org.jpedal.fonts.Dict 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
*
@LICENSE@
*
* ---------------
* Dict.java
* ---------------
*/
package org.jpedal.fonts;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
public class Dict {
private int pos;
private final byte[] data;
public LinkedHashMap entries = new LinkedHashMap();
public Dict privateDict;
public Dict[] fontDicts;
public byte[][] subrsIndexData;
public int ascent = 1000;
public int descent;
public int[] widths;
public CIDCharset charset;
public CIDEncoding encoding;
public CIDFDSelect fdSelect;
public LinkedHashMap trackers = new LinkedHashMap();
Dict(final byte[] data) {
List operands = new ArrayList();
this.data = data;
final int end = data.length;
while (pos < end) {
int b = data[pos] & 0xff;
if (b <= 21) {
if (b == 12) {
b = (b << 8) | (data[++pos] & 0xff);
}
Number[] operandsArr = new Number[operands.size()];
operandsArr = operands.toArray(operandsArr);
entries.put(b, operandsArr);
operands = new ArrayList();
++pos;
} else {
operands.add(parseOperand());
}
}
}
private Number parseOperand() {
int value = data[pos++] & 0xff;
if (value == 30) {
return parseFloatOperand();
} else if (value == 28) {
value = data[pos++] & 0xff;
value = ((value << 24) | ((data[pos++] & 0xff) << 16)) >> 16;
return value;
} else if (value == 29) {
value = data[pos++] & 0xff;
value = (value << 8) | (data[pos++] & 0xff);
value = (value << 8) | (data[pos++] & 0xff);
value = (value << 8) | (data[pos++] & 0xff);
return value;
} else if (value >= 32 && value <= 246) {
return value - 139;
} else if (value >= 247 && value <= 250) {
return ((value - 247) * 256) + (data[pos++] & 0xff) + 108;
} else if (value >= 251 && value <= 254) {
return -((value - 251) * 256) - (data[pos++] & 0xff) - 108;
}
return null;
}
private float parseFloatOperand() {
final StringBuilder str = new StringBuilder();
final int eof = 15;
final String[] lookup = {"0", "1", "2", "3", "4", "5", "6", "7", "8", "9", ".", "E", "E-", null, "-"};
final int length = data.length;
while (pos < length) {
final int b = data[pos++] & 0xff;
final int b1 = b >> 4;
final int b2 = b & 15;
if (b1 == eof) {
break;
}
str.append(lookup[b1]);
if (b2 == eof) {
break;
}
str.append(lookup[b2]);
}
String res = str.toString();
if (res.isEmpty()) {
return 0;
} else if (res.startsWith("E")) {
res = "1" + res;
}
return Float.parseFloat(res);
}
}