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gallium: add PIPE_CAP_NULL_TEXTURES

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this allows drivers to indicate that they support sampling from null
textures instead of using fallback textures

for now, this is only used for depth-based fallback textures

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21072>
This commit is contained in:
Mike Blumenkrantz
2023-02-02 10:45:20 -05:00
committed by Marge Bot
parent 7f98fcae52
commit 2127287d4d
8 changed files with 25 additions and 11 deletions
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docs/gallium/screen.rst
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@@ -640,6 +640,7 @@ The integer capabilities:
* ``PIPE_CAP_DEVICE_PROTECTED_CONTEXT``: Whether the device supports protected / encrypted context which can manipulate protected / encrypted content (some devices might need protected contexts to access protected content, whereas ``PIPE_CAP_DEVICE_PROTECTED_SURFACE`` does not require any particular context to do so).
* ``PIPE_CAP_ALLOW_GLTHREAD_BUFFER_SUBDATA_OPT``: Whether to allow glthread to convert glBufferSubData to glCopyBufferSubData. This may improve or worsen performance depending on your driver.
* ``PIPE_CAP_VALIDATE_ALL_DIRTY_STATES`` : Whether state validation must also validate the state changes for resources types used in the previous shader but not in the current shader.
* ``PIPE_CAP_NULL_TEXTURES`` : Whether the driver supports sampling from NULL textures.
.. _pipe_capf: