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Logical

MIN:

[min(Sa, Da), MIN(Sc, Dc)]

MAX:

[max(Sa, Da), MAX(Sc, Dc)]

LIGHTEN:

[Sa + Da - Sa×Da, Sc×(1 - Da) + Dc×(1 - Sa) + max(Sc×Da, Dc×Sa)]

DARKEN:

[Sa + Da - Sa×Da, Sc×(1 - Da) + Dc×(1 - Sa) + min(Sc×Da, Dc×Sa)]

AND:

[Sa×Da, Sc×Dc]

OR:

[Sa + Da - Sa×Da, Sc + Dc - Sc×Dc]

XOR:

[Sa + Da - 2×Sa×Da, Sc×(1 - Da) + Dc×(1 - Sa)]

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Next: Graphical Art Up: Math algorithms Previous: Porter-Duff   Contents   Index

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