content/canvas/test/test_2d.gradient.radial.cone.shape2.html

   1 <!DOCTYPE HTML>
   2 <title>Canvas test: 2d.gradient.radial.cone.shape2</title>
   3 <script src="/MochiKit/MochiKit.js"></script>
   4 <script src="/tests/SimpleTest/SimpleTest.js"></script>
   5 <link rel="stylesheet" href="/tests/SimpleTest/test.css">
   6 <body>
   7 <canvas id="c" width="100" height="50"><p class="fallback">FAIL (fallback content)</p></canvas>
   8 <script>
   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 function todo_isPixel(ctx, x,y, r,g,b,a, pos, colour, d) {
  22     var pixel = ctx.getImageData(x, y, 1, 1);
  23     var pr = pixel.data[0],
  24         pg = pixel.data[1],
  25         pb = pixel.data[2],
  26         pa = pixel.data[3];
  27     todo(r-d <= pr && pr <= r+d &&
  28        g-d <= pg && pg <= g+d &&
  29        b-d <= pb && pb <= b+d &&
  30        a-d <= pa && pa <= a+d,
  31        "pixel "+pos+" is "+pr+","+pg+","+pb+","+pa+"; expected "+colour+" +/- "+d);
  32 }
  33
  34 SimpleTest.waitForExplicitFinish();
  35 addLoadEvent(function () {
  36
  37 var canvas = document.getElementById('c');
  38 var ctx = canvas.getContext('2d');
  39
  40 var tol = 1; // tolerance to avoid antialiasing artifacts
  41
  42 ctx.fillStyle = '#0f0';
  43 ctx.fillRect(0, 0, 100, 50);
  44
  45 var g = ctx.createRadialGradient(30+10*5/2, 40, 10*3/2, 30+10*15/4, 40, 10*9/4);
  46 g.addColorStop(0, '#f00');
  47 g.addColorStop(1, '#f00');
  48 ctx.fillStyle = g;
  49 ctx.fillRect(0, 0, 100, 50);
  50
  51 ctx.fillStyle = '#0f0';
  52 ctx.beginPath();
  53 ctx.moveTo(30-tol, 40);
  54 ctx.lineTo(110, -20-tol);
  55 ctx.lineTo(110, 100+tol);
  56 ctx.fill();
  57
  58 isPixel(ctx, 1,1, 0,255,0,255, "1,1", "0,255,0,255", 0);
  59 isPixel(ctx, 50,1, 0,255,0,255, "50,1", "0,255,0,255", 0);
  60 isPixel(ctx, 98,1, 0,255,0,255, "98,1", "0,255,0,255", 0);
  61 isPixel(ctx, 1,25, 0,255,0,255, "1,25", "0,255,0,255", 0);
  62 isPixel(ctx, 50,25, 0,255,0,255, "50,25", "0,255,0,255", 0);
  63 isPixel(ctx, 98,25, 0,255,0,255, "98,25", "0,255,0,255", 0);
  64 isPixel(ctx, 1,48, 0,255,0,255, "1,48", "0,255,0,255", 0);
  65 isPixel(ctx, 50,48, 0,255,0,255, "50,48", "0,255,0,255", 0);
  66 isPixel(ctx, 98,48, 0,255,0,255, "98,48", "0,255,0,255", 0);
  67
  68 SimpleTest.finish();
  69
  70 });
  71 </script>
  72