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      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
    133