dom/canvas/test/test_bug1567544.html

   1 <!DOCTYPE HTML>
   2 <!--
   3 https://bugzilla.mozilla.org/show_bug.cgi?id=1567544
   4
   5 Test that globalCompositeOperation is applied to SVG images drawn with `drawImage`.
   6 -->
   7 <title>Test for Bug 1567544</title>
   8 <script src="/tests/SimpleTest/SimpleTest.js"></script>
   9 <link rel="stylesheet" href="/tests/SimpleTest/test.css">
  10 <body>
  11 <canvas id="c" width="100" height="50"></canvas>
  12 <script>
  13 function isPixel(ctx, x,y, r,g,b,a, pos, colour, d) {
  14     var pixel = ctx.getImageData(x, y, 1, 1);
  15     var pr = pixel.data[0],
  16         pg = pixel.data[1],
  17         pb = pixel.data[2],
  18         pa = pixel.data[3];
  19     ok(r-d <= pr && pr <= r+d &&
  20        g-d <= pg && pg <= g+d &&
  21        b-d <= pb && pb <= b+d &&
  22        a-d <= pa && pa <= a+d,
  23        "pixel "+pos+" is "+pr+","+pg+","+pb+","+pa+"; expected "+colour+" +/- "+d);
  24 }
  25
  26 SimpleTest.waitForExplicitFinish();
  27 addLoadEvent(function () {
  28
  29 var canvas = document.getElementById('c');
  30 var ctx = canvas.getContext('2d');
  31
  32 ctx.beginPath();
  33 ctx.arc(50, 50, 37.5, 0, Math.PI * 2);
  34 ctx.fillStyle = 'red';
  35 ctx.fill();
  36 ctx.globalCompositeOperation = 'destination-in';
  37 ctx.drawImage(document.getElementById('roundrectangle.svg'), 50, 40);
  38
  39 isPixel(ctx, 82,38, 0,0,0,0, "82,38", "0,0,0,0", 0);
  40 isPixel(ctx, 82,48, 255,0,0,255, "82,48", "255,0,0,255", 0);
  41
  42 SimpleTest.finish();
  43
  44 });
  45 </script>
  46 <img src="image_roundrectangle.svg" id="roundrectangle.svg" class="resource">