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* Copyright (c) 2005, www.pdfbox.org
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package org.pdfbox.util.operator.pagedrawer;
import java.awt.Dimension;
import java.awt.Graphics2D;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.List;
import java.util.Map;
import org.pdfbox.cos.COSName;
import org.pdfbox.cos.COSStream;
import org.pdfbox.pdfviewer.PageDrawer;
import org.pdfbox.pdmodel.PDPage;
import org.pdfbox.pdmodel.PDResources;
import org.pdfbox.pdmodel.graphics.xobject.PDXObject;
import org.pdfbox.pdmodel.graphics.xobject.PDXObjectForm;
import org.pdfbox.pdmodel.graphics.xobject.PDXObjectImage;
import org.pdfbox.util.Matrix;
import org.pdfbox.util.PDFOperator;
import org.pdfbox.util.operator.OperatorProcessor;
/**
* Implementation of content stream operator for page drawer.
*
* @author <a href="mailto:ben@benlitchfield.com">Ben Litchfield</a>
* @version $Revision: 1.4 $
*/
public class Invoke extends OperatorProcessor
{
/**
* process : re : append rectangle to path.
* @param operator The operator that is being executed.
* @param arguments List
* @throws IOException If there is an error invoking the sub object.
*/
public void process(PDFOperator operator, List arguments) throws IOException
{
PageDrawer drawer = (PageDrawer)context;
PDPage page = drawer.getPage();
Dimension pageSize = drawer.getPageSize();
Graphics2D graphics = drawer.getGraphics();
COSName objectName = (COSName)arguments.get( 0 );
Map xobjects = drawer.getResources().getXObjects();
PDXObject xobject = (PDXObject)xobjects.get( objectName.getName() );
if( xobject instanceof PDXObjectImage )
{
PDXObjectImage image = (PDXObjectImage)xobject;
try
{
BufferedImage awtImage = image.getRGBImage();
Matrix ctm = drawer.getGraphicsState().getCurrentTransformationMatrix();
int width = awtImage.getWidth();
int height = awtImage.getHeight();
double rotationInRadians =(page.findRotation() * Math.PI)/180;
AffineTransform rotation = new AffineTransform();
rotation.setToRotation( rotationInRadians );
AffineTransform rotationInverse = rotation.createInverse();
Matrix rotationInverseMatrix = new Matrix();
rotationInverseMatrix.setFromAffineTransform( rotationInverse );
Matrix rotationMatrix = new Matrix();
rotationMatrix.setFromAffineTransform( rotation );
Matrix unrotatedCTM = ctm.multiply( rotationInverseMatrix );
Matrix scalingParams = unrotatedCTM.extractScaling();
Matrix scalingMatrix = Matrix.getScaleInstance(1f/width,1f/height);
scalingParams = scalingParams.multiply( scalingMatrix );
Matrix translationParams = unrotatedCTM.extractTranslating();
Matrix translationMatrix = null;
int pageRotation = page.findRotation();
if( pageRotation == 0 )
{
translationParams.setValue(2,1, -translationParams.getValue( 2,1 ));
translationMatrix = Matrix.getTranslatingInstance(
0, (float)pageSize.getHeight()-height*scalingParams.getYScale() );
}
else if( pageRotation == 90 )
{
translationMatrix = Matrix.getTranslatingInstance( 0, (float)pageSize.getHeight() );
}
else
{
//TODO need to figure out other cases
}
translationParams = translationParams.multiply( translationMatrix );
AffineTransform at = new AffineTransform(
scalingParams.getValue( 0,0), 0,
0, scalingParams.getValue( 1, 1),
translationParams.getValue(2,0), translationParams.getValue( 2,1 )
);
//at.setToTranslation( pageSize.getHeight()-ctm.getValue(2,0),ctm.getValue(2,1) );
//at.setToScale( ctm.getValue(0,0)/width, ctm.getValue(1,1)/height);
//at.setToRotation( (page.findRotation() * Math.PI)/180 );
//AffineTransform rotation = new AffineTransform();
//rotation.rotate( (90*Math.PI)/180);
/*
// The transformation should be done
// 1 - Translation
// 2 - Rotation
// 3 - Scale or Skew
AffineTransform at = new AffineTransform();
// Translation
at = new AffineTransform();
//at.setToTranslation((double)ctm.getValue(0,0),
// (double)ctm.getValue(0,1));
// Rotation
//AffineTransform toAdd = new AffineTransform();
toAdd.setToRotation(1.5705);
toAdd.setToRotation(ctm.getValue(2,0)*(Math.PI/180));
at.concatenate(toAdd);
*/
// Scale / Skew?
//toAdd.setToScale(1, 1);
//at.concatenate(toAdd);
graphics.drawImage( awtImage, at, null );
}
catch( Exception e )
{
e.printStackTrace();
}
}
else if(xobject instanceof PDXObjectForm)
{
PDXObjectForm form = (PDXObjectForm)xobject;
COSStream invoke = (COSStream)form.getCOSObject();
PDResources pdResources = form.getResources();
if(pdResources == null)
{
pdResources = page.findResources();
}
getContext().processSubStream( page, pdResources, invoke );
}
else
{
//unknown xobject type
}
//invoke named object.
}
}