10, 10, 20, 20, {resizeWidth: 40, resizeHeight: 40, resizeQuality: "low"}),
+ createImageBitmap(source, 10, 10, 20, 20, {resizeWidth: 40, resizeHeight: 40, resizeQuality: "pixelated"}),
+ ]).then(([noCropHigh, noCropMedium, noCropLow, noCropPixelated, cropHigh, cropMedium, cropLow, cropPixelated]) => {
+ checkNoCrop(noCropHigh);
+ checkNoCrop(noCropMedium);
+ checkNoCrop(noCropLow);
+ checkNoCrop(noCropPixelated);
+ checkCrop(cropHigh);
+ checkCrop(cropMedium);
+ checkCrop(cropLow);
+ checkCrop(cropPixelated);
+ // Brute-force comparison among all bitmaps is too expensive
+ compareBitmaps(noCropHigh, noCropMedium);
+ compareBitmaps(noCropLow, noCropPixelated);
+ compareBitmaps(cropHigh, cropMedium);
+ compareBitmaps(cropLow, cropPixelated);
+ });
+}
+
+function initializeTestCanvas()
+{
+ var testCanvas = document.createElement("canvas");
+ testCanvas.width = 20;
+ testCanvas.height = 20;
+ var testCtx = testCanvas.getContext("2d");
+ testCtx.fillStyle = "rgb(255, 0, 0)";
+ testCtx.fillRect(0, 0, 10, 10);
+ testCtx.fillStyle = "rgb(0, 255, 0)";
+ testCtx.fillRect(10, 0, 10, 10);
+ testCtx.fillStyle = "rgb(0, 0, 255)";
+ testCtx.fillRect(0, 10, 10, 10);
+ testCtx.fillStyle = "rgb(0, 0, 0)";
+ testCtx.fillRect(10, 10, 10, 10);
+ return testCanvas;
+}
+
+// Blob
+promise_test(function() {
+ return new Promise((resolve, reject) => {
+ var xhr = new XMLHttpRequest();
+ xhr.open("GET", 'resources/pattern.png');
+ xhr.responseType = 'blob';
+ xhr.send();
+ xhr.onload = function() {
+ resolve(xhr.response);
+ };
+ }).then(testImageBitmap);
+}, 'createImageBitmap from a Blob with resize option.');
+
+// HTMLCanvasElement
+promise_test(function() {
+ var testCanvas = initializeTestCanvas();
+ return testImageBitmap(testCanvas);
+}, 'createImageBitmap from a HTMLCanvasElement with resize option.');
+
+// HTMLImageElement
+promise_test(function() {
+ return new Promise((resolve, reject) => {
+ var image = new Image();
+ image.onload = function() {
+ resolve(image);
+ }
+ image.src = 'resources/pattern.png'
+ }).then(testImageBitmap);
+}, 'createImageBitmap from a HTMLImageElement with resize option.');
+
+// ImageBitmap
+promise_test(function() {
+ var testCanvas = initializeTestCanvas();
+ return createImageBitmap(testCanvas).then(testImageBitmap);
+}, 'createImageBitmap from an ImageBitmap with resize option.');
+</script>
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