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Gf11speed

Color Keying With GeForce3?

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I recently purchased a GeForce3 video card, and the one of the first things I realized is that my game had dropped to 4 FPS! I narrowed the problem down and have come to a conclusion that the problem is my color keying/transparency. But why is this, since my old Voodoo3 card ran great with the settings the way they are. I am doing using the DirectDraw color key scheme... lpdds->SetColorKey(...), etc.. Does anyone know why, when I took out my old Voodoo3 card (which the game ran great on), and put in a GeForce3, that the game runs like this? Should I be changing my code for colorkeying/transparency, or what? Thanks.

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Guest Anonymous Poster
I don''t know DirectDraw (since I''m on Linux), but there is a fundamental difference between Voodoo based cards and GeForces: Voodoo''s support color keying in hardware, GeForce''s don''t. You can emulate color keying with the GeForce by using alpha planes, don''t know how it works in DD though. I can imagine that DD realizes, that your new 3D card doesn''t support hardware keying, so it reverts to 100% software, and everything gets really slow.

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I have no problem using colorkeying with my GeForce3 ???

I have a framerate of 85 (= monitor hz) in 1024x768 32bit.

No problem.

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