Re: [Gimp-developer] Finding out what happens when compositing layers

2011-09-17 Thread Patrick Horgan
On 09/16/2011 09:31 PM, 丰 wrote: > I came across this quite some time ago: > http://www.simpelfilter.de/en/basics/mixmods.html > That's wonderful! Even mentions GIMP a bit. Patrick ___ Gimp-developer mailing list Gimp-developer@lists.XCF.Berkeley.EDU h

Re: [Gimp-developer] Finding out what happens when compositing layers

2011-09-16 Thread
I came across this quite some time ago: http://www.simpelfilter.de/en/basics/mixmods.html PS: I thought I had type in my word before I send the mail. I did not know what had happened. Sorry to everybody for the spam and wish this mail is all right. -- 2.6.32.26-175.fc12.x86_64 ___

Re: [Gimp-developer] Finding out what happens when compositing layers

2011-09-16 Thread
I came across this quite some time ago: http://www.simpelfilter.de/en/basics/mixmods.html -- 2.6.32.26-175.fc12.x86_64 ___ Gimp-developer mailing list Gimp-developer@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-developer

Re: [Gimp-developer] Finding out what happens when compositing layers

2011-09-16 Thread David Gowers (kampu)
On Sat, Sep 17, 2011 at 8:36 AM, Ofnuts wrote: > ** > On 09/16/2011 02:20 AM, David Gowers (kampu) wrote: > > In GEGL, the layer mode code is autogenerated from formula strings -- see > operations/generated/math.rb > > The opacity behaviour is not documented there, but my understanding is that >

Re: [Gimp-developer] Finding out what happens when compositing layers

2011-09-16 Thread Ofnuts
On 09/16/2011 02:20 AM, David Gowers (kampu) wrote: In GEGL, the layer mode code is autogenerated from formula strings -- see operations/generated/math.rb The opacity behaviour is not documented there, but my understanding is that the alpha of the underlying composite is preserved, and opacity

Re: [Gimp-developer] Finding out what happens when compositing layers

2011-09-15 Thread David Gowers (kampu)
In GEGL, the layer mode code is autogenerated from formula strings -- see operations/generated/math.rb The opacity behaviour is not documented there, but my understanding is that the alpha of the underlying composite is preserved, and opacity only effects how much of the layer's COLOR channels are

[Gimp-developer] Finding out what happens when compositing layers

2011-09-15 Thread Ofnuts
I'll trying to find out what happens when a layer is in subtract mode with a global opacity not one or zero (i.e. what computations are done with the pixels values of the composite image of the layers below, the pixel values of the layer, and the general opacity). I have a git extract of the Gi