This test exercises a bunch of color composition with alpha blending. The top-left rectangles are the source images and bottom-right rectangles are the destination images.
Tests for fill rect
src 255, 0, 0, 255 src 255, 0, 0, 255 src 255, 0, 0, 255 src 0, 255, 0, 0 src 0, 255, 0, 1 src 255, 0, 0, 0 src 255, 0, 0, 127 src 255, 0, 0, 255 src 255, 0, 0, 127 src 127, 0, 0, 255 src 127, 0, 0, 127 src 255, 0, 0, 127 src 255, 127, 0, 32 src 255, 0, 0, 191 src 255, 0, 255, 191
dst 0, 255, 0, 255 dst 0, 255, 0, 0 dst 0, 255, 0, 1 dst 255, 0, 0, 255 dst 255, 0, 0, 255 dst 0, 255, 0, 255 dst 0, 255, 0, 127 dst 0, 255, 0, 127 dst 0, 255, 0, 255 dst 0, 127, 0, 127 dst 0, 127, 0, 255 dst 255, 0, 0, 63 dst 255, 63, 0, 63 dst 0, 255, 0, 127 dst 0, 255, 255, 127
source-over
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source-in
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source-out
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source-atop
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destination-over
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destination-in
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destination-out
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destination-atop
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lighter
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copy
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xor
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Tests for path and fill
src 255, 0, 0, 255 src 255, 0, 0, 255 src 255, 0, 0, 255 src 0, 255, 0, 0 src 0, 255, 0, 1 src 255, 0, 0, 0 src 255, 0, 0, 127 src 255, 0, 0, 255 src 255, 0, 0, 127 src 127, 0, 0, 255 src 127, 0, 0, 127 src 255, 0, 0, 127 src 255, 127, 0, 32 src 255, 0, 0, 191 src 255, 0, 255, 191
dst 0, 255, 0, 255 dst 0, 255, 0, 0 dst 0, 255, 0, 1 dst 255, 0, 0, 255 dst 255, 0, 0, 255 dst 0, 255, 0, 255 dst 0, 255, 0, 127 dst 0, 255, 0, 127 dst 0, 255, 0, 255 dst 0, 127, 0, 127 dst 0, 127, 0, 255 dst 255, 0, 0, 63 dst 255, 63, 0, 63 dst 0, 255, 0, 127 dst 0, 255, 255, 127
source-over
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source-in
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source-out
PASS
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source-atop
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destination-over
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destination-in
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destination-out
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destination-atop
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lighter
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copy
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xor
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