1 /*
2 Simple DirectMedia Layer
3 Copyright (C) 1997-2020 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 #if SDL_VIDEO_DRIVER_DIRECTFB
24
25 #include "SDL_DirectFB_video.h"
26 #include "SDL_DirectFB_dyn.h"
27
28 #ifdef SDL_VIDEO_DRIVER_DIRECTFB_DYNAMIC
29 #include "SDL_name.h"
30 #include "SDL_loadso.h"
31
32 #define DFB_SYM(ret, name, args, al, func) ret (*name) args;
33 static struct _SDL_DirectFB_Symbols
34 {
35 DFB_SYMS
36 const unsigned int *directfb_major_version;
37 const unsigned int *directfb_minor_version;
38 const unsigned int *directfb_micro_version;
39 } SDL_DirectFB_Symbols;
40 #undef DFB_SYM
41
42 #define DFB_SYM(ret, name, args, al, func) ret name args { func SDL_DirectFB_Symbols.name al ; }
43 DFB_SYMS
44 #undef DFB_SYM
45
46 static void *handle = NULL;
47
48 int
SDL_DirectFB_LoadLibrary(void)49 SDL_DirectFB_LoadLibrary(void)
50 {
51 int retval = 0;
52
53 if (handle == NULL) {
54 handle = SDL_LoadObject(SDL_VIDEO_DRIVER_DIRECTFB_DYNAMIC);
55 if (handle != NULL) {
56 retval = 1;
57 #define DFB_SYM(ret, name, args, al, func) if (!(SDL_DirectFB_Symbols.name = SDL_LoadFunction(handle, # name))) retval = 0;
58 DFB_SYMS
59 #undef DFB_SYM
60 if (!
61 (SDL_DirectFB_Symbols.directfb_major_version =
62 SDL_LoadFunction(handle, "directfb_major_version")))
63 retval = 0;
64 if (!
65 (SDL_DirectFB_Symbols.directfb_minor_version =
66 SDL_LoadFunction(handle, "directfb_minor_version")))
67 retval = 0;
68 if (!
69 (SDL_DirectFB_Symbols.directfb_micro_version =
70 SDL_LoadFunction(handle, "directfb_micro_version")))
71 retval = 0;
72 }
73 }
74 if (retval) {
75 const char *stemp = DirectFBCheckVersion(DIRECTFB_MAJOR_VERSION,
76 DIRECTFB_MINOR_VERSION,
77 DIRECTFB_MICRO_VERSION);
78 /* Version Check */
79 if (stemp != NULL) {
80 fprintf(stderr,
81 "DirectFB Lib: Version mismatch. Compiled: %d.%d.%d Library %d.%d.%d\n",
82 DIRECTFB_MAJOR_VERSION, DIRECTFB_MINOR_VERSION,
83 DIRECTFB_MICRO_VERSION,
84 *SDL_DirectFB_Symbols.directfb_major_version,
85 *SDL_DirectFB_Symbols.directfb_minor_version,
86 *SDL_DirectFB_Symbols.directfb_micro_version);
87 retval = 0;
88 }
89 }
90 if (!retval)
91 SDL_DirectFB_UnLoadLibrary();
92 return retval;
93 }
94
95 void
SDL_DirectFB_UnLoadLibrary(void)96 SDL_DirectFB_UnLoadLibrary(void)
97 {
98 if (handle != NULL) {
99 SDL_UnloadObject(handle);
100 handle = NULL;
101 }
102 }
103
104 #else
105 int
SDL_DirectFB_LoadLibrary(void)106 SDL_DirectFB_LoadLibrary(void)
107 {
108 return 1;
109 }
110
111 void
SDL_DirectFB_UnLoadLibrary(void)112 SDL_DirectFB_UnLoadLibrary(void)
113 {
114 }
115 #endif
116
117 #endif /* SDL_VIDEO_DRIVER_DIRECTFB */
118