icuSources/test/letest/FontObject.h

   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