/*
* 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: ASCII85Filter.java 1296526 2012-03-03 00:18:45Z gadams $ */
package org.apache.fop.pdf;
import java.io.IOException;
import java.io.OutputStream;
import org.apache.xmlgraphics.util.io.ASCII85OutputStream;
/**
* PDF Filter for ASCII85.
* This applies a filter to a pdf stream that converts
* the data to ASCII.
*/
public class ASCII85Filter extends PDFFilter {
/**
* Get the PDF name of this filter.
*
* @return the name of the filter to be inserted into the PDF
*/
public String getName() {
return "/ASCII85Decode";
}
/**
* {@inheritDoc}
*/
public boolean isASCIIFilter() {
return true;
}
/**
* Get the decode parameters.
*
* @return always null
*/
public PDFObject getDecodeParms() {
return null;
}
/**
* {@inheritDoc}
*/
public OutputStream applyFilter(OutputStream out) throws IOException {
if (isApplied()) {
return out;
} else {
return new ASCII85OutputStream(out);
}
}
}