Gif encoder/decoder based on GIF89a specification.

Decode a gif file using ColorMap color output mode.

let file = &mut File::open(Path::new("./ascii-gif-example.gif")).unwrap();
let gif = decode(file, ColorOutput::ColorMap).unwrap();

Decode a gif file using RGBA color output mode.

let file = &mut File::open(Path::new("./ascii-gif-example.gif")).unwrap();
let gif = decode(file, ColorOutput::RGBA).unwrap();

• handle interlaced flag
• handle disposal method
• handle user input
• support more extension blocks
• decoding optimization
• implements gif encoding