summaryrefslogtreecommitdiff
path: root/pango/pango-ot.h
blob: 8b9d0a24f77874223f42d917b54cedaca1f4d80b (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
/* Pango
 * pango-ot.h:
 *
 * Copyright (C) 2000,2007 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_OT_H__
#define __PANGO_OT_H__

#include <pango/pangofc-font.h>
#include <pango/pango-glyph.h>
#include <pango/pango-font.h>
#include <pango/pango-script.h>
#include <pango/pango-language.h>

G_BEGIN_DECLS

#ifdef PANGO_ENABLE_ENGINE

typedef guint32 PangoOTTag;

#define PANGO_OT_TAG_MAKE(c1,c2,c3,c4)		((PangoOTTag) FT_MAKE_TAG (c1, c2, c3, c4))
#define PANGO_OT_TAG_MAKE_FROM_STRING(s)	(PANGO_OT_TAG_MAKE(((const char *) s)[0], \
								   ((const char *) s)[1], \
								   ((const char *) s)[2], \
								   ((const char *) s)[3]))

typedef struct _PangoOTInfo       PangoOTInfo;
typedef struct _PangoOTBuffer     PangoOTBuffer;
typedef struct _PangoOTGlyph      PangoOTGlyph;
typedef struct _PangoOTRuleset    PangoOTRuleset;
typedef struct _PangoOTFeatureMap PangoOTFeatureMap;
typedef struct _PangoOTRulesetDescription PangoOTRulesetDescription;

typedef enum
{
  PANGO_OT_TABLE_GSUB,
  PANGO_OT_TABLE_GPOS
} PangoOTTableType;

#define PANGO_OT_ALL_GLYPHS			((guint) 0xFFFF)
#define PANGO_OT_NO_FEATURE			((guint) 0xFFFF)
#define PANGO_OT_NO_SCRIPT			((guint) 0xFFFF)
#define PANGO_OT_DEFAULT_LANGUAGE		((guint) 0xFFFF)

#define PANGO_OT_TAG_DEFAULT_SCRIPT		PANGO_OT_TAG_MAKE ('D', 'F', 'L', 'T')
#define PANGO_OT_TAG_DEFAULT_LANGUAGE		PANGO_OT_TAG_MAKE ('d', 'f', 'l', 't')

/* Note that this must match hb_glyph_info_t */
struct _PangoOTGlyph
{
  guint    glyph;
  guint    properties;
  guint    cluster;
  gushort  component;
  gushort  ligID;
  gushort  property_cache;    /* Internal */
};

struct _PangoOTFeatureMap
{
  char     feature_name[5];
  gulong   property_bit;
};

struct _PangoOTRulesetDescription {
  PangoScript               script;
  PangoLanguage            *language;
  const PangoOTFeatureMap  *static_gsub_features;
  guint                   n_static_gsub_features;
  const PangoOTFeatureMap  *static_gpos_features;
  guint                   n_static_gpos_features;
  const PangoOTFeatureMap  *other_features;
  guint                   n_other_features;
};


#define PANGO_TYPE_OT_INFO              (pango_ot_info_get_type ())
#define PANGO_OT_INFO(object)           (G_TYPE_CHECK_INSTANCE_CAST ((object), PANGO_TYPE_OT_INFO, PangoOTInfo))
#define PANGO_IS_OT_INFO(object)        (G_TYPE_CHECK_INSTANCE_TYPE ((object), PANGO_TYPE_OT_INFO))
GType pango_ot_info_get_type (void) G_GNUC_CONST;

#define PANGO_TYPE_OT_RULESET           (pango_ot_ruleset_get_type ())
#define PANGO_OT_RULESET(object)        (G_TYPE_CHECK_INSTANCE_CAST ((object), PANGO_TYPE_OT_RULESET, PangoOTRuleset))
#define PANGO_IS_OT_RULESET(object)     (G_TYPE_CHECK_INSTANCE_TYPE ((object), PANGO_TYPE_OT_RULESET))
GType pango_ot_ruleset_get_type (void) G_GNUC_CONST;


PangoOTInfo *pango_ot_info_get (FT_Face face);

gboolean pango_ot_info_find_script   (PangoOTInfo      *info,
				      PangoOTTableType  table_type,
				      PangoOTTag        script_tag,
				      guint            *script_index);
gboolean pango_ot_info_find_language (PangoOTInfo      *info,
				      PangoOTTableType  table_type,
				      guint             script_index,
				      PangoOTTag        language_tag,
				      guint            *language_index,
				      guint            *required_feature_index);
gboolean pango_ot_info_find_feature  (PangoOTInfo      *info,
				      PangoOTTableType  table_type,
				      PangoOTTag        feature_tag,
				      guint             script_index,
				      guint             language_index,
				      guint            *feature_index);

PangoOTTag *pango_ot_info_list_scripts   (PangoOTInfo      *info,
					  PangoOTTableType  table_type);
PangoOTTag *pango_ot_info_list_languages (PangoOTInfo      *info,
					  PangoOTTableType  table_type,
					  guint             script_index,
					  PangoOTTag        language_tag);
PangoOTTag *pango_ot_info_list_features  (PangoOTInfo      *info,
					  PangoOTTableType  table_type,
					  PangoOTTag        tag,
					  guint             script_index,
					  guint             language_index);

PangoOTBuffer *pango_ot_buffer_new        (PangoFcFont       *font);
void           pango_ot_buffer_destroy    (PangoOTBuffer     *buffer);
void           pango_ot_buffer_clear      (PangoOTBuffer     *buffer);
void           pango_ot_buffer_set_rtl    (PangoOTBuffer     *buffer,
					   gboolean           rtl);
void           pango_ot_buffer_add_glyph  (PangoOTBuffer     *buffer,
					   guint              glyph,
					   guint              properties,
					   guint              cluster);
void           pango_ot_buffer_get_glyphs (const PangoOTBuffer  *buffer,
					   PangoOTGlyph        **glyphs,
					   int                  *n_glyphs);
void           pango_ot_buffer_output     (const PangoOTBuffer  *buffer,
					   PangoGlyphString     *glyphs);

void           pango_ot_buffer_set_zero_width_marks (PangoOTBuffer     *buffer,
						     gboolean           zero_width_marks);

const PangoOTRuleset *pango_ot_ruleset_get_for_description (PangoOTInfo                     *info,
							    const PangoOTRulesetDescription *desc);
PangoOTRuleset *pango_ot_ruleset_new (PangoOTInfo       *info);
PangoOTRuleset *pango_ot_ruleset_new_for (PangoOTInfo       *info,
					  PangoScript        script,
					  PangoLanguage     *language);
PangoOTRuleset *pango_ot_ruleset_new_from_description (PangoOTInfo                     *info,
						       const PangoOTRulesetDescription *desc);
void            pango_ot_ruleset_add_feature (PangoOTRuleset   *ruleset,
					      PangoOTTableType  table_type,
					      guint             feature_index,
					      gulong            property_bit);
gboolean        pango_ot_ruleset_maybe_add_feature (PangoOTRuleset   *ruleset,
						    PangoOTTableType  table_type,
						    PangoOTTag        feature_tag,
						    gulong            property_bit);
guint           pango_ot_ruleset_maybe_add_features (PangoOTRuleset          *ruleset,
						     PangoOTTableType         table_type,
						     const PangoOTFeatureMap *features,
						     guint                    n_features);
guint           pango_ot_ruleset_get_feature_count (const PangoOTRuleset   *ruleset,
						    guint                  *n_gsub_features,
						    guint                  *n_gpos_features);
void            pango_ot_ruleset_substitute  (const PangoOTRuleset   *ruleset,
					      PangoOTBuffer          *buffer);
void            pango_ot_ruleset_position    (const PangoOTRuleset   *ruleset,
					      PangoOTBuffer          *buffer);
PangoScript     pango_ot_tag_to_script     (PangoOTTag     script_tag) G_GNUC_CONST;
PangoOTTag      pango_ot_tag_from_script   (PangoScript    script) G_GNUC_CONST;
PangoLanguage  *pango_ot_tag_to_language   (PangoOTTag     language_tag) G_GNUC_CONST;
PangoOTTag      pango_ot_tag_from_language (PangoLanguage *language) G_GNUC_CONST;

guint           pango_ot_ruleset_description_hash  (const PangoOTRulesetDescription *desc) G_GNUC_PURE;
gboolean        pango_ot_ruleset_description_equal (const PangoOTRulesetDescription *desc1,
						    const PangoOTRulesetDescription *desc2) G_GNUC_PURE;
PangoOTRulesetDescription *pango_ot_ruleset_description_copy  (const PangoOTRulesetDescription *desc);
void            pango_ot_ruleset_description_free  (PangoOTRulesetDescription       *desc);


#endif /* PANGO_ENABLE_ENGINE */

G_END_DECLS

#endif /* __PANGO_OT_H__ */