Add Watermark to PowerPoint Presentations in Java

readme.md

Read the complete article on adding watermark to the PowerPoint presentations using Java: https://blog.aspose.com/2021/06/13/add-watermark-to-powerpoint-using-java/

add-image-watermark-to-PowerPoint.java

// Open presentation
Presentation pres = new Presentation("presentation.pptx");

try {
	// Access slide master
	IMasterSlide master = pres.getMasters().get_Item(0);

	Point2D.Float center = new Point2D.Float((float) pres.getSlideSize().getSize().getWidth() / 2,
			(float) pres.getSlideSize().getSize().getHeight() / 2);

	float width = 300;
	float height = 300;
	float x = (float) center.getX() - width / 2;
	float y = (float) center.getY() - height / 2;

	// Add shape
	IAutoShape watermarkShape = master.getShapes().addAutoShape(ShapeType.Rectangle, x, y, width, height);

	IPPImage image = pres.getImages().addImage(Files.readAllBytes(Paths.get("watermark.png")));

	// Set fill type
	watermarkShape.getFillFormat().setFillType(FillType.Picture);
	watermarkShape.getFillFormat().getPictureFillFormat().getPicture().setImage(image);
	watermarkShape.getFillFormat().getPictureFillFormat().setPictureFillMode(PictureFillMode.Stretch);
	watermarkShape.getLineFormat().getFillFormat().setFillType(FillType.NoFill);

	// Lock Shapes from modifying
	watermarkShape.getAutoShapeLock().setSelectLocked(true);
	watermarkShape.getAutoShapeLock().setSizeLocked(true);
	watermarkShape.getAutoShapeLock().setTextLocked(true);
	watermarkShape.getAutoShapeLock().setPositionLocked(true);
	watermarkShape.getAutoShapeLock().setGroupingLocked(true);

	// Save the presentation
	pres.save("watermarked-presentation-image.pptx", SaveFormat.Pptx);

} finally {
	if (pres != null)
		pres.dispose();
}

add-watermark-to-PowerPoint.java

// Open presentation
Presentation pres = new Presentation("presentation.pptx");

try {
	// Access master
	IMasterSlide master = pres.getMasters().get_Item(0);

	Point2D.Float center = new Point2D.Float((float) pres.getSlideSize().getSize().getWidth() / 2,
			(float) pres.getSlideSize().getSize().getHeight() / 2);

	float width = 300;
	float height = 300;
	float x = (float) center.getX() - width / 2;
	float y = (float) center.getY() - height / 2;

	// Add shape
	IAutoShape watermarkShape = master.getShapes().addAutoShape(ShapeType.Rectangle, x, y, width, height);

	// Set fill type
	watermarkShape.getFillFormat().setFillType(FillType.NoFill);
	watermarkShape.getLineFormat().getFillFormat().setFillType(FillType.NoFill);

	// Set rotation angle
	watermarkShape.setRotation(-45);

	// Set text
	ITextFrame watermarkTextFrame = watermarkShape.addTextFrame("Watermark");

	// Set font and color
	IPortion watermarkPortion = watermarkTextFrame.getParagraphs().get_Item(0).getPortions().get_Item(0);
	watermarkPortion.getPortionFormat().setFontHeight(52);

	int alpha = 150, red = 200, green = 200, blue = 200;
	watermarkPortion.getPortionFormat().getFillFormat().setFillType(FillType.Solid);
	watermarkPortion.getPortionFormat().getFillFormat().getSolidFillColor()
			.setColor(new Color(red, green, blue, alpha));

	// Lock Shapes from modifying
	watermarkShape.getAutoShapeLock().setSelectLocked(true);
	watermarkShape.getAutoShapeLock().setSizeLocked(true);
	watermarkShape.getAutoShapeLock().setTextLocked(true);
	watermarkShape.getAutoShapeLock().setPositionLocked(true);
	watermarkShape.getAutoShapeLock().setGroupingLocked(true);

	// Save the presentation
	pres.save("watermarked-presentation.pptx", SaveFormat.Pptx);

} finally {
	if (pres != null)
		pres.dispose();
}