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iText, a free Java-PDF library
/*
* $Id: BarcodeQRCode.java 6683 2015-01-09 13:40:05Z asubach $
*
* This file is part of the iText (R) project.
* Copyright (c) 1998-2014 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: [email protected]
*/
package com.itextpdf.text.pdf;
import com.itextpdf.text.pdf.qrcode.EncodeHintType;
import com.itextpdf.text.pdf.qrcode.WriterException;
import com.itextpdf.text.pdf.qrcode.ByteMatrix;
import com.itextpdf.text.pdf.qrcode.QRCodeWriter;
import com.itextpdf.text.BadElementException;
import com.itextpdf.text.ExceptionConverter;
import com.itextpdf.text.Image;
import com.itextpdf.text.pdf.codec.CCITTG4Encoder;
import java.util.Map;
/**
* A QRCode implementation based on the zxing code.
* @author Paulo Soares
* @since 5.0.2
*/
public class BarcodeQRCode {
ByteMatrix bm;
/**
* Creates the QR barcode. The barcode is always created with the smallest possible size and is then stretched
* to the width and height given. Set the width and height to 1 to get an unscaled barcode.
* @param content the text to be encoded
* @param width the barcode width
* @param height the barcode height
* @param hints modifiers to change the way the barcode is create. They can be EncodeHintType.ERROR_CORRECTION
* and EncodeHintType.CHARACTER_SET. For EncodeHintType.ERROR_CORRECTION the values can be ErrorCorrectionLevel.L, M, Q, H.
* For EncodeHintType.CHARACTER_SET the values are strings and can be Cp437, Shift_JIS and ISO-8859-1 to ISO-8859-16.
* You can also use UTF-8, but correct behaviour is not guaranteed as Unicode is not supported in QRCodes.
* The default value is ISO-8859-1.
* @throws WriterException
*/
public BarcodeQRCode(String content, int width, int height, Map hints) {
try {
QRCodeWriter qc = new QRCodeWriter();
bm = qc.encode(content, width, height, hints);
}
catch (WriterException ex) {
throw new ExceptionConverter(ex);
}
}
private byte[] getBitMatrix() {
int width = bm.getWidth();
int height = bm.getHeight();
int stride = (width + 7) / 8;
byte[] b = new byte[stride * height];
byte[][] mt = bm.getArray();
for (int y = 0; y < height; ++y) {
byte[] line = mt[y];
for (int x = 0; x < width; ++x) {
if (line[x] != 0) {
int offset = stride * y + x / 8;
b[offset] |= (byte)(0x80 >> (x % 8));
}
}
}
return b;
}
/** Gets an Image with the barcode.
* @return the barcode Image
* @throws BadElementException on error
*/
public Image getImage() throws BadElementException {
byte[] b = getBitMatrix();
byte g4[] = CCITTG4Encoder.compress(b, bm.getWidth(), bm.getHeight());
return Image.getInstance(bm.getWidth(), bm.getHeight(), false, Image.CCITTG4, Image.CCITT_BLACKIS1, g4, null);
}
// AWT related methods (remove this if you port to Android / GAE)
/** Creates a java.awt.Image.
* @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 width = bm.getWidth();
int height = bm.getHeight();
int pix[] = new int[width * height];
byte[][] mt = bm.getArray();
for (int y = 0; y < height; ++y) {
byte[] line = mt[y];
for (int x = 0; x < width; ++x) {
pix[y * width + x] = line[x] == 0 ? f : g;
}
}
java.awt.Image img = canvas.createImage(new java.awt.image.MemoryImageSource(width, height, pix, 0, width));
return img;
}
}