sdl.cpp

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00001 /* $Id: sdl.cpp 15718 2009-03-15 00:32:18Z 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("")
00065 ;
00066 #undef M
00067 
00068 SDLProcs sdl_proc;
00069 
00070 static const char *LoadSdlDLL()
00071 {
00072   if (sdl_proc.SDL_Init != NULL)
00073     return NULL;
00074   if (!LoadLibraryList((Function *)(void *)&sdl_proc, sdl_files))
00075     return "Unable to load sdl.dll";
00076   return NULL;
00077 }
00078 
00079 #endif /* DYNAMICALLY_LOADED_SDL */
00080 
00081 
00082 #ifdef UNIX
00083 static void SdlAbort(int sig)
00084 {
00085   /* Own hand-made parachute for the cases of failed assertions. */
00086   SDL_CALL SDL_Quit();
00087 
00088   switch (sig) {
00089     case SIGSEGV:
00090     case SIGFPE:
00091       signal(sig, SIG_DFL);
00092       raise(sig);
00093       break;
00094 
00095     default:
00096       break;
00097   }
00098 }
00099 #endif
00100 
00101 
00102 const char *SdlOpen(uint32 x)
00103 {
00104 #ifdef DYNAMICALLY_LOADED_SDL
00105   {
00106     const char *s = LoadSdlDLL();
00107     if (s != NULL) return s;
00108   }
00109 #endif
00110   if (_sdl_usage++ == 0) {
00111     if (SDL_CALL SDL_Init(x) == -1)
00112       return SDL_CALL SDL_GetError();
00113   } else if (x != 0) {
00114     if (SDL_CALL SDL_InitSubSystem(x) == -1)
00115       return SDL_CALL SDL_GetError();
00116   }
00117 
00118 #ifdef UNIX
00119   signal(SIGABRT, SdlAbort);
00120   signal(SIGSEGV, SdlAbort);
00121   signal(SIGFPE, SdlAbort);
00122 #endif
00123 
00124   return NULL;
00125 }
00126 
00127 void SdlClose(uint32 x)
00128 {
00129   if (x != 0)
00130     SDL_CALL SDL_QuitSubSystem(x);
00131   if (--_sdl_usage == 0) {
00132     SDL_CALL SDL_Quit();
00133     #ifdef UNIX
00134     signal(SIGABRT, SIG_DFL);
00135     signal(SIGSEGV, SIG_DFL);
00136     signal(SIGFPE, SIG_DFL);
00137     #endif
00138   }
00139 }
00140 
00141 #endif

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