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2 // License & terms of use: http://www.unicode.org/copyright.html

3 /***************************************************************************

4 *

7 *

8 ************************************************************************/

11 #ifndef __FONTOBJECT_H

12 #define __FONTOBJECT_H

14 #include <stdio.h>

16 #include "LETypes.h"

19 #ifndef ANY_NUMBER

20 #define ANY_NUMBER 1

21 #endif

23 struct DirectoryEntry

24 {

25 le_uint32 tag;

26 le_uint32 checksum;

27 le_uint32 offset;

28 le_uint32 length;

29 };

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 };

42 struct CMAPEncodingSubtableHeader

43 {

44 le_uint16 platformID;

45 le_uint16 platformSpecificID;

46 le_uint32 encodingOffset;

47 };

49 struct CMAPTable

50 {

51 le_uint16 version;

52 le_uint16 numberSubtables;

53 CMAPEncodingSubtableHeader encodingSubtableHeaders[ANY_NUMBER];

54 };

56 struct CMAPEncodingSubtable

57 {

58 le_uint16 format;

59 le_uint16 length;

60 le_uint16 language;

61 };

63 struct CMAPFormat0Encoding : CMAPEncodingSubtable

64 {

65 le_uint8 glyphIndexArray[256];

66 };

68 struct CMAPFormat2Subheader

69 {

70 le_uint16 firstCode;

71 le_uint16 entryCount;

72 le_int16 idDelta;

73 le_uint16 idRangeOffset;

74 };

76 struct CMAPFormat2Encoding : CMAPEncodingSubtable

77 {

78 le_uint16 subHeadKeys[256];

79 CMAPFormat2Subheader subheaders[ANY_NUMBER];

80 };

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 };

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:

     FontObject(char *fontName);

187 ~FontObject();

188

     void *readTable(LETag tag, le_uint32 *length);

     void deleteTable(void *table);

191

192 LEGlyphID unicodeToGlyph(LEUnicode32 unicode);

193

194 #if 0

     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);

     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;

232 FILE *file;

234 };

236 #endif