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image/svg+xml Conceptualsub-pixeloverlay Partially-transparentA and B OpaqueA and B α a α b A over B A in B A out B A atop B A xor B
image/svg+xml Conceptualsub-pixeloverlay Partially-transparentA and B OpaqueA and B α a α b A over B A in B A out B A atop B A xor B