* craft-heif: a metadata feature that reads Exif and XMP without heic-rs
The decoder is now the default feature decode, and heic-rs and rayon are
optional. The new metadata feature adds items::read: the first Exif item
and the XMP mime item from the box structure alone (iinf, iloc, idat), with
limits on boxes, items, extents and item size, moved from LightCraft's
lightcraft-meta. Built with --no-default-features --features metadata the
crate has no heic-rs dependency and read_metadata is that reader; default
builds are unchanged. With both features a test checks that the two readers
agree on synthetic files.
* craft-heif: keep #[cfg(test)] on the test modules so clippy treats them as tests
#[cfg(all(test, feature = "decode"))] hid the test cfg from clippy's
allow-unwrap-in-tests, so the helpers in tests_icc.rs and tests_synthetic.rs
failed all-targets clippy. The modules now carry #[cfg(test)] and
#[cfg(feature = "decode")] as two attributes.
* craft-heif: stills decode at the size the container declares
A coded HEVC picture is a whole number of coding blocks and can be larger
than the image the container's ispe declares (Sony codes 1920x1080 as
1920x1088 without a conformance window). decode returned the coded size,
so probe and decode disagreed and the padding rows showed as a dark band.
decode_item now crops to ispe before the alpha merge and the transforms,
measures the clap parity on the declared size, and compares the alpha
item's declared size with the picture's instead of the coded planes.
A declared size larger than the coded picture is Malformed.
Ported from storytold/lightcraft#3977.
* craft-heif: read_metadata reads the primary image's EXIF and XMP without decoding
Cataloguing a photo needs its EXIF and XMP, not its pixels. read_metadata
opens the container under the same panic guard and box census as probe
and returns what decode would attach.
Ported from storytold/lightcraft#2087.
* craft-heif testdata: Spec::stereo builds a spatial photo (grpl/ster entity group)
A second image of the primary's size and a ster entity group naming both,
so callers can test stereo detection on a file this crate decodes.
Ported from storytold/lightcraft#1684.
* craft-heif: put_alpha uses is_multiple_of
---------
Co-authored-by: Mason <mason276752@gmail.com>
Co-authored-by: jkalkstein <76634771+jkalkstein@users.noreply.github.com>
Co-authored-by: Mitch Lindgren <mitch@lindg.ren>
* craft-heif: cap hvcC parameter sets and tiles, count alpha-grid tiles in the visit budget
* craft-heif: charge every tile reference of a thumbnail candidate to the visit budget
Moved from lightcraft-heif (lightcraft b188295e), the more complete of the
two copies: libheif-matching YCbCr conversion from the VUI, monochrome,
thumbnails and the box caps. PhotoCraft's grid-tile ICC inheritance tests
are ported to it.
Part of #778. Closes#784 once both apps switch.
Dylan M. Taylor
