testing/web-platform/tests/html/canvas/element/pixel-manipulation/2d.imageData.get.nonpremul.html

   1 <!DOCTYPE html>
   2 <!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
   3 <title>Canvas test: 2d.imageData.get.nonpremul</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>2d.imageData.get.nonpremul</h1>
  11 <p class="desc">getImageData() returns non-premultiplied colors</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
  17 <ul id="d"></ul>
  18 <script>
  19 var t = async_test("getImageData() returns non-premultiplied colors");
  20 _addTest(function(canvas, ctx) {
  21
  22 ctx.fillStyle = 'rgba(255, 255, 255, 0.5)';
  23 ctx.fillRect(0, 0, 100, 50);
  24 var imgdata = ctx.getImageData(10, 10, 10, 10);
  25 _assert(imgdata.data[0] > 200, "imgdata.data[\""+(0)+"\"] > 200");
  26 _assert(imgdata.data[1] > 200, "imgdata.data[\""+(1)+"\"] > 200");
  27 _assert(imgdata.data[2] > 200, "imgdata.data[\""+(2)+"\"] > 200");
  28 _assert(imgdata.data[3] > 100, "imgdata.data[\""+(3)+"\"] > 100");
  29 _assert(imgdata.data[3] < 200, "imgdata.data[\""+(3)+"\"] < 200");
  30
  31
  32 });
  33 </script>
  34