Re: [Gegl-developer] Compositors

On Sat, Jul 7, 2012 at 9:24 PM, Calculemus <calculemus1988 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?


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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.

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