i_system.h

/* Emacs style mode select   -*- C++ -*-
 *-----------------------------------------------------------------------------
 *
 *
 *  PrBoom: a Doom port merged with LxDoom and LSDLDoom
 *  based on BOOM, a modified and improved DOOM engine
 *  Copyright (C) 1999 by
 *  id Software, Chi Hoang, Lee Killough, Jim Flynn, Rand Phares, Ty Halderman
 *  Copyright (C) 1999-2000 by
 *  Jess Haas, Nicolas Kalkhof, Colin Phipps, Florian Schulze
 *  Copyright 2005, 2006 by
 *  Florian Schulze, Colin Phipps, Neil Stevens, Andrey Budko
 *  Copyright 2023, 2024 by
 *  Frenkel Smeijers
 *
 *  This program 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; either version 2
 *  of the License, or (at your option) any later version.
 *
 *  This program 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 this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 *  02111-1307, USA.
 *
 * DESCRIPTION:
 *      System specific interface stuff.
 *
 *-----------------------------------------------------------------------------*/

#ifndef __I_SYSTEM__
#define __I_SYSTEM__

#include "config.h"

void I_InitTimer(void);
int32_t I_GetTime(void);

void _Noreturn I_Quit(void);
void _Noreturn I_Error(const char *error, ...);

void I_InitKeyboard(void);

void I_InitGraphics(void);


void I_SetScreenMode(uint16_t mode);
#pragma aux I_SetScreenMode = \
	"push si",	\
	"push di",	\
	"push bp",	\
	"push es",	\
	"cli",		\
	"int 0x10",	\
	"sti",		\
	"pop es",	\
	"pop bp",	\
	"pop di",	\
	"pop si"	\
	parm [ax]


void I_FinishUpdate(void);

void I_ReloadPalette(void);
void I_SetPalette(int8_t pal);

/* I_StartTic
 * Called by D_DoomLoop,
 * called before processing each tic in a frame.
 * Quick syncronous operations are performed here.
 * Can call D_PostEvent.
 */
void I_StartTic(void);

#endif