<!DOCTYPE html>
<html>
<head>
<script src="../../resources/js-test-pre.js"></script>
</head>
<body>
<script>
description("Test the handling of non-integer source coordinates in getImageData().");

ctx = document.createElement('canvas').getContext('2d');

function dimensionsShouldBe(sx, sy, sw, sh, width, height)
{
    debug('getImageData(' + sx + ', ' + sy + ', ' + sw + ', ' + sh + ')');
    imageData = ctx.getImageData(sx, sy, sw, sh);
    shouldBe('imageData.width', width + '');
    shouldBe('imageData.height', height + '');
}

// Basic integer values
dimensionsShouldBe(   0,  0,   20,  10,     20, 10);

// Source point is not an integer
dimensionsShouldBe(  .1, .2,   20,  10,     20, 10);
dimensionsShouldBe(  .9, .8,   20,  10,     20, 10);

// Size is not an integer
dimensionsShouldBe(   0,  0, 19.9, 9.9,     19, 9);
dimensionsShouldBe(   0,  0, 19.1, 9.1,     19, 9);

// Width straddles a pixel boundary
dimensionsShouldBe(  .9,  0,   1.2,  10,      1, 10);

// Basic integer negative values
dimensionsShouldBe(  -1, -1,   20,  10,     20, 10);

// Non-integer negative values
dimensionsShouldBe(-1.1,  0,   20,  10,     20, 10);
dimensionsShouldBe(-1.9,  0,   20,  10,     20, 10);
</script>
<script src="../../resources/js-test-post.js"></script>
</body>
</html>
