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docs/gallium: Document the index buffer format convention 

Signed-off-by: Alyssa Rosenzweig <alyssa@collabora.com>
Reviewed-by: Emma Anholt <emma@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10990>
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Alyssa Rosenzweig 2021-05-25 17:59:46 -04:00 committed by Marge Bot
parent a86deb1e72
commit d058ce7e88
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docs/gallium/format.rst
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@ -51,6 +51,11 @@ Format names with an embedded underscore are subsampled. ``R8G8_B8G8`` is a
single 32-bit block of two pixels, where the R and B values are repeated in
both pixels.
Index buffers do not have a natural format in Gallium structures. For purposes
of ``is_format_supported`` queries, the formats ``R8_UINT``, ``R16_UINT``, and
``R32_UINT`` are used with ``PIPE_BIND_INDEX_BUFFER`` for 8-bit, 16-bit, and
32-bit index buffers respectively.
References
----------