The only effect is, if shaper_list was not NULL and no shaper was found,
we now don't insert anything into cache and return earlier.

Wasn't breaking out of loop, ouch!

http://www.mail-archive.com/debian-bugs-dist@lists.debian.org/msg1246370.html

Was very broken.  Now fixed and tested.

Report has it that it builds (and works) now:

  https://codereview.qt-project.org/#/c/92087/

See comments.

Fixes vertical text.  CoreText backend is in very good shape now!

Also see:
5a0eed3b
25f4fb9b

Fixes http://github.com/behdad/harfbuzz/pull/36

Currently doesn't work though, we detect font fallback.  Apparently
matching on ct_font is not safe for this.  Looks like commit
25f4fb9b wasn't enough after all.

Wasn't needed after a6b8dc87.

Assert that all runs had expected direction, and take hint for
non-monotone clusters.

After 763e5466, one doesn't
need to set flags for different pieces of text.  The flags now
are something the client sets up once, depending on how it
actually uses the buffer.  As such, don't clear it in
clear_contents().

Tests updated.

Have to use a CTTypesetter for this.

It's hard to handle all possible NULL returns from CoreText.  Add one
more...

Fixes https://githu.com/behdad/harfbuzz/issues/49
to the extent that it can be fixed.

Before, this shaper was returning UTF-16 cluster indices instead of
returning whatever cluster values the user had had set up in the buffer.
Ouch!

We can't really resize buffer and continue in this shaper as we are
using the scratch buffer for string_ref and log_cluster.  Restructure
shaper to retry from (almost) scratch.

To be used soon.

Fixes http://github.com/behdad/harfbuzz/pull/36

Test with:

hb-view /Library/Fonts/Zapfino.ttf ZapfinoZapfino --features=-dlig[7:] --shaper=coretext

As exercised by hb-coretext .notdef code.

Based on errors seen here:
http://testresults.qt-project.org/ci/QtBase_dev_Integration/build_03837/wince70embedded-armv4i-msvc2008_Windows_7/log.txt.gz

Fully untested.

Apparently those functions documented as sometimes returning NULL
actually exercise that right in OS X 10.10 Yosemite.  The scratch
was too small for that.  I *think* I fixed it, but haven't tested
as I don't have Yosemite.

Fixes https://bugs.freedesktop.org/show_bug.cgi?id=82306

Apparently they are not (advertised as?) safe on BSD systems.
We ignore the case of static libraries.

Whitelisted on glibc, Android, and MSVC / mingw.

https://bugs.freedesktop.org/show_bug.cgi?id=82246

Was broken in 615d00ea.

Fixes https://github.com/behdad/harfbuzz/pull/48

Micro-test added.