Add or Remove Watermarks in PowerPoint documents using Java

Requires

In the following document, I want to add an image watermark to the first slide, and add a text watermark to the second slide. Meanwhile, I would like to know whether the watermarks can be removed at one time or not.

Note: I need to finish the functions in Java programmatically without using Microsoft PowerPoint.

Solution

Through researching many kinds of third-party libraries, I found a free API called Free Spire.Presentation for Java. It is a professional API that enables developers to create, read, write, convert and print PowerPoint documents in Java Applications without installing Microsoft PowerPoint.

Therefore, I’ll use the API to demonstrate the following demo samples. Before running codes, you need to download the product’s package and then insert Spire.Presentation.jar to IDEA. Or directly reference it by writing the following configurations in the Maven’s pom.xml file.

<repositories>
<repository>
<id>com.e-iceblue</id>
<name>e-iceblue</name>
<url>http://repo.e-iceblue.com/nexus/content/groups/public/</url>
</repository>
</repositories>
<dependencies>
<dependency>
<groupId> e-iceblue </groupId>
<artifactId>spire.presentation.free</artifactId>
<version>3.9.0</version>
</dependency>
</dependencies>

Using the code
Add Image Watermark
import com.spire.presentation.*;
import com.spire.presentation.drawing.*;
import javax.imageio.ImageIO;
import java.io.File;
public class ImageWatermark {
    public static void main(String[] args) throws Exception {
        //Create a PowerPoint document.
        Presentation presentation = new Presentation();

        //Load the file from disk.
        presentation.loadFromFile("C:\\Users\\Test1\\Desktop\\Test.pptx");

        //Get the image you want to add as image watermark.
        File file =new File("C:\\Users\\Test1\\Desktop\\pic.jpg");
        IImageData image = presentation.getImages().append(ImageIO.read(file));

        //Set the properties of SlideBackground, and then fill the image as watermark.
        presentation.getSlides().get(0).getSlideBackground().setType(BackgroundType.CUSTOM);
        presentation.getSlides().get(0).getSlideBackground().getFill().setFillType(FillFormatType.PICTURE);
        presentation.getSlides().get(0).getSlideBackground().getFill().getPictureFill().setFillType(PictureFillType.STRETCH);
        presentation.getSlides().get(0).getSlideBackground().getFill().getPictureFill().getPicture().setEmbedImage(image);

        String result = "output/addImageWatermark.pptx";
        //Save to file.
        presentation.saveToFile(result, FileFormat.PPTX_2013);
    }
}
Output

Add Text Watermark
In the process of adding text watermark, Free Spire.Presentation for Java supports setting the width, 
height, color and rotation of the text watermark. 
import com.spire.presentation.*;
import com.spire.presentation.drawing.FillFormatType;
import java.awt.*;
import java.awt.geom.Rectangle2D;
public class AddWatermark {
    public static void main(String[] args) throws Exception {
        //Load a PDF document for testing
        Presentation presentation = new Presentation();
        presentation.loadFromFile("C:\\Users\\Test1\\Desktop\\AddTextWatermark.pptx");

        //Set the width and height of watermark string
        int width= 400;
        int height= 300;
        //Define a rectangle range
        Rectangle2D.Double rect = new Rectangle2D.Double((presentation.getSlideSize().getSize().getWidth() - width) / 4,
                (presentation.getSlideSize().getSize().getHeight() - height) / 2, width, height);

        //Add a rectangle shape with a defined range
        IAutoShape shape = presentation.getSlides().get(1).getShapes().appendShape(ShapeType.RECTANGLE, rect);

        //Set the style of shape
        shape.getFill().setFillType(FillFormatType.NONE);
        shape.getShapeStyle().getLineColor().setColor(Color.white);
        shape.setRotation(-45);
        shape.getLocking().setSelectionProtection(true);
        shape.getLine().setFillType(FillFormatType.NONE);

        //Add text to shape
        shape.getTextFrame().setText("Draft");
        PortionEx textRange = shape.getTextFrame().getTextRange();

        //Set the style of the text range
        textRange.getFill().setFillType(FillFormatType.SOLID);
        textRange.getFill().getSolidColor().setColor(Color.red);
        textRange.setFontHeight(50);

        //Save the document
        presentation.saveToFile("output/addWatermark.pptx", FileFormat.PPTX_2010);
    }
}
Output

Delete text or image watermark
import com.spire.presentation.*;
import com.spire.presentation.drawing.*;
public class DeleteWatermark {
    public static void main(String[] args) throws Exception {
        //Load the sample document
        Presentation presentation = new Presentation();
        presentation.loadFromFile("C:\\Users\\Test1\\Desktop\\DeleteAllWatermark.pptx");

        //Remove text watermark by removing the shape which contains the string "Draft".
        for (int i = 0; i < presentation.getSlides().getCount(); i++)
        {
            for (int j = 0; j < presentation.getSlides().get(i).getShapes().getCount(); j++)
            {
                if (presentation.getSlides().get(i).getShapes().get(j) instanceof IAutoShape)
                {
                    IAutoShape shape = (IAutoShape)presentation.getSlides().get(i).getShapes().get(j);
                    if (shape.getTextFrame().getText().contains("Draft"))
                    {
                        presentation.getSlides().get(i).getShapes().remove(shape);
                    }
                }
            }
        }

        //Remove image watermark
        for (int i = 0; i < presentation.getSlides().getCount(); i++)
        {
            presentation.getSlides().get(i).getSlideBackground().getFill().setFillType(FillFormatType.NONE);
        }

        //Save to file.
        presentation.saveToFile("output/deleteWatermark.pptx", FileFormat.PPTX_2013);
    }
}
Conclusion
After running the code snippets below, we can successfully add or delete text or image watermarks in 
PowerPoint documents. If there is any problem while installing the jar file or running codes, you can take notes on Forum.