https://github.com/web-platform-tests/wpt
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Tip revision: a160360fd9f39b7343c3da95f5ae7dbd8e0f47b8 authored by joysyu@google.com on 28 July 2017, 19:55:01 UTC
Overflow clipping on Row-spanning cells
Tip revision: a160360
2d.composite.uncovered.fill.destination-atop.worker.js
// DO NOT EDIT! This test has been generated by tools/gentest.py.
// OffscreenCanvas test in a worker:2d.composite.uncovered.fill.destination-atop
// Description:fill() 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("fill() 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, 0, 0.5)';
ctx.fillRect(0, 0, 100, 50);
ctx.globalCompositeOperation = 'destination-atop';
ctx.fillStyle = 'rgba(0, 0, 255, 0.75)';
ctx.translate(0, 25);
ctx.fillRect(0, 50, 100, 50);
_assertPixelApprox(offscreenCanvas, 50,25, 0,0,0,0, "50,25", "0,0,0,0", 5);

t.done();

});
done();
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