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* Copyright (c) 2004, www.pdfbox.org
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package org.pdfbox.pdmodel.common;
import org.pdfbox.cos.COSArray;
import org.pdfbox.cos.COSBase;
import org.pdfbox.cos.COSFloat;
import org.pdfbox.cos.COSNumber;
/**
* This class will be used for matrix manipulation.
*
* @author <a href="mailto:ben@benlitchfield.com">Ben Litchfield</a>
* @version $Revision: 1.3 $
*/
public class PDMatrix implements Cloneable, COSObjectable
{
private COSArray matrix;
/**
* Constructor.
*/
public PDMatrix()
{
matrix = new COSArray();
matrix.add( new COSFloat( 1.0f ) );
matrix.add( new COSFloat( 0.0f ) );
matrix.add( new COSFloat( 0.0f ) );
matrix.add( new COSFloat( 0.0f ) );
matrix.add( new COSFloat( 1.0f ) );
matrix.add( new COSFloat( 0.0f ) );
matrix.add( new COSFloat( 0.0f ) );
matrix.add( new COSFloat( 0.0f ) );
matrix.add( new COSFloat( 1.0f ) );
}
/**
* Constructor.
*
* @param array The array that describes the matrix.
*/
public PDMatrix( COSArray array )
{
matrix = array;
}
/**
* This will get the underlying array value.
*
* @return The cos object that this object wraps.
*/
public COSArray getCOSArray()
{
return matrix;
}
/**
* Convert this standard java object to a COS object.
*
* @return The cos object that matches this Java object.
*/
public COSBase getCOSObject()
{
return matrix;
}
/**
* This will get a matrix value at some point.
*
* @param row The row to get the value from.
* @param column The column to get the value from.
*
* @return The value at the row/column position.
*/
public float getValue( int row, int column )
{
return ((COSNumber)matrix.get( row*3 + column )).floatValue();
}
/**
* This will set a value at a position.
*
* @param row The row to set the value at.
* @param column the column to set the value at.
* @param value The value to set at the position.
*/
public void setValue( int row, int column, float value )
{
matrix.set( row*3+column, new COSFloat( value ) );
}
}