Dr Andrew C Aitchison <[EMAIL PROTECTED]> wrote: > If you care about your colour quality you may care to measure your monitor > yourself and use the functions > XF86VidModeSetGammaRamp > XF86VidModeGetGammaRamp > XF86VidModeGetGammaRampSize > (in include/X11/extensions/xf86vmode.h) to set the gamma curves to the > shape of your choice.
> I'm not aware of a user app to use this interface; perhaps someone > could extend xgamma to read a ramp into or out of a file ? I've written something like this. Whoever added the Set/GetGammaRamp functions in XFree86 4.1, thank you very much! I've been using this tool to roughly match color response of a bunch of assorted LCD projectors on our tiled display wall, with some success. (If anyone else tries that: buy a few extras! Of 20 at hand, we have about 16 with rather similar response and a few wild outliers. A few spares would allow replacing the oddballs. As it is, we have to raise the "black" floor and lower the "white" ceiling quite a bit to accommodate the most erratic projectors.) The load-gamma-ramp program is at http://niri.ncsa.uiuc.edu/slevy/tilecal/sgamma.c and the whole calibrate-by-hand package, minimally documented, at http://niri.ncsa.uiuc.edu/slevy/tilecal.tar.gz - Stuart Levy, [EMAIL PROTECTED] NCSA, University of Illinois Urbana-Champaign _______________________________________________ Xpert mailing list [EMAIL PROTECTED] http://XFree86.Org/mailman/listinfo/xpert
