2d.imageData.get.rounding.html

Enable keyboard shortcuts

This WPT test may be referenced by the following Test IDs:
- /html/canvas/element/pixel-manipulation/2d.imageData.get.rounding.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->

<title>Canvas test: 2d.imageData.get.rounding</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.get.rounding</h1>

<p class="desc">Test the handling of non-integer source coordinates in getImageData().</p>

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

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

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

<script>

var t = async_test("Test the handling of non-integer source coordinates in getImageData().");

_addTest(function(canvas, ctx) {

  function testDimensions(sx, sy, sw, sh, width, height)

      imageData = ctx.getImageData(sx, sy, sw, sh);

      _assert(imageData.width == width, "imageData.width == width");

      _assert(imageData.height == height, "imageData.height == height");

  testDimensions(0, 0, 20, 10, 20, 10);

  testDimensions(.1, .2, 20, 10, 20, 10);

  testDimensions(.9, .8, 20, 10, 20, 10);

  testDimensions(0, 0, 20.9, 10.9, 20, 10);

  testDimensions(0, 0, 20.1, 10.1, 20, 10);

  testDimensions(-1, -1, 20, 10, 20, 10);

  testDimensions(-1.1, 0, 20, 10, 20, 10);

  testDimensions(-1.9,  0, 20, 10, 20, 10);

});

</script>