SDL  2.0
SDL_DirectFB_dyn.c
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1 /*
2  Simple DirectMedia Layer
3  Copyright (C) 1997-2018 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 ; }
44 #undef DFB_SYM
45 
46 static void *handle = NULL;
47 
48 int
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)
92  return retval;
93 }
94 
95 void
97 {
98  if (handle != NULL) {
100  handle = NULL;
101  }
102 }
103 
104 #else
105 int
107 {
108  return 1;
109 }
110 
111 void
113 {
114 }
115 #endif
116 
117 #endif /* SDL_VIDEO_DRIVER_DIRECTFB */
void SDL_DirectFB_UnLoadLibrary(void)
#define SDL_LoadObject
#define SDL_UnloadObject
#define DFB_SYMS
SDL_bool retval
EGLImageKHR EGLint EGLint * handle
Definition: eglext.h:937
#define NULL
Definition: begin_code.h:164
void * SDL_LoadFunction(void *handle, const char *name)
int SDL_DirectFB_LoadLibrary(void)