this patch allows divinity original sin to run

mesa_vendor_override_ati.patch

diff --git a/src/mesa/main/getstring.c b/src/mesa/main/getstring.c
index 3d5ae0b694..b5116c6029 100644
--- a/src/mesa/main/getstring.c
+++ b/src/mesa/main/getstring.c
@@ -123,6 +123,13 @@ _mesa_GetString( GLenum name )
 
    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL);
 
+   boolean *forcedvendor = getenv("allow_vendor_override_ati");
+   if ((forcedvendor) && (name==GL_VENDOR)) {
+       if (ctx->Driver.GetString(ctx, name)=="X.Org") {
+          return (const GLubyte *) "ATI Technologies, Inc.";
+       }
+   }
+
    /* this is a required driver function */
    assert(ctx->Driver.GetString);
    {
diff --git a/src/util/00-mesa-defaults.conf b/src/util/00-mesa-defaults.conf
index cb0e6e659e..ccc6d16e93 100644
--- a/src/util/00-mesa-defaults.conf
+++ b/src/util/00-mesa-defaults.conf
@@ -128,6 +128,7 @@ TODO: document the other workarounds.
 
         <application name="Divinity: Original Sin Enhanced Edition" executable="EoCApp">
             <option name="allow_glsl_extension_directive_midshader" value="true" />
+            <option name="allow_vendor_override_ati" value="true"/>
         </application>
 
         <application name="Metro 2033 Redux / Metro Last Night Redux" executable="metro">
diff --git a/src/gallium/state_trackers/dri/dri_context.c b/src/gallium/state_trackers/dri/dri_context.c
index af9e3325f9..873bd72e29 100644
--- a/src/gallium/state_trackers/dri/dri_context.c
+++ b/src/gallium/state_trackers/dri/dri_context.c
@@ -79,6 +79,10 @@ dri_create_context(gl_api api, const struct gl_config * visual,
       goto fail;
    }
 
+   if (driQueryOptionb(optionCache, "allow_vendor_override_ati")) {
+      setenv("allow_vendor_override_ati", "true", 1);
+   }
+
    memset(&attribs, 0, sizeof(attribs));
    switch (api) {
    case API_OPENGLES:
diff --git a/src/gallium/auxiliary/pipe-loader/driinfo_gallium.h b/src/gallium/auxiliary/pipe-loader/driinfo_gallium.h
index 9db0dc0111..932e7a5ab7 100644
--- a/src/gallium/auxiliary/pipe-loader/driinfo_gallium.h
+++ b/src/gallium/auxiliary/pipe-loader/driinfo_gallium.h
@@ -31,6 +31,7 @@ DRI_CONF_SECTION_DEBUG
    DRI_CONF_GLSL_CORRECT_DERIVATIVES_AFTER_DISCARD("false")
    DRI_CONF_ALLOW_GLSL_LAYOUT_QUALIFIER_ON_FUNCTION_PARAMETERS("false")
    DRI_CONF_FORCE_COMPAT_PROFILE("false")
+   DRI_CONF_ALLOW_VENDOR_OVERRIDE_ATI("false")
 DRI_CONF_SECTION_END
 
 DRI_CONF_SECTION_MISCELLANEOUS
diff --git a/src/glx/glxcmds.c b/src/glx/glxcmds.c
index bde461b43a..044dc9174f 100644
--- a/src/glx/glxcmds.c
+++ b/src/glx/glxcmds.c
@@ -2603,6 +2603,13 @@ _GLX_PUBLIC void (*glXGetProcAddressARB(const GLubyte * procName)) (void)
    typedef void (*gl_function) (void);
    gl_function f;
 
+   if (strcmp((const char *) procName, "glNamedStringARB") == 0 ||
+       strcmp((const char *) procName, "glDeleteNamedStringARB") == 0 ||
+       strcmp((const char *) procName, "glCompileShaderIncludeARB") == 0 ||
+       strcmp((const char *) procName, "glIsNamedStringARB") == 0 ||
+       strcmp((const char *) procName, "glGetNamedStringARB") == 0 ||
+       strcmp((const char *) procName, "glGetNamedStringivARB") == 0)
+      return NULL;
 
    /* Search the table of GLX and internal functions first.  If that
     * fails and the supplied name could be a valid core GL name, try
diff --git a/src/util/xmlpool/t_options.h b/src/util/xmlpool/t_options.h
index 80ddf0e203..7c2b9212ff 100644
--- a/src/util/xmlpool/t_options.h
+++ b/src/util/xmlpool/t_options.h
@@ -140,6 +140,11 @@ DRI_CONF_OPT_BEGIN_B(allow_glsl_layout_qualifier_on_function_parameters, def) \
         DRI_CONF_DESC(en,gettext("Allow layout qualifiers on function parameters.")) \
 DRI_CONF_OPT_END
 
+#define DRI_CONF_ALLOW_VENDOR_OVERRIDE_ATI(def) \
+DRI_CONF_OPT_BEGIN_B(allow_vendor_override_ati, def) \
+        DRI_CONF_DESC(en,gettext("Allow GPU vendor to be overridden as ATI Technologies, Inc.")) \
+DRI_CONF_OPT_END
+
 #define DRI_CONF_FORCE_COMPAT_PROFILE(def) \
 DRI_CONF_OPT_BEGIN_B(force_compat_profile, def) \
         DRI_CONF_DESC(en,gettext("Force an OpenGL compatibility context")) \