On Thu, 2012-08-30 at 07:55 -0400, Elle Stone wrote: > On 8/30/12, Jon Nordby <jononor@xxxxxxxxx> wrote: > > On 30 August 2012 01:01, Elle Stone <l.elle.stone@xxxxxxxxx> wrote: > >> Regarding sRGB and rendering to the screen: > >> Could you explain more about what you mean by "rendering to the screen > >> is done using sRGB"? What about the actual monitor profile? > > > > Cairo, the library used for rendering to the screen in GTK and GIMP > > expects its input as sRGB*. See app/display/gimpdisplayshell.c for > > example of how we use this library. The Babl format "cairo-ARGB32" is > > short for "R'aG'aB'aA u8": 8 bit unsigned integer gamma-corrected, > > pre-multiplied alpha. The LCMS plugin is used before this step to do > > the conversion with the actual monitor profile. > > So if I understand what you are saying (I don't think I do): > First the lcms plugin converts the image to the actual monitor display profile. > Then "something" converts the image to sRGB and sends the image to Cairo? > And then Cairo sends the image to the screen? > > I don't think that is what really happens. If it were happening, all > images displayed by Gimp would have a magenta color cast as displayed > on my monitor. And they don't. Perhaps Cairo just sends RGB numbers to > the screen (and doesn't care what these numbers "mean"), and Gimp is > sending the monitor profile RGB numbers to Cairo. Don't work under the assumption that anything in git master works as it should. It's safe to assume that *nothing* works as it should, and needs to be fixed. So if something doesn't seem to work, the bug could be in many places. --mitch _______________________________________________ gimp-developer-list mailing list gimp-developer-list@xxxxxxxxx https://mail.gnome.org/mailman/listinfo/gimp-developer-list
