# 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
    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