gecko/content/canvas/test/test_2d.imageData.object.round.html

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HTML

<!DOCTYPE HTML>
<title>Canvas test: 2d.imageData.object.round</title>
<!-- Testing: ImageData.data rounds numbers with convertToIntegerTiesToEven -->
<script src="/MochiKit/packed.js"></script>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" href="/tests/SimpleTest/test.css">
<body>
<canvas id="c" width="100" height="50"><p class="fallback">FAIL (fallback content)</p></canvas>
<script>
SimpleTest.waitForExplicitFinish();
MochiKit.DOM.addLoadEvent(function () {
var canvas = document.getElementById('c');
var ctx = canvas.getContext('2d');
var imgdata = ctx.getImageData(0, 0, 10, 10);
imgdata.data[0] = 0.499;
todo(imgdata.data[0] === 0, "imgdata.data[\""+(0)+"\"] === 0");
imgdata.data[0] = 0.5;
todo(imgdata.data[0] === 0, "imgdata.data[\""+(0)+"\"] === 0");
imgdata.data[0] = 0.501;
todo(imgdata.data[0] === 1, "imgdata.data[\""+(0)+"\"] === 1");
imgdata.data[0] = 1.499;
todo(imgdata.data[0] === 1, "imgdata.data[\""+(0)+"\"] === 1");
imgdata.data[0] = 1.5;
todo(imgdata.data[0] === 2, "imgdata.data[\""+(0)+"\"] === 2");
imgdata.data[0] = 1.501;
todo(imgdata.data[0] === 2, "imgdata.data[\""+(0)+"\"] === 2");
imgdata.data[0] = 2.5;
todo(imgdata.data[0] === 2, "imgdata.data[\""+(0)+"\"] === 2");
imgdata.data[0] = 3.5;
todo(imgdata.data[0] === 4, "imgdata.data[\""+(0)+"\"] === 4");
imgdata.data[0] = 252.5;
todo(imgdata.data[0] === 252, "imgdata.data[\""+(0)+"\"] === 252");
imgdata.data[0] = 253.5;
todo(imgdata.data[0] === 254, "imgdata.data[\""+(0)+"\"] === 254");
imgdata.data[0] = 254.5;
todo(imgdata.data[0] === 254, "imgdata.data[\""+(0)+"\"] === 254");
SimpleTest.finish();
});
</script>