Content - b555c653067bf82d2c467d4cf06b4a09db90cc22 - 5af1b22/offscreen-canvas/compositing/2d.composite.uncovered.nocontext.source-out.html

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Tip revision: 58c02cddac41bd8027ce5b31ace82ab47e13d89b authored by Darren Shen on 26 February 2018, 19:13:50 UTC
[css-typed-om] Make custom paint canvas work with <gradient>s.

Tip revision: 58c02cd

2d.composite.uncovered.nocontext.source-out.html

<!DOCTYPE html>
<!-- DO NOT EDIT! This test has been generated by tools/gentest.py. -->
<title>OffscreenCanvas test: 2d.composite.uncovered.nocontext.source-out</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/common/canvas-tests.js"></script>

<h1>2d.composite.uncovered.nocontext.source-out</h1>
<p class="desc">drawImage() of a canvas with no context draws pixels as (0,0,0,0), and does not leave the pixels unchanged.</p>


<script>
var t = async_test("drawImage() of a canvas with no context draws pixels 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 = 'source-out';
var offscreenCanvas2 = new OffscreenCanvas(100, 50);
ctx.drawImage(offscreenCanvas2, 0, 0);
_assertPixelApprox(offscreenCanvas, 50,25, 0,0,0,0, "50,25", "0,0,0,0", 5);

t.done();

});
</script>

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