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gallium: add a sampler reduction cap + settings

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This is to allow for
  VK_EXT_sampler_filter_minmax
  GL_EXT_texture_filter_minmax
support

Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Karol Herbst <kherbst@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9487>
This commit is contained in:
Dave Airlie
2021-03-05 15:23:57 +10:00
committed by Marge Bot
parent 8016a098fc
commit 7c999249ef
4 changed files with 12 additions and 0 deletions
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docs/gallium/screen.rst
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@@ -612,6 +612,7 @@ The integer capabilities:
* ``PIPE_CAP_PREFER_REAL_BUFFER_IN_CONSTBUF0``: The state tracker is encouraged to upload constants into a real buffer and bind it into constant buffer 0 instead of binding a user pointer. This may enable a faster codepath in a gallium frontend for drivers that really prefer a real buffer.
* ``PIPE_CAP_GL_CLAMP``: Driver natively supports GL_CLAMP. Required for non-NIR drivers with the GL frontend. NIR drivers with the cap unavailable will have GL_CLAMP lowered to txd/txl with a saturate on the coordinates.
* ``PIPE_CAP_TEXRECT``: Driver supports rectangle textures. Required for OpenGL on `!prefers_nir` drivers. If this cap is not present, st/mesa will lower the NIR to use normal 2D texture sampling by using either `txs` or `nir_intrinsic_load_texture_scaling` to normalize the texture coordinates.
* ``PIPE_CAP_SAMPLER_REDUCTION_MINMAX``: Driver support min/max sampler reduction.
.. _pipe_capf: