* M6.2: form fields in Unicode CID fonts show Japanese instead of "?"
Japanese forms often give their fields a /DA font that /DR defines as a Type0
font with a predefined Unicode CMap, such as a non-embedded HeiseiMin-W3 with
/UniJIS-UCS2-H. Field appearances accepted only simple fonts, so they fell back
to Helvetica and WinAnsi, and every Japanese character was drawn as "?".
Appearances now use such fonts and encode the text in the CMap's form (UCS-2,
UTF-16, UTF-8 or UTF-32), measuring full-width characters as one em so centring,
auto size, comb cells and multiline wrapping fit. Identity-H and embedded CMaps
still fall back to Helvetica.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
* M6.2: vertical Unicode CMaps fall back to Helvetica, since field appearances are horizontal
---------
Co-authored-by: Claude Opus 5.5 <[email protected]>
Co-authored-by: Brandon Thomas <[email protected]>
Japanese forms often name a check box's on state in Shift-JIS (「はい」 is
/#82#CD#82#A2). State names were read with from_utf8_lossy, so ticking such a
box wrote a different name to /AS and /V, no appearance matched, and the box
was drawn with no mark (or not at all).
Names now map to text losslessly (forms::name_text / name_bytes: UTF-8 as
itself, other bytes and `#` as #XX) wherever states and values are read and
written: /V, /DV and /AS, PdfCraft's own state appearances, and FDF import and
export, so such values also survive an FDF or XFDF round trip.
Co-authored-by: Claude Opus 5.5 <[email protected]>
Co-authored-by: Brandon Thomas <[email protected]>
Since #368, a non-embedded Adobe-Japan1 font with a Mincho name
(HeiseiMin-W3, MS-Mincho, ...) is drawn in document_japanese_font(),
i.e. Shippori Mincho. Shippori Mincho has none of the 63 half-width
katakana (U+FF61-U+FF9F), which are common in Japanese documents.
hayro maps the CID through Adobe-Japan1-UCS2 to Unicode, finds no
glyph in the face's cmap, and falls back to drawing the CID as a glyph
index: half-width katakana came out as unrelated glyphs (ligatures
such as fi and fl).
The Mincho substitute is now BIZ UDMincho Regular, which covers
half-width katakana (and was designed as a metric-compatible
replacement for MS Mincho), falling back to document_japanese_font()
when it isn't built in. The face used for Japanese text written into
PDFs is unchanged. Without craft-fonts nothing changes.
Tests: raster::tests::mincho_substitute_covers_half_width_katakana
(with CRAFT_FONTS_DIR: the Mincho substitute's cmap maps U+FF61-U+FF9F
and 日本; it lacked all 63 half-width katakana before; skips without
craft-fonts). skrifa 0.44 is a dev-dependency of pdfcraft-render for
it, the version pdfcraft-fonts already uses. The parity entry
view.render-cid-fonts cites the test.
Co-authored-by: Claude Opus 5.5 <[email protected]>
