/
2d.composite.uncovered.nocontext.destination-in.html
38 lines (30 loc) · 1.66 KB
/
2d.composite.uncovered.nocontext.destination-in.html
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
<!DOCTYPE html>
<title>Canvas test: 2d.composite.uncovered.nocontext.destination-in</title>
<meta name="author" content="Philip Taylor">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="../../../common/canvas-tests.js"></script>
<link rel="stylesheet" href="../../../common/canvas-tests.css">
<body class="show_output">
<h1><a href="index.2d.html">2d</a>.<a href="index.2d.composite.html">composite</a>.<a href="index.2d.composite.uncovered.html">uncovered</a>.<a href="index.2d.composite.uncovered.nocontext.html">nocontext</a>.destination-in</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>
<div class="refs">Spec references:
<ul>
<li><a href="../annotated-spec/canvas.html#testrefs.2d.composite.destination-in">2d.composite.destination-in</a>
</ul>
</div>
<p class="output">Actual output:</p>
<canvas id="c" class="output" width="100" height="50"><p class="fallback">FAIL (fallback content)</p></canvas>
<p class="output expectedtext">Expected output:<p><img src="2d.composite.uncovered.nocontext.destination-in.png" class="output expected" id="expected" alt="">
<ul id="d"></ul>
<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.");
_addTest(function(canvas, ctx) {
ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
ctx.fillRect(0, 0, 100, 50);
ctx.globalCompositeOperation = 'destination-in';
var canvas2 = document.createElement('canvas');
ctx.drawImage(canvas2, 0, 0);
_assertPixelApprox(canvas, 50,25, 0,0,0,0, "50,25", "0,0,0,0", 5);
});
</script>