On Fri, Jul 13, 2012 at 2:33 PM, Calculemus <calculemus1988@xxxxxxxxx> wrote: > Sorry I replied to previous message with this content, but meant to send > this > as new topic. > > How does GIMP deal with Porter-Duff operations and Blend modes? > > Where can I find an example code of this? > > Mathematically there is one formula to mix porter-duff and blending > into one, but I am interested how is this implemented. > > Thanks > _______________________________________________ > gimp-developer-list mailing list > gimp-developer-list@xxxxxxxxx > https://mail.gnome.org/mailman/listinfo/gimp-developer-list > The way blending modes are done in GIMP is a hack using 8-bit integers and not a good representation of Porter-Duff operations. Look into GEGL's sources, it even has a Porter-Duff category http://gegl.org/operations.html _______________________________________________ gimp-developer-list mailing list gimp-developer-list@xxxxxxxxx https://mail.gnome.org/mailman/listinfo/gimp-developer-list
