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      1 /*
      2  * %W% %W%
      3  *
      4  * (C) Copyright IBM Corp. 1998 - 2013 - All Rights Reserved
      5  *
      6  */
      7 
      8 
      9 #include "LETypes.h"
     10 #include "LayoutTables.h"
     11 #include "MorphTables.h"
     12 #include "SubtableProcessor.h"
     13 #include "IndicRearrangementProcessor.h"
     14 #include "ContextualGlyphSubstProc.h"
     15 #include "LigatureSubstProc.h"
     16 #include "NonContextualGlyphSubstProc.h"
     17 //#include "ContextualGlyphInsertionProcessor.h"
     18 #include "LEGlyphStorage.h"
     19 #include "LESwaps.h"
     20 
     21 U_NAMESPACE_BEGIN
     22 
     23 void MorphTableHeader::process(const LETableReference &base, LEGlyphStorage &glyphStorage, LEErrorCode &success) const
     24 {
     25   le_uint32 chainCount = SWAPL(this->nChains);
     26   LEReferenceTo<ChainHeader> chainHeader(base, success, chains); // moving header
     27     LEReferenceToArrayOf<ChainHeader> chainHeaderArray(base, success, chains, chainCount);
     28     le_uint32 chain;
     29 
     30     for (chain = 0; LE_SUCCESS(success) && (chain < chainCount); chain += 1) {
     31         FeatureFlags defaultFlags = SWAPL(chainHeader->defaultFlags);
     32         le_uint32 chainLength = SWAPL(chainHeader->chainLength);
     33         le_int16 nFeatureEntries = SWAPW(chainHeader->nFeatureEntries);
     34         le_int16 nSubtables = SWAPW(chainHeader->nSubtables);
     35         LEReferenceTo<MorphSubtableHeader> subtableHeader =
     36           LEReferenceTo<MorphSubtableHeader>(chainHeader,success, &(chainHeader->featureTable[nFeatureEntries]));
     37         le_int16 subtable;
     38 
     39         for (subtable = 0; LE_SUCCESS(success) && (subtable < nSubtables); subtable += 1) {
     40             le_int16 length = SWAPW(subtableHeader->length);
     41             SubtableCoverage coverage = SWAPW(subtableHeader->coverage);
     42             FeatureFlags subtableFeatures = SWAPL(subtableHeader->subtableFeatures);
     43 
     44             // should check coverage more carefully...
     45             if ((coverage & scfVertical) == 0 && (subtableFeatures & defaultFlags) != 0  && LE_SUCCESS(success)) {
     46               subtableHeader->process(subtableHeader, glyphStorage, success);
     47             }
     48 
     49             subtableHeader.addOffset(length, success);
     50         }
     51         chainHeader.addOffset(chainLength, success);
     52     }
     53 }
     54 
     55 void MorphSubtableHeader::process(const LEReferenceTo<MorphSubtableHeader> &base, LEGlyphStorage &glyphStorage, LEErrorCode &success) const
     56 {
     57     SubtableProcessor *processor = NULL;
     58 
     59     switch (SWAPW(coverage) & scfTypeMask)
     60     {
     61     case mstIndicRearrangement:
     62       processor = new IndicRearrangementProcessor(base, success);
     63         break;
     64 
     65     case mstContextualGlyphSubstitution:
     66       processor = new ContextualGlyphSubstitutionProcessor(base, success);
     67         break;
     68 
     69     case mstLigatureSubstitution:
     70       processor = new LigatureSubstitutionProcessor(base, success);
     71         break;
     72 
     73     case mstReservedUnused:
     74         break;
     75 
     76     case mstNonContextualGlyphSubstitution:
     77       processor = NonContextualGlyphSubstitutionProcessor::createInstance(base, success);
     78         break;
     79 
     80     /*
     81     case mstContextualGlyphInsertion:
     82         processor = new ContextualGlyphInsertionProcessor(this);
     83         break;
     84     */
     85 
     86     default:
     87         break;
     88     }
     89 
     90     if (processor != NULL) {
     91       if(LE_SUCCESS(success)) {
     92         processor->process(glyphStorage, success);
     93       }
     94       delete processor;
     95     }
     96 }
     97 
     98 U_NAMESPACE_END
     99