Overview

Module

Use

Devguide

Index

Values

Values' Details

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enum CompositeOp

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Values
clear	Clear destination. Fa = Fb = 0.
src	Copy source as-is to destination. Fa = 1, Fb = 0.
dst	Leave destination as-is. Fa = 0, Fb = 1.
over	Copy source over destination. Fa = 1, Fb = 1-Aa.
under	Copy source under destination. Fa = 1-Ab, Fb = 1.
inside	Copy source to destination, but limited to where the destination is. Fa = Ab, Fb = 0.
inReverse	Leave destination as is, but only where source was. Fa = 0, Fb = Aa.
outside	Copy source to destination, but limited to where destination is not. Fa = 1-Ab, Fb = 0.
outReverse	Leave destination as is, but only where source has not been. Fa = 0, Fb = 1-Aa.
atop	Copy source over destination, but only where destination is. Keep destination. Fa = Ab, Fb = 1-Aa.
atopReverse	Copy destination over source, but only where source is. Keep source. Fa = 1-Ab, Fb = Aa.
xor	Take only parts where either source or destination, but not both are. Fa = 1-Ab, Fb = 1-Aa.
add	simply add contributions of both source and destination. The resulting color values are limited to the permissible color range, and clipped to the maximal value, if exceeded. Fa = 1, Fb = 1.
saturate	Fa = min(1,(1-Ab)/Aa), Fb = 1

Values' Details

clear clear, Description Clear destination. Fa = Fb = 0.

src src, Description Copy source as-is to destination. Fa = 1, Fb = 0.

dst dst, Description Leave destination as-is. Fa = 0, Fb = 1.

over over, Description Copy source over destination. Fa = 1, Fb = 1-Aa.

under under, Description Copy source under destination. Fa = 1-Ab, Fb = 1.

inside inside, Description Copy source to destination, but limited to where the destination is. Fa = Ab, Fb = 0.

inReverse inReverse, Description Leave destination as is, but only where source was. Fa = 0, Fb = Aa.

outside outside, Description Copy source to destination, but limited to where destination is not. Fa = 1-Ab, Fb = 0.

outReverse outReverse, Description Leave destination as is, but only where source has not been. Fa = 0, Fb = 1-Aa.

atop atop, Description Copy source over destination, but only where destination is. Keep destination. Fa = Ab, Fb = 1-Aa.

atopReverse atopReverse, Description Copy destination over source, but only where source is. Keep source. Fa = 1-Ab, Fb = Aa.

xor xor, Description Take only parts where either source or destination, but not both are. Fa = 1-Ab, Fb = 1-Aa.

add add, Description simply add contributions of both source and destination. The resulting color values are limited to the permissible color range, and clipped to the maximal value, if exceeded. Fa = 1, Fb = 1.

saturate saturate, Description Fa = min(1,(1-Ab)/Aa), Fb = 1

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Copyright © 2003 Sun Microsystems, Inc.