pdseparation.java

非常有用的操作pdf文件的java源码

/**
 * Copyright (c) 2004, www.pdfbox.org
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 3. Neither the name of pdfbox; nor the names of its
 *    contributors may be used to endorse or promote products derived from this
 *    software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 * http://www.pdfbox.org
 *
 */
package org.pdfbox.pdmodel.graphics.color;

import java.awt.color.ColorSpace;
import java.awt.image.ColorModel;

import java.io.IOException;

import org.pdfbox.cos.COSArray;
import org.pdfbox.cos.COSBase;
import org.pdfbox.cos.COSName;
import org.pdfbox.pdmodel.common.function.PDFunction;

/**
 * This class represents a Separation color space.
 *
 * @author <a href="mailto:[e-mail]">Ben Litchfield</a>
 * @version $Revision: 1.4 $
 */
public class PDSeparation extends PDColorSpace
{
    /**
     * The name of this color space.
     */
    public static final String NAME = "Separation";

    private COSArray array;

    /**
     * Constructor.
     */
    public PDSeparation()
    {
        array = new COSArray();
        array.add( COSName.getPDFName( NAME ) );
        array.add( COSName.getPDFName( "" ) );
    }

    /**
     * Constructor.
     *
     * @param separation The array containing all separation information.
     */
    public PDSeparation( COSArray separation )
    {
        array = separation;
    }

    /**
     * This will return the name of the color space.  For a PDSeparation object
     * this will always return "Separation"
     *
     * @return The name of the color space.
     */
    public String getName()
    {
        return NAME;
    }

    /**
     * This will get the number of components that this color space is made up of.
     *
     * @return The number of components in this color space.
     *
     * @throws IOException If there is an error getting the number of color components.
     */
    public int getNumberOfComponents() throws IOException
    {
        return 1;
    }

    /**
     * Create a Java colorspace for this colorspace.
     *
     * @return A color space that can be used for Java AWT operations.
     *
     * @throws IOException If there is an error creating the color space.
     */
    public ColorSpace createColorSpace() throws IOException
    {
        throw new IOException( "Not implemented" );
    }
    
    /**
     * Create a Java color model for this colorspace.
     *
     * @param bpc The number of bits per component.
     * 
     * @return A color model that can be used for Java AWT operations.
     *
     * @throws IOException If there is an error creating the color model.
     */
    public ColorModel createColorModel( int bpc ) throws IOException
    {
        throw new IOException( "Not implemented" );
    }

    /**
     * This will get the separation name.
     *
     * @return The name in the separation.
     */
    public String getColorantName()
    {
        COSName name = (COSName)array.getObject( 1 );
        return name.getName();
    }

    /**
     * This will set the separation name.
     *
     * @param name The separation name.
     */
    public void setColorantName( String name )
    {
        array.set( 1, COSName.getPDFName( name ) );
    }

    /**
     * This will get the alternate color space for this separation.
     *
     * @return The alternate color space.
     *
     * @throws IOException If there is an error getting the alternate color space.
     */
    public PDColorSpace getAlternateColorSpace() throws IOException
    {
        COSBase alternate = array.getObject( 2 );
        return PDColorSpaceFactory.createColorSpace( alternate );
    }

    /**
     * This will set the alternate color space.
     *
     * @param cs The alternate color space.
     */
    public void setAlternateColorSpace( PDColorSpace cs )
    {
        COSBase space = null;
        if( cs != null )
        {
            space = cs.getCOSObject();
        }
        array.set( 2, space );
    }

    /**
     * This will get the tint transform function.
     *
     * @return The tint transform function.
     * 
     * @throws IOException If there is an error creating the PDFunction
     */
    public PDFunction getTintTransform() throws IOException
    {
        return PDFunction.create( array.get( 3 ) );
    }

    /**
     * This will set the tint transform function.
     *
     * @param tint The tint transform function.
     */
    public void setTintTransform( PDFunction tint )
    {
        array.set( 3, tint );
    }
}