On Sat, Jul 7, 2012 at 9:24 PM, Calculemus <calculemus1...@gmail.com> wrote: > I am trying to understand the code for the compositor soft-light, > in the file /gegl-0.2.0/operations/generated/soft-light.c. > > I am not sure about line 25: aD = aA + aB - aA * aB; > > What is aD, is it alpha channel? Does gegl assume that the > input image buffers are RGBA? > > Thanks > > _______________________________________________ > gegl-developer-list mailing list > gegl-developer-list@gnome.org > https://mail.gnome.org/mailman/listinfo/gegl-developer-list >
Just above the process function you can see the prepare function which sets input, aux and output buffers to RaGaBaA which is RGBA with premultiplied alpha. _______________________________________________ gegl-developer-list mailing list gegl-developer-list@gnome.org https://mail.gnome.org/mailman/listinfo/gegl-developer-list
