* Flat exports embed no document XMP by default; Export As gains a Metadata choice (#647)
The document's XMP packet lists the text of every type layer
(photoshop:TextLayers) and one id per placed document
(photoshop:DocumentAncestors) - data a flat web image should not carry:
14-116 KB per export on real designer PSDs, and layer text leaking into
images that show only part of the design.
- io: ExportOptions.xmp (XmpEmbed::All | None, default None) drops the
packet from flat exports before the codecs see it. Layered saves
(PSD, PSB, .pcraft) always keep everything; DPI, ICC and EXIF are
unaffected. Export As, Save a Copy, the CLI, Layers/Artboards to
Files and Batch all share this path and get the safe default.
- The Export As dialog gains a Metadata dropdown (None / All, default
None, like the source application's Export As); the file-size
estimate follows the choice.
- Tests: new xmp_export.rs covers the default (png/jpg/webp/tif carry
no packet), the All opt-in and the layered always-keep;
metadata_roundtrip_png and the stale-orientation test document the
new contract (with All, an embedded stale orientation is still
rewritten upright).
* Export As alone starts at Metadata: None; Save As and conversions keep the XMP
ExportSettings::default() and ExportOptions::default() also serve File > Save As, file.saveAs,
the CLI and automation, which keep the document's metadata (as Photoshop's Save As does).
Only the Export As dialog defaults to None. A layered TIFF honours the choice too.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
---------
Co-authored-by: Brandon Thomas <echelon@gmail.com>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
