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package org.pdfbox.pdmodel.graphics.color;
import org.pdfbox.cos.COSArray;
import org.pdfbox.cos.COSBase;
import org.pdfbox.cos.COSDictionary;
import org.pdfbox.cos.COSFloat;
import org.pdfbox.cos.COSName;
import org.pdfbox.cos.COSNumber;
import java.awt.color.ColorSpace;
import java.awt.image.ColorModel;
import java.io.IOException;
/**
* This class represents a Cal Gray color space.
*
* @author <a href="mailto:ben@benlitchfield.com">Ben Litchfield</a>
* @version $Revision: 1.5 $
*/
public class PDCalGray extends PDColorSpace
{
/**
* The name of this color space.
*/
public static final String NAME = "CalGray";
private COSArray array;
private COSDictionary dictionary;
/**
* Constructor.
*/
public PDCalGray()
{
array = new COSArray();
dictionary = new COSDictionary();
array.add( COSName.getPDFName( NAME ) );
array.add( dictionary );
}
/**
* Constructor with array.
*
* @param gray The underlying color space.
*/
public PDCalGray( COSArray gray )
{
array = gray;
dictionary = (COSDictionary)array.getObject( 1 );
}
/**
* 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;
}
/**
* This will return the name of the color space.
*
* @return The name of the color space.
*/
public String getName()
{
return NAME;
}
/**
* 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" );
}
/**
* Convert this standard java object to a COS object.
*
* @return The cos object that matches this Java object.
*/
public COSBase getCOSObject()
{
return array;
}
/**
* This will get the gamma value. If none is present then the default of 1
* will be returned.
*
* @return The gamma value.
*/
public float getGamma()
{
float retval = 1.0f;
COSNumber gamma = (COSNumber)dictionary.getDictionaryObject( COSName.getPDFName( "Gamma" ) );
if( gamma != null )
{
retval = gamma.floatValue();
}
return retval;
}
/**
* Set the gamma value.
*
* @param value The new gamma value.
*/
public void setGamma( float value )
{
dictionary.setItem( COSName.getPDFName( "Gamma" ), new COSFloat( value ) );
}
/**
* This will return the whitepoint tristimulus. As this is a required field
* this will never return null. A default of 1,1,1 will be returned if the
* pdf does not have any values yet.
*
* @return The whitepoint tristimulus.
*/
public PDTristimulus getWhitepoint()
{
COSArray wp = (COSArray)dictionary.getDictionaryObject( COSName.getPDFName( "WhitePoint" ) );
if( wp == null )
{
wp = new COSArray();
wp.add( new COSFloat( 1.0f ) );
wp.add( new COSFloat( 1.0f ) );
wp.add( new COSFloat( 1.0f ) );
dictionary.setItem( COSName.getPDFName( "WhitePoint" ), wp );
}
return new PDTristimulus( wp );
}
/**
* This will set the whitepoint tristimulus. As this is a required field
* this null should not be passed into this function.
*
* @param wp The whitepoint tristimulus.
*/
public void setWhitepoint( PDTristimulus wp )
{
COSBase wpArray = wp.getCOSObject();
if( wpArray != null )
{
dictionary.setItem( COSName.getPDFName( "WhitePoint" ), wpArray );
}
}
/**
* This will return the BlackPoint tristimulus. This is an optional field but
* has defaults so this will never return null.
* A default of 0,0,0 will be returned if the pdf does not have any values yet.
*
* @return The blackpoint tristimulus.
*/
public PDTristimulus getBlackPoint()
{
COSArray bp = (COSArray)dictionary.getDictionaryObject( COSName.getPDFName( "BlackPoint" ) );
if( bp == null )
{
bp = new COSArray();
bp.add( new COSFloat( 0.0f ) );
bp.add( new COSFloat( 0.0f ) );
bp.add( new COSFloat( 0.0f ) );
dictionary.setItem( COSName.getPDFName( "BlackPoint" ), bp );
}
return new PDTristimulus( bp );
}
/**
* This will set the BlackPoint tristimulus. As this is a required field
* this null should not be passed into this function.
*
* @param bp The BlackPoint tristimulus.
*/
public void setBlackPoint( PDTristimulus bp )
{
COSBase bpArray = null;
if( bp != null )
{
bpArray = bp.getCOSObject();
}
dictionary.setItem( COSName.getPDFName( "BlackPoint" ), bpArray );
}
}