org.jpedal.fonts.tt.Loca Maven / Gradle / Ivy

/*
 * ===========================================
 * Java Pdf Extraction Decoding Access Library
 * ===========================================
 *
 * Project Info:  http://www.idrsolutions.com
 * Help section for developers at http://www.idrsolutions.com/support/
 *
 * (C) Copyright 1997-2017 IDRsolutions and Contributors.
 *
 * This file is part of JPedal/JPDF2HTML5
 *
     This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library 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
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA


 *
 * ---------------
 * Loca.java
 * ---------------
 */
package org.jpedal.fonts.tt;

import org.jpedal.utils.LogWriter;


public class Loca extends Table {

    /**
     * points to location of glyph programs
     */
    int[] glyphIndexStart;

    boolean isCorrupted;

    public int format;
    public int glyphCount;
    public int glyfTableLength;

    public Loca(final FontFile2 currentFontFile, final int glyphCount, final int format) {

        //handles super call in LocaWriter
        if (currentFontFile == null) {
            return;
        }

        this.format = format;
        this.glyphCount = glyphCount;
        this.glyfTableLength = currentFontFile.getOffset(FontFile2.GLYF);

        //LogWriter.writeMethod("{readLocaTable}", 0);

        //move to start and check exists
        final int startPointer = currentFontFile.selectTable(FontFile2.LOCA);

        int i;

        final int locaLength = currentFontFile.getOffset(FontFile2.LOCA);

        glyphIndexStart = new int[glyphCount + 1];

        //read 'head' table
        if (startPointer != 0) {

            glyphIndexStart[0] = 0;
            //long version
            if (format == 1 || format == 256) { //some tools get the byte order wrong
                if ((locaLength / 4) != (glyphCount + 1)) {
                    LogWriter.writeLog("Incorrect length");
                }

                for (i = 0; i < glyphCount; i++) {
                    glyphIndexStart[i] = currentFontFile.getNextUint32();
                }

            } else { //short
//		if((locaLength/2)!=(glyphCount+1)){
//		    
//		    if(LogWriter.isOutput())
//			LogWriter.writeLog("Incorrect length");
//		    
//		    isCorrupted=true;
//		}else{
                for (i = 0; i < glyphCount; i++) {
                    glyphIndexStart[i] = (currentFontFile.getNextUint16() * 2);
                }

                //}
            }

            glyphIndexStart[glyphCount] = glyfTableLength;

        }
    }

    public int[] getIndices() {
        return glyphIndexStart;
    }

    public boolean isCorrupted() {
        return isCorrupted;
    }

    public int getFormat() {
        return format;
    }

    public int getGlyphCount() {
        return glyphCount;
    }

    public int getGlyfTableLength() {
        return glyfTableLength;
    }
}