summaryrefslogtreecommitdiff
path: root/pango/pangofc-fontmap.h
blob: 8421f180e7a8b9cc2f312fb2ad526783a648e94d (plain)
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
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
/* 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


#ifdef PANGO_ENABLE_BACKEND

/**
 * PangoFcFontsetKey:
 *
 * An opaque structure containing all the information needed for
 * loading a fontset with the PangoFc fontmap.
 *
 * Since: 1.24
 **/
typedef struct _PangoFcFontsetKey  PangoFcFontsetKey;

PangoLanguage              *pango_fc_fontset_key_get_language      (const PangoFcFontsetKey *key);
const PangoFontDescription *pango_fc_fontset_key_get_description   (const PangoFcFontsetKey *key);
const PangoMatrix          *pango_fc_fontset_key_get_matrix        (const PangoFcFontsetKey *key);
double                      pango_fc_fontset_key_get_absolute_size (const PangoFcFontsetKey *key);
double                      pango_fc_fontset_key_get_resolution    (const PangoFcFontsetKey *key);
gpointer                    pango_fc_fontset_key_get_context_key   (const PangoFcFontsetKey *key);

/**
 * PangoFcFontKey:
 *
 * An opaque structure containing all the information needed for
 * loading a font with the PangoFc fontmap.
 *
 * Since: 1.24
 **/
typedef struct _PangoFcFontKey     PangoFcFontKey;

const FcPattern   *pango_fc_font_key_get_pattern     (const PangoFcFontKey *key);
const PangoMatrix *pango_fc_font_key_get_matrix      (const PangoFcFontKey *key);
gpointer           pango_fc_font_key_get_context_key (const PangoFcFontKey *key);

#endif


/*
 * PangoFcFontMap
 */

#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 @font_key_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.
 * @fontset_key_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.
 *  (Since: 1.24)
 * @create_font: Creates a new #PangoFcFont for the specified
 *  pattern of the appropriate type for this font map using
 *  information from the font key that is passed in. The
 *  @pattern member of @font_key can be retrieved using
 *  pango_fc_font_key_get_pattern() and must be passed to
 *  the "pattern" property of #PangoFcFont when you call
 *  g_object_new().  If %NULL, new_font() is used.
 *  (Since: 1.24)
 *
 * Class structure for #PangoFcFontMap.
 **/
struct _PangoFcFontMapClass
{
  /*< private >*/
  PangoFontMapClass parent_class;

  /*< public >*/
  /* Deprecated in favor of fontset_key_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         (*fontset_key_substitute)(PangoFcFontMap             *fontmap,
				      PangoFcFontsetKey          *fontsetkey,
				      FcPattern                  *pattern);
  PangoFcFont  *(*create_font)       (PangoFcFontMap             *fontmap,
				      PangoFcFontKey             *fontkey);
  /*< private >*/

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

#ifndef PANGO_DISABLE_DEPRECATED
G_DEPRECATED_FOR(pango_font_map_create_context)
PangoContext * pango_fc_font_map_create_context (PangoFcFontMap *fcfontmap);
#endif
void           pango_fc_font_map_shutdown       (PangoFcFontMap *fcfontmap);

#endif

GType pango_fc_font_map_get_type (void) G_GNUC_CONST;

void           pango_fc_font_map_cache_clear    (PangoFcFontMap *fcfontmap);

/**
 * 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);
PangoFcDecoder *pango_fc_font_map_find_decoder (PangoFcFontMap *fcfontmap,
					        FcPattern      *pattern);

PangoFontDescription *pango_fc_font_description_from_pattern (FcPattern *pattern,
							      gboolean   include_size);

/**
 * PANGO_FC_GRAVITY:
 *
 * String representing a fontconfig property name that Pango sets on any
 * fontconfig pattern it passes to fontconfig if a #PangoGravity other
 * than %PangoGravitySouth is desired.
 *
 * The property will have a #PangoGravity value as a string, like "east".
 * This can be used to write fontconfig configuration rules to choose
 * different fonts for horizontal and vertical writing directions.
 *
 * Since: 1.20
 */
#define PANGO_FC_GRAVITY "pangogravity"

/**
 * PANGO_FC_VERSION:
 *
 * String representing a fontconfig property name that Pango sets on any
 * fontconfig pattern it passes to fontconfig.
 *
 * The property will have an integer value equal to what
 * pango_version() returns.
 * This can be used to write fontconfig configuration rules that only affect
 * certain pango versions (or only pango-using applications, or only
 * non-pango-using applications).
 *
 * Since: 1.20
 */
#define PANGO_FC_VERSION "pangoversion"

/**
 * PANGO_FC_PRGNAME:
 *
 * String representing a fontconfig property name that Pango sets on any
 * fontconfig pattern it passes to fontconfig.
 *
 * The property will have a string equal to what
 * g_get_prgname() returns.
 * This can be used to write fontconfig configuration rules that only affect
 * certain applications.
 *
 * This is equivalent to FC_PRGNAME in versions of fontconfig that have that.
 *
 * Since: 1.24
 */
#define PANGO_FC_PRGNAME "prgname"

/**
 * PANGO_FC_FONT_FEATURES:
 *
 * String representing a fontconfig property name that Pango reads from font
 * patterns to populate list of OpenType features to be enabled for the font
 * by default.
 *
 * The property will have a number of string elements, each of which is the
 * OpenType feature tag of one feature to enable.
 *
 * This is equivalent to FC_FONT_FEATURES in versions of fontconfig that have that.
 *
 * Since: 1.34
 */
#define PANGO_FC_FONT_FEATURES "fontfeatures"

G_END_DECLS

#endif /* __PANGO_FC_FONT_MAP_H__ */