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OpenGL and ATI (Read 695 times)
watz
OpenGL and ATI
Aug 13th, 2006, 11:11am  
I have a Dell Inspiron 9100 with a Radeon Mobility 9700, and I'm having some annoying problems with OpenGL that I suspect are specific to the card.

1. If I have anti-aliasing turned on in the "advanced" Display Control panel, using the OpenGL renderer will force a redraw every frame. No trails in OpenGL. I tried Christian's proGL renderer with the same result.

2. If I turn anti-aliasing off in Display, trails are possible but of course the graphics look like 8 bit heaven.

smooth() / noSmooth() have no effect whatsoever on OpenGL, this is something I have seen on a nVidia card too.

Can anyone clarify what's going on here? I know that there are plenty of grumbles against ATI cards, but I don't know the specifics. Right now this is annoying because it genuinely limits what kind of projects I can work on.
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marius watz // unlekker // code & form // Generator.x
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mkn
Re: OpenGL and ATI
Reply #1 - Sep 19th, 2006, 6:59pm  
I have similar problems. My guess is that the drivers use a very limited set of indexed colors by default (to boost performance) and when turning on anti aliasing it switches to ARGB. This can be altered with GL, but this far I haven't got it working.
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