Windows metafiles (WMF, EMF), common for logos, crests and diagrams in
older documents, couldn't be decoded and showed as grey boxes, on screen
and in PDF.
The new crate wordcraft-metafile (layer 1) reads them from the public
[MS-WMF] and [MS-EMF] specifications into paths and bitmaps, and places
them in a picture's box; render and pdf paint the result as vectors.
It covers the drawing records Office pictures use (lines, polygons,
curves, rectangles, ellipses, arcs, path brackets), pens and brushes,
the mapping modes and world transforms, and bitmaps in DIB form with the
usual raster operations. Input is treated as hostile: every read is
bounded, and a byte budget caps what one picture may allocate.
Not yet: text records (ExtTextOut) and EMF+ records are skipped, so a
metafile whose content is mostly text shows only its lines and fills.
docxide-pdf bench (365 documents, vs main + #135): the twelve documents
with WMF/EMF pictures show them; the pictures are a small part of their
pages, so the scores move little (Jaccard passes 208 -> 209, five
documents up to 3 SSIM points better, none worse).
Co-authored-by: Oliver Zieschang <4963183+naxvog@users.noreply.github.com>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
#214 gave now_iso the browser's clock on wasm; the other clock helpers were
still stubs there: Insert Date's weekday was always Thursday, the PDF
creation date was left out, and the layout and UI millisecond clocks
returned 0, so browser AutoSave's timer never fired, the caret didn't blink
and status messages never cleared.
The engine's clock is now one now_unix() (std on native, js_sys::Date in the
browser, as #214 does) that now_iso and the weekday share; the pdf, layout
and ui-egui clocks read js_sys::Date the same way on wasm. Refs #188.
Co-authored-by: Dmitrii Khlapov <19991457+dkhlapov@users.noreply.github.com>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
krilla subsets fonts only when the document is finished, so one font its
subsetter rejects ("failed to subset font: malformed font") failed the
whole PDF export. Two of the 365 documents in docxide-pdf's Word
reference corpus hit this on Linux: Caladea Italic and Bold Italic
(ttf-caladea, our metric-compatible stand-in for Cambria) and Noto Sans
New Tai Lue Bold.
When finishing fails on a font, the exporter finds the face krilla
names, logs a warning and writes the document again with that face's
glyphs drawn as filled outlines (FontDb::outline), including in the
watermark; every other font is still embedded as selectable text. At
most 32 faces fall back before the export gives up with the error.
kurbo moves from dev-dependencies to dependencies of wordcraft-pdf (it
was already in the workspace).
Test: a copy of the bundled Source Sans 3 with one glyph turned into a
truncated composite fails the old export exactly as the corpus documents
did; it now exports, with no text glyphs from that font and its glyphs
drawn as paths.
Co-authored-by: Oliver Zieschang <4963183+naxvog@users.noreply.github.com>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
skylar taylor-barrick