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105e725602
Our motion filter takes the last couple of vectors to calculate speed, provided the direction stays the same and it is within a certain timeout. It does not take into account lifting the finger, so the velocity on the first event is off. Real-world impact is mainly on scrolling. Before commit289e4675filter: enforce minimum velocity the first motion on a scroll was accelerated by a factor of 0 and swallowed. After289e4675the motion was calculated based on the timeout and a fraction of the expected effect. Now the first scroll motion is based on the real finger motion since setting the finger down and thus feels a bit more responsive. It also makes a couple of test cases using litest_assert_scroll() work again since the miniumum motion is now as expected. Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net> Reviewed-by: Hans de Goede <hdegoede@redhat.com>
81 lines
2.5 KiB
C
81 lines
2.5 KiB
C
/*
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* Copyright © 2012 Jonas Ådahl
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* Copyright © 2014-2015 Red Hat, Inc.
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*
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* Permission to use, copy, modify, distribute, and sell this software and
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* its documentation for any purpose is hereby granted without fee, provided
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* that the above copyright notice appear in all copies and that both that
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* copyright notice and this permission notice appear in supporting
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* documentation, and that the name of the copyright holders not be used in
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* advertising or publicity pertaining to distribution of the software
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* without specific, written prior permission. The copyright holders make
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* no representations about the suitability of this software for any
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* purpose. It is provided "as is" without express or implied warranty.
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*
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* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
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* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
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* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
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* CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifndef FILTER_H
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#define FILTER_H
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#include "config.h"
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#include <stdbool.h>
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#include <stdint.h>
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#include "libinput-private.h"
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struct motion_filter;
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struct normalized_coords
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filter_dispatch(struct motion_filter *filter,
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const struct normalized_coords *unaccelerated,
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void *data, uint64_t time);
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void
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filter_restart(struct motion_filter *filter,
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void *data, uint64_t time);
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void
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filter_destroy(struct motion_filter *filter);
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bool
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filter_set_speed(struct motion_filter *filter,
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double speed);
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double
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filter_get_speed(struct motion_filter *filter);
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typedef double (*accel_profile_func_t)(struct motion_filter *filter,
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void *data,
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double velocity,
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uint64_t time);
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struct motion_filter *
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create_pointer_accelerator_filter(accel_profile_func_t filter);
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/*
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* Pointer acceleration profiles.
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*/
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double
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pointer_accel_profile_linear(struct motion_filter *filter,
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void *data,
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double speed_in,
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uint64_t time);
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double
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touchpad_accel_profile_linear(struct motion_filter *filter,
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void *data,
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double speed_in,
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uint64_t time);
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double
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touchpad_lenovo_x230_accel_profile(struct motion_filter *filter,
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void *data,
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double speed_in,
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uint64_t time);
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#endif /* FILTER_H */
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