/*
* Created on 01 feb 2017
* Copyright 2015 by Andrea Vacondio (andrea.vacondio@gmail.com).
* This file is part of Sejda.
*
* Sejda is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Sejda 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 Sejda. If not, see <http://www.gnu.org/licenses/>.
*/
package org.sejda.core.writer.imageio;
import java.awt.image.RenderedImage;
import javax.imageio.ImageTypeSpecifier;
import javax.imageio.ImageWriteParam;
import javax.imageio.metadata.IIOMetadata;
import javax.imageio.plugins.jpeg.JPEGImageWriteParam;
import org.sejda.model.parameter.image.PdfToJpegParameters;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.w3c.dom.Element;
/**
* JPEG image writer using ImageIO
*
* @author Andrea Vacondio
*/
public class JpegImageWriter extends SingleImageWriter<PdfToJpegParameters> {
private static final Logger LOG = LoggerFactory.getLogger(JpegImageWriter.class);
public JpegImageWriter() {
super("jpeg");
}
@Override
ImageWriteParam newImageWriterParams(PdfToJpegParameters params) {
JPEGImageWriteParam param = new JPEGImageWriteParam(writer.getLocale());
param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
param.setCompressionQuality((float) params.getQuality() / 100);
return param;
}
@Override
public IIOMetadata newImageMetadata(RenderedImage image, PdfToJpegParameters params, ImageWriteParam writerParams) {
// new metadatad
IIOMetadata imageMetaData = null;
try {
imageMetaData = writer.getDefaultImageMetadata(new ImageTypeSpecifier(image), writerParams);
Element tree = (Element) imageMetaData.getAsTree("javax_imageio_jpeg_image_1.0");
Element jfif = (Element) tree.getElementsByTagName("app0JFIF").item(0);
jfif.setAttribute("Xdensity", Integer.toString(params.getResolutionInDpi()));
jfif.setAttribute("Ydensity", Integer.toString(params.getResolutionInDpi()));
jfif.setAttribute("resUnits", "1");
imageMetaData.setFromTree("javax_imageio_jpeg_image_1.0", tree);
} catch (Exception e1) {
LOG.warn("Failed to set DPI for image, metadata manipulation failed", e1);
}
return imageMetaData;
}
}