3 people 284724af37 TIFF: alpha after an unspecified extra sample opens transparent (#1349) (#1513) ...

TIFF 6.0 allows the alpha at any ExtraSamples position, but the decoder
only looked at the first extra sample, and for RGB/CMYK the tiff crate
drops every sample after its colour type. With ExtraSamples [0, 2] the
alpha was silently lost (and gray [0, 2] opened as plain gray).

The alpha is now the first extra sample marked associated (1) or
unassociated (2), wherever it is. When it is not the first extra sample
of an RGB or CMYK image, the crate is asked for every sample (the
photometric is patched to multiband gray, as for WhiteIsZero) and the
colour and alpha samples are picked per chunk; planar files read the
alpha's own plane. Associated alpha in that position is made straight.

Co-authored-by: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

2026-10-09 11:12:00 +07:00

..

codecs

TIFF: alpha after an unspecified extra sample opens transparent (#1349) (#1513)

2026-10-09 11:12:00 +07:00

error.rs

Format: adopt the craft-family rustfmt.toml and format the workspace

2026-10-04 11:31:17 -04:00

fidelity.rs

Lossy WebP: a pure-Rust VP8 encoder with quality and lossless controls (#648) (#880)

2026-10-07 21:12:38 -04:00

format.rs

Open HEIC/HEIF photos (#355) (#372)

2026-10-07 10:20:40 -04:00

image.rs

Layered TIFF: open and save Photoshop layer data in TIFF files, in either byte order (part of #215) (#672)

2026-10-07 17:10:35 -04:00

lib.rs

TIFF: BigTIFF, every IFD and SubIFD, banded parallel decode (FILE-215-8, part of #215) (#859)

2026-10-07 22:37:51 -04:00

options.rs

Fix PNG text metadata decode budget bypass (#1460)

2026-10-09 09:02:07 +07:00

orientation.rs

fix(codecs): correct TIFF polarity and BigTIFF orientation (#746)

2026-10-07 13:50:04 -07:00

web.rs

Format: adopt the craft-family rustfmt.toml and format the workspace

2026-10-04 11:31:17 -04:00