<!DOCTYPE html>
<html>
<head>
<script src="../../resources/js-test.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)
{
imageData = ctx.getImageData(sx, sy, sw, sh);
debug('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, 21, 11);
dimensionsShouldBe( .9, .8, 20, 10, 21, 11);
// Size is not an integer
dimensionsShouldBe( 0, 0, 19.9, 9.9, 20, 10);
dimensionsShouldBe( 0, 0, 19.1, 9.1, 20, 10);
// Width straddles a pixel boundary
dimensionsShouldBe( .9, 0, .2, 10, 2, 10);
// Basic integer negative values
dimensionsShouldBe( -1, -1, 20, 10, 20, 10);
// Non-integer negative values
dimensionsShouldBe(-1.1, 0, 20, 10, 21, 10);
dimensionsShouldBe(-1.9, 0, 20, 10, 21, 10);
</script>
</body>
</html>