Re: [ft] FT_Face_Copy()?

[Ian Britten]

Werner LEMBERG wrote:
> > In our code, we use FTC_Manager_New()/etc to cache the various
> > faces, glyphs, cmaps, etc.  [...]
> >
> > I've recently added Cairo (http://cairographics.org/) support to our
> > code, for exporting to PDF/etc.  In order to get Cairo to render our
> > text correctly, I use their FT-specific rendering hooks,
> > specifically cairo_ft_font_face_create_for_ft_face()
> > http://cairographics.org/manual/cairo-ft-font.html#cairo-ft-font-face-create-for-ft-face
> >
> > Unfortunately, this connection exposes a memory-management mismatch,
> > which is what I'm trying to simplify with this request [...]:
>
> Asking the obvious: You have already contacted the cairo people?  If I
> understand the issue correctly, it isn't directly a problem with
> FreeType but an interface issue between cairo and FreeType.

Yes.  Actually, it was my discussions with them that resulted in them
adding the memory-management clarifications to the docs of that
function.

Their recommended solution was to not use the FT cache.  :P
[ Apparently, Pango doesn't use the cache, and they've never seen
anyone else use it either... ]

> Adding an `FT_Face_Copy' shouldn't be very hard, but I'm not sure it
> is the right solution to this problem.

I guess, given Davids comments in the other message, that this
function may actually be a 'no-go' for FT.  As such, I guess I'll
have to stick with what I've got...

Thanks for the feedback!
Ian