File: 2d.gradient.conic.negative.rotation.html

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<!DOCTYPE html>
<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
<meta charset="UTF-8">
<title>OffscreenCanvas test: 2d.gradient.conic.negative.rotation</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/html/canvas/resources/canvas-tests.js"></script>

<h1>2d.gradient.conic.negative.rotation</h1>
<p class="desc">Conic gradient with negative rotation</p>


<script>
var t = async_test("Conic gradient with negative rotation");
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');

  const g = ctx.createConicGradient(-Math.PI/2, 50, 25);
  // It's red in the upper right region and green on the lower left region
  g.addColorStop(0, "#f00");
  g.addColorStop(0.25, "#0f0");
  g.addColorStop(0.50, "#0f0");
  g.addColorStop(0.75, "#f00");
  ctx.fillStyle = g;
  ctx.fillRect(0, 0, 100, 50);
  _assertPixelApprox(canvas, 25,15, 255,0,0,255, 3);
  _assertPixelApprox(canvas, 75,40, 0,255,0,255, 3);
  t.done();

});
</script>