Created attachment 31129 [details] contains Chinese characters, English characters in two different fonts When mixed fonts are present with chinese characters (like MS Gothic, Calibri) unable to convert ppt to images. For single font in entire file it works fine.
Created attachment 31151 [details] [PATCH] Bug 55902 - fallback font renderer this patch contains a modified version of the TextPainter which generates an AttributedString with fallback fonts in case the original font can't display the glyphs. this is possible due to unset/default font family settings in the original ppt - also for the Chinese symbols. Due to upload limitations, the mona font is not included - it can be downloaded at http://sourceforge.net/projects/monafont (I'll commit this patch when I've finished committing my other uncommitted patches ...)
Applied with r1567455
*** Bug 54880 has been marked as a duplicate of this bug. ***
There was a regression ... the code simply didn't make it into the Common SL rendering. This was fixed via r1772485