The X2D II 100C's 3FR files develop at full sensor resolution instead of
falling back to the camera's embedded JPEG preview. A 3FR is a TIFF whose
IFD0 holds the camera's JPEG and whose CFA image sits in a SubIFD with
DNG-style tags but no DNGVersion and no CFA-pattern tag (neither the
TIFF/EP pair nor the EXIF one), which is why the generic TIFF/EP path
reported "CFA pattern not recorded". The new decoder reuses the shared
strip reader, takes BlackLevel, WhiteLevel, DefaultCropOrigin/Size and
AsShotNeutral from the file, and takes the Bayer phase from a measured
per-body table (the X2D II 100C: RGGB at the data origin, measured
against the camera's own embedded JPEG; unmeasured bodies warn).
Lossless-JPEG 3FR stays preview-only, like uncompressed-only ORF and RAF
before it.
Clean-room: the TIFF 6.0 and DNG specifications, the sample file's bytes
and its embedded JPEG; no code or tables from dcraw, LibRaw, rawspeed,
rawler or darktable.
Adds round-trip and hostile tests through a mirrored synthetic builder
(tests/it/hasselblad.rs, testgen::Hasselblad3frSpec) and updates the
support matrix (file-format-parity, gaps G14, target-app-parity).
Gotya-OFFCIAL
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