Commit

ajhahnde

Initial profile README

ajhahnde · May 2026 · ff39e8ea5fac0166bc9dcddb92175d866006e597 · view on GitHub →

added README.md

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 + <div align="center"> 
 +  
 + <picture> 
 +     <source media="(prefers-color-scheme: dark)" srcset="assets/ajhahnde_logo_dark.png"> 
 +     <img src="assets/ajhahnde_logo_light.png" alt="ajhahnde" width="380"> 
 + </picture> 
 +  
 + ### Student · Berlin · low-level, systems & tooling 
 +  
 + <p> 
 +     <img src="https://img.shields.io/badge/Zig-F7A41D?style=flat&logo=zig&logoColor=white" alt="Zig"> 
 +     <img src="https://img.shields.io/badge/Go-00ADD8?style=flat&logo=go&logoColor=white" alt="Go"> 
 +     <img src="https://img.shields.io/badge/Python-3776AB?style=flat&logo=python&logoColor=white" alt="Python"> 
 +     <img src="https://img.shields.io/badge/C-A8B9CC?style=flat&logo=c&logoColor=black" alt="C"> 
 +     <img src="https://img.shields.io/badge/C%2B%2B-00599C?style=flat&logo=c%2B%2B&logoColor=white" alt="C++"> 
 +     <img src="https://img.shields.io/badge/Swift-F05138?style=flat&logo=swift&logoColor=white" alt="Swift"> 
 +     <img src="https://img.shields.io/badge/Java-ED8B00?style=flat&logo=openjdk&logoColor=white" alt="Java"> 
 +     <img src="https://img.shields.io/badge/Shell-4EAA25?style=flat&logo=gnu-bash&logoColor=white" alt="Shell"> 
 +     <img src="https://img.shields.io/badge/JavaScript-F7DF1E?style=flat&logo=javascript&logoColor=black" alt="JavaScript"> 
 +     <img src="https://img.shields.io/badge/TypeScript-3178C6?style=flat&logo=typescript&logoColor=white" alt="TypeScript"> 
 +     <img src="https://img.shields.io/badge/Lua-2C2D72?style=flat&logo=lua&logoColor=white" alt="Lua"> 
 +     <img src="https://img.shields.io/badge/PostgreSQL-4169E1?style=flat&logo=postgresql&logoColor=white" alt="PostgreSQL"> 
 +     <img src="https://img.shields.io/badge/AArch64%20Assembly-0091BD?style=flat&logo=arm&logoColor=white" alt="AArch64 Assembly"> 
 + </p> 
 +  
 + --- 
 +  
 + **Currently:** Refining systems architecture & exploring AArch64 bare-metal. 
 +  
 + </div> 
 +  
 + ## Portfolio projects 
 +  
 + * **[FlashOS](https://github.com/ajhahnde/FlashOS)** — AArch64 bare-metal kernel for the Raspberry Pi 4 Model B. 
 + * **[eeco](https://github.com/ajhahnde/eeco)** — A self-maintaining workflow ecosystem. 
 + * **[the-way-out](https://github.com/ajhahnde/the-way-out)** — Top-down pixel-art escape-room shooter. 
 +  
 + --- 
 +  
 + <div align="center"> 
 +   <sub>Built with precision in Berlin.</sub> 
 + </div> 

added assets/ajhahnde_logo_dark.png

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added assets/ajhahnde_logo_light.png

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added scripts/render_logo.swift

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 + #!/usr/bin/env swift 
 + // Render the "ajhahnde" wordmark to a transparent PNG using the Orbitron font. 
 + // 
 + // Variants: 
 + //   1: Regular  "ajhahnde"  (whole word, color1) 
 + //   2: Bold     "ajhahnde"  (whole word, color1) 
 + //   3: SemiBold "ajhahnde"  (whole word, color1) 
 + //   4: split — "ajhahn" Regular color1 + "de" Bold color2  (the mark) 
 + // 
 + // Requires Orbitron-Regular.ttf, Orbitron-Bold.ttf, Orbitron-SemiBold.ttf 
 + // in /Library/Fonts or ~/Library/Fonts. 
 + // 
 + // Reproduce the committed assets: 
 + //   swift scripts/render_logo.swift 4 assets/ajhahnde_logo_light.png \ 
 + //        --color1 1B1F24 --color2 0B8FB8 
 + //   swift scripts/render_logo.swift 4 assets/ajhahnde_logo_dark.png \ 
 + //        --color1 E8E8E8 --color2 5BC8F2 
 + // 
 + // For variant 4: --color1 styles "ajhahn", --color2 styles "de". 
 + // For variants 1-3: --color1 styles the whole word; --color2 ignored. 
 + // Default colors: black (000000). 
 +  
 + import AppKit 
 + import Foundation 
 +  
 + func parseHexColor(_ hex: String) -> NSColor? { 
 +     var h = hex 
 +     if h.hasPrefix("#") { h.removeFirst() } 
 +     guard h.count == 6, let v = UInt32(h, radix: 16) else { return nil } 
 +     let r = CGFloat((v >> 16) & 0xff) / 255.0 
 +     let g = CGFloat((v >>  8) & 0xff) / 255.0 
 +     let b = CGFloat( v        & 0xff) / 255.0 
 +     return NSColor(srgbRed: r, green: g, blue: b, alpha: 1.0) 
 + } 
 +  
 + let args = CommandLine.arguments 
 + guard args.count >= 3, let variant = Int(args[1]) else { 
 +     FileHandle.standardError.write( 
 +         ("Usage: \(args[0]) <variant 1-4> <output.png> " + 
 +          "[--font-size N] [--color1 RRGGBB] [--color2 RRGGBB]\n") 
 +             .data(using: .utf8)!) 
 +     exit(2) 
 + } 
 + let outputPath = args[2] 
 +  
 + var fontSize: CGFloat = 500 
 + var color1: NSColor = .black 
 + var color2: NSColor = .black 
 +  
 + var i = 3 
 + while i < args.count { 
 +     switch args[i] { 
 +     case "--font-size": 
 +         if i + 1 < args.count, let s = Double(args[i + 1]) { 
 +             fontSize = CGFloat(s) 
 +             i += 2 
 +         } else { exit(2) } 
 +     case "--color1": 
 +         if i + 1 < args.count, let c = parseHexColor(args[i + 1]) { 
 +             color1 = c 
 +             i += 2 
 +         } else { exit(2) } 
 +     case "--color2": 
 +         if i + 1 < args.count, let c = parseHexColor(args[i + 1]) { 
 +             color2 = c 
 +             i += 2 
 +         } else { exit(2) } 
 +     default: 
 +         FileHandle.standardError.write("unknown arg: \(args[i])\n".data(using: .utf8)!) 
 +         exit(2) 
 +     } 
 + } 
 +  
 + func font(_ name: String, size: CGFloat) -> NSFont { 
 +     guard let f = NSFont(name: name, size: size) else { 
 +         FileHandle.standardError.write("Font \(name) not found\n".data(using: .utf8)!) 
 +         exit(3) 
 +     } 
 +     return f 
 + } 
 +  
 + let regular  = font("Orbitron-Regular",  size: fontSize) 
 + let bold     = font("Orbitron-Bold",     size: fontSize) 
 + let semibold = font("Orbitron-SemiBold", size: fontSize) 
 +  
 + let attrString: NSAttributedString 
 + switch variant { 
 + case 1: 
 +     attrString = NSAttributedString( 
 +         string: "ajhahnde", 
 +         attributes: [.font: regular, .foregroundColor: color1]) 
 + case 2: 
 +     attrString = NSAttributedString( 
 +         string: "ajhahnde", 
 +         attributes: [.font: bold, .foregroundColor: color1]) 
 + case 3: 
 +     attrString = NSAttributedString( 
 +         string: "ajhahnde", 
 +         attributes: [.font: semibold, .foregroundColor: color1]) 
 + case 4: 
 +     let s = NSMutableAttributedString() 
 +     s.append(NSAttributedString( 
 +         string: "ajhahn", 
 +         attributes: [.font: regular, .foregroundColor: color1])) 
 +     s.append(NSAttributedString( 
 +         string: "de", 
 +         attributes: [.font: bold, .foregroundColor: color2])) 
 +     attrString = s 
 + default: 
 +     FileHandle.standardError.write("Variant must be 1-4\n".data(using: .utf8)!) 
 +     exit(2) 
 + } 
 +  
 + let padding: CGFloat = fontSize * 0.15 
 + let textSize = attrString.size() 
 + let imageW = ceil(textSize.width + 2 * padding) 
 + let imageH = ceil(textSize.height + 2 * padding) 
 +  
 + let image = NSImage(size: NSSize(width: imageW, height: imageH)) 
 + image.lockFocus() 
 + NSColor.clear.setFill() 
 + NSRect(x: 0, y: 0, width: imageW, height: imageH).fill() 
 + let drawY = (imageH - textSize.height) / 2 
 + attrString.draw(at: NSPoint(x: padding, y: drawY)) 
 + image.unlockFocus() 
 +  
 + guard let tiff = image.tiffRepresentation, 
 +       let bitmap = NSBitmapImageRep(data: tiff), 
 +       let png = bitmap.representation(using: .png, properties: [:]) 
 + else { 
 +     FileHandle.standardError.write("Failed to encode PNG\n".data(using: .utf8)!) 
 +     exit(4) 
 + } 
 +  
 + do { 
 +     try png.write(to: URL(fileURLWithPath: outputPath)) 
 +     print("wrote \(outputPath) (\(Int(imageW))×\(Int(imageH)) px, variant \(variant))") 
 + } catch { 
 +     FileHandle.standardError.write("write failed: \(error)\n".data(using: .utf8)!) 
 +     exit(5) 
 + } 