Mezzotint and Color Halftone applied as smart filters were dropped from PSD
saves with a warning, and the same filters in a Photoshop PSD opened as
unsupported (verbatim) smart filters. smart_map.rs now maps them both ways:
- Mezzotint: filterID/class `Mztn`, `MztT` enum (FnDt, MdmD, GrnD, CrsD,
ShrL, MdmL, LngL, ShSt, MdmS, LngS) <-> `type` (fineDots .. longStrokes).
PhotoCraft's `seed` has no Photoshop equivalent and is not saved.
- Color Halftone: filterID/class `ClrH`, `Rds ` and `Ang1`-`Ang4` longs <->
`maxRadius`, `channel1`-`channel4`, written within the dialog ranges
(4..127, -360..360).
Unknown enum codes, wrong value types and out-of-range values are kept
verbatim as unsupported filters, never a panic.
Measured in Photoshop: applied through Action Manager to a smart object,
saved, filterFX read back; codes confirmed by rendering each option.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
