Just uploaded a revised layer mode patch to
- is about as fast as the legacy modes
- adds Lab Burn mode
The Lightness mode is really cool, because it effectively gives you Lab
- duplicate your layer (or make new from visible)
- set top layer to 'Lightness (Lab)'
- Use normal Curves, Levels, or whatever you prefer.
next thing I'll do is rework the integer math routines, so they don't
require intermediate 64bit ints -- and run faster.
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