dom/canvas/test/test_2d.gradient.radial.cone.front.html

   1 <!DOCTYPE HTML>
   2 <title>Canvas test: 2d.gradient.radial.cone.front</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 }
  20
  21 SimpleTest.waitForExplicitFinish();
  22 addLoadEvent(function () {
  23
  24 var canvas = document.getElementById('c');
  25 var ctx = canvas.getContext('2d');
  26
  27 ctx.fillStyle = '#f00';
  28 ctx.fillRect(0, 0, 100, 50);
  29
  30 var g = ctx.createRadialGradient(311, 25, 10, 210, 25, 100);
  31 g.addColorStop(0, '#f00');
  32 g.addColorStop(1, '#0f0');
  33 ctx.fillStyle = g;
  34 ctx.fillRect(0, 0, 100, 50);
  35
  36 isPixel(ctx, 1,1, 0,255,0,255, "1,1", "0,255,0,255", 0);
  37 isPixel(ctx, 50,1, 0,255,0,255, "50,1", "0,255,0,255", 0);
  38 isPixel(ctx, 98,1, 0,255,0,255, "98,1", "0,255,0,255", 0);
  39 isPixel(ctx, 1,25, 0,255,0,255, "1,25", "0,255,0,255", 0);
  40 isPixel(ctx, 50,25, 0,255,0,255, "50,25", "0,255,0,255", 0);
  41 isPixel(ctx, 98,25, 0,255,0,255, "98,25", "0,255,0,255", 0);
  42 isPixel(ctx, 1,48, 0,255,0,255, "1,48", "0,255,0,255", 0);
  43 isPixel(ctx, 50,48, 0,255,0,255, "50,48", "0,255,0,255", 0);
  44 isPixel(ctx, 98,48, 0,255,0,255, "98,48", "0,255,0,255", 0);
  45
  46 SimpleTest.finish();
  47
  48 });
  49 </script>
  50