File: pangofc-font.h

package info (click to toggle)
pango1.0 1.42.4-8~deb10u1
  • links: PTS, VCS
  • area: main
  • in suites: bullseye, buster, sid
  • size: 9,564 kB
  • sloc: ansic: 42,694; sh: 4,360; makefile: 1,075; python: 305; perl: 56; cpp: 20
file content (166 lines) | stat: -rw-r--r-- 5,644 bytes parent folder | download
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
/* Pango
 * pangofc-font.h: Base fontmap type for fontconfig-based backends
 *
 * Copyright (C) 2003 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_FC_FONT_H__
#define __PANGO_FC_FONT_H__

#include <pango/pango.h>

/* Freetype has undefined macros in its header */
#ifdef PANGO_COMPILATION
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wundef"
#endif

#include <ft2build.h>
#include FT_FREETYPE_H
#include <fontconfig/fontconfig.h>

#ifdef PANGO_COMPILATION
#pragma GCC diagnostic pop
#endif

G_BEGIN_DECLS

#define PANGO_TYPE_FC_FONT              (pango_fc_font_get_type ())
#define PANGO_FC_FONT(object)           (G_TYPE_CHECK_INSTANCE_CAST ((object), PANGO_TYPE_FC_FONT, PangoFcFont))
#define PANGO_IS_FC_FONT(object)        (G_TYPE_CHECK_INSTANCE_TYPE ((object), PANGO_TYPE_FC_FONT))

typedef struct _PangoFcFont      PangoFcFont;
typedef struct _PangoFcFontClass PangoFcFontClass;

#if defined(PANGO_ENABLE_ENGINE) || defined(PANGO_ENABLE_BACKEND)

/**
 * PANGO_RENDER_TYPE_FC:
 *
 * A string constant used to identify shape engines that work
 * with the fontconfig based backends. See the @engine_type field
 * of #PangoEngineInfo.
 **/
#define PANGO_RENDER_TYPE_FC "PangoRenderFc"

#ifdef PANGO_ENABLE_BACKEND

#define PANGO_FC_FONT_CLASS(klass)      (G_TYPE_CHECK_CLASS_CAST ((klass), PANGO_TYPE_FC_FONT, PangoFcFontClass))
#define PANGO_IS_FC_FONT_CLASS(klass)   (G_TYPE_CHECK_CLASS_TYPE ((klass), PANGO_TYPE_FC_FONT))
#define PANGO_FC_FONT_GET_CLASS(obj)    (G_TYPE_INSTANCE_GET_CLASS ((obj), PANGO_TYPE_FC_FONT, PangoFcFontClass))

/**
 * PangoFcFont:
 *
 * #PangoFcFont is a base class for font implementations
 * using the Fontconfig and FreeType libraries and is used in
 * conjunction with #PangoFcFontMap. When deriving from this
 * class, you need to implement all of its virtual functions
 * other than shutdown() along with the get_glyph_extents()
 * virtual function from #PangoFont.
 **/
struct _PangoFcFont
{
  PangoFont parent_instance;

  FcPattern *font_pattern;	    /* fully resolved pattern */
  PangoFontMap *fontmap;	    /* associated map */
  gpointer priv;		    /* used internally */
  PangoMatrix matrix;		    /* used internally */
  PangoFontDescription *description;

  GSList *metrics_by_lang;

  guint is_hinted : 1;
  guint is_transformed : 1;
};

/**
 * PangoFcFontClass:
 * @lock_face: Returns the FT_Face of the font and increases
 *  the reference count for the face by one.
 * @unlock_face: Decreases the reference count for the
 *  FT_Face of the font by one. When the count is zero,
 *  the #PangoFcFont subclass is allowed to free the
 *  FT_Face.
 * @has_char: Return %TRUE if the the font contains a glyph
 *   corresponding to the specified character.
 * @get_glyph: Gets the glyph that corresponds to the given
 *   Unicode character.
 * @get_unknown_glyph: (nullable): Gets the glyph that
 *   should be used to display an unknown-glyph indication
 *   for the specified Unicode character.  May be %NULL.
 * @shutdown: (nullable): Performs any font-specific
 *   shutdown code that needs to be done when
 *   pango_fc_font_map_shutdown is called.  May be %NULL.
 *
 * Class structure for #PangoFcFont.
 **/
struct _PangoFcFontClass
{
  /*< private >*/
  PangoFontClass parent_class;

  /*< public >*/
  FT_Face    (*lock_face)         (PangoFcFont      *font);
  void       (*unlock_face)       (PangoFcFont      *font);
  gboolean   (*has_char)          (PangoFcFont      *font,
				   gunichar          wc);
  guint      (*get_glyph)         (PangoFcFont      *font,
				   gunichar          wc);
  PangoGlyph (*get_unknown_glyph) (PangoFcFont      *font,
				   gunichar          wc);
  void       (*shutdown)          (PangoFcFont      *font);
  /*< private >*/

  /* Padding for future expansion */
  void (*_pango_reserved1) (void);
  void (*_pango_reserved2) (void);
  void (*_pango_reserved3) (void);
  void (*_pango_reserved4) (void);
};

#endif /* PANGO_ENABLE_BACKEND */

PANGO_AVAILABLE_IN_1_4
gboolean   pango_fc_font_has_char          (PangoFcFont      *font,
					    gunichar          wc);
PANGO_AVAILABLE_IN_1_4
guint      pango_fc_font_get_glyph         (PangoFcFont      *font,
					    gunichar          wc);
#ifndef PANGO_DISABLE_DEPRECATED
PANGO_DEPRECATED_FOR(PANGO_GET_UNKNOWN_GLYPH)
PangoGlyph pango_fc_font_get_unknown_glyph (PangoFcFont      *font,
					    gunichar          wc);
PANGO_DEPRECATED_IN_1_32
void       pango_fc_font_kern_glyphs       (PangoFcFont      *font,
					    PangoGlyphString *glyphs);
#endif /* PANGO_DISABLE_DEPRECATED */

#endif /* PANGO_ENABLE_ENGINE || PANGO_ENABLE_BACKEND */

PANGO_AVAILABLE_IN_ALL
GType      pango_fc_font_get_type (void) G_GNUC_CONST;

PANGO_AVAILABLE_IN_1_4
FT_Face    pango_fc_font_lock_face         (PangoFcFont      *font);
PANGO_AVAILABLE_IN_1_4
void       pango_fc_font_unlock_face       (PangoFcFont      *font);

G_END_DECLS
#endif /* __PANGO_FC_FONT_H__ */