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SoulSkorpion

Bit of a newbie question :)

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Can OpenGL run without 3D hardware? I was wondering if it''s possible to run OpenGL apps on the machines at Uni, and I''m pretty sure they don''t have graphics cards in them.

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Most OpenGL implementations include a fallback software renderer. Obviously, the quality, feature support, and speed of the software renderer varies depending upon the implementation. The Windows implementation of OpenGL is all-around rather crappy, and the software renderer isn't any exception. Other OpenGL implementations that support software rendering, such as Mesa, do a much better job overall.



[edited by - Null and Void on September 2, 2003 5:12:33 AM]

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Yes, it is possible. Windows comes with a software implementation of opengl 1.1. It is a LOT slower than hardware-accelerated openGL though...

edit - Looks like Null and void beat me to it... with a much more complete reply too

[edited by - marijnh on September 2, 2003 5:13:57 AM]

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Guest Anonymous Poster
Which WA Uni are you attending SoulSkorpion? UWA? Curtin? Edith Cowan? Murdoch?

Just wondering because I will be getting a CS degree at one of them soon...

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quote:
Original post by SoulSkorpion
The Uni machines (well, the ones I''d be using) are all Linux. Anything special I need to know?

If they''re setup properly (with Mesa) they should automatically attempt software emulation; not that it''s going to be as nice as hardware .

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quote:
Original post by Anonymous Poster
Which WA Uni are you attending SoulSkorpion? UWA? Curtin? Edith Cowan? Murdoch?

Just wondering because I will be getting a CS degree at one of them soon...


First year Computer Science at Curtin


....

Thanks for the help, everyone.

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Just to clarify, how slow are we talking in Windows? My app goes from ~90fps to 2fps (if the stars are aligned) in software mode. Is that drastic of a change normal?

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quote:
Original post by tortoise
Just to clarify, how slow are we talking in Windows? My app goes from ~90fps to 2fps (if the stars are aligned) in software mode. Is that drastic of a change normal?

Sure, it can be. If you avoid features that software renderers (and the hardware they rely on: primarly the CPU) are notably bad at handling (high frame buffer resolution, higher bit depths, blending, texture filtering, et cetera) it wouldn''t be quite as dramatic.

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