1/*
2 Simple DirectMedia Layer
3 Copyright (C) 1997-2025 Sam Lantinga <slouken@libsdl.org>
4
5 This software is provided 'as-is', without any express or implied
6 warranty. In no event will the authors be held liable for any damages
7 arising from the use of this software.
8
9 Permission is granted to anyone to use this software for any purpose,
10 including commercial applications, and to alter it and redistribute it
11 freely, subject to the following restrictions:
12
13 1. The origin of this software must not be misrepresented; you must not
14 claim that you wrote the original software. If you use this software
15 in a product, an acknowledgment in the product documentation would be
16 appreciated but is not required.
17 2. Altered source versions must be plainly marked as such, and must not be
18 misrepresented as being the original software.
19 3. This notice may not be removed or altered from any source distribution.
20*/
21#include "SDL_internal.h"
22
23#ifdef SDL_VIDEO_DRIVER_X11
24
25#define DEBUG_DYNAMIC_X11 0
26
27#include "SDL_x11dyn.h"
28
29#if DEBUG_DYNAMIC_X11
30#include <stdio.h>
31#endif
32
33#ifdef SDL_VIDEO_DRIVER_X11_DYNAMIC
34
35typedef struct
36{
37 SDL_SharedObject *lib;
38 const char *libname;
39} x11dynlib;
40
41#ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC_XEXT
42#define SDL_VIDEO_DRIVER_X11_DYNAMIC_XEXT NULL
43#endif
44#ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC_XCURSOR
45#define SDL_VIDEO_DRIVER_X11_DYNAMIC_XCURSOR NULL
46#endif
47#ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC_XINPUT2
48#define SDL_VIDEO_DRIVER_X11_DYNAMIC_XINPUT2 NULL
49#endif
50#ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC_XFIXES
51#define SDL_VIDEO_DRIVER_X11_DYNAMIC_XFIXES NULL
52#endif
53#ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC_XRANDR
54#define SDL_VIDEO_DRIVER_X11_DYNAMIC_XRANDR NULL
55#endif
56#ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC_XSS
57#define SDL_VIDEO_DRIVER_X11_DYNAMIC_XSS NULL
58#endif
59#ifndef SDL_VIDEO_DRIVER_X11_DYNAMIC_XTEST
60#define SDL_VIDEO_DRIVER_X11_DYNAMIC_XTEST NULL
61#endif
62
63static x11dynlib x11libs[] = {
64 { NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC },
65 { NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC_XEXT },
66 { NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC_XCURSOR },
67 { NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC_XINPUT2 },
68 { NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC_XFIXES },
69 { NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC_XRANDR },
70 { NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC_XSS },
71 { NULL, SDL_VIDEO_DRIVER_X11_DYNAMIC_XTEST }
72};
73
74static void *X11_GetSym(const char *fnname, int *pHasModule)
75{
76 int i;
77 void *fn = NULL;
78 for (i = 0; i < SDL_arraysize(x11libs); i++) {
79 if (x11libs[i].lib) {
80 fn = SDL_LoadFunction(x11libs[i].lib, fnname);
81 if (fn) {
82 break;
83 }
84 }
85 }
86
87#if DEBUG_DYNAMIC_X11
88 if (fn)
89 printf("X11: Found '%s' in %s (%p)\n", fnname, x11libs[i].libname, fn);
90 else
91 printf("X11: Symbol '%s' NOT FOUND!\n", fnname);
92#endif
93
94 if (!fn) {
95 *pHasModule = 0; // kill this module.
96 }
97
98 return fn;
99}
100
101#endif // SDL_VIDEO_DRIVER_X11_DYNAMIC
102
103// Define all the function pointers and wrappers...
104#define SDL_X11_SYM(rc, fn, params, args, ret) SDL_DYNX11FN_##fn X11_##fn = NULL;
105#include "SDL_x11sym.h"
106
107// Annoying varargs entry point...
108#ifdef X_HAVE_UTF8_STRING
109SDL_DYNX11FN_XCreateIC X11_XCreateIC = NULL;
110SDL_DYNX11FN_XGetICValues X11_XGetICValues = NULL;
111SDL_DYNX11FN_XSetICValues X11_XSetICValues = NULL;
112SDL_DYNX11FN_XVaCreateNestedList X11_XVaCreateNestedList = NULL;
113#endif
114
115/* These SDL_X11_HAVE_* flags are here whether you have dynamic X11 or not. */
116#define SDL_X11_MODULE(modname) int SDL_X11_HAVE_##modname = 0;
117#include "SDL_x11sym.h"
118
119static int x11_load_refcount = 0;
120
121void SDL_X11_UnloadSymbols(void)
122{
123 // Don't actually unload if more than one module is using the libs...
124 if (x11_load_refcount > 0) {
125 if (--x11_load_refcount == 0) {
126#ifdef SDL_VIDEO_DRIVER_X11_DYNAMIC
127 int i;
128#endif
129
130 // set all the function pointers to NULL.
131#define SDL_X11_MODULE(modname) SDL_X11_HAVE_##modname = 0;
132#define SDL_X11_SYM(rc, fn, params, args, ret) X11_##fn = NULL;
133#include "SDL_x11sym.h"
134
135#ifdef X_HAVE_UTF8_STRING
136 X11_XCreateIC = NULL;
137 X11_XGetICValues = NULL;
138 X11_XSetICValues = NULL;
139 X11_XVaCreateNestedList = NULL;
140#endif
141
142#ifdef SDL_VIDEO_DRIVER_X11_DYNAMIC
143 for (i = 0; i < SDL_arraysize(x11libs); i++) {
144 if (x11libs[i].lib) {
145 SDL_UnloadObject(x11libs[i].lib);
146 x11libs[i].lib = NULL;
147 }
148 }
149#endif
150 }
151 }
152}
153
154// returns non-zero if all needed symbols were loaded.
155bool SDL_X11_LoadSymbols(void)
156{
157 bool result = true; // always succeed if not using Dynamic X11 stuff.
158
159 // deal with multiple modules (dga, x11, etc) needing these symbols...
160 if (x11_load_refcount++ == 0) {
161#ifdef SDL_VIDEO_DRIVER_X11_DYNAMIC
162 int i;
163 int *thismod = NULL;
164 for (i = 0; i < SDL_arraysize(x11libs); i++) {
165 if (x11libs[i].libname) {
166 x11libs[i].lib = SDL_LoadObject(x11libs[i].libname);
167 }
168 }
169
170#define SDL_X11_MODULE(modname) SDL_X11_HAVE_##modname = 1; // default yes
171#include "SDL_x11sym.h"
172
173#define SDL_X11_MODULE(modname) thismod = &SDL_X11_HAVE_##modname;
174#define SDL_X11_SYM(a, fn, x, y, z) X11_##fn = (SDL_DYNX11FN_##fn)X11_GetSym(#fn, thismod);
175#include "SDL_x11sym.h"
176
177#ifdef X_HAVE_UTF8_STRING
178 X11_XCreateIC = (SDL_DYNX11FN_XCreateIC)
179 X11_GetSym("XCreateIC", &SDL_X11_HAVE_UTF8);
180 X11_XGetICValues = (SDL_DYNX11FN_XGetICValues)
181 X11_GetSym("XGetICValues", &SDL_X11_HAVE_UTF8);
182 X11_XSetICValues = (SDL_DYNX11FN_XSetICValues)
183 X11_GetSym("XSetICValues", &SDL_X11_HAVE_UTF8);
184 X11_XVaCreateNestedList = (SDL_DYNX11FN_XVaCreateNestedList)
185 X11_GetSym("XVaCreateNestedList", &SDL_X11_HAVE_UTF8);
186#endif
187
188 if (SDL_X11_HAVE_BASEXLIB) {
189 // all required symbols loaded.
190 SDL_ClearError();
191 } else {
192 // in case something got loaded...
193 SDL_X11_UnloadSymbols();
194 result = false;
195 }
196
197#else // no dynamic X11
198
199#define SDL_X11_MODULE(modname) SDL_X11_HAVE_##modname = 1; // default yes
200#define SDL_X11_SYM(a, fn, x, y, z) X11_##fn = (SDL_DYNX11FN_##fn)fn;
201#include "SDL_x11sym.h"
202
203#ifdef X_HAVE_UTF8_STRING
204 X11_XCreateIC = XCreateIC;
205 X11_XGetICValues = XGetICValues;
206 X11_XSetICValues = XSetICValues;
207 X11_XVaCreateNestedList = XVaCreateNestedList;
208#endif
209#endif
210 }
211
212 return result;
213}
214
215#endif // SDL_VIDEO_DRIVER_X11
216