aleleba/deckcraft
1
0
Fork 0
mirror of https://github.com/storytold/deckcraft.git synced 2026-10-30 13:36:52 -06:00
Code Issues Packages Projects Releases Wiki Activity

Pptx: read and write embedded fonts

Browse Source 
A deck that embeds a TrueType or OpenType face, including one wrapped as Embedded OpenType, now draws with that face and saves it back. MicroType Express subsets stay in the file and still draw in a stand-in.

Co-authored-by: Cursor <cursoragent@cursor.com>
This commit is contained in:
Nikita
2026-10-13 18:22:48 +03:00
co-authored by Cursor
parent 457406a7a5
commit 82dcd86c88
12 changed files with 398 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files
docs/file-format-parity.md
+4 -3
View File
@@ -1,6 +1,6 @@
# File-format parity with PowerPoint
> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-12 · **Change:** trivial (Groups with a small legacy child coordinate space draw outlines, dashes, arrowheads and ink at their own width (#233); previously major: created; formats taken from PowerPoint 16.113.4's Info.plist, PPTX coverage measured from `crates/pptx`) · **Target:** Microsoft PowerPoint for Mac 16.113 (Microsoft 365)
> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-13 · **Change:** minor (embedded fonts read, written and drawn; MicroType Express subsets kept but not drawn; previously trivial: groups with a small legacy child coordinate space, #233) · **Target:** Microsoft PowerPoint for Mac 16.113 (Microsoft 365)
Every format PowerPoint reads or writes, DeckCraft's support, fidelity and how it is tested.
Gaps are itemized in [gaps.md](gaps.md#file-formats). Dimension score: **~58% ready**
@@ -48,7 +48,7 @@ PowerPoint opens and saves; Viewer = opens only).
| Online video (YouTube embeds) | yes | no | Cloud feature |
| Embedded OLE objects | yes | kept on round trip (opaque), not insertable or editable | `ShapeKind::Opaque` |
| 3-D models (`.glb`) | yes | no | |
| Embedded fonts | yes | no | `p:embeddedFontLst` ignored |
| Embedded fonts | yes | yes | `p:embeddedFontLst` read and written. TrueType, OpenType and Embedded OpenType faces are used to draw; MicroType Express subsets are kept and written back, not drawn |
## PPTX coverage (PresentationML / DrawingML)
@@ -84,7 +84,7 @@ the round trip even though DeckCraft doesn't model it.
| Comments: modern threaded (`p188`) | yes | no (written as legacy) | Replies and resolved state lost (#70) |
| Unknown slide-level elements (`graphicFrame` OLE, extensions, `mc:AlternateContent`) | kept | kept | Rendered as a labelled placeholder with the preview picture when present |
| Tags, custom XML, VBA | no / no / no | | |
| Embedded fonts | no | no | |
| Embedded fonts | yes | yes | MicroType Express subsets kept, not drawn |
| Encryption (password to open) | no | no | |
### What would move the PPTX number
@@ -99,6 +99,7 @@ the round trip even though DeckCraft doesn't model it.
| Date | Change | Summary |
|---|---|---|
| 2026-10-13 | minor | Embedded fonts read and written; TrueType, OpenType and Embedded OpenType faces drawn |
| 2026-10-12 | minor | EMF/WMF text and pattern brushes drawn; OLE (VML) and ActiveX previews read |
| 2026-10-12 | minor | Text warps rendered; their adjust values read and written |
| 2026-10-12 | trivial | Groups with a small legacy child coordinate space draw outlines, dashes, arrowheads and ink at their own width (#233) |
docs/gaps.md
+5 -4
View File
@@ -1,6 +1,6 @@
# Where DeckCraft falls short of PowerPoint
> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-13 · **Change:** minor (3-D bevel, camera and face lighting rendered; previous: minor, IME composition and CJK interface text landed, #101; previous: minor, core-workflow alpha gate added; stage stays alpha; before that: major, first itemized gap list; full re-measure against PowerPoint for Mac 16.113.4 and the open GitHub issues) · **Target:** Microsoft PowerPoint for Mac 16.113 (Microsoft 365)
> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-13 · **Change:** minor (embedded fonts are read, written and drawn, except MicroType Express subsets; previous: minor, 3-D bevel, camera and face lighting rendered; previous: minor, IME composition and CJK interface text landed, #101) · **Target:** Microsoft PowerPoint for Mac 16.113 (Microsoft 365)
Every known shortfall, one entry each, ranked by how much it stops someone who presents with
PowerPoint from switching. This is the work list: pick from the top. Numbers are summarized in
@@ -121,9 +121,9 @@ Detail in [file-format-parity.md](file-format-parity.md).
- **Estimate:** 10–16 h (render the timeline frame by frame; an H.264 encoder is the hard part,
FilmCraft has one to copy).
### Embedded fonts aren't read or written
- **Evidence:** no `p:embeddedFontLst` handling in `crates/pptx`.
- **Impact:** decks that rely on embedded fonts reflow.
### Embedded MicroType Express font subsets aren't drawn
- **Evidence:** `p:embeddedFontLst` is read and written. A raw TrueType/OpenType face, or one inside an Embedded OpenType wrapper, is loaded and used to draw. A MicroType Express subset (`application/x-fontdata` with neither form) is kept and written back, and the text still uses a stand-in.
- **Impact:** decks that embed a MicroType subset reflow until that face is installed.
- **Estimate:** 3–5 h.
## Features
@@ -256,6 +256,7 @@ Detail in [localization-parity.md](localization-parity.md).
| Date | Change | Summary |
|---|---|---|
| 2026-10-13 | minor | Embedded fonts are read, written and drawn (TrueType, OpenType, Embedded OpenType). The gap is now MicroType Express subsets, which are kept but not drawn |
| 2026-10-13 | minor | Shape, picture and table rendering checked against PowerPoint on ~150 synthetic edge-case slides; 3-D bevels, cameras and face lighting now render approximately (gap narrowed to extrusion, rigs and the 3-D pane) |
| 2026-10-12 | minor | IME composition in slide text and notes, and CJK interface text with real glyphs (#101): the IME gap is now Korean on the web and table-cell underlines |
| 2026-10-12 | minor | EMF/WMF text, pattern and hatch brushes drawn; legacy OLE and ActiveX previews shown; the SVG gap keeps only EMF clip regions |
docs/roadmap.md
+3 -2
View File
@@ -1,6 +1,6 @@
# DeckCraft roadmap: milestones and what's next
> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-10 · **Change:** minor (core-workflow alpha gate added; stage stays alpha; previous: major, created; milestones carried from the local execution plan, the beta plan built from gaps.md) · **Target:** Microsoft PowerPoint for Mac 16.113 (Microsoft 365)
> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-13 · **Change:** trivial (embedded fonts leave the beta list except MicroType Express subsets; previous: minor, core-workflow alpha gate added; stage stays alpha) · **Target:** Microsoft PowerPoint for Mac 16.113 (Microsoft 365)
Forward-looking: where DeckCraft is going and in what order. The one-page summary is
[ROADMAP.md](../ROADMAP.md); every shortfall is in [gaps.md](gaps.md); numbers are in
@@ -40,7 +40,7 @@ Beta means ~75% ready for real work and opening and saving PowerPoint's `.pptx`
|---|---|---|---|
| 1 | Stability: #60, #40/#59, soak and fuzz the editor | 10–20 | Stability 60 → 85% |
| 2 | PPTX real-deck corpus and fixes | 20–35 | File formats 58 → 75% |
| 3 | PPTX round-trip losses (#70, #74, #77), `.potx`/`.ppsx`/`.pptm` content types, embedded fonts | 8–15 | File formats → 80% |
| 3 | PPTX round-trip losses (#70, #74, #77), `.potx`/`.ppsx`/`.pptm` content types, MicroType embedded-font subsets | 8–15 | File formats → 80% |
| 4 | EMF/WMF and SVG pictures | 8–14 | File formats, Pictures |
| 5 | Vector PDF, printing | 10–16 | File formats, Files |
| 6 | Localization infrastructure + zh-Hans, es, fr, de, ja (with IME) | 27–46 | Localization 8 → ~40% |
@@ -109,5 +109,6 @@ plan above.
| Date | Change | Summary |
|---|---|---|
| 2026-10-13 | trivial | Beta item 3: embedded fonts are in, except MicroType Express subsets |
| 2026-10-10 | minor | Added the alpha gate (six core workflows): all pass, two with partial depth; stage stays alpha |
| 2026-10-10 | major | Created: current focus, ranked beta plan with hours, milestones M0–M14 with status, the old alpha checklist as history |