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1 /**************************************************************************

2 *

4 * License & terms of use: http://www.unicode.org/copyright.html#License

5 *

6 ***************************************************************************

7 ***************************************************************************

8 *

11 *

12 ************************************************************************/

15 #ifndef __FONTOBJECT_H

16 #define __FONTOBJECT_H

18 #include <stdio.h>

20 #include "LETypes.h"

23 #ifndef ANY_NUMBER

24 #define ANY_NUMBER 1

25 #endif

27 struct DirectoryEntry

28 {

29 le_uint32 tag;

30 le_uint32 checksum;

31 le_uint32 offset;

32 le_uint32 length;

33 };

35 struct SFNTDirectory

36 {

37 le_uint32 scalerType;

38 le_uint16 numTables;

39 le_uint16 searchRange;

40 le_uint16 entrySelector;

41 le_uint16 rangeShift;

42 DirectoryEntry tableDirectory[ANY_NUMBER];

43 };

46 struct CMAPEncodingSubtableHeader

47 {

48 le_uint16 platformID;

49 le_uint16 platformSpecificID;

50 le_uint32 encodingOffset;

51 };

53 struct CMAPTable

54 {

55 le_uint16 version;

56 le_uint16 numberSubtables;

57 CMAPEncodingSubtableHeader encodingSubtableHeaders[ANY_NUMBER];

58 };

60 struct CMAPEncodingSubtable

61 {

62 le_uint16 format;

63 le_uint16 length;

64 le_uint16 language;

65 };

67 struct CMAPFormat0Encoding : CMAPEncodingSubtable

68 {

69 le_uint8 glyphIndexArray[256];

70 };

72 struct CMAPFormat2Subheader

73 {

74 le_uint16 firstCode;

75 le_uint16 entryCount;

76 le_int16 idDelta;

77 le_uint16 idRangeOffset;

78 };

80 struct CMAPFormat2Encoding : CMAPEncodingSubtable

81 {

82 le_uint16 subHeadKeys[256];

83 CMAPFormat2Subheader subheaders[ANY_NUMBER];

84 };

86 struct CMAPFormat4Encoding : CMAPEncodingSubtable

87 {

88 le_uint16 segCountX2;

89 le_uint16 searchRange;

90 le_uint16 entrySelector;

91 le_uint16 rangeShift;

92 le_uint16 endCodes[ANY_NUMBER];

93 // le_uint16 reservedPad;

94 // le_uint16 startCodes[ANY_NUMBER];

95 // le_uint16 idDelta[ANY_NUMBER];

96 // le_uint16 idRangeOffset[ANY_NUMBER];

97 // le_uint16 glyphIndexArray[ANY_NUMBER];

98 };

100 struct CMAPFormat6Encoding : CMAPEncodingSubtable

101 {

102 le_uint16 firstCode;

103 le_uint16 entryCount;

104 le_uint16 glyphIndexArray[ANY_NUMBER];

105 };

106

107 typedef le_int32 fixed;

108

109 struct BigDate

110 {

111 le_uint32 bc;

112 le_uint32 ad;

113 };

114

115 struct HEADTable

116 {

117 fixed version;

118 fixed fontRevision;

119 le_uint32 checksumAdjustment;

120 le_uint32 magicNumber;

121 le_uint16 flags;

122 le_uint16 unitsPerEm;

123 BigDate created;

124 BigDate modified;

125 le_int16 xMin;

126 le_int16 yMin;

127 le_int16 xMax;

128 le_int16 yMax;

129 le_int16 lowestRecPPEM;

130 le_int16 fontDirectionHint;

131 le_int16 indexToLocFormat;

132 le_int16 glyphDataFormat;

133 };

134

135 struct MAXPTable

136 {

137 fixed version;

138 le_uint16 numGlyphs;

139 le_uint16 maxPoints;

140 le_uint16 maxContours;

141 le_uint16 maxComponentPoints;

142 le_uint16 maxComponentContours;

143 le_uint16 maxZones;

144 le_uint16 maxTwilightPoints;

145 le_uint16 maxStorage;

146 le_uint16 maxFunctionDefs;

147 le_uint16 maxInstructionDefs;

148 le_uint16 maxStackElements;

149 le_uint16 maxSizeOfInstructions;

150 le_uint16 maxComponentElements;

151 le_uint16 maxComponentDepth;

152 };

153

154 struct HHEATable

155 {

156 fixed version;

157 le_int16 ascent;

158 le_int16 descent;

159 le_int16 lineGap;

160 le_uint16 advanceWidthMax;

161 le_int16 minLeftSideBearing;

162 le_int16 minRightSideBearing;

163 le_int16 xMaxExtent;

164 le_int16 caretSlopeRise;

165 le_int16 caretSlopeRun;

166 le_int16 caretOffset;

167 le_int16 reserved1;

168 le_int16 reserved2;

169 le_int16 reserved3;

170 le_int16 reserved4;

171 le_int16 metricDataFormat;

172 le_uint16 numOfLongHorMetrics;

173 };

174

175 struct LongHorMetric

176 {

177 le_uint16 advanceWidth;

178 le_int16 leftSideBearing;

179 };

180

181 struct HMTXTable

182 {

183 LongHorMetric hMetrics[ANY_NUMBER]; // ANY_NUMBER = numOfLongHorMetrics from hhea table

184 // le_int16 leftSideBearing[ANY_NUMBER]; // ANY_NUMBER = numGlyphs - numOfLongHorMetrics

185 };

186

187 class FontObject

188 {

189 public:

     FontObject(char *fontName);

191 ~FontObject();

192

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

     void deleteTable(void *table);

195

196 LEGlyphID unicodeToGlyph(LEUnicode32 unicode);

197

198 #if 0

     le_uint32 unicodesToGlyphs(LEUnicode *chars, le_uint32 nChars, LEGlyphID *glyphs,

200 le_uint32 *charIndices, le_bool rightToLeft);

201 #endif

202

203 le_uint16 getUnitsPerEM();

204

205 le_uint16 getGlyphAdvance(LEGlyphID glyph);

206

207 private:

208 FontObject();

209

210 DirectoryEntry *findTable(LETag tag);

     CMAPEncodingSubtable *findCMAP(le_uint16 platformID, le_uint16 platformSpecificID);

212 void initUnicodeCMAP();

213

214 SFNTDirectory *directory;

215 le_uint16 numTables;

216 le_uint16 searchRange;

217 le_uint16 entrySelector;

218 le_uint16 rangeShift;

219

220 CMAPTable *cmapTable;

221 le_uint16 cmSegCount;

222 le_uint16 cmSearchRange;

223 le_uint16 cmEntrySelector;

224 le_uint16 cmRangeShift;

225 le_uint16 *cmEndCodes;

226 le_uint16 *cmStartCodes;

227 le_uint16 *cmIdDelta;

228 le_uint16 *cmIdRangeOffset;

229

230 HEADTable *headTable;

231

232 HMTXTable *hmtxTable;

233 le_uint16 numGlyphs;

234 le_uint16 numOfLongHorMetrics;

236 FILE *file;

238 };

240 #endif