content/canvas/test/test_2d.fillText.gradient.html@6474c204b198
content/canvas/test/test_2d.fillText.gradient.html
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
1 <!DOCTYPE HTML>
2 <title>Canvas test: 2d.composite.canvas.xor</title>
3 <script src="/tests/SimpleTest/SimpleTest.js"></script>
4 <link rel="stylesheet" href="/tests/SimpleTest/test.css">
5 <body>
6 <canvas id="c" width="100" height="50"><p class="fallback">FAIL (fallback content)</p></canvas>
7 <script>
8 function isPixel(ctx, x,y, r,g,b,a, pos, colour, d) {
9 var pixel = ctx.getImageData(x, y, 1, 1);
10 var pr = pixel.data[0],
11 pg = pixel.data[1],
12 pb = pixel.data[2],
13 pa = pixel.data[3];
14 ok(r-d <= pr && pr <= r+d &&
15 g-d <= pg && pg <= g+d &&
16 b-d <= pb && pb <= b+d &&
17 a-d <= pa && pa <= a+d,
18 "pixel "+pos+" is "+pr+","+pg+","+pb+","+pa+"; expected "+colour+" +/- "+d);
19 }
21 SimpleTest.waitForExplicitFinish();
22 addLoadEvent(function () {
24 var canvas = document.getElementById('c');
25 var ctx = canvas.getContext('2d');
26 var text = "I";
27 var colorTop = 'rgba(255,0,0,1)';
28 var colorBottom = 'rgba(0,255,0,1)';
29 var inset = 10;
30 var grad = ctx.createLinearGradient(inset, inset, inset, inset + 30);
32 // add color stops
33 grad.addColorStop(0, colorTop);
34 grad.addColorStop(1, colorBottom);
36 ctx.fillStyle = grad;
37 ctx.textBaseline = 'top';
38 ctx.font = '110px sans-serif'
39 ctx.fillText(text, -10, -20);
40 ctx.fillText(text, -8, -20);
41 ctx.fillText(text, -6, -20);
42 ctx.fillText(text, -4, -20);
43 ctx.fillText(text, -2, -20);
44 ctx.fillText(text, 0, -20);
45 ctx.fillText(text, 2, -20);
46 ctx.fillText(text, 4, -20);
47 ctx.fillText(text, 6, -20);
49 isPixel(ctx, 15,0, 255,0,0,255, "15,0", "255,0,0,255", 5);
50 isPixel(ctx, 15,49, 0,255,0,255, "15,49", "0,255,0,255", 5);
51 SimpleTest.finish();
53 });
54 </script>
