I found this in the Metacard 2.5 documentation stack:

The ink property determines how the colors used to draw a control are combined 
with the colors of the of the pixels underneath that control.  A control's ink 
can be set to one of the following values: clear, srcAnd, srcAndReverse, 
srcCopy, notSrcAnd, noop, srcXor, srcOr, notSrcAndReverse, notSrcXor, reverse, 
srcOrReverse, notSrcCopy, notSrcOr, notSrcOrReverse, set, srcBic, notSrcBic, 
blend, addpin, addOver, subPin, transparent, addMax, subOver, or adMin.

The first 16 values are logical operations and are available on all platforms.  
They unfortunately don't allow predictable color combinations except on fixed 
colormap systems (16 and 24/32 bit display depths).  The last 10 are arithmetic 
modes only available on MacOS systems, and do allow reliable color combinations.

It just took a tiny, tiny bit of "oomf" to go and find it . . .

sincerely, Richmond Mathewson


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"Philosophical problems are confusions arising owing to the fluidity of 
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