Re: [Mesa3d-dev] Texture formats

[Gareth H. <ga...@va...>]

Brian Paul wrote:
> 
> Right.  Though it's the format that would be GL_COLOR_INDEX and the
> internalFormat would be GL_COLOR_INDEX_*.

Indeed :-)

> That sounds right.  I'd have to review the code to say for certain.

Cool.

> I think a few more utility routines may be in order.  Because in all
> the drivers' TexImage*() functions we always have to do something
> like this (lots of details omitted):
> 
> if (anyPixelTransferOps) {
>     allocate tempBuffer
>     _mesa_transfer_teximage(dest = tempBuffer, source = userData)
>     _mesa_convert_texsubimage2d(dest = texImage->Data, src = tempBuffer);
>     free tempBuffer
> }
> else {
>    _mesa_convert_texsubimage2d(dest = texImage->Data, src = tempBuffer);
> 
> }
> 
> In the 3dfx driver it's more complicated because of the image
> rescaling that's sometimes needed.

Hence my earlier argument that _mesa convert_texsubimage2d() shouldn't
be allowed to fail :-)

-- Gareth