Right, in Rig we use rut_color_init_from_4f in this case, maybe we could do the same kind of thing here. Regards, - Robert <div class="gmail_quote">On May 28, 2013 2:59 PM, "Neil Roberts" <<a href="mailto:neil@linux.intel.com">neil@linux.intel.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> Robert Bragg <<a href="mailto:robert@sixbynine.org">robert@sixbynine.org</a>> writes: > I just realized that this bit also needs to initialize the alpha component: > > + if (saturation == 0) > + { > + color->red = color->green = color->blue = (luminance * 255); > + > + return; > + } Looks like it also shouldn't multiply by 255 seeing as CoglColors are floats. Regards, - Neil --------------------------------------------------------------------- Intel Corporation (UK) Limited Registered No. 1134945 (England) Registered Office: Pipers Way, Swindon SN3 1RJ VAT No: 860 2173 47 This e-mail and any attachments may contain confidential material for the sole use of the intended recipient(s). Any review or distribution by others is strictly prohibited. If you are not the intended recipient, please contact the sender and delete all copies. _______________________________________________ Cogl mailing list <a href="mailto:Cogl@lists.freedesktop.org">Cogl@lists.freedesktop.org</a> <a href="http://lists.freedesktop.org/mailman/listinfo/cogl" target="_blank">http://lists.freedesktop.org/mailman/listinfo/cogl</a> </blockquote></div>