https://github.com/web-platform-tests/wpt
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Tip revision: 1503470039390008dc011a55ce82f41aa52fa8aa authored by Mikhail Pozdnyakov on 16 March 2018, 12:55:10 UTC
[Sensor] Add feature detection
Tip revision: 1503470
2d.composite.globalAlpha.canvas.worker.js
// DO NOT EDIT! This test has been generated by tools/gentest.py.
// OffscreenCanvas test in a worker:2d.composite.globalAlpha.canvas
// 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 = '#f00';
ctx2.fillRect(0, 0, 100, 50);
ctx.fillStyle = '#0f0';
ctx.fillRect(0, 0, 100, 50);
ctx.globalAlpha = 0.01; // avoid any potential alpha=0 optimisations
ctx.drawImage(offscreenCanvas2, 0, 0);
_assertPixelApprox(offscreenCanvas, 50,25, 2,253,0,255, "50,25", "2,253,0,255", 2);

t.done();

});
done();
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