SDL_biosevents.c
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2006 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 Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 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,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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Sam Lantinga
slouken@libsdl.org
*/
/*
* Atari keyboard events manager, using BIOS
*
* Patrice Mandin
*/
/* Mint includes */
#include <mint/osbind.h>
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#include <mint/cookie.h>
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#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_xbiosevents_c.h"
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/* To save state of keyboard */
#define ATARIBIOS_MAXKEYS 128
static unsigned char bios_currentkeyboard[ATARIBIOS_MAXKEYS];
static unsigned char bios_previouskeyboard[ATARIBIOS_MAXKEYS];
static unsigned char bios_currentascii[ATARIBIOS_MAXKEYS];
/* Special keys state */
enum {
K_RSHIFT=0,
K_LSHIFT,
K_CTRL,
K_ALT,
K_CAPSLOCK,
K_CLRHOME,
K_INSERT
};
/* The translation tables from a console scancode to a SDL keysym */
static SDLKey keymap[ATARIBIOS_MAXKEYS];
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static SDL_keysym *TranslateKey(int scancode, int asciicode, SDL_keysym *keysym,
SDL_bool pressed);
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static void UpdateSpecialKeys(int special_keys_state);
void AtariBios_InitOSKeymap(_THIS)
{
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int i, vectors_mask;
unsigned long dummy;
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SDL_memset(bios_currentkeyboard, 0, sizeof(bios_currentkeyboard));
SDL_memset(bios_previouskeyboard, 0, sizeof(bios_previouskeyboard));
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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;
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vectors_mask = ATARI_XBIOS_MOUSEEVENTS|ATARI_XBIOS_JOYSTICKEVENTS;
if (Getcookie(C_MiNT, &dummy)==C_FOUND) {
vectors_mask = 0;
}
SDL_AtariXbios_InstallVectors(vectors_mask);
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}
void AtariBios_PumpEvents(_THIS)
{
int i;
SDL_keysym keysym;
/* Update pressed keys */
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SDL_memset(bios_currentkeyboard, 0, ATARIBIOS_MAXKEYS);
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while (Bconstat(_CON)) {
unsigned long key_pressed;
unsigned char asciicode, scancode;
key_pressed=Bconin(_CON);
asciicode = key_pressed;
scancode = key_pressed >> 16;
bios_currentkeyboard[scancode]=0xFF;
bios_currentascii[scancode]=asciicode;
}
/* Read special keys */
UpdateSpecialKeys(Kbshift(-1));
/* Now generate events */
for (i=0; i<ATARIBIOS_MAXKEYS; i++) {
/* Key pressed ? */
if (bios_currentkeyboard[i] && !bios_previouskeyboard[i])
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SDL_PrivateKeyboard(SDL_PRESSED,
TranslateKey(i, bios_currentascii[i], &keysym, SDL_TRUE));
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/* Key unpressed ? */
if (bios_previouskeyboard[i] && !bios_currentkeyboard[i])
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SDL_PrivateKeyboard(SDL_RELEASED,
TranslateKey(i, bios_currentascii[i], &keysym, SDL_FALSE));
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SDL_AtariXbios_PostMouseEvents(this, SDL_TRUE);
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/* Will be previous table */
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SDL_memcpy(bios_previouskeyboard, bios_currentkeyboard, ATARIBIOS_MAXKEYS);
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}
static void UpdateSpecialKeys(int special_keys_state)
{
#define UPDATE_SPECIAL_KEYS(numbit,scancode) \
{ \
if (special_keys_state & (1<<(numbit))) { \
bios_currentkeyboard[scancode]=0xFF; \
bios_currentascii[scancode]=0; \
} \
}
UPDATE_SPECIAL_KEYS(K_RSHIFT, SCANCODE_RIGHTSHIFT);
UPDATE_SPECIAL_KEYS(K_LSHIFT, SCANCODE_LEFTSHIFT);
UPDATE_SPECIAL_KEYS(K_CTRL, SCANCODE_LEFTCONTROL);
UPDATE_SPECIAL_KEYS(K_ALT, SCANCODE_LEFTALT);
UPDATE_SPECIAL_KEYS(K_CAPSLOCK, SCANCODE_CAPSLOCK);
}
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static SDL_keysym *TranslateKey(int scancode, int asciicode, SDL_keysym *keysym,
SDL_bool pressed)
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{
/* Set the keysym information */
keysym->scancode = scancode;
if (asciicode)
keysym->sym = asciicode;
else
keysym->sym = keymap[scancode];
keysym->mod = KMOD_NONE;
keysym->unicode = 0;
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if (SDL_TranslateUNICODE && pressed) {
keysym->unicode = SDL_AtariToUnicodeTable[asciicode];
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return(keysym);
}
void AtariBios_ShutdownEvents(void)
{
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SDL_AtariXbios_RestoreVectors();