/*

    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

*/

#include "SDL_config.h"

/*

 *	Atari keyboard events manager, using BIOS

 *

 *	Patrice Mandin

 */

/* Mint includes */

#include <mint/osbind.h>

#include <mint/cookie.h>

#include "../../events/SDL_sysevents.h"

#include "../../events/SDL_events_c.h"

#include "SDL_atarikeys.h"

#include "SDL_atarievents_c.h"

#include "SDL_xbiosevents_c.h"

#include "SDL_ataridevmouse_c.h"

static unsigned char bios_currentkeyboard[ATARIBIOS_MAXKEYS];

static unsigned char bios_previouskeyboard[ATARIBIOS_MAXKEYS];

static SDL_bool use_dev_mouse = SDL_FALSE;

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));

	use_dev_mouse = (SDL_AtariDevMouse_Open()!=0) ? SDL_TRUE : SDL_FALSE;

	vectors_mask = ATARI_XBIOS_JOYSTICKEVENTS;	/* XBIOS joystick events */

	if (!use_dev_mouse) {

		vectors_mask |= ATARI_XBIOS_MOUSEEVENTS;	/* XBIOS mouse events */

	}

/*	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;

		key_pressed=Bconin(_CON);

		bios_currentkeyboard[(key_pressed>>16)&(ATARIBIOS_MAXKEYS-1)]=0xFF;

	}

	/* 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,

				SDL_Atari_TranslateKey(i, &keysym, SDL_TRUE));

		/* Key unpressed ? */

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

			SDL_PrivateKeyboard(SDL_RELEASED,

				SDL_Atari_TranslateKey(i, &keysym, SDL_FALSE));

	}

	if (use_dev_mouse) {

		SDL_AtariDevMouse_PostMouseEvents(this, SDL_TRUE);

	} else {

		SDL_AtariXbios_PostMouseEvents(this, SDL_TRUE);

	}

	/* Will be previous table */

	SDL_memcpy(bios_previouskeyboard, bios_currentkeyboard, sizeof(bios_previouskeyboard));

}

static void UpdateSpecialKeys(int special_keys_state)

{

#define UPDATE_SPECIAL_KEYS(numbit,scancode) \

	{	\

		if (special_keys_state & (1<<(numbit))) { \

			bios_currentkeyboard[scancode]=0xFF; \

		}	\

	}

	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);

}

void AtariBios_ShutdownEvents(void)

{

	SDL_AtariXbios_RestoreVectors();

	if (use_dev_mouse) {

		SDL_AtariDevMouse_Close();

	}

}