view src/share/native/sun/font/layout/CursiveAttachmentSubtables.cpp @ 10377:2dfb4ef6c76d

8056276: Fontmanager feature improvements Reviewed-by: srl, bae, mschoene
author prr
date Thu, 11 Sep 2014 10:27:31 -0700
parents d4f4a9915357
children 1a9ced185295
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/*
 * 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
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/*
 * (C) Copyright IBM Corp. 1998 - 2005 - All Rights Reserved
 *
 */

#include "LETypes.h"
#include "OpenTypeTables.h"
#include "GlyphPositioningTables.h"
#include "CursiveAttachmentSubtables.h"
#include "AnchorTables.h"
#include "GlyphIterator.h"
#include "OpenTypeUtilities.h"
#include "LESwaps.h"

U_NAMESPACE_BEGIN

le_uint32 CursiveAttachmentSubtable::process(const LEReferenceTo<CursiveAttachmentSubtable> &base, GlyphIterator *glyphIterator, const LEFontInstance *fontInstance, LEErrorCode &success) const
{
    LEGlyphID glyphID       = glyphIterator->getCurrGlyphID();
    le_int32  coverageIndex = getGlyphCoverage(base, glyphID, success);
    le_uint16 eeCount       = SWAPW(entryExitCount);

    LEReferenceToArrayOf<EntryExitRecord>
        entryExitRecordsArrayRef(base, success, entryExitRecords, coverageIndex);

    if (coverageIndex < 0 || coverageIndex >= eeCount || LE_FAILURE(success)) {
        glyphIterator->setCursiveGlyph();
        return 0;
    }

    LEPoint entryAnchor, exitAnchor;
    Offset entryOffset = SWAPW(entryExitRecords[coverageIndex].entryAnchor);
    Offset exitOffset  = SWAPW(entryExitRecords[coverageIndex].exitAnchor);

    if (entryOffset != 0) {
        LEReferenceTo<AnchorTable> entryAnchorTable(base, success, entryOffset);

        if( LE_SUCCESS(success) ) {
          entryAnchorTable->getAnchor(entryAnchorTable, glyphID, fontInstance, entryAnchor, success);
          glyphIterator->setCursiveEntryPoint(entryAnchor);
        }
    } else {
        //glyphIterator->clearCursiveEntryPoint();
    }

    if (exitOffset != 0) {
        LEReferenceTo<AnchorTable> exitAnchorTable(base, success, exitOffset);

        if( LE_SUCCESS(success) ) {
          exitAnchorTable->getAnchor(exitAnchorTable, glyphID, fontInstance, exitAnchor, success);
          glyphIterator->setCursiveExitPoint(exitAnchor);
        }
    } else {
        //glyphIterator->clearCursiveExitPoint();
    }

    return 1;
}

U_NAMESPACE_END