New acceleration architecture

Thomas Winischhofer thomas at winischhofer.net
Wed Jun 29 13:29:02 PDT 2005


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Eric Anholt wrote:
> On Wed, 2005-06-29 at 22:08 +0200, Thomas Winischhofer wrote:
> 
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>>Thomas Winischhofer wrote:
>>
>>>One more thing: PrepareCopy is supposed to be given boolean "reverse"
>>>and "upsidedown", but from CopyNtoN is called with some integer "dx" and
>>>"dy"...
>>>
>>>Can there be overlapping blits in this concept, requiring "reverse" and
>>>"upsidedown" (which specify the drawing direction I assume)?
>>
>>
>>Erm.. one more thing: The executing calls (Solid(), Copy(), etc) come
>>without any argument that would allow retrieving pScrn or the like....
>>just the coordinates. Hm...
> 
> 
> Yep.  In KAA drivers you would save out whatever bits you needed to some
> global variable in the Prepare call.  I always thought that was a bit
> ugly, but it worked.


But please... I very much hope this isn't meant to be this way. Am I
supposed to store my pSiS at a global location...? Especially great for
dual head...

- --
Thomas Winischhofer
Vienna/Austria
thomas AT winischhofer DOT net          http://www.winischhofer.net/
twini AT xfree86 DOT org
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