/*

SDL - Simple DirectMedia Layer

Copyright (C) 1997-2006 Sam Lantinga

This library is free software; you can redistribute it and/or

modify it under the terms of the GNU Lesser General Public

License as published by the Free Software Foundation; either

version 2.1 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

Lesser General Public License for more details.

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

Sam Lantinga

slouken@libsdl.org

*/

/*

* Atari keyboard events manager, using BIOS

*

* Patrice Mandin

*/

/* Mint includes */

#include <mint/osbind.h>

#include <mint/cookie.h>

#include "SDL_sysevents.h"

#include "SDL_events_c.h"

#include "SDL_atarikeys.h"

#include "SDL_atarievents_c.h"

#include "SDL_xbiosevents_c.h"

/* 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];

static SDL_keysym *TranslateKey(int scancode, int asciicode, SDL_keysym *keysym,

SDL_bool pressed);

static void UpdateSpecialKeys(int special_keys_state);

void AtariBios_InitOSKeymap(_THIS)

{

int i, vectors_mask;

unsigned long dummy;

SDL_memset(bios_currentkeyboard, 0, sizeof(bios_currentkeyboard));

SDL_memset(bios_previouskeyboard, 0, sizeof(bios_previouskeyboard));

/* 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;

vectors_mask = ATARI_XBIOS_MOUSEEVENTS|ATARI_XBIOS_JOYSTICKEVENTS;

if (Getcookie(C_MiNT, &dummy)==C_FOUND) {

vectors_mask = 0;

}

SDL_AtariXbios_InstallVectors(vectors_mask);

}

void AtariBios_PumpEvents(_THIS)

{

int i;

SDL_keysym keysym;

/* Update pressed keys */

SDL_memset(bios_currentkeyboard, 0, ATARIBIOS_MAXKEYS);

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])

SDL_PrivateKeyboard(SDL_PRESSED,

TranslateKey(i, bios_currentascii[i], &keysym, SDL_TRUE));

/* Key unpressed ? */

if (bios_previouskeyboard[i] && !bios_currentkeyboard[i])

SDL_PrivateKeyboard(SDL_RELEASED,

TranslateKey(i, bios_currentascii[i], &keysym, SDL_FALSE));

}

SDL_AtariXbios_PostMouseEvents(this, SDL_TRUE);

/* Will be previous table */

SDL_memcpy(bios_previouskeyboard, bios_currentkeyboard, ATARIBIOS_MAXKEYS);

}

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);

}

static SDL_keysym *TranslateKey(int scancode, int asciicode, SDL_keysym *keysym,

SDL_bool pressed)

{

/* Set the keysym information */

keysym->scancode = scancode;

if (asciicode)

keysym->sym = asciicode;

else

keysym->sym = keymap[scancode];

keysym->mod = KMOD_NONE;

keysym->unicode = 0;

if (SDL_TranslateUNICODE && pressed) {

keysym->unicode = SDL_AtariToUnicodeTable[asciicode];

}

return(keysym);

}

void AtariBios_ShutdownEvents(void)

{

SDL_AtariXbios_RestoreVectors();

}