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1 | /*************************************************************************** |
2 | * | |
3 | * Copyright (C) 1998-2002, International Business Machines | |
4 | * Corporation and others. All Rights Reserved. | |
5 | * | |
6 | ************************************************************************/ | |
7 | ||
8 | ||
9 | #ifndef __FONTOBJECT_H | |
10 | #define __FONTOBJECT_H | |
11 | ||
12 | #include <stdio.h> | |
13 | ||
14 | #include "LETypes.h" | |
15 | ||
16 | ||
17 | #ifndef ANY_NUMBER | |
18 | #define ANY_NUMBER 1 | |
19 | #endif | |
20 | ||
21 | struct DirectoryEntry | |
22 | { | |
23 | le_uint32 tag; | |
24 | le_uint32 checksum; | |
25 | le_uint32 offset; | |
26 | le_uint32 length; | |
27 | }; | |
28 | ||
29 | struct SFNTDirectory | |
30 | { | |
31 | le_uint32 scalerType; | |
32 | le_uint16 numTables; | |
33 | le_uint16 searchRange; | |
34 | le_uint16 entrySelector; | |
35 | le_uint16 rangeShift; | |
36 | DirectoryEntry tableDirectory[ANY_NUMBER]; | |
37 | }; | |
38 | ||
39 | ||
40 | struct CMAPEncodingSubtableHeader | |
41 | { | |
42 | le_uint16 platformID; | |
43 | le_uint16 platformSpecificID; | |
44 | le_uint32 encodingOffset; | |
45 | }; | |
46 | ||
47 | struct CMAPTable | |
48 | { | |
49 | le_uint16 version; | |
50 | le_uint16 numberSubtables; | |
51 | CMAPEncodingSubtableHeader encodingSubtableHeaders[ANY_NUMBER]; | |
52 | }; | |
53 | ||
54 | struct CMAPEncodingSubtable | |
55 | { | |
56 | le_uint16 format; | |
57 | le_uint16 length; | |
58 | le_uint16 language; | |
59 | }; | |
60 | ||
61 | struct CMAPFormat0Encoding : CMAPEncodingSubtable | |
62 | { | |
63 | le_uint8 glyphIndexArray[256]; | |
64 | }; | |
65 | ||
66 | struct CMAPFormat2Subheader | |
67 | { | |
68 | le_uint16 firstCode; | |
69 | le_uint16 entryCount; | |
70 | le_int16 idDelta; | |
71 | le_uint16 idRangeOffset; | |
72 | }; | |
73 | ||
74 | struct CMAPFormat2Encoding : CMAPEncodingSubtable | |
75 | { | |
76 | le_uint16 subHeadKeys[256]; | |
77 | CMAPFormat2Subheader subheaders[ANY_NUMBER]; | |
78 | }; | |
79 | ||
80 | struct CMAPFormat4Encoding : CMAPEncodingSubtable | |
81 | { | |
82 | le_uint16 segCountX2; | |
83 | le_uint16 searchRange; | |
84 | le_uint16 entrySelector; | |
85 | le_uint16 rangeShift; | |
86 | le_uint16 endCodes[ANY_NUMBER]; | |
87 | // le_uint16 reservedPad; | |
88 | // le_uint16 startCodes[ANY_NUMBER]; | |
89 | // le_uint16 idDelta[ANY_NUMBER]; | |
90 | // le_uint16 idRangeOffset[ANY_NUMBER]; | |
91 | // le_uint16 glyphIndexArray[ANY_NUMBER]; | |
92 | }; | |
93 | ||
94 | struct CMAPFormat6Encoding : CMAPEncodingSubtable | |
95 | { | |
96 | le_uint16 firstCode; | |
97 | le_uint16 entryCount; | |
98 | le_uint16 glyphIndexArray[ANY_NUMBER]; | |
99 | }; | |
100 | ||
101 | typedef le_int32 fixed; | |
102 | ||
103 | struct BigDate | |
104 | { | |
105 | le_uint32 bc; | |
106 | le_uint32 ad; | |
107 | }; | |
108 | ||
109 | struct HEADTable | |
110 | { | |
111 | fixed version; | |
112 | fixed fontRevision; | |
113 | le_uint32 checksumAdjustment; | |
114 | le_uint32 magicNumber; | |
115 | le_uint16 flags; | |
116 | le_uint16 unitsPerEm; | |
117 | BigDate created; | |
118 | BigDate modified; | |
119 | le_int16 xMin; | |
120 | le_int16 yMin; | |
121 | le_int16 xMax; | |
122 | le_int16 yMax; | |
123 | le_int16 lowestRecPPEM; | |
124 | le_int16 fontDirectionHint; | |
125 | le_int16 indexToLocFormat; | |
126 | le_int16 glyphDataFormat; | |
127 | }; | |
128 | ||
129 | struct MAXPTable | |
130 | { | |
131 | fixed version; | |
132 | le_uint16 numGlyphs; | |
133 | le_uint16 maxPoints; | |
134 | le_uint16 maxContours; | |
135 | le_uint16 maxComponentPoints; | |
136 | le_uint16 maxComponentContours; | |
137 | le_uint16 maxZones; | |
138 | le_uint16 maxTwilightPoints; | |
139 | le_uint16 maxStorage; | |
140 | le_uint16 maxFunctionDefs; | |
141 | le_uint16 maxInstructionDefs; | |
142 | le_uint16 maxStackElements; | |
143 | le_uint16 maxSizeOfInstructions; | |
144 | le_uint16 maxComponentElements; | |
145 | le_uint16 maxComponentDepth; | |
146 | }; | |
147 | ||
148 | struct HHEATable | |
149 | { | |
150 | fixed version; | |
151 | le_int16 ascent; | |
152 | le_int16 descent; | |
153 | le_int16 lineGap; | |
154 | le_uint16 advanceWidthMax; | |
155 | le_int16 minLeftSideBearing; | |
156 | le_int16 minRightSideBearing; | |
157 | le_int16 xMaxExtent; | |
158 | le_int16 caretSlopeRise; | |
159 | le_int16 caretSlopeRun; | |
160 | le_int16 caretOffset; | |
161 | le_int16 reserved1; | |
162 | le_int16 reserved2; | |
163 | le_int16 reserved3; | |
164 | le_int16 reserved4; | |
165 | le_int16 metricDataFormat; | |
166 | le_uint16 numOfLongHorMetrics; | |
167 | }; | |
168 | ||
169 | struct LongHorMetric | |
170 | { | |
171 | le_uint16 advanceWidth; | |
172 | le_int16 leftSideBearing; | |
173 | }; | |
174 | ||
175 | struct HMTXTable | |
176 | { | |
177 | LongHorMetric hMetrics[ANY_NUMBER]; // ANY_NUMBER = numOfLongHorMetrics from hhea table | |
178 | // le_int16 leftSideBearing[ANY_NUMBER]; // ANY_NUMBER = numGlyphs - numOfLongHorMetrics | |
179 | }; | |
180 | ||
181 | class FontObject | |
182 | { | |
183 | public: | |
184 | FontObject(char *fontName); | |
185 | ~FontObject(); | |
186 | ||
187 | void *readTable(LETag tag, le_uint32 *length); | |
188 | void deleteTable(void *table); | |
189 | ||
190 | LEGlyphID unicodeToGlyph(LEUnicode32 unicode); | |
191 | ||
192 | #if 0 | |
193 | le_uint32 unicodesToGlyphs(LEUnicode *chars, le_uint32 nChars, LEGlyphID *glyphs, | |
194 | le_uint32 *charIndices, le_bool rightToLeft); | |
195 | #endif | |
196 | ||
197 | le_uint16 getUnitsPerEM(); | |
198 | ||
199 | le_uint16 getGlyphAdvance(LEGlyphID glyph); | |
200 | ||
201 | private: | |
202 | FontObject(); | |
203 | ||
204 | DirectoryEntry *findTable(LETag tag); | |
205 | CMAPEncodingSubtable *findCMAP(le_uint16 platformID, le_uint16 platformSpecificID); | |
206 | void initUnicodeCMAP(); | |
207 | ||
208 | SFNTDirectory *directory; | |
209 | le_uint16 numTables; | |
210 | le_uint16 searchRange; | |
211 | le_uint16 entrySelector; | |
212 | le_uint16 rangeShift; | |
213 | ||
214 | CMAPTable *cmapTable; | |
215 | le_uint16 cmSegCount; | |
216 | le_uint16 cmSearchRange; | |
217 | le_uint16 cmEntrySelector; | |
218 | le_uint16 cmRangeShift; | |
219 | le_uint16 *cmEndCodes; | |
220 | le_uint16 *cmStartCodes; | |
221 | le_uint16 *cmIdDelta; | |
222 | le_uint16 *cmIdRangeOffset; | |
223 | ||
224 | HEADTable *headTable; | |
225 | ||
226 | HMTXTable *hmtxTable; | |
227 | le_uint16 numGlyphs; | |
228 | le_uint16 numOfLongHorMetrics; | |
229 | ||
230 | FILE *file; | |
231 | ||
232 | }; | |
233 | ||
234 | #endif | |
235 |