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

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/*
 * ===========================================
 * Java Pdf Extraction Decoding Access Library
 * ===========================================
 *
 * Project Info:  http://www.idrsolutions.com
 * Help section for developers at http://www.idrsolutions.com/support/
 *
 * (C) Copyright 1997-2016 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