Having trouble with D3D 8 Gamma Ramps

Graphics and GPU Programming Programming

Started by Forcas December 18, 2001 10:12 PM

5 comments, last by Forcas 22 years, 4 months ago

181

Author

December 18, 2001 10:12 PM

Okay... so I have this Ramp stucture, D3DGAMMARAMP MyRamp, and after initializing the graphics, I try to fill it with the current ramp, like this:

lp3dd->GetGammaRamp(&MyRamp)

When I try to replace the current gamma ramp with MyRamp, by doing this:

  lp3dd->SetGammaRamp(D3DSGR_CALIBRATE, &MyRamp);

The screen blacks out. The only time I modify MyRamp is when I call GetGammaRamp. What could I be doing wrong?

-Forcaswriteln("Does this actually work?");

Forcas

181

Author

December 19, 2001 06:09 PM

*bump*

-Forcaswriteln("Does this actually work?");

Anonymous

December 19, 2001 07:20 PM

Try leaving out the D3DSGR_CALIBRATE. It doesn''t work on all machines, so you''d have to do all the testing for it first.

Forcas

181

Author

December 19, 2001 09:54 PM

Still doesn''t work. I''ve heard from some people that gamma ramps won''t work with DirectX 8 and a GeForce 256. Could this be true?

-Forcaswriteln("Does this actually work?");

Forcas

181

Author

December 19, 2001 09:56 PM

I don't think GetGammaRamp is working properly for me. When I call GetGammaRamp, and try using the MyRamp.red[x] value, it acts as the value of x. EVEN WHEN x is over 255!!! WHat's going on here? I thought the array was only supposed to have 256 elements.

Edited by - Forcas on December 19, 2001 11:00:41 PM

-Forcaswriteln("Does this actually work?");

zerwit

122

December 19, 2001 10:02 PM

I just want to say that I have the same problem, I have a Voodoo 3.

*** Triality ***

*** Triality ***

Forcas

181

Author

December 20, 2001 12:17 AM

Hmm... interesting. Has ANYONE gotten Gamma Ramps to work with DX8?

-Forcaswriteln("Does this actually work?");

Having trouble with D3D 8 Gamma Ramps

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Having trouble with D3D 8 Gamma Ramps

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