On Wed, Sep 1, 2010 at 6:35 AM, Martin Nordholts <ense...@gmail.com> wrote:
> My point was that we either decide that GEGL should render just like
> legacy, in which case we would need to implement both kinds of color
> layer modes in GEGL, or we decide that some incompatibilities are OK, in
> which case we don't need the legacy color modes in GIMP.
> Right now, the Overlay layer mode actually renders differently in GEGL
> than in legacy, so we would also have to introduce an "(obsolete)"
> version of Overlay. (The legacy Overlay is exactly identical to legacy
> Soft Light, but the GEGL Overlay is different from the GEGL Soft Light.)

GEGL will do compositing in linear light RGB, while GIMP will do
compositing in sRGB (unless profiles are attached to the image, then
it will do compositing in that random space). The results of GEGL
compositing when GIMP is not lying to GEGL about the pixel format of
the pixels will in most cases result in slightly different results.

/Øyvind K.
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