From: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Date: Wed, 8 Jul 2020 16:43:23 +0000 (-0400)
Subject: nir: allow nir_lower_clip_halfz to run in geometry shaders
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=b8df1c43d24a73740ddd8702d480eded11287b3f;p=mesa.git

nir: allow nir_lower_clip_halfz to run in geometry shaders

the final output of gl_Position needs this transform, and geometry shaders
must write this value for stream 0 if rasterization is enabled

Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5851>
---

diff --git a/src/compiler/nir/nir_lower_clip_halfz.c b/src/compiler/nir/nir_lower_clip_halfz.c
index 13b7a5b8f1e..6db1910362f 100644
--- a/src/compiler/nir/nir_lower_clip_halfz.c
+++ b/src/compiler/nir/nir_lower_clip_halfz.c
@@ -56,7 +56,8 @@ lower_pos_write(nir_builder *b, struct nir_instr *instr)
 void
 nir_lower_clip_halfz(nir_shader *shader)
 {
-   if (shader->info.stage != MESA_SHADER_VERTEX)
+   if (shader->info.stage != MESA_SHADER_VERTEX &&
+       shader->info.stage != MESA_SHADER_GEOMETRY)
       return;
 
    nir_foreach_function(function, shader) {