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comparison src/video/ataricommon/SDL_biosevents.c @ 281:c5010ab8ba35

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Added initial support for Atari (thanks Patrice!)
author Sam Lantinga <slouken@libsdl.org>
date Sun, 17 Feb 2002 19:54:28 +0000
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children d8b7eae78652
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280:0ddcea45d829 281:c5010ab8ba35
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 }