Created
May 27, 2024 22:18
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Command Line tool to add Rounded Corners to images
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| // | |
| // This is a small command line tool for macOS that takes all images in a directory | |
| // and creates versions of these images with rounded corners. Ideal for App Icons. | |
| // | |
| // Compile with: | |
| // $ swiftc roundedCorners.swift | |
| // | |
| // Usage: | |
| // ./roundedCorners imageDirectory | |
| // | |
| import Foundation | |
| import Cocoa | |
| let arguments = CommandLine.arguments | |
| guard arguments.count >= 2 else { | |
| fatalError("Usage: \(arguments[0]) <path of directory with images>") | |
| } | |
| let currentPathURL = URL(string: FileManager.default.currentDirectoryPath) | |
| guard let inputURL = URL(string: arguments[1]) else { | |
| fatalError("Invalid input URL") | |
| } | |
| print("Input URL: \(inputURL)") | |
| guard let contents = try? FileManager.default.contentsOfDirectory(at: inputURL, includingPropertiesForKeys: nil) else { | |
| fatalError("Unable to access input directory") | |
| } | |
| guard !contents.isEmpty else { | |
| fatalError("Empty directory") | |
| } | |
| for imageURL in contents { | |
| print("Opening: \(imageURL)") | |
| if let image = NSImage(contentsOf: imageURL) { | |
| if let data = makeRoundedImage(image: image) { | |
| let fileName = imageURL.deletingPathExtension().lastPathComponent | |
| let newURL = imageURL.deletingLastPathComponent().appending(path: "\(fileName)_rounded.png") | |
| print("Saving to: \(newURL)") | |
| do { | |
| try data.write(to: newURL) | |
| } catch { | |
| print("Failed to save image! \(error)") | |
| } | |
| } else { | |
| print("Failed to generate image!") | |
| } | |
| } else { | |
| print("Not an image, skipping...") | |
| } | |
| } | |
| func makeRoundedImage(image: NSImage, radiusRatio: CGFloat = (360.0/2048.0)) -> Data? { | |
| guard let size = image.pixelSize else { | |
| return nil | |
| } | |
| guard let rep = NSBitmapImageRep( | |
| bitmapDataPlanes: nil, | |
| pixelsWide: Int(size.width), | |
| pixelsHigh: Int(size.height), | |
| bitsPerSample: 8, | |
| samplesPerPixel: 4, | |
| hasAlpha: true, | |
| isPlanar: false, | |
| colorSpaceName: .calibratedRGB, | |
| bytesPerRow: 0, | |
| bitsPerPixel: 0 | |
| ) else { | |
| return nil | |
| } | |
| rep.size = size | |
| guard let context = NSGraphicsContext(bitmapImageRep: rep) else { | |
| return nil | |
| } | |
| let rect = CGRect(origin: CGPoint.zero, size: size) | |
| let imageLayer = CALayer() | |
| imageLayer.frame = rect | |
| imageLayer.contents = image.cgImage(forProposedRect: nil, context: nil, hints: nil) | |
| imageLayer.masksToBounds = true | |
| imageLayer.cornerRadius = (radiusRatio * size.width) | |
| imageLayer.render(in: context.cgContext) | |
| return rep.representation(using: .png, properties: [:]) | |
| } | |
| extension NSImage{ | |
| var pixelSize: NSSize? { | |
| guard let rep = self.representations.first else { return nil } | |
| return NSSize(width: rep.pixelsWide, height: rep.pixelsHigh) | |
| } | |
| } |
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