On 06/29/2009 10:31 AM, Emil Assarsson wrote:
> I meant the modes that are used to mix colors with layers and brush
> like Normal, Dissolve, Multiply, Divide etc...
>    

Currently, the Color layer mode when using GEGL is supposed to use the 
Hue and Saturation of the upper layer and the Lightness from the lower 
layer. Maybe the RGB -> HSL conversion is buggy? We want Color to behave 
correctly in GIMP 2.8 when using GEGL for the projection, see 
http://bugzilla.gnome.org/show_bug.cgi?id=325564 . It is great that you 
want to look at this, and all you have to do is experiment with 
different algorithms in 
gimp_operation_point_layer_mode_get_new_color_hsl() in 
app/gegl/gimpoperationpointlayermode.c.

Good luck!

Best regards,
Martin

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