listless

A simple list app for Apple platforms
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screenshots-iphone-island.swift (2254B)

      1 #!/usr/bin/env swift
      2 
      3 import CoreGraphics
      4 import Foundation
      5 import ImageIO
      6 
      7 guard CommandLine.arguments.count >= 2 else {
      8     fputs("Usage: add-dynamic-island.swift <image.png> [output.png]\n", stderr)
      9     exit(1)
     10 }
     11 
     12 let inputPath = CommandLine.arguments[1]
     13 let outputPath = CommandLine.arguments.count >= 3 ? CommandLine.arguments[2] : inputPath
     14 
     15 guard let dataProvider = CGDataProvider(filename: inputPath),
     16     let image = CGImage(
     17         pngDataProviderSource: dataProvider, decode: nil, shouldInterpolate: true,
     18         intent: .defaultIntent)
     19 else {
     20     fputs("Failed to load image: \(inputPath)\n", stderr)
     21     exit(1)
     22 }
     23 
     24 let width = CGFloat(image.width)
     25 let height = CGFloat(image.height)
     26 
     27 // Dynamic Island dimensions as proportions of screen width
     28 let pillWidth = width * 0.280
     29 let pillHeight = width * 0.062
     30 let pillY = width * 0.050
     31 let pillX = (width - pillWidth) / 2
     32 let cornerRadius = pillHeight / 2
     33 
     34 guard
     35     let context = CGContext(
     36         data: nil,
     37         width: Int(width),
     38         height: Int(height),
     39         bitsPerComponent: 8,
     40         bytesPerRow: 0,
     41         space: CGColorSpaceCreateDeviceRGB(),
     42         bitmapInfo: CGImageAlphaInfo.premultipliedLast.rawValue
     43     )
     44 else {
     45     fputs("Failed to create graphics context\n", stderr)
     46     exit(1)
     47 }
     48 
     49 // Draw original image
     50 context.draw(image, in: CGRect(x: 0, y: 0, width: width, height: height))
     51 
     52 // Draw Dynamic Island pill (CG origin is bottom-left, so flip Y)
     53 let flippedY = height - pillY - pillHeight
     54 let pillRect = CGRect(x: pillX, y: flippedY, width: pillWidth, height: pillHeight)
     55 let pillPath = CGPath(
     56     roundedRect: pillRect, cornerWidth: cornerRadius, cornerHeight: cornerRadius, transform: nil)
     57 
     58 context.setFillColor(CGColor(red: 0, green: 0, blue: 0, alpha: 1))
     59 context.addPath(pillPath)
     60 context.fillPath()
     61 
     62 guard let resultImage = context.makeImage(),
     63     let destination = CGImageDestinationCreateWithURL(
     64         URL(fileURLWithPath: outputPath) as CFURL,
     65         "public.png" as CFString,
     66         1,
     67         nil
     68     )
     69 else {
     70     fputs("Failed to create output\n", stderr)
     71     exit(1)
     72 }
     73 
     74 CGImageDestinationAddImage(destination, resultImage, nil)
     75 guard CGImageDestinationFinalize(destination) else {
     76     fputs("Failed to write output\n", stderr)
     77     exit(1)
     78 }