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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.
*/
/* $Id$ */
package org.apache.fop.render.rtf;
import org.apache.batik.transcoder.TranscoderException;
import org.apache.batik.transcoder.TranscoderInput;
import org.apache.batik.transcoder.TranscoderOutput;
import org.apache.batik.transcoder.image.JPEGTranscoder;
import org.apache.commons.io.output.ByteArrayOutputStream;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.fop.image.XMLImage;
/**
* Helper class for converting SVG to bitmap images.
*/
public final class SVGConverter {
/** logger instance */
private static Log log = LogFactory.getLog(SVGConverter.class);
/**
* Constructor is private, because it's just a utility class.
*/
private SVGConverter() {
}
/**
* Converts a SVG image to a JPEG bitmap.
* @param image the SVG image
* @return a byte array containing the JPEG image
*/
public static byte[] convertToJPEG(XMLImage image) {
JPEGTranscoder transcoder = new JPEGTranscoder();
/* TODO Disabled to avoid side-effect due to the mixing of source and target resolutions
* This should be reenabled when it has been determined how exactly to handle this
transcoder.addTranscodingHint(ImageTranscoder.KEY_PIXEL_UNIT_TO_MILLIMETER,
new Float(25.4f / 300)); //300dpi should be enough for now.
*/
transcoder.addTranscodingHint(JPEGTranscoder.KEY_QUALITY, new Float(0.9f));
TranscoderInput input = new TranscoderInput(image.getDocument());
ByteArrayOutputStream baout = new ByteArrayOutputStream(16384);
TranscoderOutput output = new TranscoderOutput(baout);
try {
transcoder.transcode(input, output);
return baout.toByteArray();
} catch (TranscoderException e) {
log.error(e);
return null;
}
}
}
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