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M9: visible digital signatures can show a drawn, typed or image graphic (#193) (#934)

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* M9: visible digital signatures can show a drawn, typed or image graphic (#193)

A visible certificate signature can show a graphic where the signer's
name is large, as Acrobat's Configure Signature Appearance does: the
saved Fill & Sign signature (drawn, typed or image) or an imported
PNG/JPEG. Sign as previews it and remembers the choice; sign_document
takes `graphic` (image, text or strokes).

pdfcraft-sign gains `Graphic` and `SignOptions::graphic`. Graphics are
checked and size-capped before drawing; images keep alpha as a soft
mask and are encrypted with the rest of the update in encrypted files.

Refs #193

* Refresh catalog hashes

---------

Co-authored-by: Brandon Thomas <echelon@gmail.com>
This commit is contained in:
Justin Wilkins
2026-10-11 13:47:51 -04:00
committed by GitHub
co-authored by Brandon Thomas
parent 626724bbdd
commit 56c034b0b3
33 changed files with 804 additions and 85 deletions
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parity/acrobat-features.toml
+3 -3
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@@ -5941,9 +5941,9 @@ tier = "P1"
milestone = "M9"
status = "partial"
commands = ["sign.digital"]
tools = []
evidence = ["crates/ui-egui/tests/signing.rs::drawing_a_signature_creating_an_id_signing_and_trusting"]
notes = "text items (name, date, reason, location, DN, labels); no graphics or saved appearances yet"
tools = ["sign_document"]
evidence = ["crates/ui-egui/tests/signing.rs::drawing_a_signature_creating_an_id_signing_and_trusting", "crates/ui-egui/tests/signing.rs::the_fill_and_sign_signature_or_an_image_shows_in_a_digital_signature", "crates/sign/tests/pdf.rs::visible_signatures_show_a_drawn_typed_or_image_graphic", "crates/sign/tests/pdf.rs::malformed_signature_graphics_are_refused_not_drawn", "crates/sign/tests/pdf.rs::an_encrypted_documents_signature_graphic_is_encrypted_with_it", "crates/automation/tests/automation.rs::signing_with_an_image_typed_or_drawn_graphic_through_tools"]
notes = "text items (name, date, reason, location, DN, labels), and a graphic where the large name would be: the saved Fill & Sign signature (drawn, typed or image) or an imported PNG/JPEG (white paper made transparent, as in Fill & Sign), remembered for the next signing; alone it fills the box. Missing: named saved appearances (one remembered choice only), a PDF page as the graphic, the logo/watermark background, drawing a new signature inside the dialog"
[[feature]]
id = "sign.reason-location"