icuSources/layout/SegmentArrayProcessor.cpp

   1 /*
   2  *
   3  * (C) Copyright IBM Corp. 1998-2004 - 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 MorphSubtableHeader *morphSubtableHeader)
  25   : NonContextualGlyphSubstitutionProcessor(morphSubtableHeader)
  26 {
  27     const NonContextualGlyphSubstitutionHeader *header = (const NonContextualGlyphSubstitutionHeader *) morphSubtableHeader;
  28
  29     segmentArrayLookupTable = (const SegmentArrayLookupTable *) &header->table;
  30 }
  31
  32 SegmentArrayProcessor::~SegmentArrayProcessor()
  33 {
  34 }
  35
  36 void SegmentArrayProcessor::process(LEGlyphStorage &glyphStorage)
  37 {
  38     const LookupSegment *segments = segmentArrayLookupTable->segments;
  39     le_int32 glyphCount = glyphStorage.getGlyphCount();
  40     le_int32 glyph;
  41
  42     for (glyph = 0; glyph < glyphCount; glyph += 1) {
  43         LEGlyphID thisGlyph = glyphStorage[glyph];
  44         const LookupSegment *lookupSegment = segmentArrayLookupTable->lookupSegment(segments, thisGlyph);
  45
  46         if (lookupSegment != NULL)  {
  47             TTGlyphID firstGlyph = SWAPW(lookupSegment->firstGlyph);
  48             le_int16  offset = SWAPW(lookupSegment->value);
  49
  50             if (offset != 0) {
  51                 TTGlyphID  *glyphArray = (TTGlyphID *) ((char *) subtableHeader + offset);
  52                 TTGlyphID   newGlyph   = SWAPW(glyphArray[LE_GET_GLYPH(thisGlyph) - firstGlyph]);
  53
  54                 glyphStorage[glyph] = LE_SET_GLYPH(thisGlyph, newGlyph);
  55             }
  56         }
  57     }
  58 }
  59
  60 U_NAMESPACE_END