third_party/web_platform_tests/2dcontext/pixel-manipulation/2d.imageData.put.dirty.rect2.html

<!DOCTYPE html>
<!-- DO NOT EDIT! This test has been generated by tools/gentest.py. -->
<title>Canvas test: 2d.imageData.put.dirty.rect2</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/common/canvas-tests.js"></script>
<link rel="stylesheet" href="/common/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, "50,25", "0,255,0,255", 2);
_assertPixelApprox(canvas, 35,25, 0,255,0,255, "35,25", "0,255,0,255", 2);
_assertPixelApprox(canvas, 65,25, 0,255,0,255, "65,25", "0,255,0,255", 2);
_assertPixelApprox(canvas, 50,15, 0,255,0,255, "50,15", "0,255,0,255", 2);
_assertPixelApprox(canvas, 50,45, 0,255,0,255, "50,45", "0,255,0,255", 2);


});
</script>