Add / remove watermark to Java PowerPoint

Watermarks are characters, logos, and figures that display copyright to prevent theft of still images and videos. This time, I will show you how to add/remove image watermarks and text watermarks to PowerPoint in Java using Spire.Presentation for Java.

Preparation

1. From the official website of E-iceblue Free Spire. Presentation for Java Download the free version.

2. Launch the IDE to create a new project, then add the appropriate Spire. Presentation.jar to the reference that was in the installed file.

Original file

Character Watermark

public class watermark { public static void main(String[] args) throws Exception {

    //Create a presentation object.
    Presentation presentation = new Presentation();
    presentation.loadFromFile("C:\\Users\\Administrator\\Desktop\\Sample.pptx");

    //Sets the width and length of the watermark.
    int width= 400;
    int height= 300;

    //Create a rectangular field.
    Rectangle2D.Double rect = new Rectangle2D.Double((presentation.getSlideSize().getSize().getWidth() - width) / 2,
            (presentation.getSlideSize().getSize().getHeight() - height) / 2, width, height);

    //Add a shape to the rectangular field.
    IAutoShape shape = presentation.getSlides().get(0).getShapes().appendShape(ShapeType.RECTANGLE, rect);

    /Place the shape design.
    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("Copying prohibited");
    PortionEx textRange = shape.getTextFrame().getTextRange();

    //Place the watermark design.
    textRange.getFill().setFillType(FillFormatType.SOLID);
    textRange.getFill().getSolidColor().setColor(Color.pink);
    textRange.setFontHeight(50);

    //you save.
    presentation.saveToFile("output/result.pptx", FileFormat.PPTX_2010);
}

}

 <h4> <strong> Completion example </strong> </h4>
<p><img src="https://cdn-ak.f.st-hatena.com/images/fotolife/l/lendoris/20210106/20210106113430.png " alt="f:id:lendoris:20210106113430p:plain" title="" class="hatena-fotolife" itemprop="image" /></p>
 <h4> <strong> Image watermark </strong> </h4>

```java
import com.spire.presentation.*;
import com.spire.presentation.drawing.*;
import javax.imageio.ImageIO;
import java.io.File;


public class addImageWatermark {

    public static void main(String[] args) throws Exception {
        //Load the document.
        Presentation presentation = new Presentation();
        presentation.loadFromFile("Sample.pptx");

        //Get the image watermark.

        File file =new File("logo.png ");
        IImageData image = presentation.getImages().append(ImageIO.read(file));

        //Gets the background attributes of the slide and places the image fill.
 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);

        
        //you save
        presentation.saveToFile("addImageWatermark.pptx";, FileFormat.PPTX_2013);
    }
}

Completion example

Code to remove watermark

import com.spire.presentation.*;
import com.spire.presentation.drawing.*;

public class removeTextOrImageWatermark {

    public static void main(String[] args) throws Exception {
        //Load the document.
        Presentation presentation = new Presentation();
        presentation.loadFromFile("Sample.pptx");

        //Remove the watermark in the textbook.
        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("E-iceblue"))
                    {
                        presentation.getSlides().get(i).getShapes().remove(shape);
                    }
                }
            }
        }

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

        //you save.
        presentation.saveToFile("removeTextOrImageWatermark.pptx";, FileFormat.PPTX_2013);
    }
}