Working on getting high bit depth color conversion to work (still not there yet!) has meant peeking into a lot of babl/gegl/gimp code. I noticed unusual sRGB tone curve values in the functions "linear_to_gamma_2_2" and "gamma_2_2_to_linear", defined in /babl/babl/util.h. The standard values are: 0.04045 and 0.0031308. The util.h values are: 0.03928 and 0.0030402477. I was curious as to whether/where/how gimp uses these functions (via babl, it must be) and why nonstandard values are used. If anyone is interested, I put together some test code to see what difference the resulting values might be, given appropriate input values: http://ninedegreesbelow.com/temp/gimp-lcms-4.html#srgbtc Elle -- http://ninedegreesbelow.com Articles and tutorials on open source digital imaging and photography _______________________________________________ gimp-developer-list mailing list gimp-developer-list@xxxxxxxxx https://mail.gnome.org/mailman/listinfo/gimp-developer-list
