Line data Source code
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
94 : unsigned int error() const { return m_error; }
95 0 : bool error(Error e) { m_error = e.error(); return false; }
96 0 : unsigned int error_context() const { return m_error; }
97 0 : void error_context(unsigned int errcntxt) { m_errcntxt = errcntxt; }
98 :
99 0 : 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
126 0 : const SillMap & Face::theSill() const
127 : {
128 0 : return m_Sill;
129 : }
130 :
131 : inline
132 0 : uint16 Face::numFeatures() const
133 : {
134 0 : return m_Sill.theFeatureMap().numFeats();
135 : }
136 :
137 : inline
138 0 : const FeatureRef * Face::featureById(uint32 id) const
139 : {
140 0 : return m_Sill.theFeatureMap().findFeatureRef(id);
141 : }
142 :
143 : inline
144 0 : const FeatureRef *Face::feature(uint16 index) const
145 : {
146 0 : return m_Sill.theFeatureMap().feature(index);
147 : }
148 :
149 : inline
150 0 : const GlyphCache & Face::glyphs() const
151 : {
152 0 : return *m_pGlyphFaceCache;
153 : }
154 :
155 : inline
156 0 : Cmap & Face::cmap() const
157 : {
158 0 : return *m_cmap;
159 : };
160 :
161 : inline
162 0 : json * Face::logger() const throw()
163 : {
164 0 : return m_logger;
165 : }
166 :
167 :
168 :
169 : class Face::Table
170 : {
171 : const Face * _f;
172 : mutable const byte * _p;
173 : uint32 _sz;
174 : bool _compressed;
175 :
176 : Error decompress();
177 :
178 : void releaseBuffers();
179 :
180 : public:
181 : Table() throw();
182 : Table(const Face & face, const Tag n, uint32 version=0xffffffff) throw();
183 : Table(const Table & rhs) throw();
184 : ~Table() throw();
185 :
186 : operator const byte * () const throw();
187 :
188 : Table & operator = (const Table & rhs) throw();
189 : size_t size() const throw();
190 : };
191 :
192 : inline
193 0 : Face::Table::Table() throw()
194 0 : : _f(0), _p(0), _sz(0), _compressed(false)
195 : {
196 0 : }
197 :
198 : inline
199 0 : Face::Table::Table(const Table & rhs) throw()
200 0 : : _f(rhs._f), _p(rhs._p), _sz(rhs._sz), _compressed(rhs._compressed)
201 : {
202 0 : rhs._p = 0;
203 0 : }
204 :
205 : inline
206 0 : Face::Table::~Table() throw()
207 : {
208 0 : releaseBuffers();
209 0 : }
210 :
211 : inline
212 0 : Face::Table::operator const byte * () const throw()
213 : {
214 0 : return _p;
215 : }
216 :
217 : inline
218 0 : size_t Face::Table::size() const throw()
219 : {
220 0 : return _sz;
221 : }
222 :
223 : } // namespace graphite2
224 :
225 : struct gr_face : public graphite2::Face {};
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