[Issue 43029] support PS-OpenType/OTF/(SFNT with CFF) fonts for PDF export and printing

[hdu at openoffice.org]

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http://www.openoffice.org/issues/show_bug.cgi?id=43029





------- Additional comments from hdu at openoffice.org Mon Apr 14 09:29:11 +0000 2008 -------
@nmailhot: Fedora is replacing its Type1 fonts by their CFF-OTF counterparts? That is very interesting 
and changes the priority of the feature request.

@adrianjohnson: good to see you here. Welcome!

I had a closer look at the PS export and especially its font handling. For CFF fonts the fallback method 
seems to be used: The glyph outlines get wrapped into a Type1, but hints are lost. Of course hints in 
Type1 fonts are not as important as for TTFs, but since the conversion between CFF and Type1 can be 
done without any loss, I was hoping for that. I already have some code that does that, but it is not 
reliable enough yet. If we need a quick solution the fallback to outlines seems to be a reasonable 
alternative though. On the other hand experts advocating CFF outlines over TTF outlines seem to be 
extremely sensitive about this topic.

The full-CFF to subset-CFF conversion used in cairo's PDF export is very nice indeed. Thanks for the 
pointer! We'll need CFF-subsetting on Windows too, but don't have any use for other parts of cairo on 
that platform yet. There are not too many deep dependencies into cairo's infrastructure, so if breaking 
this part out is technically feasible I'd like to do it, if you agree.


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