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AF.5: bound hostile Affinity files; fuzz the new import paths

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- One budget for the whole read (layers, pixels, characters, table
  cells), shared with embedded documents and charged also when their
  reading fails; the first reading is dropped before the second.
- Tables: at most 65 536 cells; lines and cell formats that don't
  match the grid are left out instead of shifted.
- Paragraph formats matched to runs by binary search; font names
  longer than 256 bytes are dropped.
- Overlays: one work budget per import; encoded originals decoded
  within their layer's size; table cell outlines recoloured too.
- Engine: master page copies capped, each page's master found in
  linear time, line gaps looked up once per font, the working CMYK
  table built once, objects past MAX_COORD left out.
- Embedded content stays with its node; pixel masks under artistic
  text are read whole and include stroke reach; gradient overlays on
  hidden layers are kept.
- Render: contexts and raster effect images stay within
  MAX_RASTER_SIDE per side (vello overflowed near u16::MAX; found by
  the new fuzz target).
- Tests: affinity tests/import_limits.rs, feature samples in
  import_fuzz.rs, shared builders in engine/tests/support/.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
This commit is contained in:
dwetscher
2026-10-22 18:24:57 +07:00
committed by bflatastic
co-authored by Claude Opus 5.5
parent fd50bd6f84
commit f73a3df974
16 changed files with 1330 additions and 524 deletions
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docs/gaps.md
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@@ -433,7 +433,7 @@ separate. Scores and hours unchanged. [Behavior and command details](development
| Date | Change | Summary |
|---|---|---|
| 2026-10-22 | minor | Affinity import: master pages, tables, paragraph formats, text scale, shadows, glows, outlines, overlays, underlines, strikethrough, CMYK pixel layers through the document's profile and editable embedded documents, text placed as Affinity places it (AF.5, from storytold/designcraft#291). No entry closed, estimates unchanged. |
| 2026-10-22 | minor | Affinity import: master pages, tables, paragraph formats, text scale, shadows, glows, outlines, overlays, underlines, strikethrough, CMYK pixel layers through the document's profile and editable embedded documents, text placed as Affinity places it (AF.5, from storytold/designcraft#291). No entry closed, estimates unchanged. Hostile files stay bounded: one budget for the whole read (layers, pixels, characters, table cells, embedded documents included), a work budget for overlays, capped master page copies, objects past `MAX_COORD` left out; the import fuzzer and limit tests cover tables, paragraphs, effects, overlays, master pages, CMYK pixels and embedded documents. |
| 2026-10-22 | minor | Recolor Artwork Edit chips scroll within the available screen height (#3416); small palettes retain their tab height; scores and estimates unchanged. |
| 2026-10-21 | minor | Blend panel Type and Ramp control step easing with a separate color Shift (#2539); Blend Options retains spacing and orientation; polynomial curves are original approximations. Scores and estimates unchanged. |
| 2026-10-21 | minor | M3: highlighted-text Eyedropper sampling preserves ranges and rejects unsupported source/target transparency atomically; regression-tested; scores and estimates unchanged. |
docs/target-app-parity.md
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@@ -981,7 +981,7 @@ separate. Scores and hours unchanged. [Behavior and command details](development
| Date | Change | Summary |
|---|---|---|
| 2026-10-22 | minor | File formats: Affinity import gains master pages, tables, paragraph formats, text scale, shadows, glows, outlines (also on stroked shapes), overlays, underlines, strikethrough and editable embedded documents, strokes styled None left out, CMYK pixel layers through the document's CMYK profile, text placed as Affinity places it (AF.5, from storytold/designcraft#291); synthetic, corpus and local-thumbnail tests; score and hours unchanged (estimated). |
| 2026-10-22 | minor | File formats: Affinity import gains master pages, tables, paragraph formats, text scale, shadows, glows, outlines (also on stroked shapes), overlays, underlines, strikethrough and editable embedded documents, strokes styled None left out, CMYK pixel layers through the document's CMYK profile, text placed as Affinity places it (AF.5, from storytold/designcraft#291); synthetic, corpus and local-thumbnail tests; score and hours unchanged (estimated). Hostile files stay bounded: one budget for the whole read (layers, pixels, characters, table cells, embedded documents included), a work budget for overlays, capped master page copies, objects past `MAX_COORD` left out; the import fuzzer and limit tests cover tables, paragraphs, effects, overlays, master pages, CMYK pixels and embedded documents. |
| 2026-10-22 | minor | Recolor Artwork Edit chips scroll within the available screen height (#3416); small palettes retain their tab height; scores and estimates unchanged. |
| 2026-10-22 | minor | Font pickers list recently applied families first (#3515), using the existing recent-font limit; search, filters, previews and keyboard selection share the same rows. Scores and estimates unchanged. |
| 2026-10-21 | minor | Print: PDF/X-1a and PDF/X-3 flattening in a CMYK document rasterizes as ink amounts, so CMYK colours under an image with see-through pixels keep their numbers, K included, instead of going through RGB (#2160); own-fixture test; scores and hours unchanged (estimated) |