org.apache.fop.afp.modca.ImageDataDescriptor 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: ImageDataDescriptor.java 985537 2010-08-14 17:17:00Z jeremias $ */

package org.apache.fop.afp.modca;

import java.io.IOException;
import java.io.OutputStream;

import org.apache.fop.afp.util.BinaryUtils;

/**
 * ImageDataDescriptor
 */
public class ImageDataDescriptor extends AbstractDescriptor {

    /** function set fs10 */
    public static final byte FUNCTION_SET_FS10 = 0x0A;
    /** function set fs11 */
    public static final byte FUNCTION_SET_FS11 = 0x0B;
    /** function set fs45 */
    public static final byte FUNCTION_SET_FS45 = 45;

    private byte functionSet = FUNCTION_SET_FS11; // FCNSET = IOCA FS 11

    /**
     * Constructor for a ImageDataDescriptor for the specified
     * resolution, width and height.
     *
     * @param width The width of the image.
     * @param height The height of the height.
     * @param widthRes The horizontal resolution of the image.
     * @param heightRes The vertical resolution of the image.
     */
    public ImageDataDescriptor(int width, int height, int widthRes, int heightRes) {
        super(width, height, widthRes, heightRes);
    }

    /**
     * Sets the IOCA function set to be used.
     * @param functionSet the function set (0x0A for FS 10, 0x0B for FS 11, etc.)
     */
    public void setFunctionSet(byte functionSet) {
        this.functionSet = functionSet;
    }

    /** {@inheritDoc} */
    public void writeToStream(OutputStream os) throws IOException {
        byte[] data = new byte[22];
        copySF(data, Type.DESCRIPTOR, Category.IMAGE);

        // SF length
        byte[] len = BinaryUtils.convert(data.length - 1, 2);
        data[1] = len[0];
        data[2] = len[1];

        byte[] x = BinaryUtils.convert(widthRes, 2);
        data[10] = x[0];
        data[11] = x[1];

        byte[] y = BinaryUtils.convert(heightRes, 2);
        data[12] = y[0];
        data[13] = y[1];

        byte[] w = BinaryUtils.convert(width, 2);
        data[14] = w[0];
        data[15] = w[1];

        byte[] h = BinaryUtils.convert(height, 2);
        data[16] = h[0];
        data[17] = h[1];

        //IOCA Function Set Field
        data[18] = (byte)0xF7; // ID = Set IOCA Function Set
        data[19] = 0x02; // Length
        data[20] = 0x01; // Category = Function set identifier
        data[21] = functionSet;

        os.write(data);
    }
}