/project/jni/sdl-1.3/src/video/directfb/SDL_DirectFB_dyn.c

  1/*
  2  Simple DirectMedia Layer
  3  Copyright (C) 1997-2012 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_config.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;
 33static 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  ; }
 43DFB_SYMS
 44#undef DFB_SYM
 45
 46static void *handle = NULL;
 47
 48int
 49SDL_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
 95void
 96SDL_DirectFB_UnLoadLibrary(void)
 97{
 98    if (handle != NULL) {
 99        SDL_UnloadObject(handle);
100        handle = NULL;
101    }
102}
103
104#else
105int
106SDL_DirectFB_LoadLibrary(void)
107{
108    return 1;
109}
110
111void
112SDL_DirectFB_UnLoadLibrary(void)
113{
114}
115#endif
116
117#endif /* SDL_VIDEO_DRIVER_DIRECTFB */