Java example source code file (ContextualGlyphSubstProc2.cpp)

This example Java source code file (ContextualGlyphSubstProc2.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

contextualglyphsubstitutionprocessor2, le_get_glyph, le_set_glyph, le_unbounded_array, leerrorcode, leglyphid, lereferenceto, lereferencetoarrayof, null, swapl, swapw, test_format, ttglyphid, uobject_define_rtti_implementation

The ContextualGlyphSubstProc2.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.  and others 1998-2013 - All Rights Reserved
 *
 */

#include "LETypes.h"
#include "MorphTables.h"
#include "StateTables.h"
#include "MorphStateTables.h"
#include "SubtableProcessor2.h"
#include "StateTableProcessor2.h"
#include "ContextualGlyphSubstProc2.h"
#include "LEGlyphStorage.h"
#include "LESwaps.h"

U_NAMESPACE_BEGIN

UOBJECT_DEFINE_RTTI_IMPLEMENTATION(ContextualGlyphSubstitutionProcessor2)

ContextualGlyphSubstitutionProcessor2::ContextualGlyphSubstitutionProcessor2(
                                  const LEReferenceTo<MorphSubtableHeader2> &morphSubtableHeader, LEErrorCode &success)
  : StateTableProcessor2(morphSubtableHeader, success), contextualGlyphHeader(morphSubtableHeader, success)
{
    if(LE_FAILURE(success)) return;
    le_uint32 perGlyphTableOffset = SWAPL(contextualGlyphHeader->perGlyphTableOffset);
    perGlyphTable = LEReferenceToArrayOf<le_uint32> (stHeader, success, perGlyphTableOffset, LE_UNBOUNDED_ARRAY);
    entryTable = LEReferenceToArrayOf<ContextualGlyphStateEntry2>(stHeader, success, entryTableOffset, LE_UNBOUNDED_ARRAY);
}

ContextualGlyphSubstitutionProcessor2::~ContextualGlyphSubstitutionProcessor2()
{
}

void ContextualGlyphSubstitutionProcessor2::beginStateTable()
{
    markGlyph = 0;
}

le_uint16 ContextualGlyphSubstitutionProcessor2::processStateEntry(LEGlyphStorage &glyphStorage, le_int32 &currGlyph,
    EntryTableIndex2 index, LEErrorCode &success)
{
    if(LE_FAILURE(success)) return 0;
    const ContextualGlyphStateEntry2 *entry = entryTable.getAlias(index, success);
    if(LE_FAILURE(success)) return 0;
    le_uint16 newState = SWAPW(entry->newStateIndex);
    le_uint16 flags = SWAPW(entry->flags);
    le_int16 markIndex = SWAPW(entry->markIndex);
    le_int16 currIndex = SWAPW(entry->currIndex);

    if (markIndex != -1) {
        le_uint32 offset = SWAPL(perGlyphTable(markIndex, success));
        LEGlyphID mGlyph = glyphStorage[markGlyph];
        TTGlyphID newGlyph = lookup(offset, mGlyph, success);
        glyphStorage[markGlyph] = LE_SET_GLYPH(mGlyph, newGlyph);
    }

    if (currIndex != -1) {
        le_uint32 offset = SWAPL(perGlyphTable(currIndex, success));
        LEGlyphID thisGlyph = glyphStorage[currGlyph];
        TTGlyphID newGlyph = lookup(offset, thisGlyph, success);
        glyphStorage[currGlyph] = LE_SET_GLYPH(thisGlyph, newGlyph);
    }

    if (flags & cgsSetMark) {
        markGlyph = currGlyph;
    }

    if (!(flags & cgsDontAdvance)) {
        currGlyph += dir;
    }

    return newState;
}

TTGlyphID ContextualGlyphSubstitutionProcessor2::lookup(le_uint32 offset, LEGlyphID gid, LEErrorCode &success)
{
    TTGlyphID newGlyph = 0xFFFF;
    if(LE_FAILURE(success))  return newGlyph;
    LEReferenceTo<LookupTable> lookupTable(perGlyphTable, success, offset);
    if(LE_FAILURE(success))  return newGlyph;
    le_int16 format = SWAPW(lookupTable->format);

    switch (format) {
        case ltfSimpleArray: {
#ifdef TEST_FORMAT
            // Disabled pending for design review
            LEReferenceTo<SimpleArrayLookupTable> lookupTable0(lookupTable, success);
            LEReferenceToArrayOf<LookupValue> valueArray(lookupTable0, success, &lookupTable0->valueArray[0], LE_UNBOUNDED_ARRAY);
            if(LE_FAILURE(success))  return newGlyph;
            TTGlyphID glyphCode = (TTGlyphID) LE_GET_GLYPH(gid);
            newGlyph = SWAPW(lookupTable0->valueArray(glyphCode, success));
#endif
            break;
        }
        case ltfSegmentSingle: {
#ifdef TEST_FORMAT
            // Disabled pending for design review
            LEReferenceTo<SegmentSingleLookupTable> lookupTable2 = (SegmentSingleLookupTable *) lookupTable;
            const LookupSegment *segment = lookupTable2->lookupSegment(lookupTable2->segments, gid);
            if (segment != NULL) {
                newGlyph = SWAPW(segment->value);
            }
#endif
            break;
        }
        case ltfSegmentArray: {
            //printf("Context Lookup Table Format4: specific interpretation needed!\n");
            break;
        }
        case ltfSingleTable:
        {
#ifdef TEST_FORMAT
            // Disabled pending for design review
            LEReferenceTo<SingleTableLookupTable> lookupTable6 = (SingleTableLookupTable *) lookupTable;
            const LEReferenceTo<LookupSingle> segment = lookupTable6->lookupSingle(lookupTable6->entries, gid);
            if (segment != NULL) {
                newGlyph = SWAPW(segment->value);
            }
#endif
            break;
        }
        case ltfTrimmedArray: {
            LEReferenceTo<TrimmedArrayLookupTable> lookupTable8(lookupTable, success);
            if (LE_FAILURE(success)) return newGlyph;
            TTGlyphID firstGlyph = SWAPW(lookupTable8->firstGlyph);
            TTGlyphID glyphCount = SWAPW(lookupTable8->glyphCount);
            TTGlyphID lastGlyph  = firstGlyph + glyphCount;
            TTGlyphID glyphCode = (TTGlyphID) LE_GET_GLYPH(gid);
            if ((glyphCode >= firstGlyph) && (glyphCode < lastGlyph)) {
              LEReferenceToArrayOf<LookupValue> valueArray(lookupTable8, success, &lookupTable8->valueArray[0], glyphCount);
              newGlyph = SWAPW(valueArray(glyphCode - firstGlyph, success));
            }
        }
        default:
            break;
    }
    return newGlyph;
}

void ContextualGlyphSubstitutionProcessor2::endStateTable()
{
}

U_NAMESPACE_END