001/* 002 * $Id: BarcodeQRCode.java 4784 2011-03-15 08:33:00Z blowagie $ 003 * 004 * This file is part of the iText (R) project. 005 * Copyright (c) 1998-2011 1T3XT BVBA 006 * Authors: Bruno Lowagie, Paulo Soares, et al. 007 * 008 * This program is free software; you can redistribute it and/or modify 009 * it under the terms of the GNU Affero General Public License version 3 010 * as published by the Free Software Foundation with the addition of the 011 * following permission added to Section 15 as permitted in Section 7(a): 012 * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY 1T3XT, 013 * 1T3XT DISCLAIMS THE WARRANTY OF NON INFRINGEMENT OF THIRD PARTY RIGHTS. 014 * 015 * This program is distributed in the hope that it will be useful, but 016 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 017 * or FITNESS FOR A PARTICULAR PURPOSE. 018 * See the GNU Affero General Public License for more details. 019 * You should have received a copy of the GNU Affero General Public License 020 * along with this program; if not, see http://www.gnu.org/licenses or write to 021 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 022 * Boston, MA, 02110-1301 USA, or download the license from the following URL: 023 * http://itextpdf.com/terms-of-use/ 024 * 025 * The interactive user interfaces in modified source and object code versions 026 * of this program must display Appropriate Legal Notices, as required under 027 * Section 5 of the GNU Affero General Public License. 028 * 029 * In accordance with Section 7(b) of the GNU Affero General Public License, 030 * a covered work must retain the producer line in every PDF that is created 031 * or manipulated using iText. 032 * 033 * You can be released from the requirements of the license by purchasing 034 * a commercial license. Buying such a license is mandatory as soon as you 035 * develop commercial activities involving the iText software without 036 * disclosing the source code of your own applications. 037 * These activities include: offering paid services to customers as an ASP, 038 * serving PDFs on the fly in a web application, shipping iText with a closed 039 * source product. 040 * 041 * For more information, please contact iText Software Corp. at this 042 * address: sales@itextpdf.com 043 */ 044package com.itextpdf.text.pdf; 045 046import com.itextpdf.text.pdf.qrcode.EncodeHintType; 047import com.itextpdf.text.pdf.qrcode.WriterException; 048import com.itextpdf.text.pdf.qrcode.ByteMatrix; 049import com.itextpdf.text.pdf.qrcode.QRCodeWriter; 050import com.itextpdf.text.BadElementException; 051import com.itextpdf.text.ExceptionConverter; 052import com.itextpdf.text.Image; 053import com.itextpdf.text.pdf.codec.CCITTG4Encoder; 054import java.awt.Canvas; 055import java.awt.image.MemoryImageSource; 056import java.util.Map; 057 058/** 059 * A QRCode implementation based on the zxing code. 060 * @author Paulo Soares 061 * @since 5.0.2 062 */ 063public class BarcodeQRCode { 064 ByteMatrix bm; 065 066 /** 067 * Creates the QR barcode. The barcode is always created with the smallest possible size and is then stretched 068 * to the width and height given. Set the width and height to 1 to get an unscaled barcode. 069 * @param content the text to be encoded 070 * @param width the barcode width 071 * @param height the barcode height 072 * @param hints modifiers to change the way the barcode is create. They can be EncodeHintType.ERROR_CORRECTION 073 * and EncodeHintType.CHARACTER_SET. For EncodeHintType.ERROR_CORRECTION the values can be ErrorCorrectionLevel.L, M, Q, H. 074 * For EncodeHintType.CHARACTER_SET the values are strings and can be Cp437, Shift_JIS and ISO-8859-1 to ISO-8859-16. The default value is 075 * ISO-8859-1. 076 * @throws WriterException 077 */ 078 public BarcodeQRCode(String content, int width, int height, Map<EncodeHintType,Object> hints) { 079 try { 080 QRCodeWriter qc = new QRCodeWriter(); 081 bm = qc.encode(content, width, height, hints); 082 } 083 catch (WriterException ex) { 084 throw new ExceptionConverter(ex); 085 } 086 } 087 088 private byte[] getBitMatrix() { 089 int width = bm.getWidth(); 090 int height = bm.getHeight(); 091 int stride = (width + 7) / 8; 092 byte[] b = new byte[stride * height]; 093 byte[][] mt = bm.getArray(); 094 for (int y = 0; y < height; ++y) { 095 byte[] line = mt[y]; 096 for (int x = 0; x < width; ++x) { 097 if (line[x] != 0) { 098 int offset = stride * y + x / 8; 099 b[offset] |= (byte)(0x80 >> (x % 8)); 100 } 101 } 102 } 103 return b; 104 } 105 106 /** Gets an <CODE>Image</CODE> with the barcode. 107 * @return the barcode <CODE>Image</CODE> 108 * @throws BadElementException on error 109 */ 110 public Image getImage() throws BadElementException { 111 byte[] b = getBitMatrix(); 112 byte g4[] = CCITTG4Encoder.compress(b, bm.getWidth(), bm.getHeight()); 113 return Image.getInstance(bm.getWidth(), bm.getHeight(), false, Image.CCITTG4, Image.CCITT_BLACKIS1, g4, null); 114 } 115 116 /** Creates a <CODE>java.awt.Image</CODE>. 117 * @param foreground the color of the bars 118 * @param background the color of the background 119 * @return the image 120 */ 121 public java.awt.Image createAwtImage(java.awt.Color foreground, java.awt.Color background) { 122 int f = foreground.getRGB(); 123 int g = background.getRGB(); 124 Canvas canvas = new Canvas(); 125 126 int width = bm.getWidth(); 127 int height = bm.getHeight(); 128 int pix[] = new int[width * height]; 129 byte[][] mt = bm.getArray(); 130 for (int y = 0; y < height; ++y) { 131 byte[] line = mt[y]; 132 for (int x = 0; x < width; ++x) { 133 pix[y * width + x] = line[x] == 0 ? f : g; 134 } 135 } 136 137 java.awt.Image img = canvas.createImage(new MemoryImageSource(width, height, pix, 0, width)); 138 return img; 139 } 140}