If the table is kept, when the table is present but only the accelerator
allocation failed, then we run into nullptr dereferences downstream in
hb_ot_map_t::apply when trying to access proxy.accels[i].
To fix this, instead of only setting lookup_count of accelerator_t
itself, drop the whole table to avoid hb-ot-map construction assuming
that the lookups will work correctly despite accelerator allocation
having failed.
Fixes:
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=24490https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=24490
@CURRENT_SOURCE_DIR@ is not listed as a valid string substitution
for custom targets in the Meson reference, and in practice
it does not get substituted when using the vs2019 backend.
When cairo comes from a subproject fallback it should still take
cairo-ft dependency, otherwise it miss freetype2 cflags.
Also update wrap file to use upstream repository now that meson support
has been merged.
This requires Meson >= 0.54.0 because cairo itself requires that version
and we use the new `fallback: 'cairo'` syntax without specifying a
variable name because cairo does not provide a variable name for
cairo-ft.
A BCP 47 language tag with both a script subtag and a region subtag
would be printed as a human-readable name in hb-ot-tag-table.hh as if it
only had its language subtag.
Offsets from LigatureArray must be relative to the beginning of the LigatureArray table. For the serialization mechanism to use the correct beginning point the LigatureArray must be created using the push()/pop() mechanism. So convert LigatureArray subsetting to use serialize_subset() instead of a manually called serialize and subset.
This matches fontTools behaviour. glyphset_gsub does not contain gids added from closing over composite glyphs in glyf, since these cannot particpate in GSUB/GPOS processing.
The backtrack, input, and lookahead sequence must be matched in their entirety so these sequences should not be subset. If any of the coverage tables in a sequence subsets to empty then the whole subtable should be dropped since it's not possible for this lookup to be activated.
Behdad Esfahbod
Dominik Röttsches
Myaamori
David Corbett
Khaled Hosny
Khaled Hosny
Xavier Claessens
Simon Cozens
Fabrice Fontaine
Garret Rieger
Qunxin Liu
Koji Ishii
n8willis