internal/

Package bifxml parses the XMP metadata embedded in Ventana BIF TIFF IFDs.

Package cog parses the GDAL Cloud Optimized GeoTIFF ghost-area (the contiguous block of ASCII key-value metadata immediately following the TIFF header).

Package dzi parses the Microsoft Deep Zoom Image (DZI) manifest XML format and computes per-level / per-tile coordinate information.

Package fastpath holds dispatch sentinel errors shared between the opentile root and format-specific readers.

Package format defines the internal Reader interface every opentile-go format implementation provides.

Package jpeg provides marker-level JPEG bitstream manipulation sufficient to assemble valid JPEGs from TIFF-embedded scan fragments.

Package jpegturbo provides a minimal cgo wrapper over libjpeg-turbo's tjTransform operation, scoped to the lossless MCU-aligned JPEG crop that opentile-go needs for one-frame NDPI pyramid levels and NDPI label cropping.

Package oneframe provides shared infrastructure for reading "single big JPEG, virtualised into tile cells" pyramid pages — used by NDPI's non-tiled levels (formats/ndpi/oneframe.go pre-v0.6) and OME-TIFF's reduced-resolution levels (formats/ometiff/oneframe.go in v0.6).

Package tiff parses a minimal subset of the TIFF file format sufficient to locate compressed tile byte ranges for whole-slide imaging TIFFs.

Package tifflzw implements the Lempel-Ziv-Welch compressed data format as used by the TIFF file format, including the "off by one" code-width transition that makes TIFF LZW incompatible with stdlib compress/lzw.