vangel76andClaude Sonnet 5.5
cf22417c1a
One decode_plane for raw/RLE/ZIP (decode_channel and composite), placed::eight and quad_from for the SoLd/PlLd transforms, the writer's big-endian and UTF-16 helpers from descriptor.rs, one delimiter const in engine_data.rs, and the dead binding in write.rs. No behaviour change; adds ZIP and RLE composite tests. Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
effectcraft-psd
Reads Photoshop documents (.psd, and .psb large documents) for File ▸ Import (as footage, as a
composition, or as a composition with layer sizes retained), and writes a minimal subset (used to
generate test fixtures).
Implemented from Adobe's public Adobe Photoshop File Formats Specification (November 2019
edition): file header, colour mode data, image resources, layer and mask information (layer
records, channel image data, layer mask data, additional layer information: luni, lsct/lsdk,
lyid, iOpa, TySh, lfx2, SoCo, nvrt, brit, hue2, levl, expA, vmsk/vsms,
Lr16/Lr32, smart objects: SoLd/SoLE/PlLd placement and lnk2/lnkD/lnk3/lnkE
linked layer data with embedded files), the descriptor (action) structure, and the merged image data. Raw, RLE (PackBits)
and ZIP (with and without prediction, inflated with miniz_oxide) compression; 1/8/16/32-bit;
Bitmap, Grayscale, Indexed, RGB, CMYK (naive conversion) and Lab colour modes.
Text engine data (EngineData) is read best-effort for the font, size, fill colour and
justification of the first style run. Smart objects import as footage of their embedded file
(a Photoshop document's merged image, or an image) placed by the smart object's corner quad
(position, scale, rotation). A non-affine quad (nonAffineTransform: perspective) or a placed
layer warp (warp: the named styles with bend and horizontal / vertical distortion, and custom
envelope warps whose quilt mesh of bicubic Bezier patches is read from meshPoints (ObAr)
and quiltSliceX / quiltSliceY) is baked as placed over the placed bounds, at up to 4x the
document resolution (placed). Custom meshes are evaluated exactly; the
named styles' curves are not published, so they are clean-room geometric definitions matching
each style by behaviour. Externally linked files
fall back to the layer's rendered pixels. No Adobe code, sample files or assets were used; test
fixtures are generated in-test by the writer in this crate (write).