2 * Copyright © 2012 Jonas Ådahl
4 * Permission to use, copy, modify, distribute, and sell this software and
5 * its documentation for any purpose is hereby granted without fee, provided
6 * that the above copyright notice appear in all copies and that both that
7 * copyright notice and this permission notice appear in supporting
8 * documentation, and that the name of the copyright holders not be used in
9 * advertising or publicity pertaining to distribution of the software
10 * without specific, written prior permission. The copyright holders make
11 * no representations about the suitability of this software for any
12 * purpose. It is provided "as is" without express or implied warranty.
14 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
15 * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
16 * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
17 * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
18 * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
19 * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
20 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
30 struct motion_params {
31 double dx, dy; /* in units/ms @ 400dpi */
37 filter_dispatch(struct motion_filter *filter,
38 struct motion_params *motion,
39 void *data, uint64_t time);
41 filter_destroy(struct motion_filter *filter);
44 struct motion_filter_interface {
45 void (*filter)(struct motion_filter *filter,
46 struct motion_params *motion,
47 void *data, uint64_t time);
48 void (*destroy)(struct motion_filter *filter);
51 struct motion_filter {
52 struct motion_filter_interface *interface;
55 struct motion_filter *
56 create_linear_acceleration_filter(double speed);
58 typedef double (*accel_profile_func_t)(struct motion_filter *filter,
63 struct motion_filter *
64 create_pointer_accelator_filter(accel_profile_func_t filter);
68 * Pointer acceleration profiles.
72 * Profile similar which is similar to nonaccelerated but with a smooth
73 * transition between accelerated and non-accelerated.
76 pointer_accel_profile_smooth_simple(struct motion_filter *filter,