Relocate the ROI definitions and the roi_map bitmap from /entry/roi to a
separate /entry/roi_defs group in the master file. /entry/roi keeps its
original meaning (per-image ROI results only), so an older reader that
iterates /entry/roi is not disturbed by the bitmap/definition entries
(which would otherwise make it try to read /entry/roi/roi_map/max and
fail to open the file at all). Back-compatibility for already-deployed
viewers is the reason for the split.
JFJochHDF5Reader now reads the logical definitions into experiment.ROI()
and the roi_map bitmask (+ a name->bit index) into the dataset, for all
file formats (the master always carries them). Reading both lets a later
viewer either re-derive ROIs with the current geometry (logical) or show
the exact written footprint (bitmap).
Added a write/read round-trip test over VDS and integrated formats.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
leonarski_fandClaude Opus 4.8
c6e7f8aa15