/*

 *

 * (C) Copyright IBM Corp. 1998-2004 - All Rights Reserved

 *

 */

#include "LETypes.h"

#include "LEGlyphFilter.h"

#include "OpenTypeTables.h"

#include "GlyphSubstitutionTables.h"

#include "SingleSubstitutionSubtables.h"

#include "GlyphIterator.h"

#include "LESwaps.h"

U_NAMESPACE_BEGIN

le_uint32 SingleSubstitutionSubtable::process(GlyphIterator *glyphIterator, const LEGlyphFilter *filter) const

{

    switch(SWAPW(subtableFormat))

    {

    case 0:

        return 0;

    case 1:

    {

        const SingleSubstitutionFormat1Subtable *subtable = (const SingleSubstitutionFormat1Subtable *) this;

        return subtable->process(glyphIterator, filter);

    }

    case 2:

    {

        const SingleSubstitutionFormat2Subtable *subtable = (const SingleSubstitutionFormat2Subtable *) this;

        return subtable->process(glyphIterator, filter);

    }

    default:

        return 0;

    }

}

le_uint32 SingleSubstitutionFormat1Subtable::process(GlyphIterator *glyphIterator, const LEGlyphFilter *filter) const

{

    LEGlyphID glyph = glyphIterator->getCurrGlyphID();

    le_int32 coverageIndex = getGlyphCoverage(glyph);

    if (coverageIndex >= 0) {

        TTGlyphID substitute = ((TTGlyphID) LE_GET_GLYPH(glyph)) + SWAPW(deltaGlyphID);

        if (filter == NULL || filter->accept(LE_SET_GLYPH(glyph, substitute))) {

            glyphIterator->setCurrGlyphID(substitute);

        }

        return 1;

    }

    return 0;

}

le_uint32 SingleSubstitutionFormat2Subtable::process(GlyphIterator *glyphIterator, const LEGlyphFilter *filter) const

{

    LEGlyphID glyph = glyphIterator->getCurrGlyphID();

    le_int32 coverageIndex = getGlyphCoverage(glyph);

    if (coverageIndex >= 0) {

        TTGlyphID substitute = SWAPW(substituteArray[coverageIndex]);

        if (filter == NULL || filter->accept(LE_SET_GLYPH(glyph, substitute))) {

            glyphIterator->setCurrGlyphID(substitute);

        }

        return 1;

    }

    return 0;

}

U_NAMESPACE_END