content/canvas/test/test_2d.path.arc.scale.1.html

   1 <!DOCTYPE HTML>
   2 <title>Canvas test: 2d.path.arc.scale.1</title>
   3 <!-- Testing: Non-uniformly scaled arcs are the right shape -->
   4 <script src="/MochiKit/MochiKit.js"></script>
   5 <script src="/tests/SimpleTest/SimpleTest.js"></script>
   6 <link rel="stylesheet" href="/tests/SimpleTest/test.css">
   7 <body>
   8 <canvas id="c" width="100" height="50"><p class="fallback">FAIL (fallback content)</p></canvas>
   9 <script>
  10 function isPixel(ctx, x,y, r,g,b,a, pos, colour, d) {
  11     var pixel = ctx.getImageData(x, y, 1, 1);
  12     var pr = pixel.data[0],
  13         pg = pixel.data[1],
  14         pb = pixel.data[2],
  15         pa = pixel.data[3];
  16     ok(r-d <= pr && pr <= r+d &&
  17        g-d <= pg && pg <= g+d &&
  18        b-d <= pb && pb <= b+d &&
  19        a-d <= pa && pa <= a+d,
  20        "pixel "+pos+" is "+pr+","+pg+","+pb+","+pa+"; expected "+colour+" +/- "+d);
  21 }
  22
  23 SimpleTest.waitForExplicitFinish();
  24 MochiKit.DOM.addLoadEvent(function () {
  25
  26 var canvas = document.getElementById('c');
  27 var ctx = canvas.getContext('2d');
  28
  29 ctx.fillStyle = '#f00';
  30 ctx.fillRect(0, 0, 100, 50);
  31 ctx.scale(2, 0.5);
  32 ctx.fillStyle = '#0f0';
  33 ctx.beginPath();
  34 ctx.arc(25, 50, 56, 0, 2*Math.PI, false);
  35 ctx.fill();
  36 ctx.fillStyle = '#f00';
  37 ctx.beginPath();
  38 ctx.moveTo(-25, 50);
  39 ctx.arc(-25, 50, 24, 0, 2*Math.PI, false);
  40 ctx.moveTo(75, 50);
  41 ctx.arc(75, 50, 24, 0, 2*Math.PI, false);
  42 ctx.moveTo(25, -25);
  43 ctx.arc(25, -25, 24, 0, 2*Math.PI, false);
  44 ctx.moveTo(25, 125);
  45 ctx.arc(25, 125, 24, 0, 2*Math.PI, false);
  46 ctx.fill();
  47
  48 isPixel(ctx, 0,0, 0,255,0,255, "0,0", "0,255,0,255", 0);
  49 isPixel(ctx, 50,0, 0,255,0,255, "50,0", "0,255,0,255", 0);
  50 isPixel(ctx, 99,0, 0,255,0,255, "99,0", "0,255,0,255", 0);
  51 isPixel(ctx, 0,25, 0,255,0,255, "0,25", "0,255,0,255", 0);
  52 isPixel(ctx, 50,25, 0,255,0,255, "50,25", "0,255,0,255", 0);
  53 isPixel(ctx, 99,25, 0,255,0,255, "99,25", "0,255,0,255", 0);
  54 isPixel(ctx, 0,49, 0,255,0,255, "0,49", "0,255,0,255", 0);
  55 isPixel(ctx, 50,49, 0,255,0,255, "50,49", "0,255,0,255", 0);
  56 isPixel(ctx, 99,49, 0,255,0,255, "99,49", "0,255,0,255", 0);
  57
  58 SimpleTest.finish();
  59
  60 });
  61 </script>
  62