The code for working with pictures was rewritten. Now HSLF can work with all image formats supported by PowerPoint: JPEG, PNG, WMF, EMF and PICT. The patch includes the updated documentation and unit tests. Yegor
Created attachment 18796 [details] patch with the changes
Created attachment 18797 [details] ZIP archive with new and updated files
Patched committed, thanks for that Yegor (and sorry for the delay!)