[Intel-gfx] Colour management (beyond gamma)

[Andrew Lutomirski]

On Thu, Jan 21, 2010 at 10:28 AM, Peter Clifton <pcjc2 at cam.ac.uk> wrote:
> Hi guys,
>
> I was wondering what support for colour management exists in the 965
> hardware beyond what is currently exposed in the Linux drivers.
>
> I noted that on Win32, the Intel driver allows complex adjustment of the
> device colour output (If memory serves, more than just 3x gamma knobs).
>
> >From the PRM, I see there is a 10 bit mapping table - are there any
> drivers which are available to tweak those settings?
>
> Does the laptop Bios hard-code any LCD panel colour information?
>
>
> The LCD panel in my HP laptop has awful colour rendition. Its gamma
> appears to vary quite a bit on the R, G and B channels - and no ammount
> of twiddling the 3 gamma settings with xrandr can quite correct for it.

There are programmable LUTs, supported on Linux (not supported very
reliably, though, until quite recent Xorg versions).  Take a look at
argyllcms.

--Andy