From 1a4c4cd110380c99c51e57c59c868beac01234d2 Mon Sep 17 00:00:00 2001
From: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Date: Wed, 9 Dec 2020 15:41:59 +0100
Subject: [PATCH] driconf: add workaround for Enter The Gungeon
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Quoting a comment on the bug report:

   I suspect the shader is incorrect.

   When a (conditional) discard is executed then control flow
   becomes non-uniform, meaning that subsequent implicit
   derivatives required for the texture operation are not
   computed correctly.

Using glsl_correct_derivatives_after_discard fixes it. Note
that for radeonsi this requires LLVM master to work properly.

Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/1386
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8005>
---
 src/util/00-mesa-defaults.conf | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/util/00-mesa-defaults.conf b/src/util/00-mesa-defaults.conf
index 6a38e9ab6eb..16e54150c6c 100644
--- a/src/util/00-mesa-defaults.conf
+++ b/src/util/00-mesa-defaults.conf
@@ -593,6 +593,14 @@ TODO: document the other workarounds.
             <option name="allow_higher_compat_version" value="true" />
         </application>
 
+        <application name="Enter The Gungeon (32 bits)" executable="EtG.x86">
+            <option name="glsl_correct_derivatives_after_discard" value="true" />
+        </application>
+
+        <application name="Enter The Gungeon (64 bits)" executable="EtG.x86_64">
+            <option name="glsl_correct_derivatives_after_discard" value="true" />
+        </application>
+
         <!-- Gallium Nine workarounds: -->
         <application name="Rayman Legends" executable="Rayman Legends.exe">
             <option name="dynamic_texture_workaround" value="true" />