# sdl.cpp

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    00001 /* $Id: sdl.cpp 22406 2011-05-01 19:51:52Z rubidium $ */
    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