[cairo] OpenType font variations and cairo

[Behdad Esfahbod]

On Thu, Sep 28, 2017 at 7:29 PM, Adrian Johnson <ajohnson at redneon.com>
wrote:

> On 29/09/17 08:31, Behdad Esfahbod wrote:
> > On Thu, Sep 28, 2017 at 6:09 PM, Adrian Johnson <ajohnson at redneon.com
> > <mailto:ajohnson at redneon.com>> wrote:
> >
> >     On 29/09/17 06:06, Matthias Clasen wrote:
> >     I pulled your latest changes and tested with various combinations of
> >     freetype and fontconfig - see below. All good on the cairo side,
> except
> >     for the build fail with FT 2.6.3 but I mentioned that needs fixing
> in my
> >     review comments.
> >
> >     There appears to be a bug in fontconfig master when using freetype
> 2.8.
> >
> >     If you cleanup and rebase your commits to master with all review
> >     comments addressed, I'll do a final check and then it should be good
> to
> >     commit.
> >
> >
> > Thanks Adrian for all the help.
> >
> >     freetype 2.6.3: build failed - FT_Get_Var_Design_Coordinates not
> found
> >
> >     freetype 2.8, fontconfig 2.11.0 : pass
> >
> >     freetype 2.8, fontconfig 2.12.5 : pass
> >
> >     freetype 2.8, fontconfig master :
> >
> >     When running the fc-cache built from master I get:
> >       fc-cache: fcfreetype.c:2143: IA__FcFreeTypeQueryAll: Assertion
> >       `mm_var' failed.
> >
> >     fc-cache succeeds after removing AdobeVFPrototype.ttf from ~/.fonts
> >
> >     I tried again with AdobeVFPrototype.otf. fc-cache ran successfully
> and
> >     the cairo test passed.
> >
> >
> > Humm.  This sounds very much like what might happen with old FreeType .
> > If not, can you elaborate what happens again?  Can you reproduce?  What
> > FreeType exactly?   Does `fc-query AdobeVFPrototype.ttf` work?
>
> FreeType 2.8.0. I can reproduce. fc-query AdobeVFPrototype.ttf also
> produces the same error.
>
> I looked into it and it seems to be the same problem Matthias fixed in
> a827d7e515c7c. I applied a similar patch to fontconfig (see attached)
> and fc-cache and fc-query now work.
>

Yeah, bad bad FreeType. Humm.  Not sure if I like to take that patch.  I
prefer to bump required FreeType version to 2.8.1.  Suggest we do the same
to cairo and clean up all old #ifdef's.


>
> >
> > I can probably replace assert with a less harsh mode of failure.
> >
> >
> >
> >     freetype 2.8.1, fontconfig 2.11.0 : pass
> >
> >     freetype 2.8.1, fontconfig 2.12.5 : pass
> >
> >     freetype 2.8.1, fontconfig master : pass
> >
> >     freetype master, fontconfig master : pass
> >
> >
> >
> >
> >
> >
> >
> >
> > --
> > behdad
> > http://behdad.org/
> >
> >
>
>


-- 
behdad
http://behdad.org/
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