/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997, 1998, 1999, 2000, 2001 Sam Lantinga
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Sam Lantinga
slouken@devolution.com
*/
#ifdef SAVE_RCSID
static char rcsid =
"@(#) $Id: SDL.c,v 1.3 2001/05/23 23:35:09 hercules Exp $";
#endif
/* Initialization code for SDL */
#include <stdlib.h> /* For getenv() */
#include "SDL.h"
#include "SDL_endian.h"
#include "SDL_fatal.h"
#ifndef DISABLE_VIDEO
#include "SDL_leaks.h"
#endif
/* Initialization/Cleanup routines */
#ifndef DISABLE_JOYSTICK
extern int SDL_JoystickInit(void);
extern void SDL_JoystickQuit(void);
#endif
#ifndef DISABLE_CDROM
extern int SDL_CDROMInit(void);
extern void SDL_CDROMQuit(void);
#endif
#ifndef DISABLE_TIMERS
extern void SDL_StartTicks(void);
extern int SDL_TimerInit(void);
extern void SDL_TimerQuit(void);
#endif
/* The current SDL version */
static SDL_version version =
{ SDL_MAJOR_VERSION, SDL_MINOR_VERSION, SDL_PATCHLEVEL };
/* The initialized subsystems */
static Uint32 SDL_initialized = 0;
static Uint32 ticks_started = 0;
#ifdef CHECK_LEAKS
int surfaces_allocated = 0;
#endif
int SDL_InitSubSystem(Uint32 flags)
{
#ifndef DISABLE_VIDEO
/* Initialize the video/event subsystem */
if ( (flags & SDL_INIT_VIDEO) && !(SDL_initialized & SDL_INIT_VIDEO) ) {
if ( SDL_VideoInit
(getenv("SDL_VIDEODRIVER"), (flags&SDL_INIT_EVENTTHREAD)) < 0 ) {
return(-1);
}
SDL_initialized |= SDL_INIT_VIDEO;
}
#else
if ( flags & SDL_INIT_VIDEO ) {
SDL_SetError("SDL not built with video support");
return(-1);
}
#endif
#ifndef DISABLE_AUDIO
/* Initialize the audio subsystem */
if ( (flags & SDL_INIT_AUDIO) && !(SDL_initialized & SDL_INIT_AUDIO) ) {
if ( SDL_AudioInit
(getenv("SDL_AUDIODRIVER")) < 0 ) { return(-1);
}
SDL_initialized |= SDL_INIT_AUDIO;
}
#else
if ( flags & SDL_INIT_AUDIO ) {
SDL_SetError("SDL not built with audio support");
return(-1);
}
#endif
#ifndef DISABLE_TIMERS
/* Initialize the timer subsystem */
if ( ! ticks_started ) {
SDL_StartTicks();
ticks_started = 1;
}
if ( (flags & SDL_INIT_TIMER) && !(SDL_initialized & SDL_INIT_TIMER) ) {
if ( SDL_TimerInit() < 0 ) {
return(-1);
}
SDL_initialized |= SDL_INIT_TIMER;
}
#else
if ( flags & SDL_INIT_TIMER ) {
SDL_SetError("SDL not built with timer support");
return(-1);
}
#endif
#ifndef DISABLE_JOYSTICK
/* Initialize the joystick subsystem */
if ( (flags & SDL_INIT_JOYSTICK) &&
!(SDL_initialized & SDL_INIT_JOYSTICK) ) {
if ( SDL_JoystickInit() < 0 ) {
return(-1);
}
SDL_initialized |= SDL_INIT_JOYSTICK;
}
#else
if ( flags & SDL_INIT_JOYSTICK ) {
SDL_SetError("SDL not built with joystick support");
return(-1);
}
#endif
#ifndef DISABLE_CDROM
/* Initialize the CD-ROM subsystem */
if ( (flags & SDL_INIT_CDROM) && !(SDL_initialized & SDL_INIT_CDROM) ) {
if ( SDL_CDROMInit() < 0 ) {
return(-1);
}
SDL_initialized |= SDL_INIT_CDROM;
}
#else
if ( flags & SDL_INIT_CDROM ) {
SDL_SetError("SDL not built with cdrom support");
return(-1);
}
#endif
return(0);
}
int SDL_Init(Uint32 flags)
{
/* Clear the error message */
SDL_ClearError();
/* Initialize the desired subsystems */
if ( SDL_InitSubSystem(flags) < 0 ) {
return(-1);
}
/* Everything is initialized */
if ( !(flags & SDL_INIT_NOPARACHUTE) ) {
SDL_InstallParachute();
}
return(0);
}
void SDL_QuitSubSystem(Uint32 flags)
{
/* Shut down requested initialized subsystems */
#ifndef DISABLE_CDROM
if ( (flags & SDL_initialized & SDL_INIT_CDROM) ) {
SDL_CDROMQuit();
SDL_initialized &= ~SDL_INIT_CDROM;
}
#endif
#ifndef DISABLE_JOYSTICK
if ( (flags & SDL_initialized & SDL_INIT_JOYSTICK) ) {
SDL_JoystickQuit();
SDL_initialized &= ~SDL_INIT_JOYSTICK;
}
#endif
#ifndef DISABLE_TIMERS
if ( (flags & SDL_initialized & SDL_INIT_TIMER) ) {
SDL_TimerQuit();
SDL_initialized &= ~SDL_INIT_TIMER;
}
#endif
#ifndef DISABLE_AUDIO
if ( (flags & SDL_initialized & SDL_INIT_AUDIO) ) {
SDL_AudioQuit();
SDL_initialized &= ~SDL_INIT_AUDIO;
}
#endif
#ifndef DISABLE_VIDEO
if ( (flags & SDL_initialized & SDL_INIT_VIDEO) ) {
SDL_VideoQuit();
SDL_initialized &= ~SDL_INIT_VIDEO;
}
#endif
}
Uint32 SDL_WasInit(Uint32 flags)
{
if ( ! flags ) {
flags = SDL_INIT_EVERYTHING;
}
return (SDL_initialized&flags);
}
void SDL_Quit(void)
{
/* Quit all subsystems */
SDL_QuitSubSystem(SDL_INIT_EVERYTHING);
#ifdef CHECK_LEAKS
/* Print the number of surfaces not freed */
if ( surfaces_allocated != 0 ) {
SDL_printf("SDL Warning: %d SDL surfaces extant\n",
surfaces_allocated);
}
#endif
/* Uninstall any parachute signal handlers */
SDL_UninstallParachute();
}
/* Return the library version number */
const SDL_version * SDL_Linked_Version(void)
{
return(&version);
}