<!DOCTYPE html>
<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
<title>OffscreenCanvas test: 2d.filter.canvasFilterObject.colorMatrix.tentative</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/html/canvas/resources/canvas-tests.js"></script>

<h1>2d.filter.canvasFilterObject.colorMatrix.tentative</h1>
<p class="desc">Test the functionality of ColorMatrix filters in CanvasFilter objects</p>


<script>
var t = async_test("Test the functionality of ColorMatrix filters in CanvasFilter objects");
var t_pass = t.done.bind(t);
var t_fail = t.step_func(function(reason) {
    throw reason;
});
t.step(function() {

  var canvas = new OffscreenCanvas(100, 50);
  var ctx = canvas.getContext('2d');

  assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'colorMatrix', values: undefined}); });
  assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'colorMatrix', values: 'foo'}); });
  assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'colorMatrix', values: null}); });
  assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'colorMatrix', values: [1, 2, 3]}); });
  assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'colorMatrix', values: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 'a']}); });
  assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'colorMatrix', values: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, Infinity]}); });
  ctx.fillStyle = '#f00';
  ctx.filter = new CanvasFilter({filter: 'colorMatrix', type: 'hueRotate', values: 0});
  ctx.fillRect(0, 0, 100, 50);
  _assertPixelApprox(canvas, 10,10, 255,0,0,255, 2);
  ctx.filter = new CanvasFilter({filter: 'colorMatrix', type: 'hueRotate', values: 90});
  ctx.fillRect(0, 0, 100, 50);
  _assertPixelApprox(canvas, 10,10, 0,91,0,255, 2);
  ctx.filter = new CanvasFilter({filter: 'colorMatrix', type: 'hueRotate', values: 180});
  ctx.fillRect(0, 0, 100, 50);
  _assertPixelApprox(canvas, 10,10, 0,109,109,255, 2);
  ctx.filter = new CanvasFilter({filter: 'colorMatrix', type: 'hueRotate', values: 270});
  ctx.fillRect(0, 0, 100, 50);
  _assertPixelApprox(canvas, 10,10, 109,18,255,255, 2);
  ctx.filter = new CanvasFilter({filter: 'colorMatrix', type: 'saturate', values: 0.5});
  ctx.fillRect(0, 0, 100, 50);
  _assertPixelApprox(canvas, 10,10, 155,27,27,255, 2);
  ctx.clearRect(0, 0, 100, 50);
  ctx.filter = new CanvasFilter({filter: 'colorMatrix', type: 'luminanceToAlpha'});
  ctx.fillRect(0, 0, 100, 50);
  _assertPixelApprox(canvas, 10,10, 0,0,0,54, 2);
  ctx.filter = new CanvasFilter({filter: 'colorMatrix', values: [
          0, 0, 0, 0, 0,
          1, 1, 1, 1, 0,
          0, 0, 0, 0, 0,
          0, 0, 0, 1, 0
  ]});
  ctx.fillRect(0, 0, 50, 25);
  ctx.fillStyle = '#0f0';
  ctx.fillRect(50, 0, 50, 25);
  ctx.fillStyle = '#00f';
  ctx.fillRect(0, 25, 50, 25);
  ctx.fillStyle = '#fff';
  ctx.fillRect(50, 25, 50, 25);
  _assertPixelApprox(canvas, 10,10, 0,255,0,255, 2);
  _assertPixelApprox(canvas, 60,10, 0,255,0,255, 2);
  _assertPixelApprox(canvas, 10,30, 0,255,0,255, 2);
  _assertPixelApprox(canvas, 60,30, 0,255,0,255, 2);
  t.done();

});
</script>
