https://issues.apache.org/bugzilla/show_bug.cgi?id=54433
Bug ID: 54433
Summary: NullPointerException when Initializing the
AffineTransform Object as part of the
XSLFGroupShape.draw(Graphics2D graphics) method
Product: POI
Version: 3.8
Hardware: PC
Status: NEW
Severity: normal
Priority: P2
Component: XSLF
Assignee: [email protected]
Reporter: [email protected]
Classification: Unclassified
Attempting to transform all XSLFShapes to PNGs using PPTX2PNG as an example I
used this modified code:
XMLSlideShow ppt = new XMLSlideShow(OPCPackage.open(file));
Dimension pgsize = ppt.getPageSize();
int width = (int) (pgsize.width * scale);
int height = (int) (pgsize.height * scale);
XSLFSlide[] slide = ppt.getSlides();
for (int i = 0; i < slide.length; i++) {
if (slidenum != -1 && slidenum != (i + 1)) continue;
String title = slide[i].getTitle();
System.out.println("Rendering slide " + (i + 1) + (title == null ?
"" : ": " + title));
XSLFShape[] pdps = slide[i].getShapes();
int count = 0;
for(XSLFShape pdp : pdps){
BufferedImage img = new BufferedImage(width, height,
BufferedImage.TYPE_INT_RGB);
Graphics2D graphics = img.createGraphics();
// default rendering options
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.BLUE);
graphics.clearRect(0, 0, width, height);
graphics.scale(scale, scale);
graphics.getTransform().setToIdentity();
// draw stuff
// save the result
int sep = file.lastIndexOf(".");
String fname = file.substring(0, sep == -1 ? file.length() :
sep) + "-" + (i + 1) +"_"+ count++ + ".png";
pdp.draw(graphics);
FileOutputStream out = new FileOutputStream(fname);
ImageIO.write(img, "png", out);
out.close();
}
When pdp instanceof XSLFGroupShape is true, I receive:
Exception in thread "main" java.lang.NullPointerException
at java.awt.geom.AffineTransform.<init>(Unknown Source)
at
org.apache.poi.xslf.usermodel.XSLFGroupShape.draw(XSLFGroupShape.java:296)
...
As far as I can tell this is a bug. I cannot find the Null Object that is being
used.
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