source/layout/SegmentArrayProcessor.cpp

   1 /*
   2  *
   3  * (C) Copyright IBM Corp. 1998-2015 - All Rights Reserved
   4  *
   5  */
   6
   7 #include "LETypes.h"
   8 #include "MorphTables.h"
   9 #include "SubtableProcessor.h"
  10 #include "NonContextualGlyphSubst.h"
  11 #include "NonContextualGlyphSubstProc.h"
  12 #include "SegmentArrayProcessor.h"
  13 #include "LEGlyphStorage.h"
  14 #include "LESwaps.h"
  15
  16 U_NAMESPACE_BEGIN
  17
  18 UOBJECT_DEFINE_RTTI_IMPLEMENTATION(SegmentArrayProcessor)
  19
  20 SegmentArrayProcessor::SegmentArrayProcessor()
  21 {
  22 }
  23
  24 SegmentArrayProcessor::SegmentArrayProcessor(const LEReferenceTo<MorphSubtableHeader> &morphSubtableHeader, LEErrorCode &success)
  25   : NonContextualGlyphSubstitutionProcessor(morphSubtableHeader, success)
  26 {
  27   LEReferenceTo<NonContextualGlyphSubstitutionHeader> header(morphSubtableHeader, success);
  28   segmentArrayLookupTable = LEReferenceTo<SegmentArrayLookupTable>(morphSubtableHeader, success, (const SegmentArrayLookupTable*)&header->table);
  29 }
  30
  31 SegmentArrayProcessor::~SegmentArrayProcessor()
  32 {
  33 }
  34
  35 void SegmentArrayProcessor::process(LEGlyphStorage &glyphStorage, LEErrorCode &success)
  36 {
  37     const LookupSegment *segments = segmentArrayLookupTable->segments;
  38     le_int32 glyphCount = glyphStorage.getGlyphCount();
  39     le_int32 glyph;
  40
  41     if (LE_FAILURE(success)) return;
  42
  43     for (glyph = 0; glyph < glyphCount; glyph += 1) {
  44         LEGlyphID thisGlyph = glyphStorage[glyph];
  45         const LookupSegment *lookupSegment = segmentArrayLookupTable->lookupSegment(segmentArrayLookupTable, segments, thisGlyph, success);
  46
  47         if (lookupSegment != NULL)  {
  48             TTGlyphID firstGlyph = SWAPW(lookupSegment->firstGlyph);
  49             le_int16  offset = SWAPW(lookupSegment->value);
  50
  51             if (offset != 0) {
  52               LEReferenceToArrayOf<TTGlyphID> glyphArray(subtableHeader, success, offset, LE_UNBOUNDED_ARRAY);
  53               TTGlyphID   newGlyph   = SWAPW(glyphArray(LE_GET_GLYPH(thisGlyph) - firstGlyph, success));
  54               glyphStorage[glyph] = LE_SET_GLYPH(thisGlyph, newGlyph);
  55             }
  56         }
  57     }
  58 }
  59
  60 U_NAMESPACE_END