DirectDraw over Direct3D

Peter Beutner p.beutner at
Mon Dec 5 15:22:23 CST 2005

Lionel Ulmer schrieb:
> On Sun, Dec 04, 2005 at 07:27:29PM -0700, Jesse Allen wrote:
>>This patch seems similar to glSDL where it wraps SDL's 2d API to
>>OpenGL. The good thing about this it can provide acceleration and not
>>require root like DGA.  The bad thing with this idea is that it can't
>>be used on older video cards or even some newer ones that lack proper
>>direct rendering. 
> The problem is not direct rendering, it's more 'basic' OpenGL acceleration.
>>Am I correct that even when just doing depth
>>conversions, without direct rendering it will still be slow?
> If you have accelerated OpenGL rendering but without direct access, I think
> that it should still be faster than the current method (as you would 1) move
> less data over the GPU bus and 2) do less CPU computation on a big amount of
> data).

Isn't indirect rendering always unaccelerated, i.e. done in software?

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