Crate pnm

crate for decoding/encoding the portable anymap format.

a quick guide to the various functions for everyday use

• decode(): your go-to for all PNM image decoding. If you have a specific format you need to support, use its module directly. Note that this function reads both plain and raw formats.
• encode(): this function is a little tricky. It supports the “older” PNM formats, and, due to their age they do not support the alpha channels existence. If possible, use pam::encode instead.
• encode_plain: The PAM format doesnt actually support read-age-by-humans, so this is still useful at times. Outputs data in decimal digits.

functions in action

let data = include_bytes!("../tdata/fimg-rainbowR.ppm");
let out = pnm::decode(data).unwrap();

assert_eq!(pnm::encode(out), data);

Re-exports

• pub use pam::PAM;

Modules

• decode
  decoding utilities
• pam
  Portable Arbitrary Format RGB (no alpha) image encoding and decoding.
• pbm
  Portable BitMap Format black and white image encoding and decoding.
• pgm
  Portable GreyMap Format grey image encoding and decoding.
• ppm
  Portable PixMap Format RGB (no alpha) image encoding and decoding.

Functions

• decode
  Decode any pgm, ppm, pbm, pam image.
• encode
  Encodes an image to one of the pgm or ppm portable anymap formats.
• encode_plain
  Encodes an image to one of the pgm or ppm portable anymap formats.