Re: [Dri-devel] Hardware TexSubImage

[Brian P. <bri...@tu...>]

Chris Ison wrote:
>>What do you mean by "hardware TexSubImage"?
>>
> 
> Maybe I'm reading it wrong but looking at these texbubimage functions, they
> all copy out a the part of the texture to use, what I'm wondering is if
> there is a way to tell the card to do that.

I believe a DMA transfer is used to move texture data from main memory 
to the card.  What else do you have in mind?


> Also, atm Mesa falls back to software for vertex arrays, is it possable (and
> is it planned) to push the vertex arrays to the r200 instead of  falling
> back to software. Is the DRM missing somthing that has prevented this from
> happening already?

Typically, OpenGL's vertex arrays have to be translated into 
DirectX-style arrays of vertex structures.  That's done by Mesa / the 
driver.  Thereafter, the gfx hardware is doing the vertex 
processing/rendering.  I wouldn't call that a software fallback since 
I don't think the gfx cards can do the SOA->AOS conversion anyway.

The DRM doesn't figure into this.

Keith's the expert on this stuff but he's on vacation for 2 weeks.

-Brian