`preview_plan`'s assertions sat inside the `header_plan == Ready` branch, so a NEF, an ORF or a PEF
— whose header probe reads samples and whose header plan is therefore `Whole` — never had its
preview plan looked at, and neither did any file the header plan declines. The display path wants
exactly that answer, so both plans are now asked for every corpus file, and the preview the plan
hands on must be the whole file's with the skipped bytes `0` and again `0xFF`; `Whole` stays a
legitimate answer (that format reads whole for a preview too) and is counted. The test prints what
each format reads for both plans.
Co-Authored-By: DeepSeek V3.2 <noreply@deepseek.com>
`lightcraft_raw::sparse::header_plan` says which byte ranges of a raw file the header
probe (`probe_info`, `lightcraft_meta::extract`) reads, given a buffer of the file's length
in which only some ranges are loaded: everything but the bulk sample data (large TIFF
strips/tiles minus the first chunk's coding headers, a CR3's image tracks minus the raw
track's CRX headers and QP maps, a RAF's CFA strip, an RW2's raw data). `preview_plan`
also reads what `embedded_preview` needs, for raws shown from their preview. NEF, ORF and
PEF (their header probe looks at samples) and anything else are read whole.
The corpus test checks, for every raw.pixls.us sample the plan describes, that probing the
partly loaded buffer gives exactly what the whole file gives, with the skipped bytes zero and
again 0xFF: CR3 2.7 %, DNG 2.4 %, CR2 3 %, RAF 6 %, RW2 7 %, ARW 8 % of their bytes.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
