2d.gradient.radial.cone.shape1.html

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This WPT test may be referenced by the following Test IDs:
- /html/canvas/offscreen/fill-and-stroke-styles/2d.gradient.radial.cone.shape1.html - WPT Dashboard Interop Dashboard

<!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.radial.cone.shape1</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.radial.cone.shape1</h1>

<p class="desc"></p>

<script>

var t = async_test("");

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');

  var tol = 1; // tolerance to avoid antialiasing artifacts

  ctx.fillStyle = '#0f0';

  ctx.fillRect(0, 0, 100, 50);

  ctx.fillStyle = '#f00';

  ctx.beginPath();

  ctx.moveTo(30+tol, 40);

  ctx.lineTo(110, -20+tol);

  ctx.lineTo(110, 100-tol);

  ctx.fill();

  var g = ctx.createRadialGradient(30+10*5/2, 40, 10*3/2, 30+10*15/4, 40, 10*9/4);

  g.addColorStop(0, '#0f0');

  g.addColorStop(1, '#0f0');

  ctx.fillStyle = g;

  ctx.fillRect(0, 0, 100, 50);

  _assertPixel(canvas, 1,1, 0,255,0,255);

  _assertPixel(canvas, 50,1, 0,255,0,255);

  _assertPixel(canvas, 98,1, 0,255,0,255);

  _assertPixel(canvas, 1,25, 0,255,0,255);

  _assertPixel(canvas, 50,25, 0,255,0,255);

  _assertPixelApprox(canvas, 98,25, 0,255,0,255, 1);

  _assertPixel(canvas, 1,48, 0,255,0,255);

  _assertPixelApprox(canvas, 50,48, 0,255,0,255, 1);

  _assertPixel(canvas, 98,48, 0,255,0,255);

  t.done();

});

</script>