No XV_HUE for Intel 915/945 in Overlay

[Matthias Hopf]

On Mar 26, 07 09:22:11 -0400, Ken Mandelberg wrote:
> The overlay driver supports brightness, contrast, and saturation but not 
> hue. The code looks like it just pushes the task to the chip for the 
> three it supports. Why is HUE different, does the chip not support it?

Brightness, contrast, saturation are linear operators in Y'CbCr color
space, while gamma and hue correction are highly nonlinear. So that can
very well be the case.

Matthias

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