[GSoC] KWin colour management

[todd rme]

On Wed, Mar 21, 2012 at 8:39 AM, Kai-Uwe Behrmann <ku.b at gmx.de> wrote:
> Am 20.03.12, 21:17 +0100 schrieb Thomas Lübking:
>
>> Am 20.03.2012, 20:12 Uhr, schrieb Martin Graesslin <mgraesslin at kde.org>:
>>
>>> A fully  color corrected compositor seems feasible to me
>>
>> I'm atm. not even sure about that.
>>
>> I might be utterly wrong, but my impression is that the xvidmode extension
>> can correct screens (eg. xcalib loads icc profiles), so a screen wide color
>
> xvidmode gamma ramps are per channel curves. These are very limited compared
> to ICC based colour correction. Those gamma curves provide better gray
> balance and potentialy white point adjustment. But they do not describe
> colour primaries shifts or other more complex distortions. Gamma curves must
> be taken into account for ICC profiles. But detailed characterisation of
> device colorimetry happens usualy in ICC profiles.

This may be an ignorant question, but can xvidmode be extended to
offer more complex correction?

-Todd