Hi, On Wed, 2008-05-14 at 17:36 +0200, Jan Heller wrote:
> The gegl-fixups.c code deals with gamma corrected RGB u8 > conversions, so the inlining would affect RGBA float -> R'G'B' u8 conversion. > However, after loading a jpeg file into gimp-2.5 and > the using a color tool, conversions from RGB u8->RGBA float > and RGBA float -> RGB u8 are requested, that is non-gamma > corrected RGB u8. Is there a simple way how to make gimp > request conversions from/to R'G'B'u8 space? Changing this in GIMP is not feasible. What needs to be done is to implement shortcuts for the conversions that GIMP actually uses. Eventually he gimp-8bit extension should provide shortcuts for both gamma-corrected and linear 8bit <-> double conversions. The lookup tables in gegl-fixups are rather large, btw. As pointed out in the paper, a much smaller lookup table would be sufficient to cover the range from 0.0 to 1.0. I guess that adding a clever range check and reducing the size of the lookup tables would yield a performance improvement due to better cache coherency. Sven _______________________________________________ Gegl-developer mailing list [email protected] https://lists.XCF.Berkeley.EDU/mailman/listinfo/gegl-developer
