The DnD code for X11 adds the composite overlay window (aka COW) to the
cache.
Yet the X11 requests to get and release the COW may trigger XErrors that
we ought to ignore otherwise the client will abort.
Fixes: #3715
Update our compose sequences based on the current
update xorg Compose.pre file. Beyond that, remove
some deadkey sequences that we are now handling
(better) in code.
Make this script parse gtk-compose-remove.txt for
sequences to remove from the xorg Compose file.
This will be used for removing some deadkey combinations
that we can handle better in code.
Also, make this script explicitly python2. I tried
porting it to python3, but gave up in the end.
For sequences like ``, we want to commit the first
deadkey and then continue preedit with the second.
The alternative is to do chained deadkeys, where
entering ~~a yields ̃̀̃̃a. But we don't do that, and
I think that would be more controversial.
We only need these names when serializing a11y information
for tests. And copying these strings is entirely unnecessary.
So, just pass a callback instead.
The effectiveness of the front cache is limited by
subpixel positioning making it very likely that we
will meet the same glyph in different x phases inside
a single line of text.
Factoring the xphase into the front cache key makes things
better. For the string eeeeeeeeeeeeeeeeeee
before: 0% front cache hits
after: >90% front cache hits
Right now, we land inside a 404 if we go to:
https://gnome.pages.gitlab.gnome.org/gtk/
as we have all our API references in a sub-level. We should have a
landing page for the root, similar to developer.gnome.org/references/.
We don't want to be responsible for duplicating the effort of the hash
table, we just want to speed up subsequent lookups. Otherwise, we risk
not marking glyph usage when tracking usage for compaction.
This required finishing up the begin_frame/end_frame semantics for
GskNglTextureLibraryw which was apparently overlooked.
The driver was changed to provide more information to the library when
beginning frames. We do not need to use end_frame so that was removed.
The frame age is the same as GL (60) but I do wonder if that is based
on seconds if we should be using something longer for situations where
we have higher frame rates.
Fixes#3771
