st/mesa,gallium: add a workaround for Unigine Heaven 4.0 and Valley 1.0

Most (all?) Unigine shaders fail to compile without this if sample shading
is advertised. This is, of course, Unigine developers' fault.

Reviewed-by: Brian Paul <[email protected]>

3 files changed, 25 insertions, 3 deletions

diff --git a/src/mesa/drivers/dri/common/drirc b/src/mesa/drivers/dri/common/drirc
index ebc04cd9bf7..4b9841bd262 100644
--- a/src/mesa/drivers/dri/common/drirc
+++ b/src/mesa/drivers/dri/common/drirc
@@ -11,17 +11,21 @@ Application bugs worked around in this file:
   is still 1.10.
 
 * Unigine Heaven 3.0 with ARB_texture_multisample uses a "ivec4 * vec4"
-  expression, which fails to compile with GLSL 1.10.
+  expression, which is illegal in GLSL 1.10.
   Adding "#version 130" fixes this.
 
 * Unigine Heaven 3.0 with ARB_shader_bit_encoding uses the uint keyword, which
-  fails to compile with GLSL 1.10.
+  is illegal in GLSL 1.10.
   Adding "#version 130" fixes this.
 
 * Unigine Heaven 3.0 with ARB_shader_bit_encoding uses a "uint & int"
-  expression, which fails (and should fail) to compile with any GLSL version.
+  expression, which is illegal in any GLSL version.
   Disabling ARB_shader_bit_encoding fixes this.
 
+* If ARB_sample_shading is supported, Unigine Heaven 4.0 and Valley 1.0 uses
+  an #extension directive in the middle of its shaders, which is illegal
+  in GLSL.
+
 TODO: document the other workarounds.
 
 -->
@@ -45,6 +49,7 @@ TODO: document the other workarounds.
             <option name="disable_blend_func_extended" value="true" />
             <option name="force_glsl_version" value="130" />
             <option name="disable_shader_bit_encoding" value="true" />
+            <option name="allow_glsl_extension_directive_midshader" value="true" />
 	</application>
 
         <application name="Unigine Heaven (64-bit)" executable="heaven_x64">
@@ -52,6 +57,15 @@ TODO: document the other workarounds.
             <option name="disable_blend_func_extended" value="true" />
             <option name="force_glsl_version" value="130" />
             <option name="disable_shader_bit_encoding" value="true" />
+            <option name="allow_glsl_extension_directive_midshader" value="true" />
+	</application>
+
+        <application name="Unigine Valley (32-bit)" executable="valley_x86">
+            <option name="allow_glsl_extension_directive_midshader" value="true" />
+	</application>
+
+        <application name="Unigine Valley (64-bit)" executable="valley_x64">
+            <option name="allow_glsl_extension_directive_midshader" value="true" />
 	</application>
 
         <application name="Unigine OilRush (32-bit)" executable="OilRush_x86">
diff --git a/src/mesa/drivers/dri/common/xmlpool/t_options.h b/src/mesa/drivers/dri/common/xmlpool/t_options.h
index fc9e10461c5..b73a6620ce8 100644
--- a/src/mesa/drivers/dri/common/xmlpool/t_options.h
+++ b/src/mesa/drivers/dri/common/xmlpool/t_options.h
@@ -105,6 +105,11 @@ DRI_CONF_OPT_BEGIN_V(force_glsl_version, int, def, "0:999") \
         DRI_CONF_DESC(en,gettext("Force a default GLSL version for shaders that lack an explicit #version line")) \
 DRI_CONF_OPT_END
 
+#define DRI_CONF_ALLOW_GLSL_EXTENSION_DIRECTIVE_MIDSHADER(def) \
+DRI_CONF_OPT_BEGIN_B(allow_glsl_extension_directive_midshader, def) \
+        DRI_CONF_DESC(en,gettext("Allow GLSL #extension directives in the middle of shaders")) \
+DRI_CONF_OPT_END
+
 
 
 /**
diff --git a/src/mesa/state_tracker/st_extensions.c b/src/mesa/state_tracker/st_extensions.c
index 4207cb64a3a..aa59fbfa986 100644
--- a/src/mesa/state_tracker/st_extensions.c
+++ b/src/mesa/state_tracker/st_extensions.c
@@ -772,6 +772,9 @@ void st_init_extensions(struct st_context *st)
    if (st->options.disable_glsl_line_continuations)
       ctx->Const.DisableGLSLLineContinuations = 1;
 
+   if (st->options.allow_glsl_extension_directive_midshader)
+      ctx->Const.AllowGLSLExtensionDirectiveMidShader = GL_TRUE;
+
    ctx->Const.MinMapBufferAlignment =
       screen->get_param(screen, PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT);