otf-pixels-compress

DEFLATE, zlib, LZW and checksums, in safe Rust

The compression the Pixels codecs share: PNG and TIFF use zlib, GIF and TIFF use LZW. Every decoder takes an output limit, so a decompression bomb is an error.

Use it

use otf_pixels_compress::{Crc32, Level, zlib_compress, zlib_decompress};

let data = b"hello hello hello hello";
let packed = zlib_compress(data, Level::new(6)?)?;
let unpacked = zlib_decompress(&packed, 1 << 20)?; // refuses more than 1 MiB
assert_eq!(unpacked, data);
let checksum = Crc32::of(data);

API

Item	What it does
`zlib_compress`, `deflate`, `Level`	Compress, zlib-wrapped or raw, levels 0–9
`zlib_decompress`, `inflate_to`	Decompress a whole buffer, up to a byte limit
`ZlibStream`, `Inflater`	Decompress incrementally, as input arrives
`LzwEncoder`, `LzwDecoder`, `BitOrder`	LZW in GIF (LSB-first) or TIFF (MSB-first) order
`Crc32`, `Adler32`	The checksums PNG and zlib use

Output is checked against the reference zlib, both ways.

Part of Pixels

Crate	Role
`otf-pixels`	The chainable `Image` API most users want
`otf-pixels-core`	Graph, tiles, scheduler, codec and op traits
`otf-pixels-ops`	Image operations
`otf-pixels-compress`	DEFLATE, zlib, LZW, checksums
`otf-pixels-codec-*`	One crate per format

License

Apache-2.0 — see LICENSE.

otf-pixels-compress 0.2.0

otf-pixels-compress

Use it

API

Part of Pixels

License