https://github.com/fwcd/swift-gif

Cross-platform GIF encoder and decoder for Swift
https://github.com/fwcd/swift-gif

animated-gif hacktoberfest linux lzw-compression swift

Last synced: 6 months ago
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Cross-platform GIF encoder and decoder for Swift

• Host: GitHub
• URL: https://github.com/fwcd/swift-gif
• Owner: fwcd
• License: mit
• Created: 2020-09-29T21:12:42.000Z (about 5 years ago)
• Default Branch: main
• Last Pushed: 2025-02-17T01:17:17.000Z (8 months ago)
• Last Synced: 2025-04-14T01:18:00.128Z (6 months ago)
• Topics: animated-gif, hacktoberfest, linux, lzw-compression, swift
• Language: Swift
• Homepage: https://fwcd.github.io/swift-gif/documentation/gif
• Size: 3.02 MB
• Stars: 19
• Watchers: 2
• Forks: 2
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# GIF Coder for Swift

[![Build](https://github.com/fwcd/swift-gif/actions/workflows/build.yml/badge.svg)](https://github.com/fwcd/swift-gif/actions/workflows/build.yml)

[![Docs](https://github.com/fwcd/swift-gif/actions/workflows/docs.yml/badge.svg)](https://fwcd.github.io/swift-gif/documentation/gif)

A lightweight LZW encoder and decoder for animated GIFs written in pure Swift, thus running on any platform, including Linux.

## Example

```swift

// Create a new GIF

var gif = GIF(width: 300, height: 300)

// Add some frames for the animation

for i in 0..<20 {

    let image = try CairoImage(pngFilePath: "frame\(i).png")

    gif.frames.append(.init(image: image, delayTime: 100))

}

// Encode the GIF to a byte buffer

let data = try gif.encoded()

```

## Technical Details

GIF encoding is more computationally intensive than decoding. It can become a bottleneck when GIF is used as a video codec and serialization must happen in real-time. Therefore, multicore CPU is used to accelerate the encoding of animated GIFs. All the animation frames are gathered into one `Array`, which is then divided among all CPU cores in the system.

## System Dependencies

* Swift 5.10+

* Cairo, see [swift-graphics](https://github.com/fwcd/swift-graphics)