From 403eb507f586e62acd648778dc1e7d20b5e1fa2f Mon Sep 17 00:00:00 2001
From: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Date: Mon, 20 Apr 2020 14:20:28 +0200
Subject: [PATCH] driconf: add force_integer_tex_nearest option
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And enable it for "GRID Autosport" and "DIRT: Showdown" games.

CC: 20.1 <mesa-stable@lists.freedesktop.org>
Closes: https://gitlab.freedesktop.org/mesa/mesa/issues/1258
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4647>
---
 src/gallium/auxiliary/pipe-loader/driinfo_gallium.h |  1 +
 src/gallium/include/state_tracker/st_api.h          |  1 +
 src/gallium/state_trackers/dri/dri_screen.c         |  2 ++
 src/mesa/state_tracker/st_extensions.c              |  2 ++
 src/util/00-mesa-defaults.conf                      | 10 ++++++++++
 src/util/xmlpool/t_options.h                        |  5 +++++
 6 files changed, 21 insertions(+)

diff --git a/src/gallium/auxiliary/pipe-loader/driinfo_gallium.h b/src/gallium/auxiliary/pipe-loader/driinfo_gallium.h
index 72e979f1ec7..1be9abd87fe 100644
--- a/src/gallium/auxiliary/pipe-loader/driinfo_gallium.h
+++ b/src/gallium/auxiliary/pipe-loader/driinfo_gallium.h
@@ -42,4 +42,5 @@ DRI_CONF_SECTION_MISCELLANEOUS
    DRI_CONF_VS_POSITION_ALWAYS_INVARIANT("false")
    DRI_CONF_ALLOW_RGB10_CONFIGS("true")
    DRI_CONF_ALLOW_FP16_CONFIGS("false")
+   DRI_CONF_FORCE_INTEGER_TEX_NEAREST("false")
 DRI_CONF_SECTION_END
diff --git a/src/gallium/include/state_tracker/st_api.h b/src/gallium/include/state_tracker/st_api.h
index 2d351e0b961..3777449e61d 100644
--- a/src/gallium/include/state_tracker/st_api.h
+++ b/src/gallium/include/state_tracker/st_api.h
@@ -235,6 +235,7 @@ struct st_config_options
    bool allow_glsl_cross_stage_interpolation_mismatch;
    bool allow_glsl_layout_qualifier_on_function_parameters;
    bool allow_draw_out_of_order;
+   bool force_integer_tex_nearest;
    char *force_gl_vendor;
    unsigned char config_options_sha1[20];
 };
diff --git a/src/gallium/state_trackers/dri/dri_screen.c b/src/gallium/state_trackers/dri/dri_screen.c
index 943d6fe0ba8..4f1bf166125 100644
--- a/src/gallium/state_trackers/dri/dri_screen.c
+++ b/src/gallium/state_trackers/dri/dri_screen.c
@@ -84,6 +84,8 @@ dri_fill_st_options(struct dri_screen *screen)
    options->allow_higher_compat_version =
       driQueryOptionb(optionCache, "allow_higher_compat_version");
    options->glsl_zero_init = driQueryOptionb(optionCache, "glsl_zero_init");
+   options->force_integer_tex_nearest =
+      driQueryOptionb(optionCache, "force_integer_tex_nearest");
    options->vs_position_always_invariant =
       driQueryOptionb(optionCache, "vs_position_always_invariant");
    options->force_glsl_abs_sqrt =
diff --git a/src/mesa/state_tracker/st_extensions.c b/src/mesa/state_tracker/st_extensions.c
index 5ddb55f053d..6b102074bfb 100644
--- a/src/mesa/state_tracker/st_extensions.c
+++ b/src/mesa/state_tracker/st_extensions.c
@@ -1205,6 +1205,8 @@ void st_init_extensions(struct pipe_screen *screen,
 
    consts->GLSLZeroInit = options->glsl_zero_init;
 
+   consts->ForceIntegerTexNearest = options->force_integer_tex_nearest;
+
    consts->VendorOverride = options->force_gl_vendor;
 
    consts->UniformBooleanTrue = consts->NativeIntegers ? ~0U : fui(1.0f);
diff --git a/src/util/00-mesa-defaults.conf b/src/util/00-mesa-defaults.conf
index ea9eb0d1965..d2a82b2a19a 100644
--- a/src/util/00-mesa-defaults.conf
+++ b/src/util/00-mesa-defaults.conf
@@ -268,6 +268,16 @@ TODO: document the other workarounds.
             <option name="glsl_zero_init" value="true" />
         </application>
 
+        <application name="GRID Autosport" executable="GridAutosport">
+            <!-- https://gitlab.freedesktop.org/mesa/mesa/issues/1258 -->
+            <option name="force_integer_tex_nearest" value="true" />
+        </application>
+
+        <application name="DIRT: Showdown" executable="dirt.i386">
+            <!-- https://gitlab.freedesktop.org/mesa/mesa/issues/1258 -->
+            <option name="force_integer_tex_nearest" value="true" />
+        </application>
+
         <!-- The GL thread whitelist is below, workarounds are above.
              Keep it that way. -->
 
diff --git a/src/util/xmlpool/t_options.h b/src/util/xmlpool/t_options.h
index bfa3a80b6ac..0dbac8e0479 100644
--- a/src/util/xmlpool/t_options.h
+++ b/src/util/xmlpool/t_options.h
@@ -309,6 +309,11 @@ DRI_CONF_OPT_BEGIN_B(allow_fp16_configs, def) \
 DRI_CONF_DESC(en,gettext("Allow exposure of visuals and fbconfigs with fp16 formats")) \
 DRI_CONF_OPT_END
 
+#define DRI_CONF_FORCE_INTEGER_TEX_NEAREST(def) \
+DRI_CONF_OPT_BEGIN_B(force_integer_tex_nearest, def) \
+        DRI_CONF_DESC(en,gettext("Force integer textures to use nearest filtering")) \
+DRI_CONF_OPT_END
+
 /**
  * \brief Initialization configuration options
  */
-- 
2.30.2