Java example source code file (LigatureSubstSubtables.cpp)

This example Java source code file (LigatureSubstSubtables.cpp) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

glyphiterator, le_failure, le_success, leerrorcode, leglyphfilter, lereferenceto, lereferencetoarrayof, letablereference, null, offset, swapw, ttglyphid, u_namespace_begin, u_namespace_end

The LigatureSubstSubtables.cpp Java example source code

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 *
 */

/*
 *
 *
 * (C) Copyright IBM Corp. 1998-2006 - All Rights Reserved
 *
 */

#include "LETypes.h"
#include "LEGlyphFilter.h"
#include "OpenTypeTables.h"
#include "GlyphSubstitutionTables.h"
#include "LigatureSubstSubtables.h"
#include "GlyphIterator.h"
#include "LESwaps.h"

U_NAMESPACE_BEGIN

le_uint32 LigatureSubstitutionSubtable::process(const LETableReference &base, GlyphIterator *glyphIterator, LEErrorCode &success, const LEGlyphFilter *filter) const
{
    LEGlyphID glyph = glyphIterator->getCurrGlyphID();
    le_int32 coverageIndex = getGlyphCoverage(base, glyph, success);

    if (LE_FAILURE(success)) {
      return 0;
    }

    LEReferenceToArrayOf<Offset> ligSetTableOffsetArrayRef(base, success, ligSetTableOffsetArray, SWAPW(ligSetCount));

    if (coverageIndex >= 0 && LE_SUCCESS(success) && (le_uint32)coverageIndex < ligSetTableOffsetArrayRef.getCount()) {
        Offset ligSetTableOffset = SWAPW(ligSetTableOffsetArray[coverageIndex]);
        LEReferenceTo<LigatureSetTable>   ligSetTable(base, success, ligSetTableOffset);

        if( LE_FAILURE(success) ) { return 0; }
        le_uint16 ligCount = SWAPW(ligSetTable->ligatureCount);

        LEReferenceTo<Offset> ligatureTableOffsetArray(base, success, ligSetTable->ligatureTableOffsetArray, ligCount);
        for (le_uint16 lig = 0; LE_SUCCESS(success) && lig < ligCount; lig += 1) {
            Offset ligTableOffset = SWAPW(ligSetTable->ligatureTableOffsetArray[lig]);
            LEReferenceTo<LigatureTable>   ligTable(ligSetTable, success, ligTableOffset);
            if(LE_FAILURE(success)) { return 0; }
            le_uint16 compCount = SWAPW(ligTable->compCount) - 1;
            le_int32 startPosition = glyphIterator->getCurrStreamPosition();
            TTGlyphID ligGlyph = SWAPW(ligTable->ligGlyph);
            le_uint16 comp;

            for (comp = 0; comp < compCount; comp += 1) {
                if (! glyphIterator->next()) {
                    break;
                }

                if (LE_GET_GLYPH(glyphIterator->getCurrGlyphID()) != SWAPW(ligTable->componentArray[comp])) {
                    break;
                }
            }

            if (comp == compCount && (filter == NULL || filter->accept(LE_SET_GLYPH(glyph, ligGlyph), success))) {
                GlyphIterator tempIterator(*glyphIterator);
                TTGlyphID deletedGlyph = tempIterator.ignoresMarks()? 0xFFFE : 0xFFFF;

                while (comp > 0) {
                    tempIterator.setCurrGlyphID(deletedGlyph);
                    tempIterator.prev();

                    comp -= 1;
                }

                tempIterator.setCurrGlyphID(ligGlyph);

                return compCount + 1;
            }

            glyphIterator->setCurrStreamPosition(startPosition);
        }

    }

    return 0;
}

U_NAMESPACE_END