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* Multitouch X driver
* Copyright (C) 2008 Henrik Rydberg <>
* 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 2 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
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#ifndef MEMORY_H
#define MEMORY_H
#include "mtstate.h"
* struct Memory - parsing state
* @btdata: logical finger state
* @same: true if the finger configuration is unchanged
* @fingers: bitmask of fingers on the pad
* @added: bitmask of new fingers on the pad
* @thumb: bitmask of thumbs on the pad
* @pointing: bitmask of pointing fingers
* @pending: bitmask of tentatively moving fingers
* @moving: bitmask of moving fingers
* @ybar: vertical position on pad marking the clicking area
* @mvhold: movement before this point in time is accumulated
* @mvforget: movement before this point in time is discarded
* @dx: array of accumulated horiontal movement per finger
* @dy: array of accumulated vertical movement per finger
* @tpdown: time of first touch
* @tpup: time of last release
* @tprelax: time of next possible touch
* @xdown: x position of first touch
* @ydown: y position of first touch
* @xup: x position of last release
* @yup: y position of last release
* @wait: time to wait for a second tap
* @maxtap: max number of pointing fingers during touch
* @ntap: number of taps in sequence
struct Memory {
bitmask_t btdata, same;
bitmask_t fingers, added, thumb;
bitmask_t pointing, pending, moving;
int ybar;
mstime_t mvhold, mvforget;
mstime_t tpdown, tpup, tprelax;
int xdown, ydown, xup, yup;
int wait, maxtap, ntap;
void init_memory(struct Memory *mem);
void refresh_memory(struct Memory *m,
const struct MTState *prev_state,
const struct MTState *state,
const struct Capabilities *caps);
void output_memory(const struct Memory *m);
static inline void mem_hold_movement(struct Memory *m, mstime_t t)
if (t > m->mvhold)
m->mvhold = t;
static inline void mem_forget_movement(struct Memory *m, mstime_t t)
if (t > m->mvforget)
m->mvforget = t;