src/video/ataricommon/SDL_ikbdevents.c
author Sam Lantinga
Sun, 17 Feb 2002 19:54:28 +0000
changeset 281 c5010ab8ba35
child 297 f6ffac90895c
permissions -rw-r--r--
Added initial support for Atari (thanks Patrice!)
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/*
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    SDL - Simple DirectMedia Layer
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    Copyright (C) 1997, 1998, 1999, 2000, 2001  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 hardware IKBD
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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_ikbdinterrupt_s.h"
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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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/* To save state of keyboard */
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#define ATARIBIOS_MAXKEYS 128
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static unsigned char ikbd_previouskeyboard[ATARIBIOS_MAXKEYS];
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static Uint16 atari_prevmouseb;	/* buttons */
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/* The translation tables from a console scancode to a SDL keysym */
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#define KT_NOCHANGE -1
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enum {
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	KT_UNSHIFT=0,
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	KT_SHIFT=1,
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	KT_CAPS=2
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};
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static int caps_state;
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_KEYTAB *curtables;
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static unsigned char *tab_unshift, *tab_shift, *tab_caps;
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static SDLKey keymap[ATARIBIOS_MAXKEYS];
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static SDL_keysym *TranslateKey(int scancode, int numkeytable, SDL_keysym *keysym);
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void AtariIkbd_InitOSKeymap(_THIS)
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{
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	int i;
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	memset(SDL_AtariIkbd_keyboard, 0, ATARIBIOS_MAXKEYS);
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	memset(ikbd_previouskeyboard, 0, ATARIBIOS_MAXKEYS);
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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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	/* Read XBIOS tables for scancode -> ascii translation */
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	curtables=Keytbl(KT_NOCHANGE, KT_NOCHANGE, KT_NOCHANGE);
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	tab_unshift=curtables->unshift;
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	tab_shift=curtables->shift;
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	tab_caps=curtables->caps;
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	/* Set Caps lock initial state */
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	caps_state=(Kbshift(-1) & (1<<K_CAPSLOCK));
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	/* Now install our handler */
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	SDL_AtariIkbd_mouseb = SDL_AtariIkbd_mousex = SDL_AtariIkbd_mousey = 0;
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	atari_prevmouseb = 0;
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	Supexec(SDL_AtariIkbdInstall);
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}
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static int atari_GetButton(int button)
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{
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	switch(button)
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	{
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		case 0:
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			return SDL_BUTTON_RIGHT;
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			break;
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		case 1:
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		default:
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			return SDL_BUTTON_LEFT;
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			break;
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	}
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}
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void AtariIkbd_PumpEvents(_THIS)
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{
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	int i;
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	SDL_keysym keysym;
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	int specialkeys;
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	/*--- Send keyboard events ---*/
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	/* Update caps lock state */
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	if (SDL_AtariIkbd_keyboard[SCANCODE_CAPSLOCK] && !ikbd_previouskeyboard[SCANCODE_CAPSLOCK])
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		caps_state ^= 1;
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	/* Choose the translation table */
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	specialkeys=KT_UNSHIFT;
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	if (SDL_AtariIkbd_keyboard[SCANCODE_LEFTSHIFT] || SDL_AtariIkbd_keyboard[SCANCODE_RIGHTSHIFT])
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		specialkeys = KT_SHIFT;
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	if (caps_state)
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		specialkeys = KT_CAPS;
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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 (SDL_AtariIkbd_keyboard[i] && !ikbd_previouskeyboard[i])
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			SDL_PrivateKeyboard(SDL_PRESSED, TranslateKey(i, specialkeys, &keysym));
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		/* Key unpressed ? */
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		if (ikbd_previouskeyboard[i] && !SDL_AtariIkbd_keyboard[i])
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			SDL_PrivateKeyboard(SDL_RELEASED, TranslateKey(i, specialkeys, &keysym));
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	}
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	/* Will be previous table */
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	memcpy(ikbd_previouskeyboard, SDL_AtariIkbd_keyboard, ATARIBIOS_MAXKEYS);
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	/*--- Send mouse events ---*/
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	/* Mouse motion ? */
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	if (SDL_AtariIkbd_mousex || SDL_AtariIkbd_mousey) {
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		SDL_PrivateMouseMotion(0, 1, SDL_AtariIkbd_mousex, SDL_AtariIkbd_mousey);
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		SDL_AtariIkbd_mousex = SDL_AtariIkbd_mousey = 0;
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	}
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	/* Mouse button ? */
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	if (SDL_AtariIkbd_mouseb != atari_prevmouseb) {
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		for (i=0;i<2;i++) {
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			int curbutton, prevbutton;
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			curbutton = SDL_AtariIkbd_mouseb & (1<<i);
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			prevbutton = atari_prevmouseb & (1<<i);
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			if (curbutton & !prevbutton) {
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				SDL_PrivateMouseButton(SDL_PRESSED, atari_GetButton(i), 0, 0);
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			}
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			if (!curbutton & prevbutton) {
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				SDL_PrivateMouseButton(SDL_RELEASED, atari_GetButton(i), 0, 0);
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			}
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		}
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		atari_prevmouseb = SDL_AtariIkbd_mouseb;
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	}
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}
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static SDL_keysym *TranslateKey(int scancode, int numkeytable, SDL_keysym *keysym)
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{
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	unsigned char asciicode;
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	/* Set the keysym information */
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	keysym->scancode = scancode;
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	asciicode=0;
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	switch(numkeytable) {
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		case KT_UNSHIFT:
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			asciicode=tab_unshift[scancode];
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			break;
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		case KT_SHIFT:
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			asciicode=tab_shift[scancode];
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			break;
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		case KT_CAPS:
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			asciicode=tab_caps[scancode];
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			break;
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	}
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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 AtariIkbd_ShutdownEvents(void)
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{
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	Supexec(SDL_AtariIkbdUninstall);
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}
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