tree c86b7e75f36142ef681b13be555c3ab5c502eb54
parent 4a87e4441348cc45faea1f442294c8cac3b5a288
author Marek Olšák <marek.olsak@amd.com> 1607559517 -0500
committer Dylan Baker <dylan.c.baker@intel.com> 1608240097 -0800

radeonsi: fix small primitive culling with MSAA force-disabled and smoothing

The problem was that the shader constants were based on the framebuffer
sample count and ignored the multisample enable state and the line/polygon
smoothing state, which uses MSAA rasterization that only sets SampleMaskIn
to get the coverage for alpha-blended smoothing (the PS epilog computes
the alpha channel from SampleMaskIn and blending generates the AA results).

- This is a complete rework that adds a new state for NGG cull constants.
- It fixes the same thing for the prim discard compute shader.
- It documents how VS_STATE.SMALL_PRIM_PRECISION is encoded.

It fixes blue corruption in Unigine Heaven with MSAA and Medium details
or better.

Fixes: 7648060dc03 - radeonsi: enable NGG culling by default on gfx10.3 dGPUs
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8134>