sdl.cpp

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00001 /* $Id: sdl.cpp 18439 2009-12-09 02:49:01Z glx $ */
00002 
00003 /*
00004  * This file is part of OpenTTD.
00005  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
00006  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
00007  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
00008  */
00009 
00012 #include "stdafx.h"
00013 
00014 #ifdef WITH_SDL
00015 
00016 #include "sdl.h"
00017 #include <SDL.h>
00018 
00019 static int _sdl_usage;
00020 
00021 #ifdef DYNAMICALLY_LOADED_SDL
00022 
00023 #include "os/windows/win32.h"
00024 
00025 #define M(x) x "\0"
00026 static const char sdl_files[] =
00027   M("sdl.dll")
00028   M("SDL_Init")
00029   M("SDL_InitSubSystem")
00030   M("SDL_GetError")
00031   M("SDL_QuitSubSystem")
00032   M("SDL_UpdateRect")
00033   M("SDL_UpdateRects")
00034   M("SDL_SetColors")
00035   M("SDL_WM_SetCaption")
00036   M("SDL_ShowCursor")
00037   M("SDL_FreeSurface")
00038   M("SDL_PollEvent")
00039   M("SDL_WarpMouse")
00040   M("SDL_GetTicks")
00041   M("SDL_OpenAudio")
00042   M("SDL_PauseAudio")
00043   M("SDL_CloseAudio")
00044   M("SDL_LockSurface")
00045   M("SDL_UnlockSurface")
00046   M("SDL_GetModState")
00047   M("SDL_Delay")
00048   M("SDL_Quit")
00049   M("SDL_SetVideoMode")
00050   M("SDL_EnableKeyRepeat")
00051   M("SDL_EnableUNICODE")
00052   M("SDL_VideoDriverName")
00053   M("SDL_ListModes")
00054   M("SDL_GetKeyState")
00055   M("SDL_LoadBMP_RW")
00056   M("SDL_RWFromFile")
00057   M("SDL_SetColorKey")
00058   M("SDL_WM_SetIcon")
00059   M("SDL_MapRGB")
00060   M("SDL_VideoModeOK")
00061   M("SDL_Linked_Version")
00062   M("")
00063 ;
00064 #undef M
00065 
00066 SDLProcs sdl_proc;
00067 
00068 static const char *LoadSdlDLL()
00069 {
00070   if (sdl_proc.SDL_Init != NULL)
00071     return NULL;
00072   if (!LoadLibraryList((Function *)(void *)&sdl_proc, sdl_files))
00073     return "Unable to load sdl.dll";
00074   return NULL;
00075 }
00076 
00077 #endif /* DYNAMICALLY_LOADED_SDL */
00078 
00079 
00080 const char *SdlOpen(uint32 x)
00081 {
00082 #ifdef DYNAMICALLY_LOADED_SDL
00083   {
00084     const char *s = LoadSdlDLL();
00085     if (s != NULL) return s;
00086   }
00087 #endif
00088   if (_sdl_usage++ == 0) {
00089     if (SDL_CALL SDL_Init(x | SDL_INIT_NOPARACHUTE) == -1)
00090       return SDL_CALL SDL_GetError();
00091   } else if (x != 0) {
00092     if (SDL_CALL SDL_InitSubSystem(x) == -1)
00093       return SDL_CALL SDL_GetError();
00094   }
00095 
00096   return NULL;
00097 }
00098 
00099 void SdlClose(uint32 x)
00100 {
00101   if (x != 0)
00102     SDL_CALL SDL_QuitSubSystem(x);
00103   if (--_sdl_usage == 0) {
00104     SDL_CALL SDL_Quit();
00105   }
00106 }
00107 
00108 #endif

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