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darken mode
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Description:
Both parameters are compared to each other, the smaller one is taken.
Completely white layers do not change the background at all (and vice versa) -
completely black layers give a black result.
Formula:
f(a,b) = |
a (for a < b) |
b (else) |
Advantage:
This mode is commutative (base and blend color can be swapped).
Code:
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