org.apache.fop.render.ps.ImageEncoderCCITTFax Maven / Gradle / Ivy

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Tool to convert CSV and XLS to XML, to transform XML and to convert XML to CSV, HTML, other text files, PDF etc., useful as command line tool and integrated in other projects.

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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: ImageEncoderCCITTFax.java 1297404 2012-03-06 10:17:54Z 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";
    }
}