1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/os/textandloc/fontservices/textshaperplugin/IcuSource/layout/ContextualGlyphSubstProc.cpp	Fri Jun 15 03:10:57 2012 +0200
     1.3 @@ -0,0 +1,79 @@
     1.4 +/*
     1.5 + *
     1.6 + * (C) Copyright IBM Corp. 1998-2004 - All Rights Reserved
     1.7 + *
     1.8 + */
     1.9 +
    1.10 +#include "LETypes.h"
    1.11 +#include "MorphTables.h"
    1.12 +#include "StateTables.h"
    1.13 +#include "MorphStateTables.h"
    1.14 +#include "SubtableProcessor.h"
    1.15 +#include "StateTableProcessor.h"
    1.16 +#include "ContextualGlyphSubstProc.h"
    1.17 +#include "LEGlyphStorage.h"
    1.18 +#include "LESwaps.h"
    1.19 +
    1.20 +U_NAMESPACE_BEGIN
    1.21 +
    1.22 +UOBJECT_DEFINE_RTTI_IMPLEMENTATION(ContextualGlyphSubstitutionProcessor)
    1.23 +
    1.24 +ContextualGlyphSubstitutionProcessor::ContextualGlyphSubstitutionProcessor(const MorphSubtableHeader *morphSubtableHeader)
    1.25 +  : StateTableProcessor(morphSubtableHeader)
    1.26 +{
    1.27 +    contextualGlyphSubstitutionHeader = (const ContextualGlyphSubstitutionHeader *) morphSubtableHeader;
    1.28 +    substitutionTableOffset = SWAPW(contextualGlyphSubstitutionHeader->substitutionTableOffset);
    1.29 +
    1.30 +    entryTable = (const ContextualGlyphSubstitutionStateEntry *) ((char *) &stateTableHeader->stHeader + entryTableOffset);
    1.31 +}
    1.32 +
    1.33 +ContextualGlyphSubstitutionProcessor::~ContextualGlyphSubstitutionProcessor()
    1.34 +{
    1.35 +}
    1.36 +
    1.37 +void ContextualGlyphSubstitutionProcessor::beginStateTable()
    1.38 +{
    1.39 +    markGlyph = 0;
    1.40 +}
    1.41 +
    1.42 +ByteOffset ContextualGlyphSubstitutionProcessor::processStateEntry(LEGlyphStorage &glyphStorage, le_int32 &currGlyph, EntryTableIndex index)
    1.43 +{
    1.44 +    const ContextualGlyphSubstitutionStateEntry *entry = &entryTable[index];
    1.45 +    ByteOffset newState = SWAPW(entry->newStateOffset);
    1.46 +    le_int16 flags = SWAPW(entry->flags);
    1.47 +    WordOffset markOffset = SWAPW(entry->markOffset);
    1.48 +    WordOffset currOffset = SWAPW(entry->currOffset);
    1.49 +
    1.50 +    if (markOffset != 0) {
    1.51 +        const le_int16 *table = (const le_int16 *) ((char *) &stateTableHeader->stHeader + markOffset * 2);
    1.52 +        LEGlyphID mGlyph = glyphStorage[markGlyph];
    1.53 +        TTGlyphID newGlyph = SWAPW(table[LE_GET_GLYPH(mGlyph)]);
    1.54 +
    1.55 +         glyphStorage[markGlyph] = LE_SET_GLYPH(mGlyph, newGlyph);
    1.56 +    }
    1.57 +
    1.58 +    if (currOffset != 0) {
    1.59 +        const le_int16 *table = (const le_int16 *) ((char *) &stateTableHeader->stHeader + currOffset * 2);
    1.60 +        LEGlyphID thisGlyph = glyphStorage[currGlyph];
    1.61 +        TTGlyphID newGlyph = SWAPW(table[LE_GET_GLYPH(thisGlyph)]);
    1.62 +
    1.63 +        glyphStorage[currGlyph] = LE_SET_GLYPH(thisGlyph, newGlyph);
    1.64 +    }
    1.65 +
    1.66 +    if (flags & cgsSetMark) {
    1.67 +        markGlyph = currGlyph;
    1.68 +    }
    1.69 +
    1.70 +    if (!(flags & cgsDontAdvance)) {
    1.71 +        // should handle reverse too!
    1.72 +        currGlyph += 1;
    1.73 +    }
    1.74 +
    1.75 +    return newState;
    1.76 +}
    1.77 +
    1.78 +void ContextualGlyphSubstitutionProcessor::endStateTable()
    1.79 +{
    1.80 +}
    1.81 +
    1.82 +U_NAMESPACE_END