gecko/content/canvas/test/test_toDataURL.primarycolours.html

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<!DOCTYPE HTML>
<title>Canvas test: toDataURL.primarycolours</title>
<!-- Testing: toDataURL handles simple colours correctly -->
<script src="/MochiKit/MochiKit.js"></script>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" href="/tests/SimpleTest/test.css">
<body>
<canvas id="c" width="100" height="50"><p class="fallback">FAIL (fallback content)</p></canvas>
<script>
function isPixel(ctx, x,y, r,g,b,a, pos, colour, d) {
var pixel = ctx.getImageData(x, y, 1, 1);
var pr = pixel.data[0],
pg = pixel.data[1],
pb = pixel.data[2],
pa = pixel.data[3];
ok(r-d <= pr && pr <= r+d &&
g-d <= pg && pg <= g+d &&
b-d <= pb && pb <= b+d &&
a-d <= pa && pa <= a+d,
"pixel "+pos+" is "+pr+","+pg+","+pb+","+pa+"; expected "+colour+" +/- "+d);
}
function deferTest() {
_deferred = true;
}
function wrapFunction(f) {
return function () {
f.apply(null, arguments);
SimpleTest.finish();
}
}
SimpleTest.waitForExplicitFinish();
MochiKit.DOM.addLoadEvent(function () {
var canvas = document.getElementById('c');
var ctx = canvas.getContext('2d');
ctx.fillStyle = '#ff0';
ctx.fillRect(0, 0, 25, 40);
ctx.fillStyle = '#0ff';
ctx.fillRect(25, 0, 50, 40);
ctx.fillStyle = '#00f';
ctx.fillRect(75, 0, 25, 40);
ctx.fillStyle = '#fff';
ctx.fillRect(0, 40, 100, 10);
var data = canvas.toDataURL();
ctx.fillStyle = '#f00';
ctx.fillRect(0, 0, 100, 50);
var img = new Image();
deferTest();
img.onload = wrapFunction(function ()
{
ctx.drawImage(img, 0, 0);
netscape.security.PrivilegeManager.enablePrivilege('UniversalBrowserRead');
isPixel(ctx, 12,20, 255,255,0,255, "12,20", "255,255,0,255", 0);
isPixel(ctx, 50,20, 0,255,255,255, "50,20", "0,255,255,255", 0);
isPixel(ctx, 87,20, 0,0,255,255, "87,20", "0,0,255,255", 0);
isPixel(ctx, 50,45, 255,255,255,255, "50,45", "255,255,255,255", 0);
});
img.src = data;
});
</script>