Add a black and white Monero app icon

apps/ios/Branding/README.md

@@ -0,0 +1,23 @@
+# Branding
+
+`logo.svg` is the source artwork: the Monero monogram in black and white —
+two outer legs, a central V descending onto a full-width base bar, one uniform
+stroke width (118 of 1024) so it stays legible at 60 px.
+
+iOS cannot use SVG for app icons, so the PNGs in
+`Koins/Assets.xcassets/AppIcon.appiconset` are rendered from the same geometry:
+
+```sh
+cd apps/ios
+swift Branding/make-icons.swift Koins/Assets.xcassets/AppIcon.appiconset
+```
+
+That writes the 1024×1024 icon (black ground, white mark, no alpha channel —
+the App Store rejects icons with alpha) plus `Branding/logo-light.png`, the
+inverted variant.
+
+The asset catalog uses the single-size format, so Xcode derives every size the
+device needs from the 1024.
+
+Note: the Monero name and mark are the Monero Project's; check their brand
+guidance before shipping this publicly.

apps/ios/Branding/logo.svg

@@ -0,0 +1,17 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1024 1024" width="1024" height="1024" role="img" aria-label="Monero">
+  <title>Koins — Monero mark (monochrome)</title>
+  <!--
+    Monero monogram: two outer legs, a central V descending onto a full-width
+    base bar. Every part is one uniform stroke width so the mark stays legible
+    when iOS scales it to 60 px.
+
+    Regenerate the PNGs in Koins/Assets.xcassets/AppIcon.appiconset from this
+    geometry (see Branding/README.md).
+  -->
+  <rect width="1024" height="1024" fill="#000000"/>
+  <g fill="none" stroke="#ffffff" stroke-width="118" stroke-linecap="butt" stroke-linejoin="miter">
+    <path d="M 279 758 L 279 280 L 512 640"/>
+    <path d="M 745 758 L 745 280 L 512 640"/>
+    <path d="M 220 699 L 804 699"/>
+  </g>
+</svg>

apps/ios/Branding/make-icons.swift

@@ -0,0 +1,81 @@
+// Regenerates the app icon PNGs from the same geometry as Branding/logo.svg.
+//
+//   cd apps/ios
+//   swift Branding/make-icons.swift Koins/Assets.xcassets/AppIcon.appiconset
+//
+// iOS cannot use SVG for app icons, so the SVG is the source artwork and this
+// script produces the raster the asset catalog needs. It also writes
+// Branding/logo-light.png (white ground, black mark).
+import AppKit
+import CoreGraphics
+import Foundation
+
+// Draws the same geometry as Branding/logo.svg with CoreGraphics, because iOS
+// app icons must be raster images.
+func drawIcon(size: CGFloat, inverted: Bool = false) -> CGImage? {
+  let scale = size / 1024.0
+  let colorSpace = CGColorSpaceCreateDeviceRGB()
+  guard let context = CGContext(data: nil,
+                               width: Int(size),
+                               height: Int(size),
+                               bitsPerComponent: 8,
+                               bytesPerRow: 0,
+                               space: colorSpace,
+                               bitmapInfo: CGImageAlphaInfo.noneSkipLast.rawValue) else { return nil }
+
+  let background = inverted ? NSColor.white : NSColor.black
+  let foreground = inverted ? NSColor.black : NSColor.white
+  context.setFillColor(background.cgColor)
+  context.fill(CGRect(x: 0, y: 0, width: size, height: size))
+
+  context.setStrokeColor(foreground.cgColor)
+  context.setLineWidth(118 * scale)
+  context.setLineCap(.butt)
+  context.setLineJoin(.miter)
+
+  func point(_ x: CGFloat, _ y: CGFloat) -> CGPoint {
+    // SVG y grows downwards, CoreGraphics grows upwards.
+    CGPoint(x: x * scale, y: size - y * scale)
+  }
+
+  // Left leg continuing into the central V (one path, so the top corner is a
+  // clean miter rather than two overlapping strokes).
+  context.beginPath()
+  context.move(to: point(279, 758))
+  context.addLine(to: point(279, 280))
+  context.addLine(to: point(512, 640))
+  context.strokePath()
+
+  // Right leg, mirrored.
+  context.beginPath()
+  context.move(to: point(745, 758))
+  context.addLine(to: point(745, 280))
+  context.addLine(to: point(512, 640))
+  context.strokePath()
+
+  // Full-width bar across the base.
+  context.beginPath()
+  context.move(to: point(220, 699))
+  context.addLine(to: point(804, 699))
+  context.strokePath()
+
+  return context.makeImage()
+}
+
+func write(_ image: CGImage, to path: String) {
+  let rep = NSBitmapImageRep(cgImage: image)
+  guard let data = rep.representation(using: .png, properties: [:]) else { return }
+  try? data.write(to: URL(fileURLWithPath: path))
+  print("wrote \(path)")
+}
+
+let outputDir = CommandLine.arguments.count > 1 ? CommandLine.arguments[1] : "/tmp"
+try? FileManager.default.createDirectory(atPath: outputDir, withIntermediateDirectories: true)
+
+if let icon = drawIcon(size: 1024) {
+  write(icon, to: "\(outputDir)/AppIcon-1024.png")
+}
+// A light variant, handy for other surfaces (white background, black mark).
+if let light = drawIcon(size: 1024, inverted: true) {
+  write(light, to: "\(outputDir)/AppIcon-light-1024.png")
+}

apps/ios/Koins/Assets.xcassets/AppIcon.appiconset/Contents.json

@@ -0,0 +1,14 @@
+{
+  "images" : [
+    {
+      "filename" : "AppIcon-1024.png",
+      "idiom" : "universal",
+      "platform" : "ios",
+      "size" : "1024x1024"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

apps/ios/Koins/Assets.xcassets/Contents.json

@@ -0,0 +1,6 @@
+{
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

apps/ios/project.yml

@@ -29,6 +29,7 @@ targets:
         CODE_SIGN_STYLE: Automatic
         DEVELOPMENT_TEAM: RX6767S6BW
         CODE_SIGNING_ALLOWED[sdk=iphonesimulator*]: NO
+        ASSETCATALOG_COMPILER_APPICON_NAME: AppIcon
         SWIFT_OBJC_BRIDGING_HEADER: Koins/Bridge/Koins-Bridging-Header.h
         OTHER_LDFLAGS[sdk=iphoneos*]:
           - "$(inherited)"