PPTX for PNG rendering - Apache POI

Question

I convert pptx slides to png using the POI library, but it doesn’t display the colors of the slides correctly, instead of displaying turquoise, it will be grayed out. I tried converting pptx slides to svg but got the same problem, so I was wondering if this was related to the XMLSlideShow class or the XSLFSlide class. Any help would be greatly appreciated!

Code:

String file = "C:\\Users\\ABC\\demo1.pptx"; XMLSlideShow ppt = null; ppt = new XMLSlideShow(OPCPackage.open(new File(file))); Dimension pgsize = ppt.getPageSize(); float scale = 1; int width = (int) (pgsize.width * scale); int height = (int) (pgsize.height * scale); XSLFSlide[] slide = ppt.getSlides(); for (int i = 0; i < slide.length; i++) { String title = slide[i].getTitle(); BufferedImage img = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); Graphics2D graphics = img.createGraphics(); graphics.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); graphics.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY); graphics.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BICUBIC); graphics.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON); graphics.setColor(Color.white); graphics.clearRect(0, 0, width, height); graphics.scale(scale, scale); slide[i].draw(graphics); int sep = file.lastIndexOf("."); String fname = file.substring(0, sep == -1 ? file.length() : sep) + "-" + (i + 1) +".png"; FileOutputStream out = new FileOutputStream(fname); ImageIO.write(img, "png", out); out.close(); } 

Answer 1

This is a problem with the apache POI library. Please use an older version, i.e. 3.7, which can solve your problem.