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M4.94: EMF and WMF export from Export As and document.export

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New crates/metafile (L3, pure Rust): hand-written EMF and WMF writers over
one shared document walk. EMF keeps Bezier paths, solid brushes, geometric
pens (width, caps, joins, miter limit, user-style dashes), clipping masks as
path clips, images (StretchDIBits, or AlphaBlend with transparency) placed by
a world transform, type as outlines; gradients become images clipped to their
shape and pattern fills their tiles clipped to it. The header's frame is the
artboard in 0.01 mm on a 100 px/mm reference device. WMF flattens curves into
polygons in 16-bit units behind a placeable header (with its checksum),
numbers objects as players do, and reports what it leaves out (clipping,
transparency, gradients, rotated images).

document.export {format: emf|wmf} (and serialize, export) writes one artboard,
or one file per artboard with useArtboards (false: the art's bounds); raster
effects are rendered to images first, as for PDF. Export As lists EMF and WMF.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
bflatastic
2026-10-05 15:24:24 +07:00
co-authored by Claude Opus 5.5
parent 2e6585d7ea
commit ab1c6b0516
23 changed files with 2234 additions and 6 deletions
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docs/control-protocol.md
+3
View File
@@ -361,3 +361,6 @@ Native save options: File → Save As to a native or `.ai` file opens the `saveO
artboard; false: `range`, such as "1-3, 5"), `includeLinked`, `embedProfiles`, `pdfCompatible`, `compress`, and for
native files `version` and `preview`. A bad range keeps the dialog open; `ui.dialog.confirm` writes the file and the
artboards' files.
EMF and WMF: Export As… lists both formats (`file.exportAs {format: "emf"}` or `"wmf"`); they have no options
dialog, so `ui.dialog.confirm` asks for the path and writes the file (one per artboard with Use Artboards).
docs/mcp.md
+17
View File
@@ -1338,3 +1338,20 @@ and Save as Template reuse the options as last saved (or Use Compression).
{"name":"run_command","arguments":{"command":"file.saveAs","params":{"path":"/tmp/set.vectorcraft","separateArtboards":true,"range":"2-3","includeLinked":true}}}
{"name":"run_command","arguments":{"command":"file.saveAs","params":{"path":"/tmp/set.ai","pdfCompatible":false}}}
```
## EMF and WMF
`document.export` (and `export`) with format `emf` or `wmf` writes a Windows metafile of the first artboard (or
`artboard`); `useArtboards: true` writes one file per chosen artboard (`{stem}-{artboard}.emf`), `false` the bounds of
the visible art. EMF keeps Bézier curves, solid fills (brushes), strokes as geometric pens with their width, caps,
joins, miter limit and dashes, clipping masks (path clips), images with their transparency (AlphaBlend) and type as
outlines; gradients become images clipped to their shape, pattern fills their tiles clipped to the shape, and raster
effects images rendered at the document's raster effects resolution. The header's frame is the artboard in 0.01 mm.
WMF flattens curves into polygons in 16-bit units behind a placeable header (1440 units an inch, fewer for pictures
over about 22 inches); it has no clipping, transparency or gradients, so clipped art is written whole, images over
white and gradients and patterns as one colour. What a format leaves out comes back in `warnings`.
```json
{"name":"export","arguments":{"path":"/tmp/logo.emf"}}
{"name":"run_command","arguments":{"command":"document.export","params":{"format":"wmf","useArtboards":true,"path":"/tmp/icons.wmf"}}}
```