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/*
* JasperReports - Free Java Reporting Library.
* Copyright (C) 2001 - 2016 TIBCO Software Inc. All rights reserved.
* http://www.jaspersoft.com
*
* Unless you have purchased a commercial license agreement from Jaspersoft,
* the following license terms apply:
*
* This program is part of JasperReports.
*
* JasperReports 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 3 of the License, or
* (at your option) any later version.
*
* JasperReports 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 JasperReports. If not, see .
*/
package net.sf.jasperreports.components.barcode4j;
import java.awt.Color;
import java.io.ByteArrayOutputStream;
import java.util.HashMap;
import java.util.Map;
import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.krysalis.barcode4j.output.BarcodeCanvasSetupException;
import org.krysalis.barcode4j.output.svg.SVGCanvasProvider;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import com.google.zxing.EncodeHintType;
import com.google.zxing.WriterException;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
import com.google.zxing.qrcode.encoder.ByteMatrix;
import com.google.zxing.qrcode.encoder.Encoder;
import com.google.zxing.qrcode.encoder.QRCode;
import net.sf.jasperreports.engine.JRComponentElement;
import net.sf.jasperreports.engine.JRPropertiesUtil;
import net.sf.jasperreports.engine.JRRuntimeException;
import net.sf.jasperreports.engine.JRStyle;
import net.sf.jasperreports.engine.JasperReportsContext;
import net.sf.jasperreports.engine.util.JRColorUtil;
import net.sf.jasperreports.renderers.Renderable;
import net.sf.jasperreports.renderers.SimpleRenderToImageAwareDataRenderer;
/**
*
* @author Teodor Danciu ([email protected])
*/
public class QRCodeSVGImageProducer implements QRCodeImageProducer
{
public static final int DEFAULT_MARGIN = 4;//same as zxing's QRCodeWriter.QUIET_ZONE_SIZE
@Override
public Renderable createImage(
JasperReportsContext jasperReportsContext,
JRComponentElement componentElement,
QRCodeBean qrCodeBean,
String message
)
{
Map hints = new HashMap();
String encoding = JRPropertiesUtil.getInstance(jasperReportsContext).getProperty(
componentElement, QRCodeComponent.PROPERTY_QRCODE_CHARACTER_ENCODING, QRCodeComponent.PROPERTY_DEFAULT_ENCODING);
hints.put(EncodeHintType.CHARACTER_SET, encoding);
ErrorCorrectionLevel errorCorrectionLevel = qrCodeBean.getErrorCorrectionLevel().getErrorCorrectionLevel();
hints.put(EncodeHintType.ERROR_CORRECTION, errorCorrectionLevel);
ByteMatrix matrix = null;
SVGCanvasProvider provider = null;
try
{
QRCode qrCode = Encoder.encode(message, errorCorrectionLevel, hints);
matrix = qrCode.getMatrix();
provider = new SVGCanvasProvider(false, OrientationEnum.UP.getValue());
}
catch (WriterException e)
{
throw new JRRuntimeException(e);
}
catch (BarcodeCanvasSetupException e)
{
throw new JRRuntimeException(e);
}
Document svgDoc = provider.getDOM();
Element svg = svgDoc.getDocumentElement();
int codeWidth = matrix.getWidth();
int codeHeight = matrix.getHeight();
JRStyle elementStyle = componentElement.getStyle();
int elementWidth = componentElement.getWidth() - (elementStyle == null ? 0
: (elementStyle.getLineBox().getLeftPadding() + elementStyle.getLineBox().getRightPadding()));
int elementHeight = componentElement.getHeight() - (elementStyle == null ? 0
: (elementStyle.getLineBox().getTopPadding() + elementStyle.getLineBox().getBottomPadding()));
int margin = qrCodeBean.getMargin() == null ? DEFAULT_MARGIN : qrCodeBean.getMargin();
int matrixWidth = codeWidth + 2 * margin;
int matrixHeight = codeHeight + 2 * margin;
// scaling to match the image size as closely as possible so that it looks good in html.
// the resolution is taken into account because the html exporter rasterizes to a png
// that has the same size as the svg.
int resolution = JRPropertiesUtil.getInstance(jasperReportsContext).getIntegerProperty(
componentElement, BarcodeRasterizedImageProducer.PROPERTY_RESOLUTION, 300);
int imageWidth = (int) Math.ceil(elementWidth * (resolution / 72d));
int imageHeight = (int) Math.ceil(elementHeight * (resolution / 72d));
double horizontalScale = ((double) imageWidth) / matrixWidth;
double verticalScale = ((double) imageHeight) / matrixHeight;
// we are scaling with integer units, not considering fractional coordinates for now
int scale = Math.max(1, (int) Math.min(Math.ceil(horizontalScale), Math.ceil(verticalScale)));
int qrWidth = scale * matrixWidth;
int qrHeight = scale * matrixHeight;
// scaling again because of the integer units
double qrScale = Math.max(1d, Math.max(((double) qrWidth) / imageWidth, ((double) qrHeight) / imageHeight));
int svgWidth = (int) Math.ceil(qrScale * imageWidth);
int svgHeight = (int) Math.ceil(qrScale * imageHeight);
svg.setAttribute("width", String.valueOf(svgWidth));
svg.setAttribute("height",String.valueOf(svgHeight));
svg.setAttribute("viewBox", "0 0 " + svgWidth + " " + svgHeight);
int xOffset = Math.max(0, (svgWidth - qrWidth) / 2);
int yOffset = Math.max(0, (svgHeight - qrHeight) / 2);
Color color = componentElement.getForecolor();
String fill = "#" + JRColorUtil.getColorHexa(color);
String fillOpacity = color.getAlpha() < 255 ? Float.toString(((float) color.getAlpha()) / 255) : null;
String rectangleSize = Integer.toString(scale);
for (int x = 0; x < codeWidth; x++) {
for (int y = 0; y < codeHeight; y++) {
if (matrix.get(x,y) == 1) {
Element element = svgDoc.createElementNS(svg.getNamespaceURI(), "rect");
element.setAttribute("x", String.valueOf(xOffset + scale * (x + margin)));
element.setAttribute("y", String.valueOf(yOffset + scale * (y + margin)));
element.setAttribute("width", rectangleSize);
element.setAttribute("height", rectangleSize);
element.setAttribute("fill", fill);
if (fillOpacity != null) {
element.setAttribute("fill-opacity", fillOpacity);
}
svgDoc.getFirstChild().appendChild(element);
}
}
}
Source source = new DOMSource(svgDoc);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
Result output = new StreamResult(baos);
try
{
Transformer transformer = TransformerFactory.newInstance()
.newTransformer();
transformer.transform(source, output);
}
catch (TransformerException e)
{
throw new JRRuntimeException(e);
}
return SimpleRenderToImageAwareDataRenderer.getInstance(baos.toByteArray());
}
}
