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d94da2038a M2: pages with /UserUnit are shown at their size in points, as in Acrobat (#722 )

* M2: pages with /UserUnit are shown at their size in points, as in Acrobat

/UserUnit gives the size of a page's user-space unit in points; PdfCraft
ignored it everywhere except the measuring tools, so a /UserUnit 2 page
was shown, extracted, printed and edited at half its size, and the
measuring tools disagreed with the rest of the app.

The value is now read as Acrobat reads it (the page's own entry, a number
from 1 up, at most 75,000; anything else counts as 1) in two places:
- vendored hayro-syntax Page (patch 13): render_dimensions and
  initial_transform give the page in points, so rendering, tiles,
  PageInfo and the text layer follow; a page without it keeps exactly
  the transform it had.
- pdfcraft-model Page: user_unit(), and display_size/view_matrix in
  points, so print, header/footer, watermark, background, added content
  and measuring agree with the screen. The measure crate drops its own
  arithmetic. Added items record the /UserUnit they were written for;
  items without the record (written before) read back converted.

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

* M2: an added item's recorded /UserUnit is clamped like the page's

An infinite or huge recorded /UserUnit made the scale factor 0 and collapsed the item.

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 06:19:31 -04:00

src

M2: pages with /UserUnit are shown at their size in points, as in Acrobat (#722 )

2026-10-10 06:19:31 -04:00

Cargo.toml

Rename PrintCraft to PdfCraft (#174 )

2026-10-07 16:03:57 -04:00

README.md

M2: pages with /UserUnit are shown at their size in points, as in Acrobat (#722 )

2026-10-10 06:19:31 -04:00

README.md

pdfcraft-model

Layer L2: typed views over the pdfcraft-cos object graph. It starts small, with what several L3/L4 crates need:

pages(doc): leaf pages in order, each with its inherited attributes (Resources, MediaBox, CropBox, Rotate, §7.7.3.4) resolved;
Page::crop, Page::rotation, Page::user_unit and Page::view_matrix: the displayed page's geometry, and the matrix from "display space" (points, origin at the bottom-left of the page as shown, after /UserUnit and /Rotate) to user space, so content can be placed the way the reader sees the page. /UserUnit is read as Acrobat reads it: the page's own entry, a number from 1 up, at most 75,000; anything else counts as 1. view_matrix_for(rotation, rect) is the same matrix for any rectangle, e.g. to draw a comment's picture upright inside its user-space /Rect on a turned page.

organize, annot and forms still carry their own small walkers; they move here as the model grows (ADR-0004).