sdl.cpp

Go to the documentation of this file.
00001 /* $Id: sdl.cpp 18478 2009-12-13 00:33:00Z rubidium $ */
00002 
00005 #include "stdafx.h"
00006 
00007 #ifdef WITH_SDL
00008 
00009 #include "openttd.h"
00010 #include "sdl.h"
00011 #include <SDL.h>
00012 
00013 #ifdef UNIX
00014 #include <signal.h>
00015 
00016 #ifdef __MORPHOS__
00017   /* The system supplied definition of SIG_DFL is wrong on MorphOS */
00018   #undef SIG_DFL
00019   #define SIG_DFL (void (*)(int))0
00020 #endif
00021 #endif
00022 
00023 static int _sdl_usage;
00024 
00025 #ifdef DYNAMICALLY_LOADED_SDL
00026 
00027 #include "win32.h"
00028 
00029 #define M(x) x "\0"
00030 static const char sdl_files[] =
00031   M("sdl.dll")
00032   M("SDL_Init")
00033   M("SDL_InitSubSystem")
00034   M("SDL_GetError")
00035   M("SDL_QuitSubSystem")
00036   M("SDL_UpdateRect")
00037   M("SDL_UpdateRects")
00038   M("SDL_SetColors")
00039   M("SDL_WM_SetCaption")
00040   M("SDL_ShowCursor")
00041   M("SDL_FreeSurface")
00042   M("SDL_PollEvent")
00043   M("SDL_WarpMouse")
00044   M("SDL_GetTicks")
00045   M("SDL_OpenAudio")
00046   M("SDL_PauseAudio")
00047   M("SDL_CloseAudio")
00048   M("SDL_LockSurface")
00049   M("SDL_UnlockSurface")
00050   M("SDL_GetModState")
00051   M("SDL_Delay")
00052   M("SDL_Quit")
00053   M("SDL_SetVideoMode")
00054   M("SDL_EnableKeyRepeat")
00055   M("SDL_EnableUNICODE")
00056   M("SDL_VideoDriverName")
00057   M("SDL_ListModes")
00058   M("SDL_GetKeyState")
00059   M("SDL_LoadBMP_RW")
00060   M("SDL_RWFromFile")
00061   M("SDL_SetColorKey")
00062   M("SDL_WM_SetIcon")
00063   M("SDL_MapRGB")
00064   M("SDL_VideoModeOK")
00065   M("")
00066 ;
00067 #undef M
00068 
00069 SDLProcs sdl_proc;
00070 
00071 static const char *LoadSdlDLL()
00072 {
00073   if (sdl_proc.SDL_Init != NULL)
00074     return NULL;
00075   if (!LoadLibraryList((Function *)(void *)&sdl_proc, sdl_files))
00076     return "Unable to load sdl.dll";
00077   return NULL;
00078 }
00079 
00080 #endif /* DYNAMICALLY_LOADED_SDL */
00081 
00082 
00083 #ifdef UNIX
00084 static void SdlAbort(int sig)
00085 {
00086   /* Own hand-made parachute for the cases of failed assertions. */
00087   SDL_CALL SDL_Quit();
00088 
00089   switch (sig) {
00090     case SIGSEGV:
00091     case SIGFPE:
00092       signal(sig, SIG_DFL);
00093       raise(sig);
00094       break;
00095 
00096     default:
00097       break;
00098   }
00099 }
00100 #endif
00101 
00102 
00103 const char *SdlOpen(uint32 x)
00104 {
00105 #ifdef DYNAMICALLY_LOADED_SDL
00106   {
00107     const char *s = LoadSdlDLL();
00108     if (s != NULL) return s;
00109   }
00110 #endif
00111   if (_sdl_usage++ == 0) {
00112     if (SDL_CALL SDL_Init(x) == -1)
00113       return SDL_CALL SDL_GetError();
00114   } else if (x != 0) {
00115     if (SDL_CALL SDL_InitSubSystem(x) == -1)
00116       return SDL_CALL SDL_GetError();
00117   }
00118 
00119 #ifdef UNIX
00120   signal(SIGABRT, SdlAbort);
00121   signal(SIGSEGV, SdlAbort);
00122   signal(SIGFPE, SdlAbort);
00123 #endif
00124 
00125   return NULL;
00126 }
00127 
00128 void SdlClose(uint32 x)
00129 {
00130   if (x != 0)
00131     SDL_CALL SDL_QuitSubSystem(x);
00132   if (--_sdl_usage == 0) {
00133     SDL_CALL SDL_Quit();
00134     #ifdef UNIX
00135     signal(SIGABRT, SIG_DFL);
00136     signal(SIGSEGV, SIG_DFL);
00137     signal(SIGFPE, SIG_DFL);
00138     #endif
00139   }
00140 }
00141 
00142 #endif

Generated on Wed Dec 23 20:12:51 2009 for OpenTTD by  doxygen 1.5.6