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
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
|
/* Pango
* pango-types.h:
*
* Copyright (C) 1999 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_TYPES_H__
#define __PANGO_TYPES_H__
#include <glib.h>
#include <glib-object.h>
G_BEGIN_DECLS
typedef struct _PangoLogAttr PangoLogAttr;
typedef struct _PangoEngineLang PangoEngineLang;
typedef struct _PangoEngineShape PangoEngineShape;
typedef struct _PangoFont PangoFont;
typedef struct _PangoFontMap PangoFontMap;
typedef struct _PangoMatrix PangoMatrix;
typedef struct _PangoRectangle PangoRectangle;
/* Dummy typedef - internally it's a 'const char *' */
typedef struct _PangoLanguage PangoLanguage;
/* A index of a glyph into a font. Rendering system dependent
*/
typedef guint32 PangoGlyph;
/* A rectangle. Used to store logical and physical extents of glyphs,
* runs, strings, etc.
*/
struct _PangoRectangle
{
int x;
int y;
int width;
int height;
};
/**
* 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. }
GType pango_matrix_get_type (void);
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);
#define PANGO_SCALE 1024
#define PANGO_PIXELS(d) (((int)(d) + 512) >> 10)
/* The above expression is just slightly wrong for floating point d;
* We'd expect -512.5 => -1 but instead we get 0. That's unlikely
* to matter for practical use and the expression is much more
* compact and faster than alternatives that work exactly for both
* integers and floating point.
*/
/* Macros to translate from extents rectangles to ascent/descent/lbearing/rbearing
*/
#define PANGO_ASCENT(rect) (-(rect).y)
#define PANGO_DESCENT(rect) ((rect).y + (rect).height)
#define PANGO_LBEARING(rect) ((rect).x)
#define PANGO_RBEARING(rect) ((rect).x + (rect).width)
/**
* PangoDirection:
* @PANGO_DIRECTION_LTR: A strong left-to-right direction
* @PANGO_DIRECTION_RTL: A strong right-to-left direction
* @PANGO_DIRECTION_TTB_LTR: Deprecated value; treated the
* same as %PANGO_DIRECTION_RTL.
* @PANGO_DIRECTION_TTB_RTL: Deprecated value; treated the
* same as PANGO_DIRECTION_LTR
* @PANGO_DIRECTION_WEAK_LTR: A weak left-to-right direction
* @PANGO_DIRECTION_WEAK_RTL: A weak right-to-left direction
* @PANGO_DIRECTION_NEUTRAL: No direction specified
*
* The #PangoDirection type represents a direction in the
* Unicode bidirectional algorithm; not every value in this
* enumeration makes sense for every usage of #PangoDirection;
* for example, the return value of pango_unichar_direction()
* and pango_find_base_dir() cannot be %PANGO_DIRECTION_WEAK_LTR
* or %PANGO_DIRECTION_WEAK_RTL, since every character is either
* neutral or has a strong direction; on the other hand
* %PANGO_DIRECTION_NEUTRAL doesn't make sense to pass
* to pango_log2vis_get_embedding_levels().
*
* The %PANGO_DIRECTION_TTB_LTR, %PANGO_DIRECTION_TTB_RTL
* values come from an earlier interpretation of this
* enumeration as the writing direction of a block of
* text and are no longer used; See the Text module of the
* CSS3 spec for how vertical text is planned to be handled
* in a future version of Pango. The explanation of why
* %PANGO_DIRECTION_TTB_LTR is treated as %PANGO_DIRECTION_RTL
* can be found there as well.
**/
typedef enum {
PANGO_DIRECTION_LTR,
PANGO_DIRECTION_RTL,
PANGO_DIRECTION_TTB_LTR,
PANGO_DIRECTION_TTB_RTL,
PANGO_DIRECTION_WEAK_LTR,
PANGO_DIRECTION_WEAK_RTL,
PANGO_DIRECTION_NEUTRAL
} PangoDirection;
#define PANGO_TYPE_LANGUAGE (pango_language_get_type ())
GType pango_language_get_type (void);
PangoLanguage *pango_language_from_string (const char *language);
#define pango_language_to_string(language) ((const char *)language)
gboolean pango_language_matches (PangoLanguage *language,
const char *range_list);
#ifndef PANGO_DISABLE_DEPRECATED
gboolean pango_get_mirror_char (gunichar ch,
gunichar *mirrored_ch);
#endif
PangoDirection pango_unichar_direction (gunichar ch);
PangoDirection pango_find_base_dir (const gchar *text,
gint length);
G_END_DECLS
#endif /* __PANGO_TYPES_H__ */
|
