On Sat, Apr 25, 2009 at 12:05 AM, Alchemie foto\grafiche <fotocom...@yahoo.it> wrote: > > I found the algorithms of many merging mode > > BUT all the the formula there do not take opacity into account so as now the > blending may be done only at 100% opacity > (btw is for a "blending filter" , that allow to merge also in mode not > available in Gimp > obviously the result, the output is the visible from the the merging as new > layer ) > > I'm sure somewhere in the Gimp code or documentation there is the answer: > how ,mathematically variation of opacity are taken into account, but i am > really lost in front of page of codes and doc
You should understand, that the new GEGL-based layer modes are subtly different from the legacy GIMP code in how they treat alpha. That said, app/gegl/gimpoperationpointlayermode.c contains all code dealing with layer compositing modes, and that is as simple as it gets. Yes, I find it confusing too. _______________________________________________ Gimp-developer mailing list Gimp-developer@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-developer
