[PATCH 1/2] wined3d: Correct required extension for R8G8B8A8_UINT.

[Henri Verbeet]

On Wed, 13 May 2020 at 19:29, Chip Davis <cdavis at codeweavers.com> wrote:
> May 13, 2020 9:49 AM, "Henri Verbeet" <hverbeet at gmail.com> wrote:
> > On Tue, 12 May 2020 at 11:30, Chip Davis <cdavis at codeweavers.com> wrote:
> >
> >> GL_ARB_texture_rgb10_a2ui provides support for the GL_RGB10_A2UI format,
> >> and nothing else.
> >
> > It adds support for using UNSIGNED_INT_8_8_8_8_REV with TexImage*()
> > and integer formats. See "Modify Section 3.7.4 ..." in the
> > ARB_texture_rgb10_a2ui spec, or (more explicitly) issue 4 in that same
> > spec.
>
> You are correct, sir.
>
> But why is that pixel format using a packed data type when (GL_RGBA_INTEGER, GL_UNSIGNED_BYTE) should be adequate?
>
Big-endian CPUs, probably. Not that that's particularly relevant these
days, but IIRC that's the main reason to avoid GL_UNSIGNED_BYTE, at
least traditionally.