>|> I have a new RS6000/580 that I have to put a thrid party monitor on.
>|> It is an SGI multi-sync monitor, and the picture comes through fine,
>|> but the gamma correction is wrong. SGI uses a gamma of 1.7, and IBM
>|> uses 2.4 (according to InfoExplorer).
>|>
>|> Is there a way to change the gamma the hft device driver uses?
>|>
>On the sabine (hiperf3d) adapter, the gl call will set the gamma function. I
>don't know if the other IBM adapters support setting gamma. Out of curiousity
>where in infoexplorer was the gamma=2.4 reccommended? My experience with the
>5081/6091 displays (working with antialiasing) was that 1.6 - 1.7 was the
>appropriate gamma value.
On my system, searching info for "gamma" and "correction" in exact order
brings up a small article entitled Gamma Correction, which states:
To achieve a linear response from the monitor, the system must vary the input voltage by some exponent. The exponent is called the monitor's gamma. Linear response is achieved on standard RISC System/6000 monitors with a gamma of 2.4. The system uses a hardware lookup table to compensate for nonlinear response.
