Make DRI2 a serverlayout/serverflags option.

Add xf86DRI2Enabled() to export the value of the setting.

hw/xfree86/common/xf86.h

@@ -71,6 +71,7 @@ extern Bool sbusSlotClaimed;
 #endif
 extern confDRIRec xf86ConfigDRI;
 extern Bool xf86inSuspend;
+extern Bool xf86DRI2Enabled(void);
 
 #define XF86SCRNINFO(p) ((ScrnInfoPtr)dixLookupPrivate(&(p)->devPrivates, \
 						       xf86ScreenKey))

hw/xfree86/common/xf86Config.c

@@ -766,6 +766,7 @@ typedef enum {
     FLAG_AUTO_ADD_DEVICES,
     FLAG_AUTO_ENABLE_DEVICES,
     FLAG_GLX_VISUALS,
+    FLAG_DRI2,
 } FlagValues;
    
 static OptionInfoRec FlagOptions[] = {
@@ -837,16 +838,18 @@ static OptionInfoRec FlagOptions[] = {
 	{0}, FALSE },
   { FLAG_ALLOW_EMPTY_INPUT,     "AllowEmptyInput",              OPTV_BOOLEAN,
         {0}, FALSE },
-  { FLAG_IGNORE_ABI,			"IgnoreABI",			OPTV_BOOLEAN,
+  { FLAG_IGNORE_ABI,		"IgnoreABI",			OPTV_BOOLEAN,
 	{0}, FALSE },
-  { FLAG_USE_DEFAULT_FONT_PATH,  "UseDefaultFontPath",			OPTV_BOOLEAN,
+  { FLAG_USE_DEFAULT_FONT_PATH,  "UseDefaultFontPath",		OPTV_BOOLEAN,
 	{0}, FALSE },
-  { FLAG_AUTO_ADD_DEVICES,       "AutoAddDevices",                      OPTV_BOOLEAN,
+  { FLAG_AUTO_ADD_DEVICES,       "AutoAddDevices",		OPTV_BOOLEAN,
         {0}, TRUE },
-  { FLAG_AUTO_ENABLE_DEVICES,    "AutoEnableDevices",                   OPTV_BOOLEAN,
+  { FLAG_AUTO_ENABLE_DEVICES,    "AutoEnableDevices",		OPTV_BOOLEAN,
         {0}, TRUE },
   { FLAG_GLX_VISUALS,		"GlxVisuals",			OPTV_STRING,
         {0}, FALSE },
+  { FLAG_DRI2,			"DRI2",				OPTV_BOOLEAN,
+	{0}, FALSE },
   { -1,				NULL,				OPTV_NONE,
 	{0}, FALSE },
 };
@@ -1179,9 +1182,23 @@ configServerFlags(XF86ConfFlagsPtr flagsconf, XF86OptionPtr layoutopts)
       xf86Msg(from, "Xinerama: enabled\n");
 #endif
 
+#ifdef DRI2
+    xf86Info.dri2 = FALSE;
+    xf86Info.dri2From = X_DEFAULT;
+    if (xf86GetOptValBool(FlagOptions, FLAG_DRI2, &value)) {
+	xf86Info.dri2 = value;
+	xf86Info.dri2From = X_CONFIG;
+    }
+#endif
+
     return TRUE;
 }
 
+Bool xf86DRI2Enabled(void)
+{
+    return xf86Info.dri2;
+}
+
 /*
  * Locate the core input devices.  These can be specified/located in
  * the following ways, in order of priority:

hw/xfree86/common/xf86Privstr.h

@@ -149,6 +149,9 @@ typedef struct {
     Bool        autoAddDevices; /* Whether to succeed NIDR, or ignore. */
     Bool        autoEnableDevices; /* Whether to enable, or let the client
                                     * control. */
+
+    Bool		dri2;
+    MessageType		dri2From;
 } xf86InfoRec, *xf86InfoPtr;
 
 #ifdef DPMSExtension