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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
   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   See the License for the specific language governing permissions and
   limitations under the License.
package org.apache.batik.svggen;
GenericImageHandler which caches PNG images.

Paul Evenblij
$Id: 475477 2006-11-15 22:44:28Z cam $
    public static final String CACHED_PNG_PREFIX = "pngImage";
    public static final String CACHED_PNG_SUFFIX = ".png";
    protected String refPrefix = "";


imageDir directory where this handler should generate images. If null, an IllegalArgumentException is thrown.
urlRoot root for the urls that point to images created by this image handler. If null, then the url corresponding to imageDir is used.
    public CachedImageHandlerPNGEncoder(String imageDirString urlRoot)
        throws SVGGraphics2DIOException {
         = urlRoot + "/";
        setImageCacher(new ImageCacher.External(imageDir,
Uses PNG encoding.
    public void encodeImage(BufferedImage bufOutputStream os)
            throws IOException {
        ImageWriter writer = ImageWriterRegistry.getInstance()
    public int getBufferedImageType(){
        return .;
    public String getRefPrefix(){
        return ;
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