24 releases
0.13.1 | Jan 23, 2024 |
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0.12.0 | Nov 17, 2022 |
0.11.4 | Jun 27, 2022 |
0.11.3 | Oct 14, 2021 |
0.5.0 | Jun 5, 2015 |
#15 in Images
1,328,200 downloads per month
Used in 2,007 crates
(75 directly)
105KB
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SLoC
GIF en- and decoding library
GIF en- and decoder written in Rust (API Documentation).
GIF encoding and decoding library
This library provides all functions necessary to de- and encode GIF files.
High level interface
The high level interface consists of the two types
Encoder
and Decoder
.
Decoding GIF files
// Open the file
use std::fs::File;
let input = File::open("tests/samples/sample_1.gif").unwrap();
// Configure the decoder such that it will expand the image to RGBA.
let mut options = gif::DecodeOptions::new();
options.set_color_output(gif::ColorOutput::RGBA);
// Read the file header
let mut decoder = options.read_info(input).unwrap();
while let Some(frame) = decoder.read_next_frame().unwrap() {
// Process every frame
}
Encoding GIF files
The encoder can be used to save simple computer generated images:
use gif::{Frame, Encoder, Repeat};
use std::fs::File;
use std::borrow::Cow;
let color_map = &[0xFF, 0xFF, 0xFF, 0, 0, 0];
let (width, height) = (6, 6);
let beacon_states = [[
0, 0, 0, 0, 0, 0,
0, 1, 1, 0, 0, 0,
0, 1, 1, 0, 0, 0,
0, 0, 0, 1, 1, 0,
0, 0, 0, 1, 1, 0,
0, 0, 0, 0, 0, 0,
], [
0, 0, 0, 0, 0, 0,
0, 1, 1, 0, 0, 0,
0, 1, 0, 0, 0, 0,
0, 0, 0, 0, 1, 0,
0, 0, 0, 1, 1, 0,
0, 0, 0, 0, 0, 0,
]];
let mut image = File::create("target/beacon.gif").unwrap();
let mut encoder = Encoder::new(&mut image, width, height, color_map).unwrap();
encoder.set_repeat(Repeat::Infinite).unwrap();
for state in &beacon_states {
let mut frame = Frame::default();
frame.width = width;
frame.height = height;
frame.buffer = Cow::Borrowed(&*state);
encoder.write_frame(&frame).unwrap();
}
Frame::from_*
can be used to convert a true color image to a paletted
image with a maximum of 256 colors:
use std::fs::File;
// Get pixel data from some source
let mut pixels: Vec<u8> = vec![0; 30_000];
// Create frame from data
let frame = gif::Frame::from_rgb(100, 100, &mut *pixels);
// Create encoder
let mut image = File::create("target/indexed_color.gif").unwrap();
let mut encoder = gif::Encoder::new(&mut image, frame.width, frame.height, &[]).unwrap();
// Write frame to file
encoder.write_frame(&frame).unwrap();
Dependencies
~130KB