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
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