Add new extension enable/disable feature. This code is a small step in the

right direction -- i.e., moving towards full run-time config of
    extensions. Currently, only XTEST, XINERAMA, RENDER, XKB, and XEVIE are
    supported.

hw/dmx/dmx.h

@@ -283,9 +283,6 @@ extern Bool             dmxUseXKB;              /**< True if the XKB
                                                  * servers */
 extern int              dmxDepth;               /**< Requested depth if
                                                  * non-zero */
-extern Bool             dmxNoRender;            /**< True if the RENDER
-                                                 * extension should be
-                                                 * disabled */
 #ifdef GLXEXT
 extern Bool             dmxGLXProxy;            /**< True if glxProxy
 						 * support is enabled */

hw/dmx/dmxinit.c

@@ -101,8 +101,6 @@ Bool            dmxUseXKB = TRUE;
 
 int             dmxDepth = 0;
 
-Bool            dmxNoRender = FALSE;
-
 #ifndef GLXEXT
 static Bool     dmxGLXProxy = FALSE;
 #else
@@ -625,7 +623,7 @@ void InitOutput(ScreenInfo *pScreenInfo, int argc, char *argv[])
     }
 
     /* Make sure that the command-line arguments are sane. */
-    if (dmxAddRemoveScreens && (!dmxNoRender || dmxGLXProxy)) {
+    if (dmxAddRemoveScreens && (!noRenderExtension || dmxGLXProxy)) {
 	/* Currently it is not possible to support GLX and Render
 	 * extensions with dynamic screen addition/removal due to the
 	 * state that each extension keeps, which cannot be restored. */
@@ -804,7 +802,7 @@ void InitOutput(ScreenInfo *pScreenInfo, int argc, char *argv[])
 
 #ifdef RENDER
     /* Initialize the render extension */
-    if (!dmxNoRender)
+    if (!noRenderExtension)
 	dmxInitRender();
 #endif
 
@@ -939,7 +937,7 @@ int ddxProcessArgument(int argc, char *argv[], int i)
         if (++i < argc) dmxDepth = atoi(argv[i]);
         retval = 2;
     } else if (!strcmp(argv[i], "-norender")) {
-	dmxNoRender = TRUE;
+	noRenderExtension = TRUE;
         retval = 1;
 #ifdef GLXEXT
     } else if (!strcmp(argv[i], "-noglxproxy")) {

hw/dmx/dmxwindow.c

@@ -379,13 +379,6 @@ Bool dmxCreateWindow(WindowPtr pWindow)
     return ret;
 }
 
-#ifndef RENDER
-static Bool dmxDestroyPictureList(WindowPtr pWindow)
-{
-    return TRUE;
-}
-#endif
-
 /** Destroy \a pWindow on the back-end server. */
 Bool dmxBEDestroyWindow(WindowPtr pWindow)
 {
@@ -409,16 +402,21 @@ Bool dmxDestroyWindow(WindowPtr pWindow)
     ScreenPtr      pScreen = pWindow->drawable.pScreen;
     DMXScreenInfo *dmxScreen = &dmxScreens[pScreen->myNum];
     Bool           ret = TRUE;
+    Bool           needSync = FALSE;
 #ifdef GLXEXT
     dmxWinPrivPtr  pWinPriv = DMX_GET_WINDOW_PRIV(pWindow);
 #endif
 
     DMX_UNWRAP(DestroyWindow, dmxScreen, pScreen);
 
+#ifdef RENDER
+    /* Destroy any picture list associated with this window */
+    needSync |= dmxDestroyPictureList(pWindow);
+#endif
+
     /* Destroy window on back-end server */
-    if (dmxDestroyPictureList(pWindow) || dmxBEDestroyWindow(pWindow)) {
+    needSync |= dmxBEDestroyWindow(pWindow);
-	dmxSync(dmxScreen, FALSE);
+    if (needSync) dmxSync(dmxScreen, FALSE);
-    }
 
 #ifdef GLXEXT
     if (pWinPriv->swapGroup && pWinPriv->windowDestroyed)

include/globals.h

@@ -1,4 +1,4 @@
-/* $XdotOrg$ */
+/* $XdotOrg: xc/programs/Xserver/include/globals.h,v 1.2 2004/04/23 19:54:23 eich Exp $ */
 /* $XFree86: xc/programs/Xserver/include/globals.h,v 1.3 1999/09/25 14:38:21 dawes Exp $ */
 
 #ifndef _XSERV_GLOBAL_H_
@@ -49,5 +49,12 @@ extern Bool PanoramiXWindowExposureSent;
 extern Bool PanoramiXOneExposeRequest;
 #endif
 
+#ifdef RENDER
+extern Bool noRenderExtension;
+#endif
+
+#ifdef XEVIE
+extern Bool noXevieExtension;
+#endif
 
 #endif /* _XSERV_GLOBAL_H_ */

mi/miinitext.c

@@ -1,4 +1,4 @@
-/* $XdotOrg: xc/programs/Xserver/mi/miinitext.c,v 1.5 2004/07/29 18:49:42 stukreit Exp $ */
+/* $XdotOrg: xc/programs/Xserver/mi/miinitext.c,v 1.6 2004/07/31 01:37:47 stukreit Exp $ */
 /* $XFree86: xc/programs/Xserver/mi/miinitext.c,v 3.67 2003/01/12 02:44:27 dawes Exp $ */
 /***********************************************************
 
@@ -95,9 +95,11 @@ extern Bool noTestExtensions;
 #ifdef XKB
 extern Bool noXkbExtension;
 #endif
-
+#ifdef RENDER
-#ifdef DMXSERVER
+extern Bool noRenderExtension;
-extern Bool dmxNoRender;
+#endif
+#ifdef XEVIE
+extern Bool noXevieExtension;
 #endif
 
 #ifndef XFree86LOADER
@@ -281,6 +283,52 @@ extern void XFixesExtensionInit(INITARGS);
 extern void DamageExtensionInit(INITARGS);
 #endif
 
+/* The following is only a small first step towards run-time
+ * configurable extensions.
+ */
+typedef struct {
+    char *name;
+    Bool *disablePtr;
+} ExtensionToggle;
+
+static ExtensionToggle ExtensionToggleList[] =
+{
+    { "XTEST", &noTestExtensions },
+#ifdef PANORAMIX
+    { "XINERAMA", &noPanoramiXExtension },
+#endif
+#ifdef RENDER
+    { "RENDER", &noRenderExtension },
+#endif
+#ifdef XKB
+    { "XKEYBOARD", &noXkbExtension },
+#endif
+#ifdef XEVIE
+    { "XEVIE", &noXevieExtension },
+#endif
+    { NULL, NULL }
+};
+
+Bool EnableDisableExtension(char *name, Bool enable)
+{
+    ExtensionToggle *ext = &ExtensionToggleList[0];
+
+    for (ext = &ExtensionToggleList[0]; ext->name != NULL; ext++) {
+	if (strcmp(name, ext->name) == 0) {
+	    *ext->disablePtr = !enable;
+	    return TRUE;
+	}
+    }
+
+    ErrorF("Extension \"%s\" is not recognized\n", name);
+    ErrorF("Only the following extensions can be run-time %s:\n",
+	   enable ? "enabled" : "disabled");
+    for (ext = &ExtensionToggleList[0]; ext->name != NULL; ext++)
+	ErrorF("    %s\n", ext->name);
+
+    return FALSE;
+}
+
 #ifndef XFree86LOADER
 
 /*ARGSUSED*/
@@ -409,10 +457,7 @@ InitExtensions(argc, argv)
 #endif
 #endif
 #ifdef RENDER
-#ifdef DMXSERVER
+    if (!noRenderExtension) RenderExtensionInit();
-    if (!dmxNoRender)
-#endif
-    RenderExtensionInit();
 #endif
 #ifdef RANDR
     RRExtensionInit();
@@ -424,7 +469,7 @@ InitExtensions(argc, argv)
     DMXExtensionInit();
 #endif
 #ifdef XEVIE
-    XevieExtensionInit();
+    if (!noXevieExtension) XevieExtensionInit();
 #endif
 #ifdef XFIXES
     XFixesExtensionInit();
@@ -549,7 +594,7 @@ static ExtensionModule staticExtensions[] = {
     { XFree86BigfontExtensionInit, XF86BIGFONTNAME, NULL, NULL, NULL },
 #endif
 #ifdef RENDER
-    { RenderExtensionInit, "RENDER", NULL, NULL, NULL },
+    { RenderExtensionInit, "RENDER", &noRenderExtension, NULL, NULL },
 #endif
 #ifdef RANDR
     { RRExtensionInit, "RANDR", NULL, NULL, NULL },
@@ -561,7 +606,7 @@ static ExtensionModule staticExtensions[] = {
     { XFixesExtensionInit, "XFIXES", NULL, NULL },
 #endif 
 #ifdef XEVIE
-    { XevieExtensionInit, "XEVIE", NULL, NULL },
+    { XevieExtensionInit, "XEVIE", &noXevieExtension, NULL },
 #endif 
     { NULL, NULL, NULL, NULL, NULL }
 };

os/utils.c

@@ -1,4 +1,4 @@
-/* $XdotOrg: xc/programs/Xserver/os/utils.c,v 1.2 2004/04/23 19:54:28 eich Exp $ */
+/* $XdotOrg: xc/programs/Xserver/os/utils.c,v 1.3 2004/06/19 21:56:01 gisburn Exp $ */
 /* $Xorg: utils.c,v 1.5 2001/02/09 02:05:24 xorgcvs Exp $ */
 /*
 
@@ -119,6 +119,7 @@ OR PERFORMANCE OF THIS SOFTWARE.
 
 #ifdef RENDER
 #include "picture.h"
+Bool noRenderExtension = FALSE;
 #endif
 
 #define X_INCLUDE_NETDB_H
@@ -137,6 +138,10 @@ Bool PanoramiXWindowExposureSent = FALSE;
 Bool PanoramiXOneExposeRequest = FALSE;
 #endif
 
+#ifdef XEVIE
+Bool noXevieExtension = TRUE;
+#endif
+
 int auditTrailLevel = 1;
 
 Bool Must_have_memory = FALSE;
@@ -170,6 +175,9 @@ char *dev_tty_from_init = NULL;		/* since we need to parse it anyway */
 
 extern char dispatchExceptionAtReset;
 
+/* Extension enable/disable in miinitext.c */
+extern Bool EnableDisableExtension(char *name, Bool enable);
+
 OsSigHandlerPtr
 OsSignal(sig, handler)
     int sig;
@@ -549,6 +557,8 @@ void UseMsg(void)
     ErrorF("-dumbSched             Disable smart scheduling, enable old behavior\n");
     ErrorF("-schedInterval int     Set scheduler interval in msec\n");
 #endif
+    ErrorF("+extension name        Enable extension\n");
+    ErrorF("-extension name        Disable extension\n");
 #ifdef XDMCP
     XdmcpUseMsg();
 #endif
@@ -999,6 +1009,16 @@ ProcessCommandLine(int argc, char *argv[])
 		UseMsg ();
 	}
 #endif
+	else if ( strcmp( argv[i], "+extension") == 0)
+	{
+	    if (++i >= argc || !EnableDisableExtension(argv[i], TRUE))
+		UseMsg();
+	}
+	else if ( strcmp( argv[i], "-extension") == 0)
+	{
+	    if (++i >= argc || !EnableDisableExtension(argv[i], FALSE))
+		UseMsg();
+	}
  	else
  	{
 	    ErrorF("Unrecognized option: %s\n", argv[i]);