1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
|
/*
* Copyright (C) 2002, 2006 Red Hat Software
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <glib.h>
#include <glib-object.h>
G_BEGIN_DECLS
typedef struct _Pango2Matrix Pango2Matrix;
/**
* Pango2Matrix:
* @xx: 1st component of the transformation matrix
* @xy: 2nd component of the transformation matrix
* @yx: 3rd component of the transformation matrix
* @yy: 4th component of the transformation matrix
* @x0: x translation
* @y0: y translation
*
* A `Pango2Matrix` specifies a transformation between user-space
* and device coordinates.
*
* The transformation is given by
*
* ```
* x_device = x_user * matrix->xx + y_user * matrix->xy + matrix->x0;
* y_device = x_user * matrix->yx + y_user * matrix->yy + matrix->y0;
* ```
*/
struct _Pango2Matrix
{
double xx;
double xy;
double yx;
double yy;
double x0;
double y0;
};
#define PANGO2_TYPE_MATRIX (pango2_matrix_get_type ())
/**
* PANGO2_MATRIX_INIT:
*
* Constant that can be used to initialize a `Pango2Matrix` to
* the identity transform.
*
* ```
* Pango2Matrix matrix = PANGO2_MATRIX_INIT;
* pango2_matrix_rotate (&matrix, 45.);
* ```
*/
#define PANGO2_MATRIX_INIT { 1., 0., 0., 1., 0., 0. }
#include <pango2/pango-types.h>
PANGO2_AVAILABLE_IN_ALL
GType pango2_matrix_get_type (void) G_GNUC_CONST;
PANGO2_AVAILABLE_IN_ALL
Pango2Matrix * pango2_matrix_copy (const Pango2Matrix *matrix);
PANGO2_AVAILABLE_IN_ALL
void pango2_matrix_free (Pango2Matrix *matrix);
PANGO2_AVAILABLE_IN_ALL
gboolean pango2_matrix_equal (const Pango2Matrix *m1,
const Pango2Matrix *m2);
PANGO2_AVAILABLE_IN_ALL
void pango2_matrix_translate (Pango2Matrix *matrix,
double tx,
double ty);
PANGO2_AVAILABLE_IN_ALL
void pango2_matrix_scale (Pango2Matrix *matrix,
double scale_x,
double scale_y);
PANGO2_AVAILABLE_IN_ALL
void pango2_matrix_rotate (Pango2Matrix *matrix,
double degrees);
PANGO2_AVAILABLE_IN_ALL
void pango2_matrix_concat (Pango2Matrix *matrix,
const Pango2Matrix *new_matrix);
PANGO2_AVAILABLE_IN_ALL
void pango2_matrix_transform_point (const Pango2Matrix *matrix,
double *x,
double *y);
PANGO2_AVAILABLE_IN_ALL
void pango2_matrix_transform_distance (const Pango2Matrix *matrix,
double *dx,
double *dy);
PANGO2_AVAILABLE_IN_ALL
void pango2_matrix_transform_rectangle (const Pango2Matrix *matrix,
Pango2Rectangle *rect);
PANGO2_AVAILABLE_IN_ALL
void pango2_matrix_transform_pixel_rectangle (const Pango2Matrix *matrix,
Pango2Rectangle *rect);
PANGO2_AVAILABLE_IN_ALL
double pango2_matrix_get_font_scale_factor (const Pango2Matrix *matrix) G_GNUC_PURE;
PANGO2_AVAILABLE_IN_ALL
void pango2_matrix_get_font_scale_factors (const Pango2Matrix *matrix,
double *xscale,
double *yscale);
PANGO2_AVAILABLE_IN_ALL
double pango2_matrix_get_rotation (const Pango2Matrix *matrix) G_GNUC_PURE;
PANGO2_AVAILABLE_IN_ALL
double pango2_matrix_get_slant_ratio (const Pango2Matrix *matrix) G_GNUC_PURE;
G_DEFINE_AUTOPTR_CLEANUP_FUNC(Pango2Matrix, pango2_matrix_free)
G_END_DECLS
|
