2
<title>Canvas test: 2d.composite.image.destination-in</title>
3
<script src="/MochiKit/MochiKit.js"></script>
4
<script src="/tests/SimpleTest/SimpleTest.js"></script>
5
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css">
7
<canvas id="c" width="100" height="50"><p class="fallback">FAIL (fallback content)</p></canvas>
10
function isPixel(ctx, x,y, r,g,b,a, pos, colour, d, f) {
11
var pixel = ctx.getImageData(x, y, 1, 1);
12
var pr = pixel.data[0],
16
(f || ok)(r-d <= pr && pr <= r+d &&
17
g-d <= pg && pg <= g+d &&
18
b-d <= pb && pb <= b+d &&
19
a-d <= pa && pa <= a+d,
20
"pixel "+pos+" is "+pr+","+pg+","+pb+","+pa+"; expected "+colour+" +/- "+d);
23
SimpleTest.waitForExplicitFinish();
24
MochiKit.DOM.addLoadEvent(function () {
26
var canvas = document.getElementById('c');
27
var ctx = canvas.getContext('2d');
30
ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
31
ctx.fillRect(0, 0, 100, 50);
32
ctx.globalCompositeOperation = 'destination-in';
33
ctx.drawImage(document.getElementById('yellow75.png'), 0, 0);
34
isPixel(ctx, 50,25, 0,255,255,95, "50,25", "0,255,255,95", 5);
36
if (!_deferred) SimpleTest.finish();
39
<img src="image_yellow75.png" id="yellow75.png" class="resource">