insert image to PPTX

ExportToPowerPoint

final XSLFSlide graphSlide = slideShow.createSlide(layoutMap.get(graphLayout).get(0));
PictureData.PictureType graphpictype = PictureData.PictureType.PNG;
XSLFPictureData graphidx = null;
try {
    final byte[] graphPictureData;
    try (InputStream is = new FileInputStream(graphpict)) {
        graphPictureData = IOUtils.toByteArray(is);
    }
    graphidx = slideShow.addPicture(graphPictureData, graphpictype);
} catch (Exception e) {
    getLogger().log(Level.FINE, "slideShow.addPicture(graphpictureData, graphpictype)");
}
for (XSLFTextShape textShape : graphSlide.getPlaceholders()) {
    CTShape sh = (CTShape) textShape.getXmlObject();
    CTPlaceholder ph = sh.getNvSpPr().getNvPr().getPh();
    if (ph != null && graphidx != null) {
        STPlaceholderType.Enum pType = ph.getType();
        if (pType == STPlaceholderType.PIC) {
            final Rectangle2D anchor = textShape.getAnchor();
            final XSLFPictureShape pic;
            pic = graphSlide.createPicture(graphidx);
            double ratio;
            // try to keep image ratio of x/y
            try {
                final BufferedImage i = ImageIO
                        .read(new ByteArrayInputStream(pic.getPictureData().getData()));
                ratio = (double) i.getHeight() / (double) i.getWidth();
                double stretchedRatio = anchor.getHeight() / anchor.getWidth();
                if (ratio > 0 && stretchedRatio > ratio) {
                    final double new_cy = anchor.getWidth() * ratio;
                    final double new_y = anchor.getMinY() + (anchor.getHeight() - new_cy) / 2;
                    anchor.setRect(anchor.getMinX(), new_y, anchor.getWidth(), new_cy);
                } else if (ratio > 0) {
                    final double new_cx = anchor.getHeight() / ratio;
                    final double new_x = anchor.getMinX() + (anchor.getWidth() - new_cx) / 2;
                    anchor.setRect(new_x, anchor.getMinY(), new_cx, anchor.getHeight());
                }
            } catch (Exception e) {
                // do nothing, pic is stretched :-(
            }
            // remove the placeholder shape
            graphSlide.removeShape(textShape);
            // insert a picture instead
            pic.setAnchor(anchor);
        } else {
            for (XSLFTextParagraph paragraph : textShape.getTextParagraphs()) {
                for (XSLFTextRun run : paragraph.getTextRuns()) {
                    run.setText(handleReplaceTags(run.getRawText(), data.get(0)));
                }
            }
        }
    }
}