Erik Faye-Lund 8e52b7b46d lavapipe: handle null-buffers for xfb
The Vulkan spec says the following for vkCmdBeginTransformFeedbackEXT:

  "For each element of pCounterBuffers that is VK_NULL_HANDLE, transform
   feedback will start capturing vertex data to byte zero in the
   corresponding bound transform feedback buffer."

While not quite as explicit, similar wording exists for
vkCmdEndTransformFeedbackEXT in "Valid Usage" section.

So, this means that we should handle NULL in this case, and simply
ignore the corresponding reads and writes.

This fixes a whole lot of crashes when using transform-feedback with
Zink.

Reviewed-by: Dave Airlie <airlied@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8982>
2021-02-12 11:33:27 +01:00
2020-08-06 09:46:48 +00:00
2021-02-11 11:50:47 -05:00
2021-02-12 11:33:27 +01:00
2020-01-18 11:39:32 +01:00
2020-08-06 09:46:48 +00:00
2019-10-18 16:42:40 +00:00
2021-01-13 09:46:19 -08:00

`Mesa <https://mesa3d.org>`_ - The 3D Graphics Library
======================================================


Source
------

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---------------

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