org.jpedal.fonts.glyph.objects.T1GlyphNumber 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 1997-2015 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
*
* ---------------
* T1GlyphNumber.java
* ---------------
*/
package org.jpedal.fonts.glyph.objects;
import org.jpedal.fonts.objects.FontData;
public class T1GlyphNumber {
private static final String nybChars = "0123456789.ee -";
/**
* Utility method used during processing of type1C files
*/
public static final int getNumber(final byte[] fontDataAsArray, int pos, final double[] values, final int valuePointer, final boolean is1C) {
final int b0;
int i;
double x = 0;
b0 = fontDataAsArray[pos] & 0xFF;
if (b0 < 28 || b0 == 31) { //error!
System.err.println("!!!!Incorrect type1C operand");
} else if (b0 == 28) { //2 byte number in range -32768
// +32767
x = (fontDataAsArray[pos + 1] << 8) + (fontDataAsArray[pos + 2] & 0xff);
pos += 3;
} else if (b0 == 255) {
if (is1C) {
x = ((fontDataAsArray[pos + 1] & 0xFF) << 8) + (fontDataAsArray[pos + 2] & 0xFF);
x += (((fontDataAsArray[pos + 3] & 0xFF) << 8) + (fontDataAsArray[pos + 4] & 0xFF)) / 65536.0;
if (fontDataAsArray[pos + 1] < 0) {
x -= 65536;
}
} else {
//x=((content[pos + 1]& 127) << 24) + (content[pos + 2]<<16)+(content[pos + 3] << 8) + content[pos + 4];
x =
((fontDataAsArray[pos + 1] & 0xFF) << 24)
+ ((fontDataAsArray[pos + 2] & 0xFF) << 16)
+ ((fontDataAsArray[pos + 3] & 0xFF) << 8)
+ (fontDataAsArray[pos + 4] & 0xFF);
}
pos += 5;
} else if (b0 == 29) { //4 byte signed number
x =
((fontDataAsArray[pos + 1] & 0xFF) << 24)
+ ((fontDataAsArray[pos + 2] & 0xFF) << 16)
+ ((fontDataAsArray[pos + 3] & 0xFF) << 8)
+ (fontDataAsArray[pos + 4] & 0xFF);
pos += 5;
} else if (b0 == 30) { //BCD values
final char[] buf = new char[65];
pos += 1;
i = 0;
while (i < 64) {
final int b = fontDataAsArray[pos++] & 0xFF;
final int nyb0 = (b >> 4) & 0x0f;
final int nyb1 = b & 0x0f;
if (nyb0 == 0xf) {
break;
}
buf[i++] = nybChars.charAt(nyb0);
if (i == 64) {
break;
}
if (nyb0 == 0xc) {
buf[i++] = '-';
}
if (i == 64) {
break;
}
if (nyb1 == 0xf) {
break;
}
buf[i++] = nybChars.charAt(nyb1);
if (i == 64) {
break;
}
if (nyb1 == 0xc) {
buf[i++] = '-';
}
}
x = Double.valueOf(new String(buf, 0, i));
} else if (b0 < 247) { //-107 +107
x = b0 - 139;
pos++;
} else if (b0 < 251) { //2 bytes +108 +1131
x = ((b0 - 247) << 8) + (fontDataAsArray[pos + 1] & 0xff) + 108;
pos += 2;
} else { //-1131 -108
x = -((b0 - 251) << 8) - (fontDataAsArray[pos + 1] & 0xff) - 108;
pos += 2;
}
//assign number
values[valuePointer] = x;
return pos;
}
/**
* Utility method used during processing of type1C files
*/
public static final int getNumber(final FontData fontDataAsObject, int pos, final double[] values, final int valuePointer, final boolean is1C) {
final int b0;
int i;
double x = 0;
b0 = fontDataAsObject.getByte(pos) & 0xFF;
if ((b0 < 28 || b0 == 31)) { //error!
System.err.println("!!!!Incorrect type1C operand");
} else if (b0 == 28) { //2 byte number in range -32768
// +32767
x = (fontDataAsObject.getByte(pos + 1) << 8) + (fontDataAsObject.getByte(pos + 2) & 0xff);
pos += 3;
} else if (b0 == 255) {
if (is1C) {
int top = ((fontDataAsObject.getByte(pos + 1) & 0xFF) << 8) + (fontDataAsObject.getByte(pos + 2) & 0xFF);
if (top > 32768) {
top = 65536 - top;
}
final double numb = top;
final double dec = ((fontDataAsObject.getByte(pos + 3) & 0xFF) << 8) + (fontDataAsObject.getByte(pos + 4) & 0xFF);
x = numb + (dec / 65536);
if (fontDataAsObject.getByte(pos + 1) < 0) {
x = -x;
}
} else {
//x=((content[pos + 1]& 127) << 24) + (content[pos + 2]<<16)+(content[pos + 3] << 8) + content[pos + 4];
x =
((fontDataAsObject.getByte(pos + 1) & 0xFF) << 24)
+ ((fontDataAsObject.getByte(pos + 2) & 0xFF) << 16)
+ ((fontDataAsObject.getByte(pos + 3) & 0xFF) << 8)
+ (fontDataAsObject.getByte(pos + 4) & 0xFF);
}
pos += 5;
} else if (b0 == 29) { //4 byte signed number
x =
((fontDataAsObject.getByte(pos + 1) & 0xFF) << 24)
+ ((fontDataAsObject.getByte(pos + 2) & 0xFF) << 16)
+ ((fontDataAsObject.getByte(pos + 3) & 0xFF) << 8)
+ (fontDataAsObject.getByte(pos + 4) & 0xFF);
pos += 5;
} else if (b0 == 30) { //BCD values
final char[] buf = new char[65];
pos += 1;
i = 0;
while (i < 64) {
final int b = fontDataAsObject.getByte(pos++) & 0xFF;
final int nyb0 = (b >> 4) & 0x0f;
final int nyb1 = b & 0x0f;
if (nyb0 == 0xf) {
break;
}
buf[i++] = nybChars.charAt(nyb0);
if (i == 64) {
break;
}
if (nyb0 == 0xc) {
buf[i++] = '-';
}
if (i == 64) {
break;
}
if (nyb1 == 0xf) {
break;
}
buf[i++] = nybChars.charAt(nyb1);
if (i == 64) {
break;
}
if (nyb1 == 0xc) {
buf[i++] = '-';
}
}
x = Double.valueOf(new String(buf, 0, i));
} else if (b0 < 247) { //-107 +107
x = b0 - 139;
pos++;
} else if (b0 < 251) { //2 bytes +108 +1131
x = ((b0 - 247) << 8) + (fontDataAsObject.getByte(pos + 1) & 0xff) + 108;
pos += 2;
} else { //-1131 -108
x = -((b0 - 251) << 8) - (fontDataAsObject.getByte(pos + 1) & 0xff) - 108;
pos += 2;
}
//assign number
values[valuePointer] = x;
return pos;
}
}
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