Import wpt@5915964199b07226bf6d8fbb177a63b1f272907a

third_party/WebKit/LayoutTests/imported/wpt/offscreen-canvas/shadows/2d.shadow.image.alpha.worker.js

+// DO NOT EDIT! This test has been generated by tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.shadow.image.alpha
+// Description:Shadows are drawn correctly for partially-transparent images
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/common/canvas-tests.js");
+
+var t = async_test("Shadows are drawn correctly for partially-transparent images");
+t.step(function() {
+
+var offscreenCanvas = new OffscreenCanvas(100, 50);
+var ctx = offscreenCanvas.getContext('2d');
+
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.shadowOffsetY = 50;
+ctx.shadowColor = '#00f';
+var promise = new Promise(function(resolve, reject) {
+    var xhr = new XMLHttpRequest();
+    xhr.open("GET", '/images/transparent50.png');
+    xhr.responseType = 'blob';
+    xhr.send();
+    xhr.onload = function() {
+        resolve(xhr.response);
+    };
+});
+promise.then(function(response) {
+    ctx.drawImage(response, 0, -50);
+    _assertPixelApprox(offscreenCanvas, 50,25, 127,0,127,255, "50,25", "127,0,127,255", 2);
+});
+
+t.done();
+
+});
+done();