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3928f32281
Motion normalization does not work well for devices below the default 1000dpi rate. A 400dpi mouse's minimum movement generates a 2.5 normalized motion, causing it to skip pixels at low speeds even when unaccelerated. Likewise, we don't want 1000dpi mice to be normalized to a 400dpi mouse, it feels sluggish even at higher acceleration speeds. Instead, add a custom acceleration method for lower-dpi mice. At low-speeds, one device unit results in a one-pixel movement. Depending on the DPI factor, the acceleration kicks in earlier and goes to higher acceleration so faster movements with a low-dpi mouse feel approximately the same as the same movement on a higher-dpi mouse. https://bugzilla.redhat.com/show_bug.cgi?id=1231304 Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net> Reviewed-by: Hans de Goede <hdegoede@redhat.com>
88 lines
2.6 KiB
C
88 lines
2.6 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 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_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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int dpi);
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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_low_dpi(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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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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