src/video/ataricommon/SDL_biosevents.c
author Sam Lantinga <slouken@libsdl.org>
Sun, 10 Mar 2002 03:33:59 +0000
changeset 305 9c6613983e85
parent 297 f6ffac90895c
child 769 b8d311d90021
permissions -rw-r--r--
Atari port cleanups from Patrice
     1 /*
     2     SDL - Simple DirectMedia Layer
     3     Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002  Sam Lantinga
     4 
     5     This library is free software; you can redistribute it and/or
     6     modify it under the terms of the GNU Library General Public
     7     License as published by the Free Software Foundation; either
     8     version 2 of the License, or (at your option) any later version.
     9 
    10     This library is distributed in the hope that it will be useful,
    11     but WITHOUT ANY WARRANTY; without even the implied warranty of
    12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    13     Library General Public License for more details.
    14 
    15     You should have received a copy of the GNU Library General Public
    16     License along with this library; if not, write to the Free
    17     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
    18 
    19     Sam Lantinga
    20     slouken@libsdl.org
    21 */
    22 
    23 #ifdef SAVE_RCSID
    24 static char rcsid =
    25  "@(#) $Id$";
    26 #endif
    27 
    28 /*
    29  *	Atari keyboard events manager, using BIOS
    30  *
    31  *	Patrice Mandin
    32  */
    33 
    34 #include <string.h>
    35 
    36 /* Mint includes */
    37 #include <mint/osbind.h>
    38 
    39 #include "SDL.h"
    40 #include "SDL_sysevents.h"
    41 #include "SDL_events_c.h"
    42 
    43 #include "SDL_atarikeys.h"
    44 #include "SDL_xbiosevents_c.h"
    45 
    46 /* To save state of keyboard */
    47 #define ATARIBIOS_MAXKEYS 128
    48 
    49 static unsigned char bios_currentkeyboard[ATARIBIOS_MAXKEYS];
    50 static unsigned char bios_previouskeyboard[ATARIBIOS_MAXKEYS];
    51 static unsigned char bios_currentascii[ATARIBIOS_MAXKEYS];
    52 
    53 /* Special keys state */
    54 enum {
    55 	K_RSHIFT=0,
    56 	K_LSHIFT,
    57 	K_CTRL,
    58 	K_ALT,
    59 	K_CAPSLOCK,
    60 	K_CLRHOME,
    61 	K_INSERT
    62 };
    63 
    64 /* The translation tables from a console scancode to a SDL keysym */
    65 static SDLKey keymap[ATARIBIOS_MAXKEYS];
    66 
    67 static SDL_keysym *TranslateKey(int scancode, int asciicode, SDL_keysym *keysym);
    68 static void UpdateSpecialKeys(int special_keys_state);
    69 
    70 void AtariBios_InitOSKeymap(_THIS)
    71 {
    72 	int i;
    73 
    74 	memset(bios_currentkeyboard, 0, sizeof(bios_currentkeyboard));
    75 	memset(bios_previouskeyboard, 0, sizeof(bios_previouskeyboard));
    76 
    77 	/* Initialize keymap */
    78 	for ( i=0; i<sizeof(keymap); i++ )
    79 		keymap[i] = SDLK_UNKNOWN;
    80 
    81 	/* Functions keys */
    82 	for ( i = 0; i<10; i++ )
    83 		keymap[SCANCODE_F1 + i] = SDLK_F1+i;
    84 
    85 	/* Cursor keypad */
    86 	keymap[SCANCODE_HELP] = SDLK_HELP;
    87 	keymap[SCANCODE_UNDO] = SDLK_UNDO;
    88 	keymap[SCANCODE_INSERT] = SDLK_INSERT;
    89 	keymap[SCANCODE_CLRHOME] = SDLK_HOME;
    90 	keymap[SCANCODE_UP] = SDLK_UP;
    91 	keymap[SCANCODE_DOWN] = SDLK_DOWN;
    92 	keymap[SCANCODE_RIGHT] = SDLK_RIGHT;
    93 	keymap[SCANCODE_LEFT] = SDLK_LEFT;
    94 
    95 	/* Special keys */
    96 	keymap[SCANCODE_ESCAPE] = SDLK_ESCAPE;
    97 	keymap[SCANCODE_BACKSPACE] = SDLK_BACKSPACE;
    98 	keymap[SCANCODE_TAB] = SDLK_TAB;
    99 	keymap[SCANCODE_ENTER] = SDLK_RETURN;
   100 	keymap[SCANCODE_DELETE] = SDLK_DELETE;
   101 	keymap[SCANCODE_LEFTCONTROL] = SDLK_LCTRL;
   102 	keymap[SCANCODE_LEFTSHIFT] = SDLK_LSHIFT;
   103 	keymap[SCANCODE_RIGHTSHIFT] = SDLK_RSHIFT;
   104 	keymap[SCANCODE_LEFTALT] = SDLK_LALT;
   105 	keymap[SCANCODE_CAPSLOCK] = SDLK_CAPSLOCK;
   106 
   107 	SDL_AtariXbios_InstallVectors(ATARI_XBIOS_MOUSEEVENTS|ATARI_XBIOS_JOYSTICKEVENTS);
   108 }
   109 
   110 void AtariBios_PumpEvents(_THIS)
   111 {
   112 	int i;
   113 	SDL_keysym keysym;
   114 
   115 	/* Update pressed keys */
   116 	memset(bios_currentkeyboard, 0, ATARIBIOS_MAXKEYS);
   117 
   118 	while (Bconstat(_CON)) {
   119 		unsigned long key_pressed;
   120 		unsigned char asciicode, scancode;
   121 
   122 		key_pressed=Bconin(_CON);
   123 
   124 		asciicode = key_pressed;
   125 		scancode = key_pressed >> 16;
   126 
   127 		bios_currentkeyboard[scancode]=0xFF;
   128 		bios_currentascii[scancode]=asciicode;
   129 	}
   130 
   131 	/* Read special keys */
   132 	UpdateSpecialKeys(Kbshift(-1));
   133 
   134 	/* Now generate events */
   135 	for (i=0; i<ATARIBIOS_MAXKEYS; i++) {
   136 		/* Key pressed ? */
   137 		if (bios_currentkeyboard[i] && !bios_previouskeyboard[i])
   138 			SDL_PrivateKeyboard(SDL_PRESSED, TranslateKey(i, bios_currentascii[i], &keysym));
   139 			
   140 		/* Key unpressed ? */
   141 		if (bios_previouskeyboard[i] && !bios_currentkeyboard[i])
   142 			SDL_PrivateKeyboard(SDL_RELEASED, TranslateKey(i, bios_currentascii[i], &keysym));
   143 	}
   144 
   145 	SDL_AtariXbios_PostMouseEvents(this);
   146 
   147 	/* Will be previous table */
   148 	memcpy(bios_previouskeyboard, bios_currentkeyboard, ATARIBIOS_MAXKEYS);
   149 }
   150 
   151 static void UpdateSpecialKeys(int special_keys_state)
   152 {
   153 #define UPDATE_SPECIAL_KEYS(numbit,scancode) \
   154 	{	\
   155 		if (special_keys_state & (1<<(numbit))) { \
   156 			bios_currentkeyboard[scancode]=0xFF; \
   157 			bios_currentascii[scancode]=0; \
   158 		}	\
   159 	}
   160 
   161 	UPDATE_SPECIAL_KEYS(K_RSHIFT, SCANCODE_RIGHTSHIFT);
   162 	UPDATE_SPECIAL_KEYS(K_LSHIFT, SCANCODE_LEFTSHIFT);
   163 	UPDATE_SPECIAL_KEYS(K_CTRL, SCANCODE_LEFTCONTROL);
   164 	UPDATE_SPECIAL_KEYS(K_ALT, SCANCODE_LEFTALT);
   165 	UPDATE_SPECIAL_KEYS(K_CAPSLOCK, SCANCODE_CAPSLOCK);
   166 }
   167 
   168 static SDL_keysym *TranslateKey(int scancode, int asciicode, SDL_keysym *keysym)
   169 {
   170 	/* Set the keysym information */
   171 	keysym->scancode = scancode;
   172 
   173 	if (asciicode)
   174 		keysym->sym = asciicode;		
   175 	else
   176 		keysym->sym = keymap[scancode];
   177 
   178 	keysym->mod = KMOD_NONE;
   179 	keysym->unicode = 0;
   180 
   181 	return(keysym);
   182 }
   183 
   184 void AtariBios_ShutdownEvents(void)
   185 {
   186 	SDL_AtariXbios_RestoreVectors();
   187 }