content/canvas/test/test_2d.gradient.radial.cone.shape1.html

   1 <!DOCTYPE HTML>
   2 <title>Canvas test: 2d.gradient.radial.cone.shape1</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
  22 SimpleTest.waitForExplicitFinish();
  23 MochiKit.DOM.addLoadEvent(function () {
  24
  25 var canvas = document.getElementById('c');
  26 var ctx = canvas.getContext('2d');
  27
  28 var tol = 1; // tolerance to avoid antialiasing artifacts
  29
  30 ctx.fillStyle = '#0f0';
  31 ctx.fillRect(0, 0, 100, 50);
  32
  33 ctx.fillStyle = '#f00';
  34 ctx.beginPath();
  35 ctx.moveTo(30+tol, 40);
  36 ctx.lineTo(110, -20+tol);
  37 ctx.lineTo(110, 100-tol);
  38 ctx.fill();
  39
  40 var g = ctx.createRadialGradient(30+10*5/2, 40, 10*3/2, 30+10*15/4, 40, 10*9/4);
  41 g.addColorStop(0, '#0f0');
  42 g.addColorStop(1, '#0f0');
  43 ctx.fillStyle = g;
  44 ctx.fillRect(0, 0, 100, 50);
  45
  46 isPixel(ctx, 1,1, 0,255,0,255, "1,1", "0,255,0,255", 0);
  47 isPixel(ctx, 50,1, 0,255,0,255, "50,1", "0,255,0,255", 0);
  48 isPixel(ctx, 98,1, 0,255,0,255, "98,1", "0,255,0,255", 0);
  49 isPixel(ctx, 1,25, 0,255,0,255, "1,25", "0,255,0,255", 0);
  50 isPixel(ctx, 50,25, 0,255,0,255, "50,25", "0,255,0,255", 0);
  51 isPixel(ctx, 98,25, 0,255,0,255, "98,25", "0,255,0,255", 0);
  52 isPixel(ctx, 1,48, 0,255,0,255, "1,48", "0,255,0,255", 0);
  53 isPixel(ctx, 50,48, 0,255,0,255, "50,48", "0,255,0,255", 0);
  54 isPixel(ctx, 98,48, 0,255,0,255, "98,48", "0,255,0,255", 0);
  55
  56 SimpleTest.finish();
  57
  58 });
  59 </script>
  60