Unit::parse took one level of recursion per + - * / sign, so a text such
as "1+1+...+1" with 200,000 terms overflowed the stack and aborted the
process. Every number field, parse_number and every command parameter read
as a length went through it.
Text with more than 128 + - * / signs now reads as nothing; text with 128
or fewer reads as before. docs/mcp.md states the limit for length strings.
The test a_very_long_expression_reads_as_nothing aborted with a stack
overflow before the change.
The measurement that runs before the style cascade and usvg now covers
the inputs that still got past it:
- usvg matches a selector without keeping what it found, so one whose
leftmost part matches nothing tests every set of ancestors in turn.
The measurement counts those tests for each copy and stops at
50,000,000; past that the SVG is refused with "the SVG's style sheets
take too long to match". An SVG image's matching stops at what the
SVG showing it left.
- A test counts one more for every 16 attributes a lookup scans and
every 16 bytes of the value it compares, so many classes against a
long class list count the work they do, in usvg's matching and in
the import's own cascade.
- The declarations the import's own cascade keeps, once per element,
count toward the 64 MB, including those of `:not()` rules, which usvg
drops. Each `:not()` alternative counts as a test.
- A linked SVG file is measured before its cascade runs. The linked SVG
files share one measurement: once they pass the limits together, the
files after that are shown without their links. The tests a file past
the limits made still count.
- SVG images share the element limit and the selector tests with the
SVG showing them, as they already shared the 64 MB.
The svg_filters reader measures its SVG before the cascade too.
With Show East Asian Options on, the OpenType panel menu has H or V
Style and Roman Italics. H or V Style is the character feature tag
`hkna`: kana take the forms the font draws for horizontal type, and in
vertical type the shaper applies `vkna` in its place. Roman Italics is
`ital`, the font's italic half-width alphanumerics. Both are on or off
only (`hkna=2` is refused), set through `features` and
`featureChanges`, cleared by Reset OpenType Features, and are switches
in Character Style Options > OpenType Features.
Docs: docs/mcp.md, docs/type-parity.md, docs/target-app-parity.md.
Merge carried each old edge's paint only to the new edge nearest the old
edge's middle, so when an added path cut a repainted edge, the other
piece went back to its source's stroke. Every new edge whose middle lies
on an old edge now takes that edge's paint, with its rows fitted to its
part of the edge, as Gap Options does.
Reverse Path Direction reversed each member path of a compound path and
turned the members' own stroke records, but left the compound path's
strokes as they were. A compound path's strokes run along its members'
subpaths in order, so its width profile and pen pressure, tilt, bearing
and rotation then ran the old way and the stroke drew differently.
reverse_stroke_records now also takes a compound path, reading its
members' subpaths in order, and path.reverse turns each compound path's
strokes with the combined reversal of its members before they reverse.
As for a path, the strokes turn only when every subpath turns alike.
BFlat