/usr/include/pango-1.0/pango/pango-matrix.h is in libpango1.0-dev 1.30.0-0ubuntu2.
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 | /* 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>
GType pango_matrix_get_type (void) G_GNUC_CONST;
PangoMatrix *pango_matrix_copy (const PangoMatrix *matrix);
void pango_matrix_free (PangoMatrix *matrix);
void pango_matrix_translate (PangoMatrix *matrix,
double tx,
double ty);
void pango_matrix_scale (PangoMatrix *matrix,
double scale_x,
double scale_y);
void pango_matrix_rotate (PangoMatrix *matrix,
double degrees);
void pango_matrix_concat (PangoMatrix *matrix,
const PangoMatrix *new_matrix);
void pango_matrix_transform_point (const PangoMatrix *matrix,
double *x,
double *y);
void pango_matrix_transform_distance (const PangoMatrix *matrix,
double *dx,
double *dy);
void pango_matrix_transform_rectangle (const PangoMatrix *matrix,
PangoRectangle *rect);
void pango_matrix_transform_pixel_rectangle (const PangoMatrix *matrix,
PangoRectangle *rect);
double pango_matrix_get_font_scale_factor (const PangoMatrix *matrix) G_GNUC_PURE;
G_END_DECLS
#endif /* __PANGO_MATRIX_H__ */
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