testing/web-platform/tests/html/semantics/embedded-content/the-canvas-element/toDataURL.jpeg.primarycolours.html

   1 <!DOCTYPE html>
   2 <!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
   3 <title>Canvas test: toDataURL.jpeg.primarycolours</title>
   4 <script src="/resources/testharness.js"></script>
   5 <script src="/resources/testharnessreport.js"></script>
   6 <script src="/html/canvas/resources/canvas-tests.js"></script>
   7 <link rel="stylesheet" href="/html/canvas/resources/canvas-tests.css">
   8 <body class="show_output">
   9
  10 <h1>toDataURL.jpeg.primarycolours</h1>
  11 <p class="desc">toDataURL with JPEG handles simple colours correctly</p>
  12
  13
  14 <p class="output">Actual output:</p>
  15 <canvas id="c" class="output" width="100" height="50"><p class="fallback">FAIL (fallback content)</p></canvas>
  16 <p class="output expectedtext">Expected output:<p><img src="toDataURL.jpeg.primarycolours.png" class="output expected" id="expected" alt="">
  17 <ul id="d"></ul>
  18 <script>
  19 var t = async_test("toDataURL with JPEG handles simple colours correctly");
  20 _addTest(function(canvas, ctx) {
  21
  22 ctx.fillStyle = '#ff0';
  23 ctx.fillRect(0, 0, 25, 40);
  24 ctx.fillStyle = '#0ff';
  25 ctx.fillRect(25, 0, 50, 40);
  26 ctx.fillStyle = '#00f';
  27 ctx.fillRect(75, 0, 25, 40);
  28 ctx.fillStyle = '#fff';
  29 ctx.fillRect(0, 40, 100, 10);
  30 var data = canvas.toDataURL('image/jpeg'); // it is okay if this returns a PNG instead
  31 ctx.fillStyle = '#f00';
  32 ctx.fillRect(0, 0, 100, 50);
  33 var img = new Image();
  34 deferTest();
  35 img.onload = t.step_func_done(function ()
  36 {
  37     ctx.drawImage(img, 0, 0);
  38     _assertPixelApprox(canvas, 12,20, 255,255,0,255, 8);
  39     _assertPixelApprox(canvas, 50,20, 0,255,255,255, 8);
  40     _assertPixelApprox(canvas, 87,20, 0,0,255,255, 8);
  41     _assertPixelApprox(canvas, 50,45, 255,255,255,255, 8);
  42 });
  43 img.src = data;
  44
  45
  46 });
  47 </script>