Re: Enabling colour management in openGL code

[Aravindh M <aravindh 2138 gmail com>]

Hi,

I am a newbie. I only vaguely understand what you have written. :(

As I understand, for my openGL code to run with the right colours, I
need to fix videoLUT and the Color Matrix (What's this?). Which of
these is fixed by using gnome colour manager?
You had mentioned that videoLUT works for everything on the screen,
regardless of which application is rendering. What about Color Matrix?

Thanking you,
M. Aravindh

On Sat, Dec 18, 2010 at 4:52 PM, Pascal de Bruijn <pmjdebruijn pcode nl> wrote:
> On Sat, Dec 18, 2010 at 11:58 AM, Aravindh M <aravindh 2138 gmail com> wrote:
>> Hi,
>>
>> Thanks for the quick reply.
>>
>> If gcm updates the videoLUT, do I need to use lcms/lcms2. Do I need to
>> do something extra (apart from selecting the profile for the display
>> device in the devices tab of gnome colour manager) to update the
>> videoLUT.

>
> The VideoLUT and Color Matrix complement each other... Like I said the
> VideoLUT only compensates for white point and gamma. The color matrix
> compensates for color shifts and saturation...
>
>> I came across this comment on http://live.gnome.org/GnomeColorManager
>> "(although huey is now a native driver, the profiles it produces are poor)."
>> Is this still an issue.
>
> Native is meant as in native to GCM, otherwise GCM uses ArgyllCMS to
> drive the colorimetric instruments, and Argyll has given me good
> results.
>
> Regards,
> Pascal de Bruijn
>