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
|
/* Pango
* pangofc-fontmap.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_MAP_H__
#define __PANGO_FC_FONT_MAP_H__
#include <fontconfig/fontconfig.h>
#include <pango/pango-fontmap.h>
#include <pango/pangofc-decoder.h>
#include <pango/pangofc-font.h>
G_BEGIN_DECLS
#define PANGO_TYPE_FC_FONT_MAP (pango_fc_font_map_get_type ())
#define PANGO_FC_FONT_MAP(object) (G_TYPE_CHECK_INSTANCE_CAST ((object), PANGO_TYPE_FC_FONT_MAP, PangoFcFontMap))
#define PANGO_IS_FC_FONT_MAP(object) (G_TYPE_CHECK_INSTANCE_TYPE ((object), PANGO_TYPE_FC_FONT_MAP))
typedef struct _PangoFcFontMap PangoFcFontMap;
typedef struct _PangoFcFontMapClass PangoFcFontMapClass;
typedef struct _PangoFcFontMapPrivate PangoFcFontMapPrivate;
#ifdef PANGO_ENABLE_BACKEND
#define PANGO_FC_FONT_MAP_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), PANGO_TYPE_FC_FONT_MAP, PangoFcFontMapClass))
#define PANGO_IS_FC_FONT_MAP_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), PANGO_TYPE_FC_FONT_MAP))
#define PANGO_FC_FONT_MAP_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), PANGO_TYPE_FC_FONT_MAP, PangoFcFontMapClass))
/**
* PangoFcFontMap:
*
* #PangoFcFontMap is a base class for font map implementations
* using the Fontconfig and FreeType libraries. To create a new
* backend using Fontconfig and FreeType, you derive from this class
* and implement a new_font() virtual function that creates an
* instance deriving from #PangoFcFont.
**/
struct _PangoFcFontMap
{
PangoFontMap parent_instance;
PangoFcFontMapPrivate *priv;
};
/**
* PangoFcFontMapClass:
* @default_substitute: Substitutes in default values for
* unspecified fields in a #FcPattern. This will be called
* prior to creating a font for the pattern. May be %NULL.
* Deprecated in favor of @context_substitute().
* @new_font: Creates a new #PangoFcFont for the specified
* pattern of the appropriate type for this font map. The
* @pattern argument must be passed to the "pattern" property
* of #PangoFcFont when you call g_object_new(). Deprecated
* in favor of @create_font().
* @get_resolution: Gets the resolution (the scale factor
* between logical and absolute font sizes) that the backend
* will use for a particular fontmap and context. @context
* may be null.
* @context_key_get: Gets an opaque key holding backend
* specific options for the context that will affect
* fonts created by create_font(). The result must point to
* persistant storage owned by the fontmap. This key
* is used to index hash tables used to look up fontsets
* and fonts.
* @context_key_copy: Copies a context key. Pango uses this
* to make a persistant copy of the value returned from
* @context_key_get.
* @context_key_free: Frees a context key copied with
* @context_key_copy.
* @context_key_hash: Gets a hash value for a context key
* @context_key_equal: Compares two context keys for equality.
* @create_font: Creates a new #PangoFcFont for the specified
* pattern of the appropriate type for this font map using
* information from the context that is passed in. The
* @pattern argument must be passed to the "pattern" property
* of #PangoFcFont when you call g_object_new(). Deprecated
* in favor of @create_font(). If %NULL, new_font() is used.
* @context_substitute: Substitutes in default values for
* unspecified fields in a #FcPattern. This will be called
* prior to creating a font for the pattern. May be %NULL.
*
* Class structure for #PangoFcFontMap.
**/
struct _PangoFcFontMapClass
{
/*< private >*/
PangoFontMapClass parent_class;
/*< public >*/
/* Deprecated in favor of context_substitute */
void (*default_substitute) (PangoFcFontMap *fontmap,
FcPattern *pattern);
/* Deprecated in favor of create_font */
PangoFcFont *(*new_font) (PangoFcFontMap *fontmap,
FcPattern *pattern);
double (*get_resolution) (PangoFcFontMap *fcfontmap,
PangoContext *context);
gconstpointer (*context_key_get) (PangoFcFontMap *fcfontmap,
PangoContext *context);
gpointer (*context_key_copy) (PangoFcFontMap *fcfontmap,
gconstpointer key);
void (*context_key_free) (PangoFcFontMap *fcfontmap,
gpointer key);
guint32 (*context_key_hash) (PangoFcFontMap *fcfontmap,
gconstpointer key);
gboolean (*context_key_equal) (PangoFcFontMap *fcfontmap,
gconstpointer key_a,
gconstpointer key_b);
void (*context_substitute) (PangoFcFontMap *fontmap,
PangoContext *context,
FcPattern *pattern);
PangoFcFont *(*create_font) (PangoFcFontMap *fontmap,
PangoContext *context,
const PangoFontDescription *desc,
FcPattern *pattern);
/*< private >*/
/* Padding for future expansion */
void (*_pango_reserved1) (void);
void (*_pango_reserved2) (void);
void (*_pango_reserved3) (void);
void (*_pango_reserved4) (void);
};
PangoContext * pango_fc_font_map_create_context (PangoFcFontMap *fcfontmap);
void pango_fc_font_map_cache_clear (PangoFcFontMap *fcfontmap);
void pango_fc_font_map_shutdown (PangoFcFontMap *fcfontmap);
#endif
GType pango_fc_font_map_get_type (void);
/**
* PangoFcDecoderFindFunc:
* @pattern: a fully resolved #FcPattern specifying the font on the system
* @user_data: user data passed to pango_fc_font_map_add_decoder_find_func()
*
* Callback function passed to pango_fc_font_map_add_decoder_find_func().
*
* Return value: a new reference to a custom decoder for this pattern,
* or %NULL if the default decoder handling should be used.
**/
typedef PangoFcDecoder * (*PangoFcDecoderFindFunc) (FcPattern *pattern,
gpointer user_data);
void pango_fc_font_map_add_decoder_find_func (PangoFcFontMap *fcfontmap,
PangoFcDecoderFindFunc findfunc,
gpointer user_data,
GDestroyNotify dnotify);
PangoFontDescription *pango_fc_font_description_from_pattern (FcPattern *pattern,
gboolean include_size);
G_END_DECLS
#endif /* __PANGO_FC_FONT_MAP_H__ */
|
