Java tutorial
/* * * This file is part of the iText (R) project. Copyright (c) 1998-2019 iText Group NV * Authors: Bruno Lowagie, Paulo Soares, et al. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License version 3 * as published by the Free Software Foundation with the addition of the * following permission added to Section 15 as permitted in Section 7(a): * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY * ITEXT GROUP. ITEXT GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT * OF THIRD PARTY RIGHTS * * This program 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 Affero General Public License for more details. * You should have received a copy of the GNU Affero General Public License * along with this program; if not, see http://www.gnu.org/licenses or write to * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, * Boston, MA, 02110-1301 USA, or download the license from the following URL: * http://itextpdf.com/terms-of-use/ * * The interactive user interfaces in modified source and object code versions * of this program must display Appropriate Legal Notices, as required under * Section 5 of the GNU Affero General Public License. * * In accordance with Section 7(b) of the GNU Affero General Public License, * a covered work must retain the producer line in every PDF that is created * or manipulated using iText. * * You can be released from the requirements of the license by purchasing * a commercial license. Buying such a license is mandatory as soon as you * develop commercial activities involving the iText software without * disclosing the source code of your own applications. * These activities include: offering paid services to customers as an ASP, * serving PDFs on the fly in a web application, shipping iText with a closed * source product. * * For more information, please contact iText Software Corp. at this * address: sales@itextpdf.com */ package com.itextpdf.text.pdf; import com.itextpdf.text.Rectangle; import com.itextpdf.text.BaseColor; /** Implements the Postnet and Planet barcodes. The default parameters are: * <pre> *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 * </pre> * * @author Paulo Soares */ 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 <CODE>PdfContentByte</CODE>. The * barcode is always placed at coordinates (0, 0). Use the * translation matrix to move it elsewhere.<p> * The bars and text are written in the following colors:<p> * <P><TABLE BORDER=1> * <TR> * <TH><P><CODE>barColor</CODE></TH> * <TH><P><CODE>textColor</CODE></TH> * <TH><P>Result</TH> * </TR> * <TR> * <TD><P><CODE>null</CODE></TD> * <TD><P><CODE>null</CODE></TD> * <TD><P>bars and text painted with current fill color</TD> * </TR> * <TR> * <TD><P><CODE>barColor</CODE></TD> * <TD><P><CODE>null</CODE></TD> * <TD><P>bars and text painted with <CODE>barColor</CODE></TD> * </TR> * <TR> * <TD><P><CODE>null</CODE></TD> * <TD><P><CODE>textColor</CODE></TD> * <TD><P>bars painted with current color<br>text painted with <CODE>textColor</CODE></TD> * </TR> * <TR> * <TD><P><CODE>barColor</CODE></TD> * <TD><P><CODE>textColor</CODE></TD> * <TD><P>bars painted with <CODE>barColor</CODE><br>text painted with <CODE>textColor</CODE></TD> * </TR> * </TABLE> * @param cb the <CODE>PdfContentByte</CODE> where the barcode will be placed * @param barColor the color of the bars. It can be <CODE>null</CODE> * @param textColor the color of the text. It can be <CODE>null</CODE> * @return the dimensions the barcode occupies */ public Rectangle placeBarcode(PdfContentByte cb, BaseColor barColor, BaseColor 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(); } // AWT related methods (remove this if you port to Android / GAE) /** Creates a <CODE>java.awt.Image</CODE>. 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(java.awt.Color foreground, java.awt.Color background) { int f = foreground.getRGB(); int g = background.getRGB(); java.awt.Canvas canvas = new java.awt.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); java.awt.Image img = canvas .createImage(new java.awt.image.MemoryImageSource(width, barTall, pix, 0, width)); return img; } }