Simple read/write PPM files (P3/P6) in Swift (macOS, iOS, tvOS, watchOS, macCatalyst, Linux).
let ppmData = Data(...)
let cgImage = try PPM.readImage(data: ppmData)let image: PPM.Image = try PPM.read(fileURL: ppm1URL)
// width = image.width
// height = image.height
// rawRGBBytes = image.data NOTE: PPM doesn't support transparency, so any transparency information is lost.
let cgImage = CGImage(...)
let data = try PPM.writeImage(cgImage, format: .P3)let image = PPM.Image(...)
try image.write(format: .P3, fileURL: <some_url>)public static func image(rgbData: [PPM.RGB], width: Int, height: Int) throws -> PPM.ImageNote: The number of pixels in the rgbData array must be equal to width * height
let pixels: [PPM.RGB] = [ ... ]
let image = PPM.image(rgbData: pixels, width: 100, height: 100)- Linux only supports very naive color conversions between RGB-CMYK-Gray.
See: Testing Swift packages on Linux using Docker
- Install Docker Desktop for Mac on your mac
- Make sure that docker is running (or else the next command will fail with a weird or no error message)
- Run the following command in the directory you want to mirror in your linux
docker run --rm --privileged --interactive --tty --volume "$(pwd):/src" --workdir "/src" swift:latestNow, from within the docker container, run
swift build
swift testNote that the /src directory in the Linux container is a direct mirror of the current directory on the host OS, not a copy. If you delete a file in /src in the Linux container, that file will be gone on the host OS, too.
MIT License
Copyright (c) 2022 Darren Ford
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
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