44 lines
1.3 KiB
HTML
44 lines
1.3 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<script src="../../resources/js-test-pre.js"></script>
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</head>
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<body>
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<script>
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description("Test the handling of non-integer source coordinates in getImageData().");
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ctx = document.createElement('canvas').getContext('2d');
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function dimensionsShouldBe(sx, sy, sw, sh, width, height)
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{
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debug('getImageData(' + sx + ', ' + sy + ', ' + sw + ', ' + sh + ')');
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imageData = ctx.getImageData(sx, sy, sw, sh);
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shouldBe('imageData.width', width + '');
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shouldBe('imageData.height', height + '');
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}
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// Basic integer values
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dimensionsShouldBe( 0, 0, 20, 10, 20, 10);
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// Source point is not an integer
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dimensionsShouldBe( .1, .2, 20, 10, 20, 10);
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dimensionsShouldBe( .9, .8, 20, 10, 20, 10);
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// Size is not an integer
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dimensionsShouldBe( 0, 0, 19.9, 9.9, 19, 9);
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dimensionsShouldBe( 0, 0, 19.1, 9.1, 19, 9);
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// Width straddles a pixel boundary
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dimensionsShouldBe( .9, 0, 1.2, 10, 1, 10);
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// Basic integer negative values
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dimensionsShouldBe( -1, -1, 20, 10, 20, 10);
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// Non-integer negative values
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dimensionsShouldBe(-1.1, 0, 20, 10, 20, 10);
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dimensionsShouldBe(-1.9, 0, 20, 10, 20, 10);
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</script>
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<script src="../../resources/js-test-post.js"></script>
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</body>
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</html>
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