/*

     SDL - Simple DirectMedia Layer

     Copyright (C) 1997-2012 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 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;

 	SDL_AtariMint_BackgroundTasks();

 	/* 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();

 	}

 }