1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache License, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 18 /* $Id: ASCII85Filter.java 1296526 2012-03-03 00:18:45Z gadams $ */ 19 20 package org.apache.fop.pdf; 21 22 import java.io.IOException; 23 import java.io.OutputStream; 24 25 import org.apache.xmlgraphics.util.io.ASCII85OutputStream; 26 27 /** 28 * PDF Filter for ASCII85. 29 * This applies a filter to a pdf stream that converts 30 * the data to ASCII. 31 */ 32 public class ASCII85Filter extends PDFFilter { 33 34 /** 35 * Get the PDF name of this filter. 36 * 37 * @return the name of the filter to be inserted into the PDF 38 */ getName()39 public String getName() { 40 return "/ASCII85Decode"; 41 } 42 43 /** 44 * {@inheritDoc} 45 */ isASCIIFilter()46 public boolean isASCIIFilter() { 47 return true; 48 } 49 50 /** 51 * Get the decode parameters. 52 * 53 * @return always null 54 */ getDecodeParms()55 public PDFObject getDecodeParms() { 56 return null; 57 } 58 59 /** 60 * {@inheritDoc} 61 */ applyFilter(OutputStream out)62 public OutputStream applyFilter(OutputStream out) throws IOException { 63 if (isApplied()) { 64 return out; 65 } else { 66 return new ASCII85OutputStream(out); 67 } 68 } 69 70 } 71