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SDL_ikbdevents.c
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/*
SDL - Simple DirectMedia Layer
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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
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Sam Lantinga
slouken@libsdl.org
*/
#ifdef SAVE_RCSID
static char rcsid =
"@(#) $Id$";
#endif
/*
* Atari keyboard events manager, using hardware IKBD
*
* Patrice Mandin
*/
#include <string.h>
/* Mint includes */
#include <mint/osbind.h>
#include "SDL.h"
#include "SDL_sysevents.h"
#include "SDL_events_c.h"
#include "SDL_atarikeys.h"
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#include "SDL_atarievents_c.h"
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#include "SDL_ikbdinterrupt_s.h"
/* Special keys state */
enum {
K_RSHIFT=0,
K_LSHIFT,
K_CTRL,
K_ALT,
K_CAPSLOCK,
K_CLRHOME,
K_INSERT
};
#define ATARIBIOS_MAXKEYS 128
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#define KEY_PRESSED 0xff
#define KEY_UNDEFINED 0x80
#define KEY_RELEASED 0x00
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/* The translation tables from a console scancode to a SDL keysym */
#define KT_NOCHANGE -1
enum {
KT_UNSHIFT=0,
KT_SHIFT=1,
KT_CAPS=2
};
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static Uint16 atari_prevmouseb; /* save state of mouse buttons */
static int caps_state; /* caps lock state */
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_KEYTAB *curtables;
static unsigned char *tab_unshift, *tab_shift, *tab_caps;
static SDLKey keymap[ATARIBIOS_MAXKEYS];
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static SDL_keysym *TranslateKey(int scancode, int numkeytable, SDL_keysym *keysym,
SDL_bool pressed);
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void AtariIkbd_InitOSKeymap(_THIS)
{
int i;
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memset(SDL_AtariIkbd_keyboard, KEY_UNDEFINED, ATARIBIOS_MAXKEYS);
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/* Initialize keymap */
for ( i=0; i<sizeof(keymap); i++ )
keymap[i] = SDLK_UNKNOWN;
/* Functions keys */
for ( i = 0; i<10; i++ )
keymap[SCANCODE_F1 + i] = SDLK_F1+i;
/* Cursor keypad */
keymap[SCANCODE_HELP] = SDLK_HELP;
keymap[SCANCODE_UNDO] = SDLK_UNDO;
keymap[SCANCODE_INSERT] = SDLK_INSERT;
keymap[SCANCODE_CLRHOME] = SDLK_HOME;
keymap[SCANCODE_UP] = SDLK_UP;
keymap[SCANCODE_DOWN] = SDLK_DOWN;
keymap[SCANCODE_RIGHT] = SDLK_RIGHT;
keymap[SCANCODE_LEFT] = SDLK_LEFT;
/* Special keys */
keymap[SCANCODE_ESCAPE] = SDLK_ESCAPE;
keymap[SCANCODE_BACKSPACE] = SDLK_BACKSPACE;
keymap[SCANCODE_TAB] = SDLK_TAB;
keymap[SCANCODE_ENTER] = SDLK_RETURN;
keymap[SCANCODE_DELETE] = SDLK_DELETE;
keymap[SCANCODE_LEFTCONTROL] = SDLK_LCTRL;
keymap[SCANCODE_LEFTSHIFT] = SDLK_LSHIFT;
keymap[SCANCODE_RIGHTSHIFT] = SDLK_RSHIFT;
keymap[SCANCODE_LEFTALT] = SDLK_LALT;
keymap[SCANCODE_CAPSLOCK] = SDLK_CAPSLOCK;
/* Read XBIOS tables for scancode -> ascii translation */
curtables=Keytbl(KT_NOCHANGE, KT_NOCHANGE, KT_NOCHANGE);
tab_unshift=curtables->unshift;
tab_shift=curtables->shift;
tab_caps=curtables->caps;
/* Set Caps lock initial state */
caps_state=(Kbshift(-1) & (1<<K_CAPSLOCK));
/* Now install our handler */
SDL_AtariIkbd_mouseb = SDL_AtariIkbd_mousex = SDL_AtariIkbd_mousey = 0;
atari_prevmouseb = 0;
Supexec(SDL_AtariIkbdInstall);
}
static int atari_GetButton(int button)
{
switch(button)
{
case 0:
return SDL_BUTTON_RIGHT;
break;
case 1:
default:
return SDL_BUTTON_LEFT;
break;
}
}
void AtariIkbd_PumpEvents(_THIS)
{
int i;
SDL_keysym keysym;
int specialkeys;
/*--- Send keyboard events ---*/
/* Update caps lock state */
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if (SDL_AtariIkbd_keyboard[SCANCODE_CAPSLOCK]==KEY_PRESSED) {
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caps_state ^= 1;
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}
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/* Choose the translation table */
specialkeys=KT_UNSHIFT;
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if ((SDL_AtariIkbd_keyboard[SCANCODE_LEFTSHIFT]==KEY_PRESSED)
|| (SDL_AtariIkbd_keyboard[SCANCODE_RIGHTSHIFT]==KEY_PRESSED))
{
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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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}
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/* Now generate events */
for (i=0; i<ATARIBIOS_MAXKEYS; i++) {
/* Key pressed ? */
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if (SDL_AtariIkbd_keyboard[i]==KEY_PRESSED) {
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SDL_PrivateKeyboard(SDL_PRESSED,
TranslateKey(i, specialkeys, &keysym, SDL_TRUE));
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SDL_AtariIkbd_keyboard[i]=KEY_UNDEFINED;
}
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/* Key released ? */
if (SDL_AtariIkbd_keyboard[i]==KEY_RELEASED) {
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SDL_PrivateKeyboard(SDL_RELEASED,
TranslateKey(i, specialkeys, &keysym, SDL_FALSE));
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SDL_AtariIkbd_keyboard[i]=KEY_UNDEFINED;
}
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}
/*--- Send mouse events ---*/
/* Mouse motion ? */
if (SDL_AtariIkbd_mousex || SDL_AtariIkbd_mousey) {
SDL_PrivateMouseMotion(0, 1, SDL_AtariIkbd_mousex, SDL_AtariIkbd_mousey);
SDL_AtariIkbd_mousex = SDL_AtariIkbd_mousey = 0;
}
/* Mouse button ? */
if (SDL_AtariIkbd_mouseb != atari_prevmouseb) {
for (i=0;i<2;i++) {
int curbutton, prevbutton;
curbutton = SDL_AtariIkbd_mouseb & (1<<i);
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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if (!curbutton && prevbutton) {
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SDL_PrivateMouseButton(SDL_RELEASED, atari_GetButton(i), 0, 0);
}
}
atari_prevmouseb = SDL_AtariIkbd_mouseb;
}
}
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static SDL_keysym *TranslateKey(int scancode, int numkeytable, SDL_keysym *keysym,
SDL_bool pressed)
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{
unsigned char asciicode;
/* Set the keysym information */
keysym->scancode = scancode;
asciicode=0;
switch(numkeytable) {
case KT_UNSHIFT:
asciicode=tab_unshift[scancode];
break;
case KT_SHIFT:
asciicode=tab_shift[scancode];
break;
case KT_CAPS:
asciicode=tab_caps[scancode];
break;
}
if (asciicode)
keysym->sym = asciicode;
else
keysym->sym = keymap[scancode];
keysym->mod = KMOD_NONE;
keysym->unicode = 0;
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if (pressed && (asciicode!=0)) {
keysym->unicode = SDL_AtariToUnicode(asciicode);
}
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return(keysym);
}
void AtariIkbd_ShutdownEvents(void)
{
Supexec(SDL_AtariIkbdUninstall);
}