-
The various clut handling functions like a setup consistent with the x-screen color depth. Otherwise we observe improper sampling in the gamma tables at depth 30. Therefore replace hard-coded bitsPerRGB = 8 by actual bits per channel scrn->rgbBits. Also use this for call to xf86HandleColormaps(). Tested for uxa and sna at depths 8, 16, 24 and 30 on IvyBridge, and tested at depth 24 and 30 that xgamma and gamma table animations work, and with measurement equipment to make sure identity gamma ramps actually are identity mappings at the output. v2: Also deal with X-Server 1.19 and earlier, which as of v1.19.6 lack a fix to color palette handling and can not deal with depths/bpc > 24/8 bpc. On < 1.20 we skip xf86HandleColormaps() setup at > 8 bpc. This disables color palette handling on such servers at > 8 bpc, but still keeps RandR gamma table handling intact. Tested on 1.19.6 and 1.20.0 to do the right thing. Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
33ee0c3b