3 people 7fafadc3a2 M2: text turned at any angle reads as lines along its own baseline (#735) ...

* M2: text turned at any angle reads as lines along its own baseline

The text layer sorted every glyph into the nearest of four quarter turns
and laid it out by its axis-aligned box. Text at 30-60 degrees lost its
word gaps, split into one line per word in reverse order, or interleaved
two neighbouring lines letter by letter; text set along a curve came out
in fragments.

Each glyph now keeps its drawn em box as a quad and its writing
direction. Glyphs within the layout's word-gap tolerance (sin 0.15) of a
quarter turn take the existing path unchanged. Other glyphs are laid out
in a frame along their own baseline, one flow per direction; runs that
continue each other while turning (stamps, seals) are unrolled into one
line. Turned text keeps the place in the reading order that its first
glyph had before.

Horizontal, quarter-turn, skewed and near-axis text is bit-identical
(text, rect, line_of, space_before) over pdf_engine_test.pdf, the
crates' test PDFs and 300 synthetic pages.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* M2: look up a turned glyph's direction among directions only, not every curved run

Curved runs can number about half the glyphs, which made grouping quadratic on hostile pages.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
Co-authored-by: Brandon Thomas <echelon@gmail.com>

2026-10-10 06:19:54 -04:00

..

src

M2: text turned at any angle reads as lines along its own baseline (#735)

2026-10-10 06:19:54 -04:00

Cargo.toml

M2: bound page-label traversal and output (#480)

2026-10-09 14:12:16 -04:00