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/* $Id$ */
/*
* This file is part of OpenTTD.
* 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.
* 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.
* 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/>.
*/
/** @file sdl.cpp Implementation of SDL support. */
#include "stdafx.h"
#ifdef WITH_SDL
#include "sdl.h"
#include <SDL.h>
/** Number of users of the SDL library. */
static int _sdl_usage;
#ifdef DYNAMICALLY_LOADED_SDL
#include "os/windows/win32.h"
#define M(x) x "\0"
static const char sdl_files[] =
M("sdl.dll")
M("SDL_Init")
M("SDL_InitSubSystem")
M("SDL_GetError")
M("SDL_QuitSubSystem")
M("SDL_UpdateRect")
M("SDL_UpdateRects")
M("SDL_SetColors")
M("SDL_WM_SetCaption")
M("SDL_ShowCursor")
M("SDL_FreeSurface")
M("SDL_PollEvent")
M("SDL_WarpMouse")
M("SDL_GetTicks")
M("SDL_OpenAudio")
M("SDL_PauseAudio")
M("SDL_CloseAudio")
M("SDL_LockSurface")
M("SDL_UnlockSurface")
M("SDL_GetModState")
M("SDL_Delay")
M("SDL_Quit")
M("SDL_SetVideoMode")
M("SDL_EnableKeyRepeat")
M("SDL_EnableUNICODE")
M("SDL_VideoDriverName")
M("SDL_ListModes")
M("SDL_GetKeyState")
M("SDL_LoadBMP_RW")
M("SDL_RWFromFile")
M("SDL_SetColorKey")
M("SDL_WM_SetIcon")
M("SDL_MapRGB")
M("SDL_VideoModeOK")
M("SDL_Linked_Version")
M("")
;
#undef M
SDLProcs sdl_proc;
static const char *LoadSdlDLL()
{
if (sdl_proc.SDL_Init != NULL) {
return NULL;
}
if (!LoadLibraryList((Function *)(void *)&sdl_proc, sdl_files)) {
return "Unable to load sdl.dll";
}
return NULL;
}
#endif /* DYNAMICALLY_LOADED_SDL */
/**
* Open the SDL library.
* @param x The subsystem to load.
*/
const char *SdlOpen(uint32 x)
{
#ifdef DYNAMICALLY_LOADED_SDL
{
const char *s = LoadSdlDLL();
if (s != NULL) return s;
}
#endif
if (_sdl_usage++ == 0) {
if (SDL_CALL SDL_Init(x | SDL_INIT_NOPARACHUTE) == -1) return SDL_CALL SDL_GetError();
} else if (x != 0) {
if (SDL_CALL SDL_InitSubSystem(x) == -1) return SDL_CALL SDL_GetError();
}
return NULL;
}
/**
* Close the SDL library.
* @param x The subsystem to close.
*/
void SdlClose(uint32 x)
{
if (x != 0) {
SDL_CALL SDL_QuitSubSystem(x);
}
if (--_sdl_usage == 0) {
SDL_CALL SDL_Quit();
}
}
#endif
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