org.apache.xmlgraphics.image.loader.impl.ImageLoaderRawPNG Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* $Id: ImageLoaderRawPNG.java 1843559 2018-10-11 14:59:17Z ssteiner $ */
// Original author: Matthias Reichenbacher
package org.apache.xmlgraphics.image.loader.impl;
import java.io.IOException;
import java.util.Map;
import javax.imageio.stream.ImageInputStream;
import javax.xml.transform.Source;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.xmlgraphics.image.codec.util.ImageInputStreamSeekableStreamAdapter;
import org.apache.xmlgraphics.image.codec.util.SeekableStream;
import org.apache.xmlgraphics.image.loader.Image;
import org.apache.xmlgraphics.image.loader.ImageException;
import org.apache.xmlgraphics.image.loader.ImageFlavor;
import org.apache.xmlgraphics.image.loader.ImageInfo;
import org.apache.xmlgraphics.image.loader.ImageSessionContext;
import org.apache.xmlgraphics.image.loader.util.ImageUtil;
import org.apache.xmlgraphics.io.XmlSourceUtil;
import org.apache.xmlgraphics.util.MimeConstants;
public class ImageLoaderRawPNG extends AbstractImageLoader {
/** logger */
protected static final Log log = LogFactory.getLog(ImageLoaderRawPNG.class);
/**
* Main constructor.
*/
public ImageLoaderRawPNG() {
}
/** {@inheritDoc} */
public ImageFlavor getTargetFlavor() {
return ImageFlavor.RAW_PNG;
}
/** {@inheritDoc} */
public Image loadImage(ImageInfo info, Map hints, ImageSessionContext session) throws ImageException,
IOException {
if (!MimeConstants.MIME_PNG.equals(info.getMimeType())) {
throw new IllegalArgumentException("ImageInfo must be from a image with MIME type: "
+ MimeConstants.MIME_PNG);
}
Source src = session.needSource(info.getOriginalURI());
ImageInputStream in = ImageUtil.needImageInputStream(src);
// Remove streams as we do things with them at some later time.
XmlSourceUtil.removeStreams(src);
SeekableStream seekStream = new ImageInputStreamSeekableStreamAdapter(in);
PNGFile im = new PNGFile(seekStream, info.getOriginalURI());
ImageRawPNG irpng = im.getImageRawPNG(info);
return irpng;
}
/** {@inheritDoc} */
public int getUsagePenalty() {
// since this image loader does not handle all kinds of PNG images then we add some penalty to it
// so that it is not chosen by default; instead, users need to give it a negative penalty in
// fop.xconf so that it is used
return 1000;
}
}