dom/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="/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 function todo_isPixel(ctx, x,y, r,g,b,a, pos, colour, d) {
  21     var pixel = ctx.getImageData(x, y, 1, 1);
  22     var pr = pixel.data[0],
  23         pg = pixel.data[1],
  24         pb = pixel.data[2],
  25         pa = pixel.data[3];
  26     todo(r-d <= pr && pr <= r+d &&
  27        g-d <= pg && pg <= g+d &&
  28        b-d <= pb && pb <= b+d &&
  29        a-d <= pa && pa <= a+d,
  30        "pixel "+pos+" is "+pr+","+pg+","+pb+","+pa+"; expected "+colour+" +/- "+d);
  31 }
  32
  33 SimpleTest.waitForExplicitFinish();
  34 addLoadEvent(function () {
  35
  36 var canvas = document.getElementById('c');
  37 var ctx = canvas.getContext('2d');
  38
  39 var tol = 1; // tolerance to avoid antialiasing artifacts
  40
  41 ctx.fillStyle = '#0f0';
  42 ctx.fillRect(0, 0, 100, 50);
  43
  44 var g = ctx.createRadialGradient(30+10*5/2, 40, 10*3/2, 30+10*15/4, 40, 10*9/4);
  45 g.addColorStop(0, '#f00');
  46 g.addColorStop(1, '#f00');
  47 ctx.fillStyle = g;
  48 ctx.fillRect(0, 0, 100, 50);
  49
  50 ctx.fillStyle = '#0f0';
  51 ctx.beginPath();
  52 ctx.moveTo(30-tol, 40);
  53 ctx.lineTo(110, -20-tol);
  54 ctx.lineTo(110, 100+tol);
  55 ctx.fill();
  56
  57 isPixel(ctx, 1,1, 0,255,0,255, "1,1", "0,255,0,255", 0);
  58 isPixel(ctx, 50,1, 0,255,0,255, "50,1", "0,255,0,255", 0);
  59 isPixel(ctx, 98,1, 0,255,0,255, "98,1", "0,255,0,255", 0);
  60 isPixel(ctx, 1,25, 0,255,0,255, "1,25", "0,255,0,255", 0);
  61 isPixel(ctx, 50,25, 0,255,0,255, "50,25", "0,255,0,255", 0);
  62 isPixel(ctx, 98,25, 0,255,0,255, "98,25", "0,255,0,255", 0);
  63 isPixel(ctx, 1,48, 0,255,0,255, "1,48", "0,255,0,255", 0);
  64 isPixel(ctx, 50,48, 0,255,0,255, "50,48", "0,255,0,255", 0);
  65 isPixel(ctx, 98,48, 0,255,0,255, "98,48", "0,255,0,255", 0);
  66
  67 SimpleTest.finish();
  68
  69 });
  70 </script>
  71