Crate lerc 

Pure Rust implementation of the LERC (Limited Error Raster Compression) format.

Supports encoding and decoding of raster images with configurable lossy or lossless compression. Compatible with ESRI’s LERC2 format specification.

Re-exports

pub use error::LercError;

pub use error::Result;

pub use types::DataType;

pub use types::Sample;

Modules

bitmask

Validity bitmask for tracking valid/invalid pixels.

checksum

Fletcher-32 checksum used by the LERC2 format.

error

Error types for LERC encoding and decoding.

types

Pixel data types and the Sample trait for type-safe encoding/decoding.

Structs

DecodeResult

Metadata returned from a decode-into operation (no owned pixel data).

DecodedSlice

Decoded pixel data and metadata returned by decode_slice.

Image

A decoded raster image with pixel data and validity masks.

LercInfo

Header metadata extracted from a LERC blob without decoding pixel data.

Enums

Precision

Controls the precision/error tolerance for LERC encoding.

SampleData

Type-erased pixel data container, one variant per supported data type.

Functions

decode

Decode a LERC blob, returning the image with pixel data and validity masks.

decode_info

Read header metadata from a LERC blob without decoding pixel data.

decode_into

Decode a LERC blob into a pre-allocated buffer, returning metadata.

decode_into_with_nodata

Decode a LERC blob into a pre-allocated buffer, filling invalid pixels with a caller-supplied sentinel value.

decode_slice

Decode a single-band, single-depth LERC blob into a DecodedSlice<T> containing the typed pixel data, validity mask, and image dimensions.

encode

Encode an image into a LERC blob with the given precision.

encode_borrowed

Zero-copy multi-band encode entry point.

encode_slice

Encode a single-band image with all pixels valid.

encode_slice_masked

Encode a single-band image with a validity mask.