html/canvas/element/wide-gamut-canvas/2d.color.space.p3.toBlob.with.putImageData.html

<!DOCTYPE html>
<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
<title>Canvas test: 2d.color.space.p3.toBlob.with.putImageData</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/html/canvas/resources/canvas-tests.js"></script>
<link rel="stylesheet" href="/html/canvas/resources/canvas-tests.css">
<body class="show_output">

<h1>2d.color.space.p3.toBlob.with.putImageData</h1>
<p class="desc">Use putImageData to put some p3 data in canvas and test if toBlob returns the same data</p>


<p class="output">Actual output:</p>
<canvas id="c" class="output" width="100" height="50"><p class="fallback">FAIL (fallback content)</p></canvas>

<ul id="d"></ul>
<script>
var t = async_test("Use putImageData to put some p3 data in canvas and test if toBlob returns the same data");
_addTest(function(canvas, ctx) {

  canvas.width = 2;
  canvas.height = 2;

  // Create an ImageData using createImageData and populate its data array.
  var image_data = ctx.createImageData(canvas.width, canvas.height, {colorSpace: "display-p3"});
  var color_data = [[255, 100, 150, 1.0], [255, 100, 150, 0.5],
                   [255, 100, 150, 0.5], [255, 100, 150, 0]];
  var data = image_data.data;
  for (var i = 0; i < data.length / 4; ++i) {
    data[4*i + 0] = color_data[i][0];
    data[4*i + 1] = color_data[i][1];
    data[4*i + 2] = color_data[i][2];
    data[4*i + 3] = color_data[i][3];
  }
  ctx.putImageData(image_data, 0, 0);
  expectedPixels = ctx.getImageData(0, 0, 2, 2, {colorSpace: "display-p3"}).data;

  var image = new Image();
  image.onload = t.step_func_done(function() {
      var dstCanvas = document.createElement("canvas");
      dstCanvas.width = 2;
      dstCanvas.height = 2;
      var ctx = dstCanvas.getContext('2d', {colorSpace: "display-p3"});
      ctx.drawImage(image, 0, 0);
      var actualPixels = ctx.getImageData(0, 0, 2, 2, {colorSpace: "display-p3"}).data;
      assert_array_approx_equals(actualPixels, expectedPixels, 2);
  });
  canvas.toBlob(function(blob) {
      var urlCreator = window.URL || window.webkitURL;
      image.src = urlCreator.createObjectURL(blob);
  }, 'image/png', 1);

}, {colorSpace: "display-p3"});
</script>