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An Open Source JavaFX PDF Viewer
/*
* ===========================================
* Java Pdf Extraction Decoding Access Library
* ===========================================
*
* Project Info: http://www.idrsolutions.com
* Help section for developers at http://www.idrsolutions.com/support/
*
* (C) Copyright 1997-2015 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
*
* ---------------
* Hmtx.java
* ---------------
*/
package org.jpedal.fonts.tt;
import org.jpedal.utils.LogWriter;
public class Hmtx extends Table {
private int[] hMetrics;
private short[] leftSideBearing;
private float scaling=1f/1000f;
public Hmtx(final FontFile2 currentFontFile, final int glyphCount,int metricsCount, final int maxAdvance){
scaling=maxAdvance;
if(metricsCount<0) {
metricsCount = -metricsCount;
}
//move to start and check exists
final int startPointer=currentFontFile.selectTable(FontFile2.HMTX);
int lsbCount=glyphCount-metricsCount;
//System.out.println("start="+Integer.toHexString(startPointer)+" lsbCount="+lsbCount+" glyphCount="+glyphCount+" metricsCount="+metricsCount);
hMetrics = new int[glyphCount];
leftSideBearing = new short[glyphCount];
int currentMetric=0;
//read 'head' table
if(startPointer==0){
if(LogWriter.isOutput()) {
LogWriter.writeLog("No Htmx table found");
}
}else if(lsbCount<0){
if(LogWriter.isOutput()) {
LogWriter.writeLog("Invalid Htmx table found");
}
}else{
int i ;
for (i = 0; i < metricsCount; i++){
currentMetric=currentFontFile.getNextUint16();
hMetrics[i] =currentMetric;
leftSideBearing[i] = currentFontFile.getNextInt16();
//System.out.println(i+"="+hMetrics[i]+" "+leftSideBearing[i]);
}
//workout actual number of values in table
final int tableLength=currentFontFile.getTableSize(FontFile2.HMTX);
final int lsbBytes=tableLength-(i*4); //each entry above used 4 bytes
lsbCount=(lsbBytes/2); //each entry contains 2 bytes
//catch needed for 48789.pdf
try{
//read additional lsb entries
for(int j=i;j=leftSideBearing.length) {
return 0;
} else {
return leftSideBearing[i];
}
}
public short getLeftSideBearing(final int i) {
final int length=hMetrics.length;
if (i < length) {
return (short)(hMetrics[i] & 0xffff);
} else if(leftSideBearing==null){
return 0;
}else{
final int ptr=i-length;
if(ptr>=0 && ptr> 16;
} else {
return hMetrics[hMetrics.length - 1] >> 16;
}*/
return ( (hMetrics[i]-getLeftSideBearing(i))/scaling);
}
public float getWidth(final int i) {
/**if (i < hMetrics.length) {
return hMetrics[i] >> 16;
} else {
return hMetrics[hMetrics.length - 1] >> 16;
}*/
final float w=hMetrics[i];
return ( (w)/scaling);
}
public float getUnscaledWidth(final int i) {
return hMetrics[i];
}
}