--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/video/x11/SDL_x11dyn.c	Wed Jul 26 06:34:54 2006 +0000
@@ -0,0 +1,184 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2004 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public
+    License along with this library; if not, write to the Free
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+#define DEBUG_DYNAMIC_X11 0
+
+#include "SDL_x11dyn.h"
+
+#if DEBUG_DYNAMIC_X11
+#include <stdio.h>
+#endif
+
+#ifdef SDL_VIDEO_DRIVER_X11_DYNAMIC
+
+#include "SDL_name.h"
+#include "SDL_loadso.h"
+
+typedef struct
+{
+    void *lib;
+    const char *libname;
+} x11dynlib;
+
+#ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC
+#define SDL_VIDEO_DRIVER_X11_DYNAMIC NULL
+#endif
+#ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC_XEXT
+#define SDL_VIDEO_DRIVER_X11_DYNAMIC_XEXT NULL
+#endif
+#ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC_XRENDER
+#define SDL_VIDEO_DRIVER_X11_DYNAMIC_XRENDER NULL
+#endif
+#ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC_XRANDR
+#define SDL_VIDEO_DRIVER_X11_DYNAMIC_XRANDR NULL
+#endif
+
+static x11dynlib x11libs[] = {
+    {NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC},
+    {NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC_XEXT},
+    {NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC_XRENDER},
+    {NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC_XRANDR},
+};
+
+static void
+X11_GetSym(const char *fnname, int *rc, void **fn)
+{
+    int i;
+    for (i = 0; i < SDL_TABLESIZE(x11libs); i++) {
+        if (x11libs[i].lib != NULL) {
+            *fn = SDL_LoadFunction(x11libs[i].lib, fnname);
+            if (*fn != NULL)
+                break;
+        }
+    }
+
+#if DEBUG_DYNAMIC_X11
+    if (*fn != NULL)
+        printf("X11: Found '%s' in %s (%p)\n", fnname, x11libs[i].libname,
+               *fn);
+    else
+        printf("X11: Symbol '%s' NOT FOUND!\n", fnname);
+#endif
+
+    if (*fn == NULL)
+        *rc = 0;                /* kill this module. */
+}
+
+
+/* Define all the function pointers and wrappers... */
+#define SDL_X11_MODULE(modname)
+#define SDL_X11_SYM(rc,fn,params,args,ret) \
+	static rc (*p##fn) params = NULL; \
+	rc fn params { ret p##fn args ; }
+#include "SDL_x11sym.h"
+#undef SDL_X11_MODULE
+#undef SDL_X11_SYM
+#endif /* SDL_VIDEO_DRIVER_X11_DYNAMIC */
+
+/* Annoying varargs entry point... */
+#ifdef X_HAVE_UTF8_STRING
+XIC(*pXCreateIC) (XIM,...) = NULL;
+#endif
+
+/* These SDL_X11_HAVE_* flags are here whether you have dynamic X11 or not. */
+#define SDL_X11_MODULE(modname) int SDL_X11_HAVE_##modname = 1;
+#define SDL_X11_SYM(rc,fn,params,args,ret)
+#include "SDL_x11sym.h"
+#undef SDL_X11_MODULE
+#undef SDL_X11_SYM
+
+
+static int x11_load_refcount = 0;
+
+void
+SDL_X11_UnloadSymbols(void)
+{
+#ifdef SDL_VIDEO_DRIVER_X11_DYNAMIC
+    /* Don't actually unload if more than one module is using the libs... */
+    if (x11_load_refcount > 0) {
+        if (--x11_load_refcount == 0) {
+            int i;
+
+            /* set all the function pointers to NULL. */
+#define SDL_X11_MODULE(modname) SDL_X11_HAVE_##modname = 1;
+#define SDL_X11_SYM(rc,fn,params,args,ret) p##fn = NULL;
+#include "SDL_x11sym.h"
+#undef SDL_X11_MODULE
+#undef SDL_X11_SYM
+
+#ifdef X_HAVE_UTF8_STRING
+            pXCreateIC = NULL;
+#endif
+
+            for (i = 0; i < SDL_TABLESIZE(x11libs); i++) {
+                if (x11libs[i].lib != NULL) {
+                    SDL_UnloadObject(x11libs[i].lib);
+                    x11libs[i].lib = NULL;
+                }
+            }
+        }
+    }
+#endif
+}
+
+/* returns non-zero if all needed symbols were loaded. */
+int
+SDL_X11_LoadSymbols(void)
+{
+    int rc = 1;                 /* always succeed if not using Dynamic X11 stuff. */
+
+#ifdef SDL_VIDEO_DRIVER_X11_DYNAMIC
+    /* deal with multiple modules (dga, x11, etc) needing these symbols... */
+    if (x11_load_refcount++ == 0) {
+        int i;
+        int *thismod = NULL;
+        for (i = 0; i < SDL_TABLESIZE(x11libs); i++) {
+            if (x11libs[i].libname != NULL) {
+                x11libs[i].lib = SDL_LoadObject(x11libs[i].libname);
+            }
+        }
+#define SDL_X11_MODULE(modname) thismod = &SDL_X11_HAVE_##modname;
+#define SDL_X11_SYM(a,fn,x,y,z) X11_GetSym(#fn,thismod,(void**)&p##fn);
+#include "SDL_x11sym.h"
+#undef SDL_X11_MODULE
+#undef SDL_X11_SYM
+
+#ifdef X_HAVE_UTF8_STRING
+        X11_GetSym("XCreateIC", &SDL_X11_HAVE_UTF8, (void **) &pXCreateIC);
+#endif
+
+        if (!SDL_X11_HAVE_BASEXLIB) {   /* some required symbol didn't load. */
+            SDL_X11_UnloadSymbols();    /* in case something got loaded... */
+            rc = 0;
+        }
+    }
+#else
+#ifdef X_HAVE_UTF8_STRING
+    pXCreateIC = XCreateIC;
+#endif
+#endif
+
+    return rc;
+}
+
+/* vi: set ts=4 sw=4 expandtab: */