content/canvas/test/test_2d.line.join.round.html

   1 <!DOCTYPE HTML>
   2 <title>Canvas test: 2d.line.join.round</title>
   3 <!-- Testing: lineJoin 'round' is rendered correctly -->
   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 = '#0f0';
  30 ctx.fillRect(0, 0, 100, 50);
  31
  32 var tol = 1; // tolerance to avoid antialiasing artifacts
  33
  34 ctx.lineJoin = 'round';
  35 ctx.lineWidth = 20;
  36
  37 ctx.fillStyle = '#f00';
  38 ctx.strokeStyle = '#0f0';
  39
  40 ctx.fillRect(10, 10, 20, 20);
  41 ctx.fillRect(20, 20, 20, 20);
  42 ctx.beginPath();
  43 ctx.moveTo(30, 20);
  44 ctx.arc(30, 20, 10-tol, 0, 2*Math.PI, true);
  45 ctx.fill();
  46
  47 ctx.beginPath();
  48 ctx.moveTo(10, 20);
  49 ctx.lineTo(30, 20);
  50 ctx.lineTo(30, 40);
  51 ctx.stroke();
  52
  53
  54 ctx.fillStyle = '#0f0';
  55 ctx.strokeStyle = '#f00';
  56
  57 ctx.beginPath();
  58 ctx.moveTo(60, 20);
  59 ctx.lineTo(80, 20);
  60 ctx.lineTo(80, 40);
  61 ctx.stroke();
  62
  63 ctx.fillRect(60, 10, 20, 20);
  64 ctx.fillRect(70, 20, 20, 20);
  65 ctx.beginPath();
  66 ctx.moveTo(80, 20);
  67 ctx.arc(80, 20, 10+tol, 0, 2*Math.PI, true);
  68 ctx.fill();
  69
  70 isPixel(ctx, 36,14, 0,255,0,255, "36,14", "0,255,0,255", 0);
  71 isPixel(ctx, 36,13, 0,255,0,255, "36,13", "0,255,0,255", 0);
  72 isPixel(ctx, 37,13, 0,255,0,255, "37,13", "0,255,0,255", 0);
  73 isPixel(ctx, 38,13, 0,255,0,255, "38,13", "0,255,0,255", 0);
  74 isPixel(ctx, 38,12, 0,255,0,255, "38,12", "0,255,0,255", 0);
  75
  76 isPixel(ctx, 86,14, 0,255,0,255, "86,14", "0,255,0,255", 0);
  77 isPixel(ctx, 86,13, 0,255,0,255, "86,13", "0,255,0,255", 0);
  78 isPixel(ctx, 87,13, 0,255,0,255, "87,13", "0,255,0,255", 0);
  79 isPixel(ctx, 88,13, 0,255,0,255, "88,13", "0,255,0,255", 0);
  80 isPixel(ctx, 88,12, 0,255,0,255, "88,12", "0,255,0,255", 0);
  81
  82 SimpleTest.finish();
  83
  84 });
  85 </script>
  86