Import wpt@3c8896ae408c8fd594979da7c99970029e7856a7

third_party/WebKit/LayoutTests/imported/wpt/offscreen-canvas/compositing/2d.composite.globalAlpha.canvascopy.worker.js

+// DO NOT EDIT! This test has been generated by tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.composite.globalAlpha.canvascopy
+// Description:
+// Note:
+
+importScripts("/resources/testharness.js");
+importScripts("/common/canvas-tests.js");
+
+var t = async_test("");
+t.step(function() {
+
+var offscreenCanvas = new OffscreenCanvas(100, 50);
+var ctx = offscreenCanvas.getContext('2d');
+
+var offscreenCanvas2 = new OffscreenCanvas(100, 50);
+var ctx2 = offscreenCanvas2.getContext('2d');
+ctx2.fillStyle = '#0f0';
+ctx2.fillRect(0, 0, 100, 50);
+ctx.fillStyle = '#f00';
+ctx.fillRect(0, 0, 100, 50);
+ctx.globalCompositeOperation = 'copy'
+ctx.globalAlpha = 0.51;
+ctx.drawImage(offscreenCanvas2, 0, 0);
+_assertPixelApprox(offscreenCanvas, 50,25, 0,255,0,130, "50,25", "0,255,0,130", 2);
+
+t.done();
+
+});
+done();