mirror of
https://gitlab.freedesktop.org/libinput/libinput.git
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130 lines
3.7 KiB
C
130 lines
3.7 KiB
C
/*
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* Copyright © 2012 Jonas Ådahl
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#ifndef FILTER_PRIVATE_H
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#define FILTER_PRIVATE_H
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#include "config.h"
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#include "filter.h"
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struct motion_filter_interface {
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enum libinput_config_accel_profile type;
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struct normalized_coords (*filter)(
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struct motion_filter *filter,
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const struct device_float_coords *unaccelerated,
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void *data, uint64_t time);
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struct normalized_coords (*filter_constant)(
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struct motion_filter *filter,
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const struct device_float_coords *unaccelerated,
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void *data, uint64_t time);
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void (*restart)(struct motion_filter *filter,
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void *data,
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uint64_t time);
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void (*destroy)(struct motion_filter *filter);
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bool (*set_speed)(struct motion_filter *filter,
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double speed_adjustment);
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};
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struct motion_filter {
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double speed_adjustment; /* normalized [-1, 1] */
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const struct motion_filter_interface *interface;
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};
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struct pointer_tracker {
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struct device_float_coords delta; /* delta to most recent event */
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uint64_t time; /* us */
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uint32_t dir;
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};
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/* For smoothing timestamps from devices with unreliable timing */
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struct pointer_delta_smoothener {
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uint64_t threshold;
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uint64_t value;
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};
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struct pointer_trackers {
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struct pointer_tracker *trackers;
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size_t ntrackers;
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unsigned int cur_tracker;
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struct pointer_delta_smoothener *smoothener;
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};
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void trackers_init(struct pointer_trackers *trackers, int ntrackers);
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void trackers_free(struct pointer_trackers *trackers);
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void
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trackers_reset(struct pointer_trackers *trackers,
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uint64_t time);
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void
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trackers_feed(struct pointer_trackers *trackers,
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const struct device_float_coords *delta,
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uint64_t time);
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struct pointer_tracker *
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trackers_by_offset(struct pointer_trackers *trackers, unsigned int offset);
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double
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trackers_velocity(struct pointer_trackers *trackers, uint64_t time);
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double
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calculate_acceleration_simpsons(struct motion_filter *filter,
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accel_profile_func_t profile,
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void *data,
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double velocity,
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double last_velocity,
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uint64_t time);
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/* Convert speed/velocity from units/us to units/ms */
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static inline double
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v_us2ms(double units_per_us)
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{
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return units_per_us * 1000.0;
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}
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static inline double
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v_us2s(double units_per_us)
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{
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return units_per_us * 1000000.0;
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}
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/* Convert speed/velocity from units/ms to units/us */
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static inline double
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v_ms2us(double units_per_ms)
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{
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return units_per_ms/1000.0;
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}
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static inline struct normalized_coords
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normalize_for_dpi(const struct device_float_coords *coords, int dpi)
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{
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struct normalized_coords norm;
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norm.x = coords->x * DEFAULT_MOUSE_DPI/dpi;
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norm.y = coords->y * DEFAULT_MOUSE_DPI/dpi;
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return norm;
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}
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#endif
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