163 lines
5.0 KiB
C
163 lines
5.0 KiB
C
#ifndef __MATRIX_H__
|
|
#define __MATRIX_H__
|
|
|
|
/* Port from ejoy2d: https://github.com/cloudwu/ejoy2d/blob/master/LICENSE
|
|
* Original License:
|
|
*
|
|
* The MIT License (MIT)
|
|
*
|
|
* Copyright (c) 2013 Ejoy.com Inc.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy of
|
|
* this software and associated documentation files (the "Software"), to deal in
|
|
* the Software without restriction, including without limitation the rights to
|
|
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
|
|
* the Software, and to permit persons to whom the Software is furnished to do so,
|
|
* subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in all
|
|
* copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
|
|
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
|
|
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
|
|
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
|
|
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
*/
|
|
|
|
/* Port to RTGUI and modified by Grissiom */
|
|
|
|
#ifdef _MSC_VER
|
|
typedef __int32 int32_t;
|
|
typedef unsigned __int32 uint32_t;
|
|
typedef __int64 int64_t;
|
|
typedef unsigned __int64 uint64_t;
|
|
#else
|
|
#include <stdint.h>
|
|
#endif
|
|
|
|
#define RTGUI_MATRIX_FRAC_BITS 11
|
|
#define RTGUI_MATRIX_FRAC (1 << RTGUI_MATRIX_FRAC_BITS)
|
|
|
|
struct rtgui_matrix
|
|
{
|
|
/* The matrix format is :
|
|
*
|
|
* | m[0] m[1] 0 |
|
|
* | m[2] m[3] 0 |
|
|
* | m[4] m[5] 1 |
|
|
*
|
|
* The format of the coordinate of a point is:
|
|
*
|
|
* | x y 1 |
|
|
*
|
|
* So, if you want to transform a point p with a matrix m, do:
|
|
*
|
|
* p * m
|
|
*
|
|
* Note: m[0-3] is in fix presentation that has 10 bits decimal
|
|
* fraction(m/RTGUI_MATRIX_FRAC). While the unit of m[4-5] is pixel.
|
|
*
|
|
*/
|
|
int m[6];
|
|
};
|
|
|
|
rt_inline int32_t _rtgui_matrix_round_div32(int32_t n, int32_t d)
|
|
{
|
|
if (n == 0)
|
|
return 0;
|
|
|
|
if (d < 0)
|
|
{
|
|
d = -d;
|
|
n = -n;
|
|
}
|
|
if (n > 0)
|
|
return (n + d / 2) / d;
|
|
else
|
|
return (n - d / 2) / d;
|
|
}
|
|
|
|
rt_inline int32_t _rtgui_matrix_round_div6432(int64_t n, int32_t d)
|
|
{
|
|
if (n == 0)
|
|
return 0;
|
|
|
|
if (d < 0)
|
|
{
|
|
d = -d;
|
|
n = -n;
|
|
}
|
|
if (n > 0)
|
|
return (n + d / 2) / d;
|
|
else
|
|
return (n - d / 2) / d;
|
|
}
|
|
|
|
/* mm = mm1 * mm2 */
|
|
rt_inline void rtgui_matrix_mul(struct rtgui_matrix *mm,
|
|
const struct rtgui_matrix *mm1,
|
|
const struct rtgui_matrix *mm2)
|
|
{
|
|
int *m = mm->m;
|
|
const int *m1 = mm1->m;
|
|
const int *m2 = mm2->m;
|
|
|
|
m[0] = _rtgui_matrix_round_div32(m1[0] * m2[0] + m1[1] * m2[2], RTGUI_MATRIX_FRAC);
|
|
m[1] = _rtgui_matrix_round_div32(m1[0] * m2[1] + m1[1] * m2[3], RTGUI_MATRIX_FRAC);
|
|
m[2] = _rtgui_matrix_round_div32(m1[2] * m2[0] + m1[3] * m2[2], RTGUI_MATRIX_FRAC);
|
|
m[3] = _rtgui_matrix_round_div32(m1[2] * m2[1] + m1[3] * m2[3], RTGUI_MATRIX_FRAC);
|
|
m[4] = _rtgui_matrix_round_div32(m1[4] * m2[0] + m1[5] * m2[2], RTGUI_MATRIX_FRAC) + m2[4];
|
|
m[5] = _rtgui_matrix_round_div32(m1[4] * m2[1] + m1[5] * m2[3], RTGUI_MATRIX_FRAC) + m2[5];
|
|
}
|
|
|
|
/* Matrix multiply point[(p) = (x, y) * m], ignore the movement components. */
|
|
rt_inline void rtgui_matrix_mul_point_nomove(struct rtgui_point *p,
|
|
int x, int y,
|
|
struct rtgui_matrix *m)
|
|
{
|
|
int *mm = m->m;
|
|
|
|
p->x = _rtgui_matrix_round_div32(x * mm[0] + y * mm[2], RTGUI_MATRIX_FRAC);
|
|
p->y = _rtgui_matrix_round_div32(x * mm[1] + y * mm[3], RTGUI_MATRIX_FRAC);
|
|
}
|
|
|
|
/* Matrix multiply point[(p) = (x, y) * m]. */
|
|
rt_inline void rtgui_matrix_mul_point(struct rtgui_point *p,
|
|
int x, int y,
|
|
struct rtgui_matrix *m)
|
|
{
|
|
int *mm = m->m;
|
|
|
|
p->x = _rtgui_matrix_round_div32(x * mm[0] + y * mm[2], RTGUI_MATRIX_FRAC) + mm[4];
|
|
p->y = _rtgui_matrix_round_div32(x * mm[1] + y * mm[3], RTGUI_MATRIX_FRAC) + mm[5];
|
|
}
|
|
|
|
/** Set @mm to an identity matrix. */
|
|
rt_inline void rtgu_matrix_identity(struct rtgui_matrix *mm)
|
|
{
|
|
int *mat = mm->m;
|
|
mat[0] = RTGUI_MATRIX_FRAC;
|
|
mat[1] = 0;
|
|
mat[2] = 0;
|
|
mat[3] = RTGUI_MATRIX_FRAC;
|
|
mat[4] = 0;
|
|
mat[5] = 0;
|
|
}
|
|
|
|
/** Save the inversed matrix of @mm to @mo.
|
|
*
|
|
* @return If the matrix is not inversale, return 1. Otherwise, return 0. */
|
|
int rtgui_matrix_inverse(const struct rtgui_matrix *mm, struct rtgui_matrix *mo);
|
|
|
|
/** @degree range from 0 ~ 512. */
|
|
void rtgui_matrix_rotate(struct rtgui_matrix *m, int degree);
|
|
/** The unit is fixed point number. RTGUI_MATRIX_FRAC means 1.0. */
|
|
void rtgui_matrix_scale(struct rtgui_matrix *m, int sx, int sy);
|
|
/** The unit is pixel. Not the fixed point number. */
|
|
void rtgui_matrix_move(struct rtgui_matrix *m, int dx, int dy);
|
|
|
|
#endif /* end of include guard: __MATRIX_H__ */
|
|
|