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

   1 <!DOCTYPE HTML>
   2 <title>Canvas test: 2d.gradient.radial.cone.top</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
   9 function isPixel(ctx, x,y, r,g,b,a, pos, colour, d) {
  10     var pixel = ctx.getImageData(x, y, 1, 1);
  11     var pr = pixel.data[0],
  12         pg = pixel.data[1],
  13         pb = pixel.data[2],
  14         pa = pixel.data[3];
  15     ok(r-d <= pr && pr <= r+d &&
  16        g-d <= pg && pg <= g+d &&
  17        b-d <= pb && pb <= b+d &&
  18        a-d <= pa && pa <= a+d,
  19        "pixel "+pos+" is "+pr+","+pg+","+pb+","+pa+"; expected "+colour+" +/- "+d);
  20 }
  21
  22 function todo_isPixel(ctx, x,y, r,g,b,a, pos, colour, d) {
  23     var pixel = ctx.getImageData(x, y, 1, 1);
  24     var pr = pixel.data[0],
  25         pg = pixel.data[1],
  26         pb = pixel.data[2],
  27         pa = pixel.data[3];
  28     todo(r-d <= pr && pr <= r+d &&
  29          g-d <= pg && pg <= g+d &&
  30          b-d <= pb && pb <= b+d &&
  31          a-d <= pa && pa <= a+d,
  32          "pixel "+pos+" is "+pr+","+pg+","+pb+","+pa+"; expected "+colour+" +/- "+d);
  33 }
  34
  35 SimpleTest.waitForExplicitFinish();
  36 addLoadEvent(function () {
  37
  38 var canvas = document.getElementById('c');
  39 var ctx = canvas.getContext('2d');
  40
  41 ctx.fillStyle = '#f00';
  42 ctx.fillRect(0, 0, 100, 50);
  43
  44 var g = ctx.createRadialGradient(230, 25, 100, 100, 25, 101);
  45 g.addColorStop(0, '#f00');
  46 g.addColorStop(1, '#0f0');
  47 ctx.fillStyle = g;
  48 ctx.fillRect(0, 0, 100, 50);
  49
  50 isPixel(ctx, 1,1, 0,255,0,255, "1,1", "0,255,0,255", 0);
  51 isPixel(ctx, 50,1, 0,255,0,255, "50,1", "0,255,0,255", 0);
  52 isPixel(ctx, 98,1, 0,255,0,255, "98,1", "0,255,0,255", 0);
  53 isPixel(ctx, 1,25, 0,255,0,255, "1,25", "0,255,0,255", 0);
  54 isPixel(ctx, 50,25, 0,255,0,255, "50,25", "0,255,0,255", 0);
  55 isPixel(ctx, 98,25, 0,255,0,255, "98,25", "0,255,0,255", 0);
  56 isPixel(ctx, 1,48, 0,255,0,255, "1,48", "0,255,0,255", 0);
  57 isPixel(ctx, 50,48, 0,255,0,255, "50,48", "0,255,0,255", 0);
  58 isPixel(ctx, 98,48, 0,255,0,255, "98,48", "0,255,0,255", 0);
  59
  60 SimpleTest.finish();
  61
  62 });
  63 </script>
  64