mirror of
https://gitlab.freedesktop.org/libinput/libinput.git
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fb8d285566
Previously we restricted rotation to trackballs only and to multiples of 90 degrees. Update rotation allow angles other than multiples of 90. Also enable rotation on all mice. The only devices without rotation are now pointing sticks. Fixes #827 Signed-off-by: Lucas Zampieri <lzampier@redhat.com>
173 lines
4 KiB
C
173 lines
4 KiB
C
/*
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* Copyright © 2008 Kristian Høgsberg
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* Copyright © 2013-2015 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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#pragma once
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#include "config.h"
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#include <string.h>
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#include <stdbool.h>
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#include <math.h>
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struct matrix {
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float val[3][3]; /* [row][col] */
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};
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static inline double
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deg2rad(int degree)
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{
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return M_PI * degree / 180.0;
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}
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static inline void
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matrix_init_identity(struct matrix *m)
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{
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memset(m, 0, sizeof(*m));
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m->val[0][0] = 1;
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m->val[1][1] = 1;
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m->val[2][2] = 1;
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}
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static inline void
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matrix_from_farray6(struct matrix *m, const float values[6])
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{
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matrix_init_identity(m);
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m->val[0][0] = values[0];
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m->val[0][1] = values[1];
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m->val[0][2] = values[2];
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m->val[1][0] = values[3];
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m->val[1][1] = values[4];
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m->val[1][2] = values[5];
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}
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static inline void
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matrix_init_scale(struct matrix *m, float sx, float sy)
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{
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matrix_init_identity(m);
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m->val[0][0] = sx;
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m->val[1][1] = sy;
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}
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static inline void
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matrix_init_translate(struct matrix *m, float x, float y)
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{
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matrix_init_identity(m);
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m->val[0][2] = x;
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m->val[1][2] = y;
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}
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static inline void
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matrix_init_rotate(struct matrix *m, int degrees)
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{
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double s, c;
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s = sin(deg2rad(degrees));
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c = cos(deg2rad(degrees));
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matrix_init_identity(m);
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m->val[0][0] = c;
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m->val[0][1] = -s;
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m->val[1][0] = s;
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m->val[1][1] = c;
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}
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static inline bool
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matrix_is_identity(const struct matrix *m)
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{
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return (m->val[0][0] == 1 &&
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m->val[0][1] == 0 &&
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m->val[0][2] == 0 &&
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m->val[1][0] == 0 &&
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m->val[1][1] == 1 &&
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m->val[1][2] == 0 &&
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m->val[2][0] == 0 &&
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m->val[2][1] == 0 &&
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m->val[2][2] == 1);
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}
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static inline void
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matrix_mult(struct matrix *dest,
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const struct matrix *m1,
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const struct matrix *m2)
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{
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struct matrix m; /* allow for dest == m1 or dest == m2 */
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int row, col, i;
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for (row = 0; row < 3; row++) {
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for (col = 0; col < 3; col++) {
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double v = 0;
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for (i = 0; i < 3; i++) {
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v += m1->val[row][i] * m2->val[i][col];
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}
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m.val[row][col] = v;
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}
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}
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memcpy(dest, &m, sizeof(m));
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}
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static inline void
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matrix_mult_vec(const struct matrix *m, int *x, int *y)
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{
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int tx, ty;
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tx = *x * m->val[0][0] + *y * m->val[0][1] + m->val[0][2];
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ty = *x * m->val[1][0] + *y * m->val[1][1] + m->val[1][2];
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*x = tx;
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*y = ty;
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}
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static inline void
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matrix_mult_vec_double(const struct matrix *m, double *x, double *y)
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{
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double tx, ty;
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tx = *x * m->val[0][0] + *y * m->val[0][1] + m->val[0][2];
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ty = *x * m->val[1][0] + *y * m->val[1][1] + m->val[1][2];
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*x = tx;
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*y = ty;
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}
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static inline void
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matrix_to_farray6(const struct matrix *m, float out[6])
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{
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out[0] = m->val[0][0];
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out[1] = m->val[0][1];
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out[2] = m->val[0][2];
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out[3] = m->val[1][0];
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out[4] = m->val[1][1];
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out[5] = m->val[1][2];
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}
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static inline void
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matrix_to_relative(struct matrix *dest, const struct matrix *src)
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{
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matrix_init_identity(dest);
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dest->val[0][0] = src->val[0][0];
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dest->val[0][1] = src->val[0][1];
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dest->val[1][0] = src->val[1][0];
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dest->val[1][1] = src->val[1][1];
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}
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