/*

    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"

/*

 *	XBIOS mouse & joystick vectors

 *

 *	Patrice Mandin

 */

#include <mint/osbind.h>

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

#include "SDL_xbiosevents_c.h"

#include "SDL_xbiosinterrupt_s.h"

/* Variables */

int SDL_AtariXbios_enabled=0;

/* Local variables */

static _KBDVECS *kbdvecs;		/* Pointer to access system vectors */

static Uint16 atari_prevmouseb;	/* buttons */

/* Functions */

void SDL_AtariXbios_InstallVectors(int vectors_mask)

{

	void *oldpile;

	/* Clear variables */

	SDL_AtariXbios_mouselock =

		SDL_AtariXbios_mouseb =

		SDL_AtariXbios_mousex =

		SDL_AtariXbios_mousey =

		SDL_AtariXbios_joystick =

		atari_prevmouseb = 0;

	if (vectors_mask==0) {

		SDL_AtariXbios_enabled=0;

		return;

	}

	/* Read IKBD vectors base */

	kbdvecs=Kbdvbase();

	/* Go to supervisor mode */

	oldpile=(void *)Super(0);

	/* Install our vectors */

	SDL_AtariXbios_Install(

		kbdvecs,

		(vectors_mask & ATARI_XBIOS_MOUSEEVENTS) ? SDL_AtariXbios_MouseVector : NULL,

		(vectors_mask & ATARI_XBIOS_JOYSTICKEVENTS) ? SDL_AtariXbios_JoystickVector : NULL

	);

	/* Back to user mode */

	Super(oldpile);

	SDL_AtariXbios_enabled=1;

}

void SDL_AtariXbios_RestoreVectors(void)

{

	void *oldpile;

	if (SDL_AtariXbios_enabled==0) {

		return;

	}

	/* Read IKBD vectors base */

	kbdvecs=Kbdvbase();

	/* Go to supervisor mode */

	oldpile=(void *)Super(NULL);

	/* Reinstall system vector */

	SDL_AtariXbios_Restore(kbdvecs);

	/* Back to user mode */

	Super(oldpile);

}

static int atari_GetButton(int button)

{

	switch(button)

	{

		case 0:

			return SDL_BUTTON_RIGHT;

			break;

		case 1:

		default:

			return SDL_BUTTON_LEFT;

			break;

	}

}

void SDL_AtariXbios_PostMouseEvents(_THIS, SDL_bool buttonEvents)

{

	if (SDL_AtariXbios_enabled==0) {

		return;

	}

	/* Mouse motion ? */

	if (SDL_AtariXbios_mousex || SDL_AtariXbios_mousey) {

		SDL_PrivateMouseMotion(0, 1, SDL_AtariXbios_mousex, SDL_AtariXbios_mousey);

		SDL_AtariXbios_mousex = SDL_AtariXbios_mousey = 0;

	}

	/* Mouse button ? */

	if (buttonEvents && (SDL_AtariXbios_mouseb != atari_prevmouseb)) {

		int i;

		for (i=0;i<2;i++) {

			int curbutton, prevbutton;

			curbutton = SDL_AtariXbios_mouseb & (1<<i);

			prevbutton = atari_prevmouseb & (1<<i);

			if (curbutton && !prevbutton) {

				SDL_PrivateMouseButton(SDL_PRESSED, atari_GetButton(i), 0, 0);

			}

			if (!curbutton && prevbutton) {

				SDL_PrivateMouseButton(SDL_RELEASED, atari_GetButton(i), 0, 0);

			}

		}

		atari_prevmouseb = SDL_AtariXbios_mouseb;

	}

}

void SDL_AtariXbios_LockMousePosition(SDL_bool lockPosition)

{

	SDL_AtariXbios_mouselock = lockPosition;

}