sdl.cpp

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00001 /* $Id$ */
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 
00020 static int _sdl_usage;
00021 
00022 #ifdef DYNAMICALLY_LOADED_SDL
00023 
00024 #include "os/windows/win32.h"
00025 
00026 #define M(x) x "\0"
00027 static const char sdl_files[] =
00028   M("sdl.dll")
00029   M("SDL_Init")
00030   M("SDL_InitSubSystem")
00031   M("SDL_GetError")
00032   M("SDL_QuitSubSystem")
00033   M("SDL_UpdateRect")
00034   M("SDL_UpdateRects")
00035   M("SDL_SetColors")
00036   M("SDL_WM_SetCaption")
00037   M("SDL_ShowCursor")
00038   M("SDL_FreeSurface")
00039   M("SDL_PollEvent")
00040   M("SDL_WarpMouse")
00041   M("SDL_GetTicks")
00042   M("SDL_OpenAudio")
00043   M("SDL_PauseAudio")
00044   M("SDL_CloseAudio")
00045   M("SDL_LockSurface")
00046   M("SDL_UnlockSurface")
00047   M("SDL_GetModState")
00048   M("SDL_Delay")
00049   M("SDL_Quit")
00050   M("SDL_SetVideoMode")
00051   M("SDL_EnableKeyRepeat")
00052   M("SDL_EnableUNICODE")
00053   M("SDL_VideoDriverName")
00054   M("SDL_ListModes")
00055   M("SDL_GetKeyState")
00056   M("SDL_LoadBMP_RW")
00057   M("SDL_RWFromFile")
00058   M("SDL_SetColorKey")
00059   M("SDL_WM_SetIcon")
00060   M("SDL_MapRGB")
00061   M("SDL_VideoModeOK")
00062   M("SDL_Linked_Version")
00063   M("")
00064 ;
00065 #undef M
00066 
00067 SDLProcs sdl_proc;
00068 
00069 static const char *LoadSdlDLL()
00070 {
00071   if (sdl_proc.SDL_Init != NULL) {
00072     return NULL;
00073   }
00074   if (!LoadLibraryList((Function *)(void *)&sdl_proc, sdl_files)) {
00075     return "Unable to load sdl.dll";
00076   }
00077   return NULL;
00078 }
00079 
00080 #endif /* DYNAMICALLY_LOADED_SDL */
00081 
00086 const char *SdlOpen(uint32 x)
00087 {
00088 #ifdef DYNAMICALLY_LOADED_SDL
00089   {
00090     const char *s = LoadSdlDLL();
00091     if (s != NULL) return s;
00092   }
00093 #endif
00094   if (_sdl_usage++ == 0) {
00095     if (SDL_CALL SDL_Init(x | SDL_INIT_NOPARACHUTE) == -1) return SDL_CALL SDL_GetError();
00096   } else if (x != 0) {
00097     if (SDL_CALL SDL_InitSubSystem(x) == -1) return SDL_CALL SDL_GetError();
00098   }
00099 
00100   return NULL;
00101 }
00102 
00107 void SdlClose(uint32 x)
00108 {
00109   if (x != 0) {
00110     SDL_CALL SDL_QuitSubSystem(x);
00111   }
00112   if (--_sdl_usage == 0) {
00113     SDL_CALL SDL_Quit();
00114   }
00115 }
00116 
00117 #endif

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