80 lines
1.9 KiB
C++
80 lines
1.9 KiB
C++
/*
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* @(#)SingleSubstitutionSubtables.cpp 1.6 00/03/15
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*
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* (C) Copyright IBM Corp. 1998, 1999, 2000 - All Rights Reserved
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*
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*/
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#include "LETypes.h"
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#include "LEGlyphFilter.h"
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#include "OpenTypeTables.h"
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#include "GlyphSubstitutionTables.h"
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#include "SingleSubstitutionSubtables.h"
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#include "GlyphIterator.h"
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#include "LESwaps.h"
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le_uint32 SingleSubstitutionSubtable::process(GlyphIterator *glyphIterator, const LEGlyphFilter *filter) const
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{
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switch(SWAPW(subtableFormat))
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{
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case 0:
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return 0;
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case 1:
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{
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const SingleSubstitutionFormat1Subtable *subtable = (const SingleSubstitutionFormat1Subtable *) this;
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return subtable->process(glyphIterator, filter);
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}
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case 2:
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{
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const SingleSubstitutionFormat2Subtable *subtable = (const SingleSubstitutionFormat2Subtable *) this;
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return subtable->process(glyphIterator, filter);
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}
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default:
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return 0;
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}
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}
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le_uint32 SingleSubstitutionFormat1Subtable::process(GlyphIterator *glyphIterator, const LEGlyphFilter *filter) const
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{
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LEGlyphID glyph = (LEGlyphID) glyphIterator->getCurrGlyphID();
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le_int32 coverageIndex = getGlyphCoverage(glyph);
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if (coverageIndex >= 0)
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{
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LEGlyphID substitute = glyph + SWAPW(deltaGlyphID);
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if (filter == NULL || filter->accept(substitute)) {
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glyphIterator->setCurrGlyphID(substitute);
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}
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return 1;
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}
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return 0;
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}
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le_uint32 SingleSubstitutionFormat2Subtable::process(GlyphIterator *glyphIterator, const LEGlyphFilter *filter) const
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{
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LEGlyphID glyph = (LEGlyphID) glyphIterator->getCurrGlyphID();
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le_int32 coverageIndex = getGlyphCoverage(glyph);
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if (coverageIndex >= 0)
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{
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LEGlyphID substitute = SWAPW(substituteArray[coverageIndex]);
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if (filter == NULL || filter->accept(substitute)) {
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glyphIterator->setCurrGlyphID(substitute);
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}
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return 1;
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}
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return 0;
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}
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