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iText, a free Java-PDF library
/*
* Copyright 2002 by Paulo Soares.
*
* The contents of this file are subject to the Mozilla Public License Version 1.1
* (the "License"); you may not use this file except in compliance with the License.
* You may obtain a copy of the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the License.
*
* The Original Code is 'iText, a free JAVA-PDF library'.
*
* The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
* the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
* All Rights Reserved.
* Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
* are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
*
* Contributor(s): all the names of the contributors are added in the source code
* where applicable.
*
* Alternatively, the contents of this file may be used under the terms of the
* LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
* provisions of LGPL are applicable instead of those above. If you wish to
* allow use of your version of this file only under the terms of the LGPL
* License and not to allow others to use your version of this file under
* the MPL, indicate your decision by deleting the provisions above and
* replace them with the notice and other provisions required by the LGPL.
* If you do not delete the provisions above, a recipient may use your version
* of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the MPL as stated above or under the terms of the GNU
* Library General Public License as published by the Free Software Foundation;
* either version 2 of the License, or 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 Library general Public License for more
* details.
*
* If you didn't download this code from the following link, you should check if
* you aren't using an obsolete version:
* http://www.lowagie.com/iText/
*/
package com.lowagie.text.pdf;
import java.awt.Canvas;
import java.awt.Color;
import java.awt.Image;
import java.awt.image.MemoryImageSource;
import com.lowagie.text.Rectangle;
/** Implements the Postnet and Planet barcodes. The default parameters are:
*
*n = 72f / 22f; // distance between bars
*x = 0.02f * 72f; // bar width
*barHeight = 0.125f * 72f; // height of the tall bars
*size = 0.05f * 72f; // height of the short bars
*codeType = POSTNET; // type of code
*
*
* @author Paulo Soares ([email protected])
*/
public class BarcodePostnet extends Barcode{
/** The bars for each character.
*/
private static final byte BARS[][] =
{
{1,1,0,0,0},
{0,0,0,1,1},
{0,0,1,0,1},
{0,0,1,1,0},
{0,1,0,0,1},
{0,1,0,1,0},
{0,1,1,0,0},
{1,0,0,0,1},
{1,0,0,1,0},
{1,0,1,0,0}
};
/** Creates new BarcodePostnet */
public BarcodePostnet() {
n = 72f / 22f; // distance between bars
x = 0.02f * 72f; // bar width
barHeight = 0.125f * 72f; // height of the tall bars
size = 0.05f * 72f; // height of the short bars
codeType = POSTNET; // type of code
}
/** Creates the bars for Postnet.
* @param text the code to be created without checksum
* @return the bars
*/
public static byte[] getBarsPostnet(String text) {
int total = 0;
for (int k = text.length() - 1; k >= 0; --k) {
int n = text.charAt(k) - '0';
total += n;
}
text += (char)(((10 - (total % 10)) % 10) + '0');
byte bars[] = new byte[text.length() * 5 + 2];
bars[0] = 1;
bars[bars.length - 1] = 1;
for (int k = 0; k < text.length(); ++k) {
int c = text.charAt(k) - '0';
System.arraycopy(BARS[c], 0, bars, k * 5 + 1, 5);
}
return bars;
}
/** Gets the maximum area that the barcode and the text, if
* any, will occupy. The lower left corner is always (0, 0).
* @return the size the barcode occupies.
*/
public Rectangle getBarcodeSize() {
float width = ((code.length() + 1) * 5 + 1) * n + x;
return new Rectangle(width, barHeight);
}
/** Places the barcode in a PdfContentByte. The
* barcode is always placed at coordinates (0, 0). Use the
* translation matrix to move it elsewhere.
* The bars and text are written in the following colors:
*
*
* barColor
textColor
Result
*
* null
null
bars and text painted with current fill color
*
* barColor
null
bars and text painted with barColor
*
* null
textColor
bars painted with current color
text painted with textColor
*
* barColor
textColor
bars painted with barColor
text painted with textColor
*
* @param cb the PdfContentByte where the barcode will be placed
* @param barColor the color of the bars. It can be null
* @param textColor the color of the text. It can be null
* @return the dimensions the barcode occupies
*/
public Rectangle placeBarcode(PdfContentByte cb, Color barColor, Color textColor) {
if (barColor != null)
cb.setColorFill(barColor);
byte bars[] = getBarsPostnet(code);
byte flip = 1;
if (codeType == PLANET) {
flip = 0;
bars[0] = 0;
bars[bars.length - 1] = 0;
}
float startX = 0;
for (int k = 0; k < bars.length; ++k) {
cb.rectangle(startX, 0, x - inkSpreading, bars[k] == flip ? barHeight : size);
startX += n;
}
cb.fill();
return getBarcodeSize();
}
/** Creates a java.awt.Image. This image only
* contains the bars without any text.
* @param foreground the color of the bars
* @param background the color of the background
* @return the image
*
*/
public java.awt.Image createAwtImage(Color foreground, Color background) {
int f = foreground.getRGB();
int g = background.getRGB();
Canvas canvas = new Canvas();
int barWidth = (int)x;
if (barWidth <= 0)
barWidth = 1;
int barDistance = (int)n;
if (barDistance <= barWidth)
barDistance = barWidth + 1;
int barShort = (int)size;
if (barShort <= 0)
barShort = 1;
int barTall = (int)barHeight;
if (barTall <= barShort)
barTall = barShort + 1;
int width = ((code.length() + 1) * 5 + 1) * barDistance + barWidth;
int pix[] = new int[width * barTall];
byte bars[] = getBarsPostnet(code);
byte flip = 1;
if (codeType == PLANET) {
flip = 0;
bars[0] = 0;
bars[bars.length - 1] = 0;
}
int idx = 0;
for (int k = 0; k < bars.length; ++k) {
boolean dot = (bars[k] == flip);
for (int j = 0; j < barDistance; ++j) {
pix[idx + j] = ((dot && j < barWidth) ? f : g);
}
idx += barDistance;
}
int limit = width * (barTall - barShort);
for (int k = width; k < limit; k += width)
System.arraycopy(pix, 0, pix, k, width);
idx = limit;
for (int k = 0; k < bars.length; ++k) {
for (int j = 0; j < barDistance; ++j) {
pix[idx + j] = ((j < barWidth) ? f : g);
}
idx += barDistance;
}
for (int k = limit + width; k < pix.length; k += width)
System.arraycopy(pix, limit, pix, k, width);
Image img = canvas.createImage(new MemoryImageSource(width, barTall, pix, 0, width));
return img;
}
}