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Commit	Line	Data
f3c0d7a5 A	1	// © 2016 and later: Unicode, Inc. and others.
f3c0d7a5 A	2	// License & terms of use: http://www.unicode.org/copyright.html
b75a7d8f A	3	/***************************************************************************
	4	*
	5	* Copyright (C) 1998-2002, International Business Machines
	6	* Corporation and others. All Rights Reserved.
	7	*
	8	************************************************************************/
	9
	10
	11	#ifndef __FONTOBJECT_H
	12	#define __FONTOBJECT_H
	13
	14	#include <stdio.h>
	15
	16	#include "LETypes.h"
	17
	18
	19	#ifndef ANY_NUMBER
	20	#define ANY_NUMBER 1
	21	#endif
	22
	23	struct DirectoryEntry
	24	{
	25	le_uint32 tag;
	26	le_uint32 checksum;
	27	le_uint32 offset;
	28	le_uint32 length;
	29	};
	30
	31	struct SFNTDirectory
	32	{
	33	le_uint32 scalerType;
	34	le_uint16 numTables;
	35	le_uint16 searchRange;
	36	le_uint16 entrySelector;
	37	le_uint16 rangeShift;
	38	DirectoryEntry tableDirectory[ANY_NUMBER];
	39	};
	40
	41
	42	struct CMAPEncodingSubtableHeader
	43	{
	44	le_uint16 platformID;
	45	le_uint16 platformSpecificID;
	46	le_uint32 encodingOffset;
	47	};
	48
	49	struct CMAPTable
	50	{
	51	le_uint16 version;
	52	le_uint16 numberSubtables;
	53	CMAPEncodingSubtableHeader encodingSubtableHeaders[ANY_NUMBER];
	54	};
	55
	56	struct CMAPEncodingSubtable
	57	{
	58	le_uint16 format;
	59	le_uint16 length;
	60	le_uint16 language;
	61	};
	62
	63	struct CMAPFormat0Encoding : CMAPEncodingSubtable
	64	{
	65	le_uint8 glyphIndexArray[256];
	66	};
67
68	struct CMAPFormat2Subheader
69	{
70	le_uint16 firstCode;
71	le_uint16 entryCount;
72	le_int16 idDelta;
73	le_uint16 idRangeOffset;
74	};
75
76	struct CMAPFormat2Encoding : CMAPEncodingSubtable
77	{
78	le_uint16 subHeadKeys[256];
79	CMAPFormat2Subheader subheaders[ANY_NUMBER];
80	};
81
82	struct CMAPFormat4Encoding : CMAPEncodingSubtable
83	{
84	le_uint16 segCountX2;
85	le_uint16 searchRange;
86	le_uint16 entrySelector;
87	le_uint16 rangeShift;
88	le_uint16 endCodes[ANY_NUMBER];
89	// le_uint16 reservedPad;
90	// le_uint16 startCodes[ANY_NUMBER];
91	// le_uint16 idDelta[ANY_NUMBER];
92	// le_uint16 idRangeOffset[ANY_NUMBER];
93	// le_uint16 glyphIndexArray[ANY_NUMBER];
94	};
95
96	struct CMAPFormat6Encoding : CMAPEncodingSubtable
97	{
98	le_uint16 firstCode;
99	le_uint16 entryCount;
100	le_uint16 glyphIndexArray[ANY_NUMBER];
101	};
102
103	typedef le_int32 fixed;
104
105	struct BigDate
106	{
107	le_uint32 bc;
108	le_uint32 ad;
109	};
110
111	struct HEADTable
112	{
113	fixed version;
114	fixed fontRevision;
115	le_uint32 checksumAdjustment;
116	le_uint32 magicNumber;
117	le_uint16 flags;
118	le_uint16 unitsPerEm;
119	BigDate created;
120	BigDate modified;
121	le_int16 xMin;
122	le_int16 yMin;
123	le_int16 xMax;
124	le_int16 yMax;
125	le_int16 lowestRecPPEM;
126	le_int16 fontDirectionHint;
127	le_int16 indexToLocFormat;
128	le_int16 glyphDataFormat;
129	};
130
131	struct MAXPTable
132	{
133	fixed version;
134	le_uint16 numGlyphs;
135	le_uint16 maxPoints;
136	le_uint16 maxContours;
137	le_uint16 maxComponentPoints;
138	le_uint16 maxComponentContours;
139	le_uint16 maxZones;
140	le_uint16 maxTwilightPoints;
141	le_uint16 maxStorage;
142	le_uint16 maxFunctionDefs;
143	le_uint16 maxInstructionDefs;
144	le_uint16 maxStackElements;
145	le_uint16 maxSizeOfInstructions;
146	le_uint16 maxComponentElements;
147	le_uint16 maxComponentDepth;
148	};
149
150	struct HHEATable
151	{
152	fixed version;
153	le_int16 ascent;
154	le_int16 descent;
155	le_int16 lineGap;
156	le_uint16 advanceWidthMax;
157	le_int16 minLeftSideBearing;
158	le_int16 minRightSideBearing;
159	le_int16 xMaxExtent;
160	le_int16 caretSlopeRise;
161	le_int16 caretSlopeRun;
162	le_int16 caretOffset;
163	le_int16 reserved1;
164	le_int16 reserved2;
165	le_int16 reserved3;
166	le_int16 reserved4;
167	le_int16 metricDataFormat;
168	le_uint16 numOfLongHorMetrics;
169	};
170
171	struct LongHorMetric
172	{
173	le_uint16 advanceWidth;
174	le_int16 leftSideBearing;
175	};
176
177	struct HMTXTable
178	{
179	LongHorMetric hMetrics[ANY_NUMBER]; // ANY_NUMBER = numOfLongHorMetrics from hhea table
180	// le_int16 leftSideBearing[ANY_NUMBER]; // ANY_NUMBER = numGlyphs - numOfLongHorMetrics
181	};
182
183	class FontObject
184	{
185	public:
186	FontObject(char *fontName);
187	~FontObject();
188
189	void readTable(LETag tag, le_uint32 length);
190	void deleteTable(void *table);
191
192	LEGlyphID unicodeToGlyph(LEUnicode32 unicode);
193
194	#if 0
195	le_uint32 unicodesToGlyphs(LEUnicode chars, le_uint32 nChars, LEGlyphID glyphs,
196	le_uint32 *charIndices, le_bool rightToLeft);
197	#endif
198
199	le_uint16 getUnitsPerEM();
200
201	le_uint16 getGlyphAdvance(LEGlyphID glyph);
202
203	private:
204	FontObject();
205
206	DirectoryEntry *findTable(LETag tag);
207	CMAPEncodingSubtable *findCMAP(le_uint16 platformID, le_uint16 platformSpecificID);
208	void initUnicodeCMAP();
209
210	SFNTDirectory *directory;
211	le_uint16 numTables;
212	le_uint16 searchRange;
213	le_uint16 entrySelector;
214	le_uint16 rangeShift;
215
216	CMAPTable *cmapTable;
217	le_uint16 cmSegCount;
218	le_uint16 cmSearchRange;
219	le_uint16 cmEntrySelector;
220	le_uint16 cmRangeShift;
221	le_uint16 *cmEndCodes;
222	le_uint16 *cmStartCodes;
223	le_uint16 *cmIdDelta;
224	le_uint16 *cmIdRangeOffset;
225
226	HEADTable *headTable;
227
228	HMTXTable *hmtxTable;
229	le_uint16 numGlyphs;
230	le_uint16 numOfLongHorMetrics;
231
232	FILE *file;
233
234	};
235
236	#endif
237