source/layout/Lookups.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 "Lookups.h"
  10 #include "CoverageTables.h"
  11 #include "LESwaps.h"
  12
  13 U_NAMESPACE_BEGIN
  14
  15 const LEReferenceTo<LookupTable> LookupListTable::getLookupTable(const LEReferenceTo<LookupListTable> &base, le_uint16 lookupTableIndex, LEErrorCode &success) const
  16 {
  17   LEReferenceToArrayOf<Offset> lookupTableOffsetArrayRef(base, success, (const Offset*)&lookupTableOffsetArray, SWAPW(lookupCount));
  18
  19   if(LE_FAILURE(success) || lookupTableIndex>lookupTableOffsetArrayRef.getCount()) {
  20     return LEReferenceTo<LookupTable>();
  21   } else {
  22     return LEReferenceTo<LookupTable>(base, success, SWAPW(lookupTableOffsetArrayRef.getObject(lookupTableIndex, success)));
  23   }
  24 }
  25
  26 const LEReferenceTo<LookupSubtable> LookupTable::getLookupSubtable(const LEReferenceTo<LookupTable> &base, le_uint16 subtableIndex, LEErrorCode &success) const
  27 {
  28   LEReferenceToArrayOf<Offset> subTableOffsetArrayRef(base, success, (const Offset*)&subTableOffsetArray, SWAPW(subTableCount));
  29
  30   if(LE_FAILURE(success) || subtableIndex>subTableOffsetArrayRef.getCount()) {
  31     return LEReferenceTo<LookupSubtable>();
  32   } else {
  33     return LEReferenceTo<LookupSubtable>(base, success, SWAPW(subTableOffsetArrayRef.getObject(subtableIndex, success)));
  34   }
  35 }
  36
  37 le_int32 LookupSubtable::getGlyphCoverage(const LEReferenceTo<LookupSubtable> &base, Offset tableOffset, LEGlyphID glyphID, LEErrorCode &success) const
  38 {
  39   const LEReferenceTo<CoverageTable> coverageTable(base, success, SWAPW(tableOffset));
  40
  41   if(LE_FAILURE(success)) return 0;
  42
  43   return coverageTable->getGlyphCoverage(glyphID);
  44 }
  45
  46 U_NAMESPACE_END