/usr/include/pango-1.0/pango/pango-matrix.h is in libpango1.0-dev 1.40.14-1ubuntu0.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 | /* Pango
* pango-matrix.h: Matrix manipulation routines
*
* Copyright (C) 2002, 2006 Red Hat Software
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __PANGO_MATRIX_H__
#define __PANGO_MATRIX_H__
#include <glib.h>
#include <glib-object.h>
G_BEGIN_DECLS
typedef struct _PangoMatrix PangoMatrix;
/**
* PangoMatrix:
* @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 structure specifying a transformation between user-space
* coordinates and device coordinates. The transformation
* is given by
*
* <programlisting>
* x_device = x_user * matrix->xx + y_user * matrix->xy + matrix->x0;
* y_device = x_user * matrix->yx + y_user * matrix->yy + matrix->y0;
* </programlisting>
*
* Since: 1.6
**/
struct _PangoMatrix
{
double xx;
double xy;
double yx;
double yy;
double x0;
double y0;
};
/**
* PANGO_TYPE_MATRIX:
*
* The GObject type for #PangoMatrix
**/
#define PANGO_TYPE_MATRIX (pango_matrix_get_type ())
/**
* PANGO_MATRIX_INIT:
*
* Constant that can be used to initialize a PangoMatrix to
* the identity transform.
*
* <informalexample><programlisting>
* PangoMatrix matrix = PANGO_MATRIX_INIT;
* pango_matrix_rotate (&matrix, 45.);
* </programlisting></informalexample>
*
* Since: 1.6
**/
#define PANGO_MATRIX_INIT { 1., 0., 0., 1., 0., 0. }
/* for PangoRectangle */
#include <pango/pango-types.h>
PANGO_AVAILABLE_IN_1_6
GType pango_matrix_get_type (void) G_GNUC_CONST;
PANGO_AVAILABLE_IN_1_6
PangoMatrix *pango_matrix_copy (const PangoMatrix *matrix);
PANGO_AVAILABLE_IN_1_6
void pango_matrix_free (PangoMatrix *matrix);
PANGO_AVAILABLE_IN_1_6
void pango_matrix_translate (PangoMatrix *matrix,
double tx,
double ty);
PANGO_AVAILABLE_IN_1_6
void pango_matrix_scale (PangoMatrix *matrix,
double scale_x,
double scale_y);
PANGO_AVAILABLE_IN_1_6
void pango_matrix_rotate (PangoMatrix *matrix,
double degrees);
PANGO_AVAILABLE_IN_1_6
void pango_matrix_concat (PangoMatrix *matrix,
const PangoMatrix *new_matrix);
PANGO_AVAILABLE_IN_1_16
void pango_matrix_transform_point (const PangoMatrix *matrix,
double *x,
double *y);
PANGO_AVAILABLE_IN_1_16
void pango_matrix_transform_distance (const PangoMatrix *matrix,
double *dx,
double *dy);
PANGO_AVAILABLE_IN_1_16
void pango_matrix_transform_rectangle (const PangoMatrix *matrix,
PangoRectangle *rect);
PANGO_AVAILABLE_IN_1_16
void pango_matrix_transform_pixel_rectangle (const PangoMatrix *matrix,
PangoRectangle *rect);
PANGO_AVAILABLE_IN_1_12
double pango_matrix_get_font_scale_factor (const PangoMatrix *matrix) G_GNUC_PURE;
PANGO_AVAILABLE_IN_1_38
void pango_matrix_get_font_scale_factors (const PangoMatrix *matrix,
double *xscale, double *yscale);
G_END_DECLS
#endif /* __PANGO_MATRIX_H__ */
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