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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.pdf;
import java.awt.color.ColorSpace;
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.fop.pdf.CCFFilter;
import org.apache.fop.pdf.PDFDeviceColorSpace;
import org.apache.fop.pdf.PDFDictionary;
import org.apache.fop.pdf.PDFDocument;
import org.apache.fop.pdf.PDFFilter;
import org.apache.fop.pdf.PDFFilterList;
/**
* PDFImage implementation for the PDF renderer which handles raw CCITT fax images.
*/
public class ImageRawCCITTFaxAdapter extends AbstractImageAdapter {
private PDFFilter pdfFilter = null;
/**
* Creates a new PDFImage from an Image instance.
* @param image the CCITT encoded image
* @param key XObject key
*/
public ImageRawCCITTFaxAdapter(ImageRawCCITTFax image, String key) {
super(image, key);
}
/**
* Returns the {@link ImageRawCCITTFax} instance for this adapter.
* @return the image instance
*/
public ImageRawCCITTFax getImage() {
return ((ImageRawCCITTFax)this.image);
}
/** {@inheritDoc} */
public void setup(PDFDocument doc) {
pdfFilter = new CCFFilter();
pdfFilter.setApplied(true);
PDFDictionary dict = new PDFDictionary();
dict.put("Columns", this.image.getSize().getWidthPx());
int compression = getImage().getCompression();
switch (compression) {
case TIFFImage.COMP_FAX_G3_1D :
dict.put("K", 0);
break;
case TIFFImage.COMP_FAX_G3_2D :
dict.put("K", 1);
break;
case TIFFImage.COMP_FAX_G4_2D :
dict.put("K", -1);
break;
default:
throw new IllegalStateException("Invalid compression scheme: " + compression);
}
((CCFFilter)pdfFilter).setDecodeParms(dict);
super.setup(doc);
}
/** {@inheritDoc} */
public PDFDeviceColorSpace getColorSpace() {
return toPDFColorSpace(ColorSpace.getInstance(ColorSpace.CS_GRAY));
}
/** {@inheritDoc} */
public int getBitsPerComponent() {
return 1;
}
/** {@inheritDoc} */
public PDFFilter getPDFFilter() {
return pdfFilter;
}
/** {@inheritDoc} */
public void outputContents(OutputStream out) throws IOException {
getImage().writeTo(out);
}
/** {@inheritDoc} */
public String getFilterHint() {
return PDFFilterList.TIFF_FILTER;
}
}
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