> winMask = --> dst = src & !dst --> masking
> winErase = --> dst = src & dst --> cropping
my booboo..
for starters:
dst = dst & !src;
dst = dst & src; <-- this is how it was done in pre 3.5
for 3.5 and later, you can check the implementation of the winMask
and winErase functions (in the source code) but basically, it is
as follows:
winErase: // aka "crop"
// if source pixel is off, set destination pixel to background color
winMask:
// if source pixel is on, set detination pixel to background color
those last two statements should clarify what you were having a problem
with.. unforunately, the good old scrAND and scrANDNOT versions of this
are no longer in place.
// az
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