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_WAYLAND
24
25#define DEBUG_DYNAMIC_WAYLAND 0
26
27#include "SDL_waylanddyn.h"
28
29#ifdef SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC
30
31typedef struct
32{
33 SDL_SharedObject *lib;
34 const char *libname;
35} waylanddynlib;
36
37static waylanddynlib waylandlibs[] = {
38 { NULL, SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC },
39#ifdef SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC_EGL
40 { NULL, SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC_EGL },
41#endif
42#ifdef SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC_CURSOR
43 { NULL, SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC_CURSOR },
44#endif
45#ifdef SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC_XKBCOMMON
46 { NULL, SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC_XKBCOMMON },
47#endif
48#ifdef SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC_LIBDECOR
49 { NULL, SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC_LIBDECOR },
50#endif
51 { NULL, NULL }
52};
53
54static void *WAYLAND_GetSym(const char *fnname, int *pHasModule, bool required)
55{
56 void *fn = NULL;
57 waylanddynlib *dynlib;
58 for (dynlib = waylandlibs; dynlib->libname; dynlib++) {
59 if (dynlib->lib) {
60 fn = SDL_LoadFunction(dynlib->lib, fnname);
61 if (fn) {
62 break;
63 }
64 }
65 }
66
67#if DEBUG_DYNAMIC_WAYLAND
68 if (fn) {
69 SDL_Log("WAYLAND: Found '%s' in %s (%p)", fnname, dynlib->libname, fn);
70 } else {
71 SDL_Log("WAYLAND: Symbol '%s' NOT FOUND!", fnname);
72 }
73#endif
74
75 if (!fn && required) {
76 *pHasModule = 0; // kill this module.
77 }
78
79 return fn;
80}
81
82#else
83
84#include <wayland-egl.h>
85
86#endif // SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC
87
88// Define all the function pointers and wrappers...
89#define SDL_WAYLAND_MODULE(modname) int SDL_WAYLAND_HAVE_##modname = 0;
90#define SDL_WAYLAND_SYM(rc, fn, params) SDL_DYNWAYLANDFN_##fn WAYLAND_##fn = NULL;
91#define SDL_WAYLAND_SYM_OPT(rc, fn, params) SDL_DYNWAYLANDFN_##fn WAYLAND_##fn = NULL;
92#define SDL_WAYLAND_INTERFACE(iface) const struct wl_interface *WAYLAND_##iface = NULL;
93#include "SDL_waylandsym.h"
94
95static int wayland_load_refcount = 0;
96
97void SDL_WAYLAND_UnloadSymbols(void)
98{
99 // Don't actually unload if more than one module is using the libs...
100 if (wayland_load_refcount > 0) {
101 if (--wayland_load_refcount == 0) {
102#ifdef SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC
103 int i;
104#endif
105
106 // set all the function pointers to NULL.
107#define SDL_WAYLAND_MODULE(modname) SDL_WAYLAND_HAVE_##modname = 0;
108#define SDL_WAYLAND_SYM(rc, fn, params) WAYLAND_##fn = NULL;
109#define SDL_WAYLAND_SYM_OPT(rc, fn, params) WAYLAND_##fn = NULL;
110#define SDL_WAYLAND_INTERFACE(iface) WAYLAND_##iface = NULL;
111#include "SDL_waylandsym.h"
112
113#ifdef SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC
114 for (i = 0; i < SDL_arraysize(waylandlibs); i++) {
115 if (waylandlibs[i].lib) {
116 SDL_UnloadObject(waylandlibs[i].lib);
117 waylandlibs[i].lib = NULL;
118 }
119 }
120#endif
121 }
122 }
123}
124
125// returns non-zero if all needed symbols were loaded.
126bool SDL_WAYLAND_LoadSymbols(void)
127{
128 bool result = true; // always succeed if not using Dynamic WAYLAND stuff.
129
130 // deal with multiple modules (dga, wayland, etc) needing these symbols...
131 if (wayland_load_refcount++ == 0) {
132#ifdef SDL_VIDEO_DRIVER_WAYLAND_DYNAMIC
133 int i;
134 int *thismod = NULL;
135 for (i = 0; i < SDL_arraysize(waylandlibs); i++) {
136 if (waylandlibs[i].libname) {
137 waylandlibs[i].lib = SDL_LoadObject(waylandlibs[i].libname);
138 }
139 }
140
141#define SDL_WAYLAND_MODULE(modname) SDL_WAYLAND_HAVE_##modname = 1; // default yes
142#include "SDL_waylandsym.h"
143
144#define SDL_WAYLAND_MODULE(modname) thismod = &SDL_WAYLAND_HAVE_##modname;
145#define SDL_WAYLAND_SYM(rc, fn, params) WAYLAND_##fn = (SDL_DYNWAYLANDFN_##fn)WAYLAND_GetSym(#fn, thismod, true);
146#define SDL_WAYLAND_SYM_OPT(rc, fn, params) WAYLAND_##fn = (SDL_DYNWAYLANDFN_##fn)WAYLAND_GetSym(#fn, thismod, false);
147#define SDL_WAYLAND_INTERFACE(iface) WAYLAND_##iface = (struct wl_interface *)WAYLAND_GetSym(#iface, thismod, true);
148#include "SDL_waylandsym.h"
149
150 if (SDL_WAYLAND_HAVE_WAYLAND_CLIENT &&
151 SDL_WAYLAND_HAVE_WAYLAND_CURSOR &&
152 SDL_WAYLAND_HAVE_WAYLAND_EGL &&
153 SDL_WAYLAND_HAVE_WAYLAND_XKB) {
154 // All required symbols loaded, only libdecor is optional.
155 SDL_ClearError();
156 } else {
157 // in case something got loaded...
158 SDL_WAYLAND_UnloadSymbols();
159 result = false;
160 }
161
162#else // no dynamic WAYLAND
163
164#define SDL_WAYLAND_MODULE(modname) SDL_WAYLAND_HAVE_##modname = 1; // default yes
165#define SDL_WAYLAND_SYM(rc, fn, params) WAYLAND_##fn = fn;
166#define SDL_WAYLAND_SYM_OPT(rc, fn, params) WAYLAND_##fn = fn;
167#define SDL_WAYLAND_INTERFACE(iface) WAYLAND_##iface = &iface;
168#include "SDL_waylandsym.h"
169
170#endif
171 }
172
173 return result;
174}
175
176#endif // SDL_VIDEO_DRIVER_WAYLAND
177