/*****************************************************************************
 *
 * grail - Gesture Recognition And Instantiation Library
 *
 * Copyright (C) 2010 Canonical Ltd.
 *
 * This program is free software: you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or (at your
 * option) any later version.
 *
 * This program 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
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * Authors:
 *      Henrik Rydberg <rydberg@bitmath.org>
 *
 ****************************************************************************/

#ifndef _GRAIL_H
#define _GRAIL_H

#include <grail-bits.h>
#include <linux/input.h>

#define DIM_GRAIL_TYPE		64
#define DIM_GRAIL_TYPE_BYTES	((DIM_GRAIL_TYPE + 7) >> 3)

#define DIM_GRAIL_PROP		16
#define DIM_GRAIL_PROP_BYTES	((DIM_GRAIL_PROP + 7) >> 3)

#define GRAIL_TYPE_POINTER	0	/* reserved */
#define GRAIL_TYPE_PAN		1	/* two-finger pan/scroll */
#define GRAIL_TYPE_PINCH	2	/* two-finger pinch-to-zoom */
#define GRAIL_TYPE_ROTATE	3	/* two-finger rotation */
#define GRAIL_TYPE_COMBO2	4	/* two-finger combo */
#define GRAIL_TYPE_SWIPE	5	/* three-finger pan */
#define GRAIL_TYPE_SCALE	6	/* three-finger pinch */
#define GRAIL_TYPE_TURN		7	/* three-finger rotate */
#define GRAIL_TYPE_COMBO3	8	/* three-finger combo */

#define GRAIL_TYPE_TAP1		9	/* single one-finger tap */
#define GRAIL_TYPE_TAP2		10	/* single two-finger tap */
#define GRAIL_TYPE_TAP3		11	/* single three-finger tap */
#define GRAIL_TYPE_TAP4		12	/* single four-finger tap */
#define GRAIL_TYPE_TAP5		13	/* single five-finger tap */

#define GRAIL_STATUS_BEGIN	0
#define GRAIL_STATUS_UPDATE	1
#define GRAIL_STATUS_END	2

typedef float grail_prop_t;
typedef __u64 grail_time_t;

struct grail_coord {
	float x, y;
};

struct grail_client_id {
	int client;
	int root, event, child;
};

struct grail_client_info {
	struct grail_client_id id;
	grail_mask_t mask[DIM_GRAIL_TYPE_BYTES];
};

struct grail_event {
	int type;
	int id;
	int status;
	int ntouch;
	int nprop;
	struct grail_coord pos;
	struct grail_client_id client_id;
	grail_time_t time;
	grail_prop_t prop[DIM_GRAIL_PROP];
};

struct grail {
	int (*get_clients)(struct grail *ge,
			   struct grail_client_info *client, int max_clients,
			   const struct grail_coord *coords, int num_coords,
			   const grail_mask_t *types, int type_bytes);
	void (*event)(struct grail *ge,
		      const struct input_event *ev);
	void (*gesture)(struct grail *ge,
			const struct grail_event *ev);
	struct grail_impl *impl;
	struct gesture_inserter *gin;
	struct gesture_recognizer *gru;
	void *priv;
};

int grail_open(struct grail *ge, int fd);
int grail_idle(struct grail *ge, int fd, int ms);
int grail_pull(struct grail *ge, int fd);
void grail_close(struct grail *ge, int fd);

#endif