e11db8fea0
`lightcraft_codecs::gainmap`: - `compute` measures a gain map (luminance or RGB, log2, block-averaged) from an SDR and an HDR rendition; `apply` rebuilds the HDR rendition. - ISO 21496-1 metadata: writer (fixed denominator) and reader (also the common-denominator form; refuses unknown versions, backward maps and zero denominators). Adobe `hdrgm` XMP reader and writer, per-channel values as rdf:Seq; Apple's HDRGainMap/HDRToneMap description of the same map. - `encode_jpeg`: base with CIPA DC-007 MPF index (gain map typed 0x050000), the ISO marker and Container XMP merged into the user's packet, followed by the gain map JPEG. `read_jpeg` / `is_gain_map_jpeg` find and decode the map. Also: gain map images are no longer picked as embedded thumbnails (an Ultra HDR JPEG could show its greyscale gain map in the grid). The JPEG APP-segment building is shared with `encode_jpeg`. Fuzzed with the other decoders. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> |
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| .. | ||
| bench.rs | ||
| corpus.rs | ||
| fuzz.rs | ||
| header.rs | ||
| roundtrip.rs | ||