Mesa (master): radv: fix centroid interpolation

[Samuel Pitoiset]

Module: Mesa
Branch: master
Commit: 73df16dcee79e2281c8d8a830dbbe6655359c82d
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=73df16dcee79e2281c8d8a830dbbe6655359c82d

Author: Samuel Pitoiset <samuel.pitoiset at gmail.com>
Date:   Mon May 21 11:15:51 2018 +0200

radv: fix centroid interpolation

It's legal to set the centroid and sample interpolation modes
when MSAA disabled. So, we have to initialize the centroid
inputs because the hardware doesn't.

This fixes rendering issues with DXVK and The Witness, World of
Warcraft, Trackmania and probably more games.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=106315
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=102390
CC: 18.0 18.1 <mesa-stable at lists.freedesktop.org>
Signed-off-by: Samuel Pitoiset <samuel.pitoiset at gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas at basnieuwenhuizen.nl>

---

 src/amd/vulkan/radv_nir_to_llvm.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/src/amd/vulkan/radv_nir_to_llvm.c b/src/amd/vulkan/radv_nir_to_llvm.c
index 9b9619b877..2d91ded7fe 100644
--- a/src/amd/vulkan/radv_nir_to_llvm.c
+++ b/src/amd/vulkan/radv_nir_to_llvm.c
@@ -2075,9 +2075,6 @@ static void
 prepare_interp_optimize(struct radv_shader_context *ctx,
                         struct nir_shader *nir)
 {
-	if (!ctx->options->key.fs.multisample)
-		return;
-
 	bool uses_center = false;
 	bool uses_centroid = false;
 	nir_foreach_variable(variable, &nir->inputs) {