/*

SDL - Simple DirectMedia Layer

Copyright (C) 1997-2009 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 = NULL;

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. */

return fn;

}

/* 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;

char *(*pXGetICValues)(XIC, ...) = 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;

pXGetICValues = 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(rc,fn,params,args,ret) \

p##fn = (rc(*)params) X11_GetSym(#fn, thismod);

#include "SDL_x11sym.h"

#undef SDL_X11_MODULE

#undef SDL_X11_SYM

#ifdef X_HAVE_UTF8_STRING

pXCreateIC = (XIC(*)(XIM,...)) X11_GetSym("XCreateIC",

&SDL_X11_HAVE_UTF8);

pXGetICValues = (char * (*)(XIC,...)) X11_GetSym("XGetICValues",

&SDL_X11_HAVE_UTF8);

#endif

if (SDL_X11_HAVE_BASEXLIB) { /* all required symbols loaded. */

SDL_ClearError();

} else {

SDL_X11_UnloadSymbols(); /* in case something got loaded... */

rc = 0;

}

}

#else

#if DEBUG_DYNAMIC_X11

printf("X11: No dynamic X11 support in this build of SDL.\n");

#endif

#ifdef X_HAVE_UTF8_STRING

pXCreateIC = XCreateIC;

pXGetICValues = XGetICValues;

#endif

#endif

return rc;

}

/* end of SDL_x11dyn.c ... */