2d.imageData.get.unaffected.html

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This WPT test may be referenced by the following Test IDs:
- /html/canvas/offscreen/pixel-manipulation/2d.imageData.get.unaffected.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.imageData.get.unaffected</title>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script src="/html/canvas/resources/canvas-tests.js"></script>

<h1>2d.imageData.get.unaffected</h1>

<p class="desc">getImageData() is not affected by context state</p>

<script>

var t = async_test("getImageData() is not affected by context state");

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');

  ctx.fillStyle = '#0f0';

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

  ctx.fillStyle = '#f00';

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

  ctx.save();

  ctx.translate(50, 0);

  ctx.globalAlpha = 0.1;

  ctx.globalCompositeOperation = 'destination-atop';

  ctx.shadowColor = '#f00';

  ctx.rect(0, 0, 5, 5);

  ctx.clip();

  var imgdata = ctx.getImageData(0, 0, 50, 50);

  ctx.restore();

  ctx.putImageData(imgdata, 50, 0);

  _assertPixelApprox(canvas, 25,25, 0,255,0,255, 2);

  _assertPixelApprox(canvas, 75,25, 0,255,0,255, 2);

  t.done();

});

</script>