src/video/ataricommon/SDL_biosevents.c
author Sam Lantinga <slouken@libsdl.org>
Sun, 04 Jan 2004 16:49:27 +0000
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parent 305 9c6613983e85
child 1209 a55ac374271c
permissions -rw-r--r--
Updated copyright information for 2004 (Happy New Year!)
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/*
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    SDL - Simple DirectMedia Layer
769
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    Copyright (C) 1997-2004 Sam Lantinga
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    This library is free software; you can redistribute it and/or
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    modify it under the terms of the GNU Library General Public
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    License as published by the Free Software Foundation; either
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    version 2 of the License, or (at your option) any later version.
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    This library is distributed in the hope that it will be useful,
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    but WITHOUT ANY WARRANTY; without even the implied warranty of
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    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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    Library General Public License for more details.
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    You should have received a copy of the GNU Library General Public
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    License along with this library; if not, write to the Free
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    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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    Sam Lantinga
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    slouken@libsdl.org
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*/
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#ifdef SAVE_RCSID
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static char rcsid =
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 "@(#) $Id$";
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#endif
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/*
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 *	Atari keyboard events manager, using BIOS
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 *
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 *	Patrice Mandin
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 */
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#include <string.h>
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/* Mint includes */
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#include <mint/osbind.h>
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#include "SDL.h"
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#include "SDL_sysevents.h"
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#include "SDL_events_c.h"
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#include "SDL_atarikeys.h"
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#include "SDL_xbiosevents_c.h"
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/* To save state of keyboard */
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#define ATARIBIOS_MAXKEYS 128
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static unsigned char bios_currentkeyboard[ATARIBIOS_MAXKEYS];
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static unsigned char bios_previouskeyboard[ATARIBIOS_MAXKEYS];
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static unsigned char bios_currentascii[ATARIBIOS_MAXKEYS];
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/* Special keys state */
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enum {
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	K_RSHIFT=0,
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	K_LSHIFT,
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	K_CTRL,
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	K_ALT,
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	K_CAPSLOCK,
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	K_CLRHOME,
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	K_INSERT
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};
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/* The translation tables from a console scancode to a SDL keysym */
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static SDLKey keymap[ATARIBIOS_MAXKEYS];
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static SDL_keysym *TranslateKey(int scancode, int asciicode, SDL_keysym *keysym);
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static void UpdateSpecialKeys(int special_keys_state);
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void AtariBios_InitOSKeymap(_THIS)
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{
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	int i;
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	memset(bios_currentkeyboard, 0, sizeof(bios_currentkeyboard));
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	memset(bios_previouskeyboard, 0, sizeof(bios_previouskeyboard));
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	/* Initialize keymap */
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	for ( i=0; i<sizeof(keymap); i++ )
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		keymap[i] = SDLK_UNKNOWN;
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	/* Functions keys */
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	for ( i = 0; i<10; i++ )
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		keymap[SCANCODE_F1 + i] = SDLK_F1+i;
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	/* Cursor keypad */
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	keymap[SCANCODE_HELP] = SDLK_HELP;
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	keymap[SCANCODE_UNDO] = SDLK_UNDO;
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	keymap[SCANCODE_INSERT] = SDLK_INSERT;
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	keymap[SCANCODE_CLRHOME] = SDLK_HOME;
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	keymap[SCANCODE_UP] = SDLK_UP;
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	keymap[SCANCODE_DOWN] = SDLK_DOWN;
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	keymap[SCANCODE_RIGHT] = SDLK_RIGHT;
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	keymap[SCANCODE_LEFT] = SDLK_LEFT;
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	/* Special keys */
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	keymap[SCANCODE_ESCAPE] = SDLK_ESCAPE;
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	keymap[SCANCODE_BACKSPACE] = SDLK_BACKSPACE;
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	keymap[SCANCODE_TAB] = SDLK_TAB;
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	keymap[SCANCODE_ENTER] = SDLK_RETURN;
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	keymap[SCANCODE_DELETE] = SDLK_DELETE;
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	keymap[SCANCODE_LEFTCONTROL] = SDLK_LCTRL;
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	keymap[SCANCODE_LEFTSHIFT] = SDLK_LSHIFT;
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	keymap[SCANCODE_RIGHTSHIFT] = SDLK_RSHIFT;
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	keymap[SCANCODE_LEFTALT] = SDLK_LALT;
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	keymap[SCANCODE_CAPSLOCK] = SDLK_CAPSLOCK;
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	SDL_AtariXbios_InstallVectors(ATARI_XBIOS_MOUSEEVENTS|ATARI_XBIOS_JOYSTICKEVENTS);
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}
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void AtariBios_PumpEvents(_THIS)
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{
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	int i;
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	SDL_keysym keysym;
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	/* Update pressed keys */
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	memset(bios_currentkeyboard, 0, ATARIBIOS_MAXKEYS);
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	while (Bconstat(_CON)) {
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		unsigned long key_pressed;
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		unsigned char asciicode, scancode;
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		key_pressed=Bconin(_CON);
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		asciicode = key_pressed;
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		scancode = key_pressed >> 16;
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		bios_currentkeyboard[scancode]=0xFF;
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		bios_currentascii[scancode]=asciicode;
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	}
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	/* Read special keys */
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	UpdateSpecialKeys(Kbshift(-1));
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	/* Now generate events */
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	for (i=0; i<ATARIBIOS_MAXKEYS; i++) {
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		/* Key pressed ? */
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		if (bios_currentkeyboard[i] && !bios_previouskeyboard[i])
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			SDL_PrivateKeyboard(SDL_PRESSED, TranslateKey(i, bios_currentascii[i], &keysym));
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		/* Key unpressed ? */
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		if (bios_previouskeyboard[i] && !bios_currentkeyboard[i])
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			SDL_PrivateKeyboard(SDL_RELEASED, TranslateKey(i, bios_currentascii[i], &keysym));
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	}
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	SDL_AtariXbios_PostMouseEvents(this);
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	/* Will be previous table */
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	memcpy(bios_previouskeyboard, bios_currentkeyboard, ATARIBIOS_MAXKEYS);
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}
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static void UpdateSpecialKeys(int special_keys_state)
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{
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#define UPDATE_SPECIAL_KEYS(numbit,scancode) \
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	{	\
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		if (special_keys_state & (1<<(numbit))) { \
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			bios_currentkeyboard[scancode]=0xFF; \
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			bios_currentascii[scancode]=0; \
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		}	\
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	}
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	UPDATE_SPECIAL_KEYS(K_RSHIFT, SCANCODE_RIGHTSHIFT);
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	UPDATE_SPECIAL_KEYS(K_LSHIFT, SCANCODE_LEFTSHIFT);
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	UPDATE_SPECIAL_KEYS(K_CTRL, SCANCODE_LEFTCONTROL);
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	UPDATE_SPECIAL_KEYS(K_ALT, SCANCODE_LEFTALT);
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	UPDATE_SPECIAL_KEYS(K_CAPSLOCK, SCANCODE_CAPSLOCK);
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}
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static SDL_keysym *TranslateKey(int scancode, int asciicode, SDL_keysym *keysym)
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{
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	/* Set the keysym information */
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	keysym->scancode = scancode;
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	if (asciicode)
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		keysym->sym = asciicode;		
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	else
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		keysym->sym = keymap[scancode];
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	keysym->mod = KMOD_NONE;
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	keysym->unicode = 0;
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	return(keysym);
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}
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void AtariBios_ShutdownEvents(void)
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{
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	SDL_AtariXbios_RestoreVectors();
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}