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99334e11bf
libinput applies averaging to the velocity of most pointer devices. Averaging the velocity makes the motion look smooth and may be of benefit to bad input devices. For good devices, however, it comes at the unfortunate price of decreased accuaracy. This change turns velocity averaging off by default (sets ntrackers to 2 instead of 16) and allows for it to be turned back on via a quirk, for bad devices which require it.
160 lines
5.1 KiB
C
160 lines
5.1 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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/**
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* Accelerate the given coordinates.
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* Takes a set of unaccelerated deltas and accelerates them based on the
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* current and previous motion.
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*
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* This is a superset of filter_dispatch_constant()
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*
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* @param filter The device's motion filter
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* @param unaccelerated The unaccelerated delta in the device's dpi
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* resolution as specified during filter creation. If a device has uneven
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* resolution for x and y, one axis needs to be scaled to match the
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* originally provided resolution.
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* @param data Custom data
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* @param time The time of the delta
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*
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* @return A set of normalized coordinates that can be used for pixel
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* movement. The normalized coordiantes are scaled to the default dpi range,
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* i.e. regardless of the resolution of the underlying device, the returned
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* values always reflect a 1000dpi mouse.
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*
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* @see filter_dispatch_constant
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*/
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struct normalized_coords
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filter_dispatch(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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/**
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* Apply constant motion filters, but no acceleration.
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*
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* Takes a set of unaccelerated deltas and applies any constant filters to
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* it but does not accelerate the delta in the conventional sense.
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*
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* @param filter The device's motion filter
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* @param unaccelerated The unaccelerated delta in the device's dpi
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* resolution as specified during filter creation. If a device has uneven
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* resolution for x and y, one axis needs to be scaled to match the
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* originally provided resolution.
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* @param data Custom data
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* @param time The time of the delta
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*
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* @see filter_dispatch
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*/
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struct normalized_coords
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filter_dispatch_constant(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
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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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enum libinput_config_accel_profile
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filter_get_type(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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/* Pointer acceleration types */
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struct motion_filter *
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create_pointer_accelerator_filter_flat(int dpi);
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struct motion_filter *
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create_pointer_accelerator_filter_linear(int dpi, bool use_velocity_averaging);
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struct motion_filter *
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create_pointer_accelerator_filter_linear_low_dpi(int dpi, bool use_velocity_averaging);
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struct motion_filter *
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create_pointer_accelerator_filter_touchpad(int dpi,
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uint64_t event_delta_smooth_threshold,
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uint64_t event_delta_smooth_value,
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bool use_velocity_averaging);
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struct motion_filter *
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create_pointer_accelerator_filter_lenovo_x230(int dpi, bool use_velocity_averaging);
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struct motion_filter *
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create_pointer_accelerator_filter_trackpoint(double multiplier, bool use_velocity_averaging);
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struct motion_filter *
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create_pointer_accelerator_filter_tablet(int xres, int yres);
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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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double
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trackpoint_accel_profile(struct motion_filter *filter,
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void *data,
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double delta,
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uint64_t time);
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#endif /* FILTER_H */
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