A lightweight LZW encoder and decoder for animated GIFs written in pure Swift, thus running on any platform, including Linux.
// 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(){
"name": "swift-gif",
"path": "/usr/src/package",
"targets": [
{
"name": "GIFTests",
"path": "Tests/GIFTests",
"type": "test",
"c99name": "GIFTests",
"sources": [
"TestLogBootstrap.swift",
"code/GIFCoderTests.swift",
"lzw/LzwCoderTests.swift",
"utils/BitDataTests.swift",
"utils/PackedFieldByteTests.swift"
],
"resources": [
{
"path": "/usr/src/package/Tests/GIFTests/Resources",
"rule": {
"copy": {}
}
}
],
"module_type": "SwiftTarget",
"target_dependencies": [
"GIF"
]
},
{
"name": "GIFInspector",
"path": "Sources/GIFInspector",
"type": "executable",
"c99name": "GIFInspector",
"sources": [
"main.swift"
],
"module_type": "SwiftTarget",
"product_memberships": [
"GIFInspector"
],
"target_dependencies": [
"GIF"
],
"product_dependencies": [
"ArgumentParser",
"Logging"
]
},
{
"name": "GIFDemoGenerator",
"path": "Sources/GIFDemoGenerator",
"type": "executable",
"c99name": "GIFDemoGenerator",
"sources": [
"main.swift"
],
"module_type": "SwiftTarget",
"product_memberships": [
"GIFDemoGenerator"
],
"target_dependencies": [
"GIF"
],
"product_dependencies": [
"ArgumentParser",
"Logging",
"Utils",
"CairoGraphics"
]
},
{
"name": "GIF",
"path": "Sources/GIF",
"type": "library",
"c99name": "GIF",
"sources": [
"GIFCodingExtensions.swift",
"code/GIFCodingUtils.swift",
"code/GIFConstants.swift",
"code/GIFDecoder.swift",
"code/GIFDecodingError.swift",
"code/GIFEncoder.swift",
"code/GIFEncodingError.swift",
"lzw/LzwCodingError.swift",
"lzw/LzwDecoder.swift",
"lzw/LzwDecoderTable.swift",
"lzw/LzwEncoder.swift",
"lzw/LzwEncoderTable.swift",
"lzw/LzwTableMeta.swift",
"model/ApplicationExtension.swift",
"model/DisposalMethod.swift",
"model/Frame.swift",
"model/GIF.swift",
"model/GraphicsControlExtension.swift",
"model/ImageDescriptor.swift",
"model/LogicalScreenDescriptor.swift",
"quantize/ColorQuantization.swift",
"quantize/OctreeQuantization.swift",
"quantize/UniformQuantization.swift",
"utils/BitData.swift",
"utils/DataUtils.swift",
"utils/GIFLogHandler.swift",
"utils/PackedFieldByte.swift"
],
"module_type": "SwiftTarget",
"product_memberships": [
"GIF",
"GIFInspector",
"GIFDemoGenerator"
],
"product_dependencies": [
"Logging",
"Utils",
"CairoGraphics"
]
}
],
"products": [
{
"name": "GIF",
"type": {
"library": [
"automatic"
]
},
"targets": [
"GIF"
]
},
{
"name": "GIFInspector",
"type": {
"executable": null
},
"targets": [
"GIFInspector"
]
},
{
"name": "GIFDemoGenerator",
"type": {
"executable": null
},
"targets": [
"GIFDemoGenerator"
]
}
],
"platforms": [
{
"name": "macos",
"version": "13.0"
}
],
"dependencies": [
{
"url": "https://github.com/apple/swift-log.git",
"type": "sourceControl",
"identity": "swift-log",
"requirement": {
"range": [
{
"lower_bound": "1.4.0",
"upper_bound": "2.0.0"
}
]
}
},
{
"url": "https://github.com/fwcd/swift-utils.git",
"type": "sourceControl",
"identity": "swift-utils",
"requirement": {
"range": [
{
"lower_bound": "3.0.0",
"upper_bound": "4.0.0"
}
]
}
},
{
"url": "https://github.com/fwcd/swift-graphics.git",
"type": "sourceControl",
"identity": "swift-graphics",
"requirement": {
"range": [
{
"lower_bound": "3.0.1",
"upper_bound": "4.0.0"
}
]
}
},
{
"url": "https://github.com/apple/swift-argument-parser.git",
"type": "sourceControl",
"identity": "swift-argument-parser",
"requirement": {
"range": [
{
"lower_bound": "0.3.1",
"upper_bound": "0.4.0"
}
]
}
}
],
"tools_version": "5.7",
"manifest_display_name": "swift-gif"
}
{
"name": "swift-gif",
"targets": [
{
"name": "GIF",
"type": "regular",
"exclude": [],
"settings": [],
"resources": [],
"dependencies": [
{
"product": [
"Logging",
"swift-log",
null,
null
]
},
{
"product": [
"Utils",
"swift-utils",
null,
null
]
},
{
"product": [
"CairoGraphics",
"swift-graphics",
null,
null
]
}
],
"packageAccess": false
},
{
"name": "GIFInspector",
"type": "executable",
"exclude": [],
"settings": [],
"resources": [],
"dependencies": [
{
"product": [
"ArgumentParser",
"swift-argument-parser",
null,
null
]
},
{
"product": [
"Logging",
"swift-log",
null,
null
]
},
{
"target": [
"GIF",
null
]
}
],
"packageAccess": false
},
{
"name": "GIFDemoGenerator",
"type": "executable",
"exclude": [],
"settings": [],
"resources": [],
"dependencies": [
{
"product": [
"ArgumentParser",
"swift-argument-parser",
null,
null
]
},
{
"product": [
"Logging",
"swift-log",
null,
null
]
},
{
"product": [
"Utils",
"swift-utils",
null,
null
]
},
{
"product": [
"CairoGraphics",
"swift-graphics",
null,
null
]
},
{
"target": [
"GIF",
null
]
}
],
"packageAccess": false
},
{
"name": "GIFTests",
"type": "test",
"exclude": [],
"settings": [],
"resources": [
{
"path": "Resources",
"rule": {
"copy": {}
}
}
],
"dependencies": [
{
"target": [
"GIF",
null
]
}
],
"packageAccess": false
}
],
"products": [
{
"name": "GIF",
"type": {
"library": [
"automatic"
]
},
"targets": [
"GIF"
]
},
{
"name": "GIFInspector",
"type": {
"executable": null
},
"targets": [
"GIFInspector"
]
}
],
"pkgConfig": null,
"platforms": [
{
"options": [],
"version": "13.0",
"platformName": "macos"
}
],
"providers": null,
"packageKind": {
"root": [
"/usr/src/package"
]
},
"dependencies": [
{
"sourceControl": [
{
"identity": "swift-log",
"location": {
"remote": [
{
"urlString": "https://github.com/apple/swift-log.git"
}
]
},
"requirement": {
"range": [
{
"lowerBound": "1.4.0",
"upperBound": "2.0.0"
}
]
},
"productFilter": null
}
]
},
{
"sourceControl": [
{
"identity": "swift-utils",
"location": {
"remote": [
{
"urlString": "https://github.com/fwcd/swift-utils.git"
}
]
},
"requirement": {
"range": [
{
"lowerBound": "3.0.0",
"upperBound": "4.0.0"
}
]
},
"productFilter": null
}
]
},
{
"sourceControl": [
{
"identity": "swift-graphics",
"location": {
"remote": [
{
"urlString": "https://github.com/fwcd/swift-graphics.git"
}
]
},
"requirement": {
"range": [
{
"lowerBound": "3.0.1",
"upperBound": "4.0.0"
}
]
},
"productFilter": null
}
]
},
{
"sourceControl": [
{
"identity": "swift-argument-parser",
"location": {
"remote": [
{
"urlString": "https://github.com/apple/swift-argument-parser.git"
}
]
},
"requirement": {
"range": [
{
"lowerBound": "0.3.1",
"upperBound": "0.4.0"
}
]
},
"productFilter": null
}
]
}
],
"toolsVersion": {
"_version": "5.7.0"
},
"cLanguageStandard": null,
"cxxLanguageStandard": null,
"swiftLanguageVersions": null
}
{
"url": "/usr/src/package",
"name": "swift-gif",
"path": "/usr/src/package",
"version": "unspecified",
"identity": "package",
"dependencies": [
{
"url": "https://github.com/apple/swift-log.git",
"name": "swift-log",
"path": "/usr/src/package/.build/checkouts/swift-log",
"version": "1.5.4",
"identity": "swift-log",
"dependencies": []
},
{
"url": "https://github.com/fwcd/swift-utils.git",
"name": "swift-utils",
"path": "/usr/src/package/.build/checkouts/swift-utils",
"version": "3.0.0",
"identity": "swift-utils",
"dependencies": [
{
"url": "https://github.com/scinfu/SwiftSoup.git",
"name": "SwiftSoup",
"path": "/usr/src/package/.build/checkouts/SwiftSoup",
"version": "2.7.0",
"identity": "swiftsoup",
"dependencies": []
},
{
"url": "https://github.com/apple/swift-log.git",
"name": "swift-log",
"path": "/usr/src/package/.build/checkouts/swift-log",
"version": "1.5.4",
"identity": "swift-log",
"dependencies": []
},
{
"url": "https://github.com/MaxDesiatov/XMLCoder.git",
"name": "XMLCoder",
"path": "/usr/src/package/.build/checkouts/XMLCoder",
"version": "0.17.1",
"identity": "xmlcoder",
"dependencies": []
}
]
},
{
"url": "https://github.com/fwcd/swift-graphics.git",
"name": "swift-graphics",
"path": "/usr/src/package/.build/checkouts/swift-graphics",
"version": "3.0.1",
"identity": "swift-graphics",
"dependencies": [
{
"url": "https://github.com/apple/swift-log.git",
"name": "swift-log",
"path": "/usr/src/package/.build/checkouts/swift-log",
"version": "1.5.4",
"identity": "swift-log",
"dependencies": []
},
{
"url": "https://github.com/fwcd/swift-utils.git",
"name": "swift-utils",
"path": "/usr/src/package/.build/checkouts/swift-utils",
"version": "3.0.0",
"identity": "swift-utils",
"dependencies": [
{
"url": "https://github.com/scinfu/SwiftSoup.git",
"name": "SwiftSoup",
"path": "/usr/src/package/.build/checkouts/SwiftSoup",
"version": "2.7.0",
"identity": "swiftsoup",
"dependencies": []
},
{
"url": "https://github.com/apple/swift-log.git",
"name": "swift-log",
"path": "/usr/src/package/.build/checkouts/swift-log",
"version": "1.5.4",
"identity": "swift-log",
"dependencies": []
},
{
"url": "https://github.com/MaxDesiatov/XMLCoder.git",
"name": "XMLCoder",
"path": "/usr/src/package/.build/checkouts/XMLCoder",
"version": "0.17.1",
"identity": "xmlcoder",
"dependencies": []
}
]
},
{
"url": "https://github.com/fwcd/swift-cairo.git",
"name": "swift-cairo",
"path": "/usr/src/package/.build/checkouts/swift-cairo",
"version": "1.3.4",
"identity": "swift-cairo",
"dependencies": []
}
]
},
{
"url": "https://github.com/apple/swift-argument-parser.git",
"name": "swift-argument-parser",
"path": "/usr/src/package/.build/checkouts/swift-argument-parser",
"version": "0.3.2",
"identity": "swift-argument-parser",
"dependencies": []
}
]
}