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package org.pdfbox.pdmodel.graphics.color;
import org.pdfbox.cos.COSArray;
import org.pdfbox.cos.COSBase;
import org.pdfbox.cos.COSInteger;
import org.pdfbox.cos.COSFloat;
import org.pdfbox.cos.COSName;
import org.pdfbox.cos.COSNumber;
import org.pdfbox.cos.COSStream;
import org.pdfbox.pdmodel.PDDocument;
import org.pdfbox.pdmodel.common.COSArrayList;
import org.pdfbox.pdmodel.common.PDRange;
import org.pdfbox.pdmodel.common.PDStream;
import java.awt.Transparency;
import java.awt.color.ColorSpace;
import java.awt.color.ICC_ColorSpace;
import java.awt.color.ICC_Profile;
import java.awt.image.ColorModel;
import java.awt.image.ComponentColorModel;
import java.awt.image.DataBuffer;
import java.io.InputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
/**
* This class represents a ICC profile color space.
*
* @author <a href="mailto:ben@benlitchfield.com">Ben Litchfield</a>
* @version $Revision: 1.6 $
*/
public class PDICCBased extends PDColorSpace
{
/**
* The name of this color space.
*/
public static final String NAME = "ICCBased";
private COSArray array;
private PDStream stream;
/**
* Default constructor, creates empty stream.
*
* @param doc The document to store the icc data.
*/
public PDICCBased( PDDocument doc )
{
array = new COSArray();
array.add( COSName.getPDFName( NAME ) );
array.add( new PDStream( doc ) );
}
/**
* Constructor.
*
* @param iccArray The ICC stream object.
*/
public PDICCBased( COSArray iccArray )
{
array = iccArray;
stream = new PDStream( (COSStream)iccArray.getObject( 1 ) );
}
/**
* This will return the name of the color space.
*
* @return The name of the color space.
*/
public String getName()
{
return NAME;
}
/**
* Convert this standard java object to a COS object.
*
* @return The cos object that matches this Java object.
*/
public COSBase getCOSObject()
{
return array;
}
/**
* Get the pd stream for this icc color space.
*
* @return Get the stream for this icc based color space.
*/
public PDStream getPDStream()
{
return stream;
}
/**
* 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
{
InputStream profile = null;
ColorSpace cSpace = null;
try
{
profile = stream.createInputStream();
ICC_Profile iccProfile = ICC_Profile.getInstance( profile );
cSpace = new ICC_ColorSpace( iccProfile );
}
finally
{
if( profile != null )
{
profile.close();
}
}
return cSpace;
}
/**
* 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
{
int[] nbBits = { bpc, bpc, bpc };
ComponentColorModel componentColorModel =
new ComponentColorModel( createColorSpace(),
nbBits,
false,
false,
Transparency.OPAQUE,
DataBuffer.TYPE_BYTE );
return componentColorModel;
}
/**
* This will return the number of color components. As of PDF 1.4 this will
* be 1,3,4.
*
* @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
{
COSNumber n = (COSNumber)stream.getStream().getDictionaryObject( COSName.getPDFName( "N" ) );
return n.intValue();
}
/**
* This will set the number of color components.
*
* @param n The number of color components.
*/
public void setNumberOfComponents( int n )
{
stream.getStream().setItem( COSName.getPDFName( "N" ), new COSInteger( n ) );
}
/**
* This will return a list of alternate color spaces(PDColorSpace) if the display application
* does not support this icc stream.
*
* @return A list of alternate color spaces.
*
* @throws IOException If there is an error getting the alternate color spaces.
*/
public List getAlternateColorSpaces() throws IOException
{
COSBase alternate = stream.getStream().getDictionaryObject( COSName.getPDFName( "Alternate" ) );
COSArray alternateArray = null;
if( alternate == null )
{
alternateArray = new COSArray();
int numComponents = getNumberOfComponents();
String csName = null;
if( numComponents == 1 )
{
csName = PDDeviceGray.NAME;
}
else if( numComponents == 3 )
{
csName = PDDeviceRGB.NAME;
}
else if( numComponents == 4 )
{
csName = PDDeviceCMYK.NAME;
}
else
{
throw new IOException( "Unknown colorspace number of components:" + numComponents );
}
alternateArray.add( COSName.getPDFName( csName ) );
}
else
{
if( alternate instanceof COSArray )
{
alternateArray = (COSArray)alternate;
}
else if( alternate instanceof COSName )
{
alternateArray = new COSArray();
alternateArray.add( alternate );
}
else
{
throw new IOException( "Error: expected COSArray or COSName and not " +
alternate.getClass().getName() );
}
}
List retval = new ArrayList();
for( int i=0; i<alternateArray.size(); i++ )
{
retval.add( PDColorSpaceFactory.createColorSpace( alternateArray.get( i ) ) );
}
return new COSArrayList( retval, alternateArray );
}
/**
* This will set the list of alternate color spaces. This should be a list
* of PDColorSpace objects.
*
* @param list The list of colorspace objects.
*/
public void setAlternateColorSpaces( List list )
{
COSArray altArray = null;
if( list != null )
{
altArray = COSArrayList.converterToCOSArray( list );
}
stream.getStream().setItem( COSName.getPDFName( "Alternate" ), altArray );
}
private COSArray getRangeArray( int n )
{
COSArray rangeArray = (COSArray)stream.getStream().getDictionaryObject( COSName.getPDFName( "Range" ) );
if( rangeArray == null )
{
rangeArray = new COSArray();
stream.getStream().setItem( COSName.getPDFName( "Range" ), rangeArray );
while( rangeArray.size() < n*2 )
{
rangeArray.add( new COSFloat( -100 ) );
rangeArray.add( new COSFloat( 100 ) );
}
}
return rangeArray;
}
/**
* This will get the range for a certain component number. This is will never
* return null. If it is not present then the range -100 to 100 will
* be returned.
*
* @param n The component number to get the range for.
*
* @return The range for this component.
*/
public PDRange getRangeForComponent( int n )
{
COSArray rangeArray = getRangeArray( n );
return new PDRange( rangeArray, n );
}
/**
* This will set the a range for this color space.
*
* @param range The new range for the a component.
* @param n The component to set the range for.
*/
public void setRangeForComponent( PDRange range, int n )
{
COSArray rangeArray = getRangeArray( n );
rangeArray.set( n*2, new COSFloat( range.getMin() ) );
rangeArray.set( n*2+1, new COSFloat( range.getMax() ) );
}
/**
* This will get the metadata stream for this object. Null if there is no
* metadata stream.
*
* @return The metadata stream, if it exists.
*/
public COSStream getMetadata()
{
return (COSStream)stream.getStream().getDictionaryObject( COSName.getPDFName( "Metadata" ) );
}
/**
* This will set the metadata stream that is associated with this color space.
*
* @param metadata The new metadata stream.
*/
public void setMetadata( COSStream metadata )
{
stream.getStream().setItem( COSName.getPDFName( "Metadata" ), metadata );
}
}