Import wpt@3c8896ae408c8fd594979da7c99970029e7856a7

third_party/WebKit/LayoutTests/imported/wpt/offscreen-canvas/compositing/2d.composite.uncovered.image.destination-atop.worker.js

Index: third_party/WebKit/LayoutTests/imported/wpt/offscreen-canvas/compositing/2d.composite.uncovered.image.destination-atop.worker.js
diff --git a/third_party/WebKit/LayoutTests/imported/wpt/offscreen-canvas/compositing/2d.composite.uncovered.image.destination-atop.worker.js b/third_party/WebKit/LayoutTests/imported/wpt/offscreen-canvas/compositing/2d.composite.uncovered.image.destination-atop.worker.js
new file mode 100644
index 0000000000000000000000000000000000000000..c2799605e016aae50bf45ffccd5cae5a21b8a4c1
--- /dev/null
+++ b/third_party/WebKit/LayoutTests/imported/wpt/offscreen-canvas/compositing/2d.composite.uncovered.image.destination-atop.worker.js
@@ -0,0 +1,37 @@
+// DO NOT EDIT! This test has been generated by tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.uncovered.image.destination-atop
+// Description:drawImage() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/common/canvas-tests.js");
+
+var t = async_test("drawImage() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.");
+t.step(function() {
+
+var offscreenCanvas = new OffscreenCanvas(100, 50);
+var ctx = offscreenCanvas.getContext('2d');
+
+
+ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'destination-atop';
+var promise = new Promise(function(resolve, reject) {
+    var xhr = new XMLHttpRequest();
+    xhr.open("GET", '/images/yellow.png');
+    xhr.responseType = 'blob';
+    xhr.send();
+    xhr.onload = function() {
+        resolve(xhr.response);
+    };
+});
+promise.then(function(response) {
+    ctx.drawImage(response, 40, 40, 10, 10, 40, 50, 10, 10);
+    _assertPixelApprox(offscreenCanvas, 15,15, 0,0,0,0, "15,15", "0,0,0,0", 5);
+    _assertPixelApprox(offscreenCanvas, 50,25, 0,0,0,0, "50,25", "0,0,0,0", 5);
+});
+
+t.done();
+
+});
+done();