2d.imageData.put.dirty.rect2.html

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This WPT test may be referenced by the following Test IDs:
- /html/canvas/element/pixel-manipulation/2d.imageData.put.dirty.rect2.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>Canvas test: 2d.imageData.put.dirty.rect2</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.imageData.put.dirty.rect2</h1>

<p class="desc">putImageData() only modifies areas inside the dirty rectangle, using x and y</p>

<p class="output">Actual output:</p>

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

<p class="output expectedtext">Expected output:<p><img src="/images/green-100x50.png" class="output expected" id="expected" alt="">

<ul id="d"></ul>

<script>

var t = async_test("putImageData() only modifies areas inside the dirty rectangle, using x and y");

_addTest(function(canvas, ctx) {

  ctx.fillStyle = '#f00';

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

  ctx.fillStyle = '#0f0';

  ctx.fillRect(60, 30, 20, 20)

  var imgdata = ctx.getImageData(0, 0, 100, 50);

  ctx.fillStyle = '#0f0';

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

  ctx.fillStyle = '#f00';

  ctx.fillRect(40, 20, 20, 20)

  ctx.putImageData(imgdata, -20, -10, 60, 30, 20, 20);

  _assertPixelApprox(canvas, 50,25, 0,255,0,255, 2);

  _assertPixelApprox(canvas, 35,25, 0,255,0,255, 2);

  _assertPixelApprox(canvas, 65,25, 0,255,0,255, 2);

  _assertPixelApprox(canvas, 50,15, 0,255,0,255, 2);

  _assertPixelApprox(canvas, 50,45, 0,255,0,255, 2);

});

</script>