1 /* GRAPHITE2 LICENSING
2
3 Copyright 2010, SIL International
4 All rights reserved.
5
6 This library is free software; you can redistribute it and/or modify
7 it under the terms of the GNU Lesser General Public License as published
8 by the Free Software Foundation; either version 2.1 of License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should also have received a copy of the GNU Lesser General Public
17 License along with this library in the file named "LICENSE".
18 If not, write to the Free Software Foundation, 51 Franklin Street,
19 Suite 500, Boston, MA 02110-1335, USA or visit their web page on the
20 internet at http://www.fsf.org/licenses/lgpl.html.
21
22 Alternatively, the contents of this file may be used under the terms of the
23 Mozilla Public License (http://mozilla.org/MPL) or the GNU General Public
24 License, as published by the Free Software Foundation, either version 2
25 of the License or (at your option) any later version.
26 */
27 #pragma once
28
29 #include <cstdio>
30
31 #include "graphite2/Font.h"
32
33 #include "inc/Main.h"
34 #include "inc/FeatureMap.h"
35 #include "inc/TtfUtil.h"
36 #include "inc/Silf.h"
37 #include "inc/Error.h"
38
39 namespace graphite2 {
40
41 class Cmap;
42 class FileFace;
43 class GlyphCache;
44 class NameTable;
45 class json;
46 class Font;
47
48
49 using TtfUtil::Tag;
50
51 // These are the actual tags, as distinct from the consecutive IDs in TtfUtil.h
52
53 class Face
54 {
55 // Prevent any kind of copying
56 Face(const Face&);
57 Face& operator=(const Face&);
58
59 public:
60 class Table;
61 static float default_glyph_advance(const void* face_ptr, gr_uint16 glyphid);
62
63 Face(const void* appFaceHandle/*non-NULL*/, const gr_face_ops & ops);
64 virtual ~Face();
65
66 virtual bool runGraphite(Segment *seg, const Silf *silf) const;
67
68 public:
69 bool readGlyphs(uint32 faceOptions);
70 bool readGraphite(const Table & silf);
71 bool readFeatures();
72 void takeFileFace(FileFace* pFileFace/*takes ownership*/);
73
74 const SillMap & theSill() const;
75 const GlyphCache & glyphs() const;
76 Cmap & cmap() const;
77 NameTable * nameTable() const;
78 void setLogger(FILE *log_file);
79 json * logger() const throw();
80
81 const Silf * chooseSilf(uint32 script) const;
82 uint16 languageForLocale(const char * locale) const;
83
84 // Features
85 uint16 numFeatures() const;
86 const FeatureRef * featureById(uint32 id) const;
87 const FeatureRef * feature(uint16 index) const;
88
89 // Glyph related
90 int32 getGlyphMetric(uint16 gid, uint8 metric) const;
91 uint16 findPseudo(uint32 uid) const;
92
93 // Errors
error()94 unsigned int error() const { return m_error; }
error(Error e)95 bool error(Error e) { m_error = e.error(); return false; }
error_context()96 unsigned int error_context() const { return m_error; }
error_context(unsigned int errcntxt)97 void error_context(unsigned int errcntxt) { m_errcntxt = errcntxt; }
98
99 CLASS_NEW_DELETE;
100 private:
101 SillMap m_Sill;
102 gr_face_ops m_ops;
103 const void * m_appFaceHandle; // non-NULL
104 FileFace * m_pFileFace; //owned
105 mutable GlyphCache * m_pGlyphFaceCache; // owned - never NULL
106 mutable Cmap * m_cmap; // cmap cache if available
107 mutable NameTable * m_pNames;
108 mutable json * m_logger;
109 unsigned int m_error;
110 unsigned int m_errcntxt;
111 protected:
112 Silf * m_silfs; // silf subtables.
113 uint16 m_numSilf; // num silf subtables in the silf table
114 private:
115 uint16 m_ascent,
116 m_descent;
117 #ifdef GRAPHITE2_TELEMETRY
118 public:
119 mutable telemetry tele;
120 #endif
121 };
122
123
124
125 inline
theSill()126 const SillMap & Face::theSill() const
127 {
128 return m_Sill;
129 }
130
131 inline
numFeatures()132 uint16 Face::numFeatures() const
133 {
134 return m_Sill.theFeatureMap().numFeats();
135 }
136
137 inline
featureById(uint32 id)138 const FeatureRef * Face::featureById(uint32 id) const
139 {
140 return m_Sill.theFeatureMap().findFeatureRef(id);
141 }
142
143 inline
feature(uint16 index)144 const FeatureRef *Face::feature(uint16 index) const
145 {
146 return m_Sill.theFeatureMap().feature(index);
147 }
148
149 inline
glyphs()150 const GlyphCache & Face::glyphs() const
151 {
152 return *m_pGlyphFaceCache;
153 }
154
155 inline
cmap()156 Cmap & Face::cmap() const
157 {
158 return *m_cmap;
159 };
160
161 inline
logger()162 json * Face::logger() const throw()
163 {
164 return m_logger;
165 }
166
167
168
169 class Face::Table
170 {
171 const Face * _f;
172 mutable const byte * _p;
173 size_t _sz;
174 bool _compressed;
175
176 Error decompress();
177
178 void release();
179
180 public:
181 Table() throw();
182 Table(const Face & face, const Tag n, uint32 version=0xffffffff) throw();
183 ~Table() throw();
184 Table(const Table && rhs) throw();
185
186 operator const byte * () const throw();
187
188 size_t size() const throw();
189 Table & operator = (const Table && rhs) throw();
190 };
191
192 inline
Table()193 Face::Table::Table() throw()
194 : _f(0), _p(0), _sz(0), _compressed(false)
195 {
196 }
197
198 inline
Table(const Table && rhs)199 Face::Table::Table(const Table && rhs) throw()
200 : _f(rhs._f), _p(rhs._p), _sz(rhs._sz), _compressed(rhs._compressed)
201 {
202 rhs._p = 0;
203 }
204
205 inline
~Table()206 Face::Table::~Table() throw()
207 {
208 release();
209 }
210
211 inline
throw()212 Face::Table::operator const byte * () const throw()
213 {
214 return _p;
215 }
216
217 inline
size()218 size_t Face::Table::size() const throw()
219 {
220 return _sz;
221 }
222
223 } // namespace graphite2
224
225 struct gr_face : public graphite2::Face {};
226