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turnip: Implement VK_EXT_primitives_generated_query

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Similar to pipeline statistics but done for a single counter.

We use REG_A6XX_RBBM_PRIMCTR_7 to get generated primitives
and not PRIMCTR_8 because PRIMCTR_7 counts pre-clipped prims
while PRIMCTR_8 counts them after clipping.

OpenGL spec for GL_PRIMITIVES_GENERATED says:
 "Subsequent rendering will increment the counter once for every
  vertex that is emitted from the geometry shader, or from the
  vertex shader if no geometry shader is present."

Passes tests:
 dEQP-VK.transform_feedback.primitives_generated_query.*

Signed-off-by: Danylo Piliaiev <dpiliaiev@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/15746>
This commit is contained in:
Danylo Piliaiev
2022-04-05 12:41:10 +03:00
committed by Marge Bot
parent 5ac8f10ec3
commit dde1623ed2
3 changed files with 103 additions and 1 deletions
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docs/features.txt
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@@ -560,7 +560,7 @@ Khronos extensions that are not part of any Vulkan version:
VK_EXT_physical_device_drm DONE (anv, radv, tu, v3dv)
VK_EXT_post_depth_coverage DONE (anv/gfx10+, lvp, radv/gfx10+)
VK_EXT_primitive_topology_list_restart DONE (anv, lvp, radv, tu)
VK_EXT_primitives_generated_query DONE (lvp)
VK_EXT_primitives_generated_query DONE (lvp, tu)
VK_EXT_provoking_vertex DONE (anv, lvp, radv, tu, v3dv)
VK_EXT_queue_family_foreign DONE (anv, radv, vn)
VK_EXT_robustness2 DONE (anv, radv, tu)