My version of watermarking with iText
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.Image;
import com.itextpdf.text.Rectangle;
import com.itextpdf.text.pdf.PdfContentByte;
import com.itextpdf.text.pdf.PdfGState;
import com.itextpdf.text.pdf.PdfLayer;
import com.itextpdf.text.pdf.PdfReader;
import com.itextpdf.text.pdf.PdfStamper;
import java.io.FileOutputStream;
import java.io.IOException;
/**
*
* @author Jaakov Jalink
* Syneron Medical LTD.
*/
public class addWatermark {
public static final String inFile = "d:\\ChapterSection.pdf";
public static final String outFile = "d:\\test.pdf";
public static final String IMAGE_PRINTED = "D:\\ active stamp.png";
public static void main(String[] args) throws DocumentException,
IOException {
addWatermarkImg(inFile, outFile, IMAGE_PRINTED, 1, 100, true, true,
true, 10, 10, 0.4f, true, 50, 100);
}
/**
* <p> independent function to add watermark to a PDF file </p>
*
* @param inFilefName
* @param outFileName
* @param imgFileName
* @param startPage
* @param endPage
* @param onTop
* @param onScreen
* @param onPrint
* @param posX
* @param posY
* @param Opacity
* @param scaleOrAbsolute - true if the sizes are scale, false for absolute
size
* @param sizeX
* @param sizeY
*
* @throws IOException
* @throws DocumentException
*/
public static void addWatermarkImg(String inFilefName, String outFileName,
String imgFileName, int startPage, int endPage,
boolean onTop, boolean onScreen, boolean onPrint,
float posX, float posY, float Opacity,
boolean scaleOrAbsolute, float sizeX, float sizeY) throws
IOException, DocumentException {
//open the files
PdfReader reader = new PdfReader(inFilefName);
PdfStamper stamper = new PdfStamper(reader, new
FileOutputStream(outFileName));
Image image1 = Image.getInstance(imgFileName);
if (scaleOrAbsolute)
image1.scalePercent(sizeX, sizeY);
else
image1.scaleAbsolute(sizeX, sizeY);
//add watermark layer
PdfLayer wmLayer = new PdfLayer("WaterMark", stamper.getWriter());
wmLayer.setOnPanel(true);
//set layer parameters
wmLayer.setPrint("print", true);
wmLayer.setOn(onScreen);
wmLayer.setView(onScreen);
//Prepare transperancy
PdfGState transparent = new PdfGState();
transparent.setStrokeOpacity(Opacity);
transparent.setFillOpacity(Opacity);
PdfContentByte cb;
int toPage = Math.min(endPage, stamper.getReader().getNumberOfPages());
for (int i = startPage; i < toPage; i++) {
if (onTop)
cb = stamper.getOverContent(i);
else
cb = stamper.getUnderContent(i);
Rectangle rectangle =
stamper.getReader().getPageSizeWithRotation(i);
cb.beginLayer(wmLayer);
cb.setGState(transparent); //set block trasparency properties
//position relative to top
float AbsoluteY = rectangle.getBottom() + (rectangle.getHeight() -
image1.getPlainHeight() - posY);
image1.setAbsolutePosition(posX, AbsoluteY);
cb.addImage(image1);
cb.endLayer();
}
stamper.close();
}
}
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