[Mesa-dev] Gallium pixel formats on big-endian

Adam Jackson ajax at redhat.com
Mon Feb 11 07:06:09 PST 2013

On Mon, 2013-02-11 at 05:27 -0800, Jose Fonseca wrote:

> > Actually, on second thought this means it's probably better to keep the
> > current naming scheme for array formats. Maybe the component names and
> > sizes could be packed together to indicate packed formats, e.g.
> > PIPE_FORMAT_B5G6R5_UNORM would become PIPE_FORMAT_RGB565_UNORM and would
> > be defined identically to MESA_FORMAT_RGB565.
> > For my example above, PIPE_FORMAT_R8G8_UNORM would alias to
> > PIPE_FORMAT_GR88_UNORM (== MESA_FORMAT_GR88) on little endian and to
> > PIPE_FORMAT_RG88_UNORM (== MESA_FORMAT_RG88) on big endian.
> I like this naming better, as I'd prefer the array formats to match
> D3D10, and also to prevent confusion with subsampled formats (like
> R8G8_R8B8).
> Either way the renaming is just syntactic sugar and is neither urgent
> nor a requirement for the semantic changes. But I believe we are
> forming some consensus on how to move forward/
> Ajax, does the above sound good to you too? I think it's not very
> different from your initial suggestion. 

Yeah, this sounds sane.  Keeping array formats consistent with D3D10
naming seems like a smart move.

- ajax

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