Re: [Openexr-devel] Introduction and CTL/ICC question

[Paul Schneider]

Yes, XF86VidModeSetGammaRamp is an X-Windows API.  There is an 
equivalent API for OS X.  See CGDirectDisplay.h and friends.

However, this routine adjusts the gamma ramp of your video card, which 
1) affects the entire monitor and 2) only operates on the 8-bit data in 
the video framebuffer.  You'll lose a lot of precision if you're trying 
to manipulate floating-point data like this.

On Mar 10, 2005, at 12:09 AM, Kai-Uwe Behrmann wrote:

> Am 10.03.05, 08:06 +0100 schrieb Kai-Uwe Behrmann:
>
> > Yes, thats reasonable I think. For one dimensional LUTs isnt the
> > XF86VidModeSetGammaRamp sufficient? OpenGL applications seems to been
>
> To be more verbose; XF86VidModeSetGammaRamp is an Xorg/XFree86 only 
> API.
> For osX it seems not to work.
>
> regards
> Kai-Uwe Behrmann
>                                 + development for color management
>                                 + imaging / panoramas
>                                 + email: address@hidden
>                                 + http://www.behrmann.name
>
>
>
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