Convert Powerpoint to JPG

About PowerPoint to JPG Conversion

With Aspose.Slides API you can convert PowerPoint PPT or PPTX presentation to JPG image. It is also possible to convert PPT/PPTX to JPEG, PNG or SVG. With this features it’s easy to implement your own presentation viewer, create  the thumbnail for every slide. This may be useful if you want to protect presentation slides from copywriting, demonstrate presentation in read-only mode. Aspose.Slides allows to convert the whole presentation or a certain slide into image formats. 

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Convert PowerPoint PPT/PPTX to JPG

Here are the steps to convert PPT/PPTX to JPG:

  1. Create an instance of Presentation type.
  2. Get the slide object of ISlide type from Presentation.getSlides() collection.
  3. Create the thumbnail of each slide and then convert it into JPG. ISlide.getThumbnail(float scaleX, float scaleY) method is used to get a thumbnail of a slide, it returns BufferedImage object as a result. getThumbnail method has to be called from the needed slide of ISlide type, the scales of the resulting thumbnail are passed into the method.
  4. After you get the slide thumbnail, call ImageIO.write(RenderedImage im, String formatName, File output) method from the thumbnail object. Pass the resulting file name and the image format into it. 
Presentation pres = new Presentation("PowerPoint-Presentation.pptx");
try {
    for (ISlide sld : pres.getSlides()) {
        // Creates a full scale image
        BufferedImage bmp = sld.getThumbnail(1f, 1f);

        // Saves the image to disk in JPEG format
        ImageIO.write(bmp, "JPEG", new java.io.File(String.format("Slide_%d.jpg", sld.getSlideNumber())));
    }
} catch (IOException e) {
} finally {
    if (pres != null) pres.dispose();
}

Convert PowerPoint PPT/PPTX to JPG with Customized Dimensions

To change the dimension of the resulting thumbnail and JPG image, you can set the ScaleX and ScaleY values by passing them into the ISlide.getThumbnail(float scaleX, float scaleY) methods:

Presentation pres = new Presentation("PowerPoint-Presentation.pptx");
try {
    // Defines dimensions
    int desiredX = 1200;
    int desiredY = 800;
    // Gets scaled values of X and Y
    float ScaleX = (float) (1.0 / pres.getSlideSize().getSize().getWidth()) * desiredX;
    float ScaleY = (float) (1.0 / pres.getSlideSize().getSize().getHeight()) * desiredY;

    for (ISlide sld : pres.getSlides())
    {
        // Creates a full scale image
        BufferedImage bmp = sld.getThumbnail(ScaleX, ScaleY);

        // Saves the image to disk in JPEG format
        ImageIO.write(bmp, "JPEG", new java.io.File(String.format("Slide_%d.jpg", sld.getSlideNumber())));
    }
} catch (IOException e) {
} finally {
    if (pres != null) pres.dispose();
}

Render Comments when saving Presentation into Image

Aspose.Slides for Java provides a facility that allows you to render comments in a presentation’s slides when you are converting those slides into images. This Java code demonstrates the operation:

Presentation pres = new Presentation("presentation.pptx");
try {
    IRenderingOptions opts = new RenderingOptions();
    opts.getNotesCommentsLayouting().setNotesPosition(NotesPositions.BottomTruncated);

    for (ISlide sld : pres.getSlides()) {
        BufferedImage image = new BufferedImage(740, 960, BufferedImage.TYPE_INT_ARGB);
        java.awt.Graphics graphics = image.createGraphics();
        try {

            pres.getSlides().get_Item(0).renderToGraphics(opts, (Graphics2D) graphics);
        } finally {
            if (graphics != null) graphics.dispose();
        }
        ImageIO.write(image,"png", new java.io.File(String.format("Slide_%d.png", sld.getSlideNumber())));
    }
} catch (IOException e) {
} finally {
    if (pres != null) pres.dispose();
}

See also

See other options to convert PPT/PPTX into image like: