icuSources/layout/ClassDefinitionTables.cpp

   1 /*
   2  *
   3  * (C) Copyright IBM Corp. 1998-2013 - All Rights Reserved
   4  *
   5  */
   6
   7 #include "LETypes.h"
   8 #include "OpenTypeTables.h"
   9 #include "OpenTypeUtilities.h"
  10 #include "ClassDefinitionTables.h"
  11 #include "LESwaps.h"
  12
  13 U_NAMESPACE_BEGIN
  14
  15 le_int32 ClassDefinitionTable::getGlyphClass(const LETableReference& base, LEGlyphID glyphID, LEErrorCode &success) const
  16 {
  17   LEReferenceTo<ClassDefinitionTable> thisRef(base, success);
  18   if (LE_FAILURE(success)) return 0;
  19
  20   switch(SWAPW(classFormat)) {
  21     case 0:
  22         return 0;
  23
  24     case 1:
  25     {
  26       const LEReferenceTo<ClassDefFormat1Table> f1Table(thisRef, success);
  27       return f1Table->getGlyphClass(f1Table, glyphID, success);
  28     }
  29
  30     case 2:
  31     {
  32       const LEReferenceTo<ClassDefFormat2Table> f2Table(thisRef, success);
  33       return  f2Table->getGlyphClass(f2Table, glyphID, success);
  34     }
  35
  36     default:
  37         return 0;
  38   }
  39 }
  40
  41 le_bool ClassDefinitionTable::hasGlyphClass(const LETableReference &base, le_int32 glyphClass, LEErrorCode &success) const
  42 {
  43     LEReferenceTo<ClassDefinitionTable> thisRef(base, success);
  44     if (LE_FAILURE(success)) return 0;
  45
  46     switch(SWAPW(classFormat)) {
  47     case 0:
  48         return 0;
  49
  50     case 1:
  51     {
  52       const LEReferenceTo<ClassDefFormat1Table> f1Table(thisRef, success);
  53       return f1Table->hasGlyphClass(f1Table, glyphClass, success);
  54     }
  55
  56     case 2:
  57     {
  58       const LEReferenceTo<ClassDefFormat2Table> f2Table(thisRef, success);
  59       return f2Table->hasGlyphClass(f2Table, glyphClass, success);
  60     }
  61
  62     default:
  63         return 0;
  64     }
  65 }
  66
  67 le_int32 ClassDefFormat1Table::getGlyphClass(const LETableReference& base, LEGlyphID glyphID, LEErrorCode &success) const
  68 {
  69     if(LE_FAILURE(success)) return 0;
  70
  71     le_uint16 count = SWAPW(glyphCount);
  72     LEReferenceToArrayOf<le_uint16> classValueArrayRef(base, success, &classValueArray[0], count);
  73     TTGlyphID ttGlyphID  = (TTGlyphID) LE_GET_GLYPH(glyphID);
  74     TTGlyphID firstGlyph = SWAPW(startGlyph);
  75     TTGlyphID lastGlyph  = firstGlyph + count;
  76
  77     if (LE_SUCCESS(success) && ttGlyphID >= firstGlyph && ttGlyphID < lastGlyph) {
  78       return SWAPW( classValueArrayRef(ttGlyphID - firstGlyph, success) );
  79     }
  80
  81     return 0;
  82 }
  83
  84 le_bool ClassDefFormat1Table::hasGlyphClass(const LETableReference &base, le_int32 glyphClass, LEErrorCode &success) const
  85 {
  86     if(LE_FAILURE(success)) return 0;
  87     le_uint16 count = SWAPW(glyphCount);
  88     LEReferenceToArrayOf<le_uint16> classValueArrayRef(base, success, &classValueArray[0], count);
  89     int i;
  90
  91     for (i = 0; LE_SUCCESS(success)&& (i < count); i += 1) {
  92       if (SWAPW(classValueArrayRef(i,success)) == glyphClass) {
  93             return TRUE;
  94         }
  95     }
  96
  97     return FALSE;
  98 }
  99
 100 le_int32 ClassDefFormat2Table::getGlyphClass(const LETableReference& base, LEGlyphID glyphID, LEErrorCode &success) const
 101 {
 102     if(LE_FAILURE(success)) return 0;
 103     TTGlyphID ttGlyph    = (TTGlyphID) LE_GET_GLYPH(glyphID);
 104     le_uint16 rangeCount = SWAPW(classRangeCount);
 105     LEReferenceToArrayOf<GlyphRangeRecord> classRangeRecordArrayRef(base, success, &classRangeRecordArray[0], rangeCount);
 106     le_int32  rangeIndex =
 107       OpenTypeUtilities::getGlyphRangeIndex(ttGlyph, classRangeRecordArrayRef, success);
 108
 109     if (rangeIndex < 0 || LE_FAILURE(success)) {
 110         return 0;
 111     }
 112
 113     return SWAPW(classRangeRecordArrayRef(rangeIndex, success).rangeValue);
 114 }
 115
 116 le_bool ClassDefFormat2Table::hasGlyphClass(const LETableReference &base, le_int32 glyphClass, LEErrorCode &success) const
 117 {
 118     if(LE_FAILURE(success)) return 0;
 119     le_uint16 rangeCount = SWAPW(classRangeCount);
 120     LEReferenceToArrayOf<GlyphRangeRecord> classRangeRecordArrayRef(base, success, &classRangeRecordArray[0], rangeCount);
 121     int i;
 122
 123     for (i = 0; i < rangeCount && LE_SUCCESS(success); i += 1) {
 124       if (SWAPW(classRangeRecordArrayRef(i,success).rangeValue) == glyphClass) {
 125             return TRUE;
 126         }
 127     }
 128
 129     return FALSE;
 130 }
 131
 132 U_NAMESPACE_END