mirror of
https://github.com/storytold/pdfcraft.git
synced 2026-10-26 11:19:48 +00:00
cyfung1031
118a12a0ad
ISO 32000-2 §12.5.5 maps an appearance onto its annotation with a matrix A that takes the lower-left and upper-right corners of the transformed appearance box to those of /Rect. The vendored interpreter scaled by /Rect size over box size but translated by /Rect.x0 - box.x0, which is only right when the box starts at the origin or the scale is 1. Any other appearance was drawn shifted by (scale - 1) × box origin, partly outside its /Rect: /BBox [10 10 30 30] in /Rect [10 10 60 40] painted x 25..74, y 55..84 instead of x 10..59, y 60..89 (device pixels). MuPDF, Poppler, PDFium and pdf.js all fill /Rect exactly. The translation is now /Rect.x0 - scale × box.x0 (and likewise for y). Boxes at the origin, and boxes as large as /Rect (PdfCraft's own appearances use /BBox = /Rect), map exactly as before. A box that collapses to a line still yields a non-finite matrix and is skipped. Test: raster::tests::annotation_appearance_box_maps_onto_rect. An offset /BBox, an offset made by /Matrix and a negative-origin /BBox now fill exactly /Rect (on main the first is drawn at (25, 55)-(74, 84)); a box at the origin and an offset box as large as /Rect are unchanged. Vendored patch (15) in vendor/README.md (after (14) in #276). Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>