svs 0.2.0

Streams and renders Aperio SVS whole-slide pathology images: pan/zoom, LOD tile streaming, JPEG & JPEG2000, no full-image load.

0.2.0

• readSvsRegion: crops an arbitrary rectangle of any pyramid level to a single composited image, stitching together only the tiles it overlaps. The rectangle may hang off the level's edges; the out-of-bounds part decodes transparent.
• encodeSvsImage, exportSvsRegion, exportAssociatedImage, exportSvsLevel: encode a decoded image (a crop, an associated image, or a whole pyramid level) to PNG, JPEG, BMP, TIFF, or WebP bytes, via the new image dependency. exportSvsLevel guards against accidentally compositing/encoding a gigapixel level whole. Each has a ...ToFile counterpart (exportSvsRegionToFile, exportAssociatedImageToFile, exportSvsLevelToFile) that writes straight to a path instead of returning bytes.

0.1.0

• Initial release.
• SvsFile: opens Aperio SVS (and generic tiled TIFF) files — resolution pyramid levels, associated images (thumbnail/label/macro), and parsed Aperio metadata (magnification, microns-per-pixel).
• SvsImageView: a pan/zoom widget streaming only the tiles the current viewport needs, at the resolution level matching the current zoom. Includes a minimap, zoom percentage, and a physical (µm/mm) scale bar.
• JPEG (Compression=7) and JPEG2000 (Compression=33005) tile decoding — JPEG2000 via the openjpeg_ffi package.
• Tile fetch and JPEG2000 decode run on background isolates; a memory-budgeted LRU tile cache responds to OS memory-pressure signals and actively cancels in-flight requests for tiles scrolled out of view.