src/video/ataricommon/SDL_biosevents.c
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     1 /*
       
     2     SDL - Simple DirectMedia Layer
       
     3     Copyright (C) 1997, 1998, 1999, 2000, 2001  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_xbiosmouseevents_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 	AtariXbios_InstallMouseVector();
       
   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, 0, &keysym));
       
   143 	}
       
   144 
       
   145 	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 	AtariXbios_RestoreMouseVector();
       
   187 }