/*
* 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: ImageEncoderCCITTFax.java 679326 2008-07-24 09:35:34Z vhennebert $ */
package org.apache.fop.render.ps;
import java.io.IOException;
import java.io.OutputStream;
import org.apache.xmlgraphics.image.codec.tiff.TIFFImage;
import org.apache.xmlgraphics.image.loader.impl.ImageRawCCITTFax;
import org.apache.xmlgraphics.ps.ImageEncoder;
import org.apache.xmlgraphics.ps.PSDictionary;
/**
* ImageEncoder implementation for CCITT encoded images.
*/
public class ImageEncoderCCITTFax implements ImageEncoder {
private final ImageRawCCITTFax ccitt;
/**
* Main constructor.
* @param ccitt the CCITT encoded image
*/
public ImageEncoderCCITTFax(ImageRawCCITTFax ccitt) {
this.ccitt = ccitt;
}
/** {@inheritDoc} */
public void writeTo(OutputStream out) throws IOException {
ccitt.writeTo(out);
}
/** {@inheritDoc} */
public String getImplicitFilter() {
PSDictionary dict = new PSDictionary();
dict.put("/Columns", new Integer(ccitt.getSize().getWidthPx()));
int compression = ccitt.getCompression();
switch (compression) {
case TIFFImage.COMP_FAX_G3_1D :
dict.put("/K", new Integer(0));
break;
case TIFFImage.COMP_FAX_G3_2D :
dict.put("/K", new Integer(1));
break;
case TIFFImage.COMP_FAX_G4_2D :
dict.put("/K", new Integer(-1));
break;
default:
throw new IllegalStateException(
"Invalid compression scheme: " + compression);
}
return dict.toString() + " /CCITTFaxDecode";
}
}