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radialmonster
dbe73f0f9c
Widens the preview-only fallback. A recognised raw whose decode fails now falls back to its embedded JPEG for any decode error (unsupported, corrupt, limit, TIFF structure), not only an unsupported variant, and the preview search covers more containers: - Canon CRW, Minolta MRW and Sigma X3F are recognised by their magic (RawFormat Crw, Mrw, X3f) instead of failing as "RawOther files are not supported yet". - A TIFF whose IFD0 has no ImageWidth/ImageLength but a JPEG pointer or SubIFDs (Kodak KDC) is a raw container, not a malformed image. TIFF compression 99 (Leaf MOS) counts as a raw compression. - When no tag points to a preview, a recognised raw we cannot decode is scanned for the largest complete three-component DCT JPEG. A preview whose first byte was overwritten (Minolta, Epson) is restored. A one-component JPEG is skipped (a PowerShot CRW stores its mosaic that way). Files with no JPEG at all still fail with "without an embedded preview".