tinystt/scripts/make-icon.swift

#!/usr/bin/env swift
//
//  make-icon.swift — 生成 TinyTTS 应用图标
//
//  设计：白色麦克风由三段「文字条」镂空而成 —— 声音落成文字。
//  深靛蓝渐变底 + 纯白图形，16pt 到 1024pt 都保持清晰轮廓。
//
//  用法：swift scripts/make-icon.swift <输出目录>
//

import AppKit
import Foundation

let BASE: CGFloat = 1024

/// 超椭圆（squircle），n 越大越接近方形；n=4 接近 Apple 图标的连续曲率
func squirclePath(in rect: NSRect, n: CGFloat = 4.0, samples: Int = 720) -> NSBezierPath {
    let path = NSBezierPath()
    let a = rect.width / 2
    let b = rect.height / 2
    for i in 0...samples {
        let t = CGFloat(i) / CGFloat(samples) * 2 * .pi
        let ct = cos(t)
        let st = sin(t)
        let x = rect.midX + a * (ct < 0 ? -1 : 1) * pow(abs(ct), 2 / n)
        let y = rect.midY + b * (st < 0 ? -1 : 1) * pow(abs(st), 2 / n)
        if i == 0 { path.move(to: NSPoint(x: x, y: y)) } else { path.line(to: NSPoint(x: x, y: y)) }
    }
    path.close()
    return path
}

func drawIcon(size: CGFloat) -> NSBitmapImageRep {
    let px = Int(size.rounded())
    let rep = NSBitmapImageRep(
        bitmapDataPlanes: nil, pixelsWide: px, pixelsHigh: px,
        bitsPerSample: 8, samplesPerPixel: 4, hasAlpha: true,
        isPlanar: false, colorSpaceName: .deviceRGB,
        bytesPerRow: 0, bitsPerPixel: 0
    )!
    rep.size = NSSize(width: px, height: px)

    NSGraphicsContext.saveGraphicsState()
    guard let ctx = NSGraphicsContext(bitmapImageRep: rep) else { return rep }
    NSGraphicsContext.current = ctx
    ctx.imageInterpolation = .high

    let s = CGFloat(px) / BASE
    // 小尺寸线条会糊，做一点加粗补偿
    let bold: CGFloat = px <= 32 ? 1.16 : (px <= 64 ? 1.06 : 1.0)
    // 尺寸分级：越小越简化，否则 16/32px 会糊成一团
    let isTiny = px <= 32
    let isSmall = px <= 64
    let plateInset: CGFloat = isTiny ? 52 : (isSmall ? 72 : 100)
    let glyphScale: CGFloat = isTiny ? 1.34 : (isSmall ? 1.20 : 1.10)
    let showHoles = px >= 128     // 镂空文字在小图上会糊成一格一格
    let showGlyphShadow = px >= 128
    let showPlateShadow = px >= 128

    func len(_ v: CGFloat) -> CGFloat { v * s }
    /// 1024 基准坐标，y 按「距顶部」度量
    func P(_ x: CGFloat, _ yTop: CGFloat) -> NSPoint { NSPoint(x: x * s, y: (BASE - yTop) * s) }
    /// 矩形（x, 距顶 y, 宽, 高）
    func R(_ x: CGFloat, _ yTop: CGFloat, _ w: CGFloat, _ h: CGFloat) -> NSRect {
        NSRect(x: len(x), y: (BASE - yTop - h) * s, width: len(w), height: len(h))
    }
    func roundRect(_ x: CGFloat, _ yTop: CGFloat, _ w: CGFloat, _ h: CGFloat, _ radius: CGFloat) -> NSBezierPath {
        NSBezierPath(roundedRect: R(x, yTop, w, h), xRadius: len(radius), yRadius: len(radius))
    }

    // MARK: 底板

    let inset = len(plateInset)
    let plate = NSRect(x: inset, y: inset,
                       width: CGFloat(px) - inset * 2,
                       height: CGFloat(px) - inset * 2)
    let shape = squirclePath(in: plate)

    let shadow = NSShadow()
    shadow.shadowColor = NSColor.black.withAlphaComponent(0.30)
    shadow.shadowBlurRadius = len(24)
    shadow.shadowOffset = NSSize(width: 0, height: -len(9))
    if showPlateShadow { shadow.set() }

    let topColor = NSColor(srgbRed: 0.38, green: 0.50, blue: 1.00, alpha: 1)    // #617FFF
    let bottomColor = NSColor(srgbRed: 0.21, green: 0.19, blue: 0.75, alpha: 1) // #3630BF
    NSGradient(starting: topColor, ending: bottomColor)?.draw(in: shape, angle: -90)

    NSShadow().set() // 之后不再带投影

    // 顶部柔光：整块区域线性渐变，避免出现横向硬边
    NSGraphicsContext.saveGraphicsState()
    shape.addClip()
    NSGradient(colors: [
        NSColor.white.withAlphaComponent(0.20),
        NSColor.white.withAlphaComponent(0.0),
    ])?.draw(in: plate, angle: -90)
    NSGraphicsContext.restoreGraphicsState()

    NSColor.white.withAlphaComponent(0.10).setStroke()
    shape.lineWidth = max(len(2), 0.5)
    shape.stroke()

    // MARK: 麦克风

    let glyphShadow = NSShadow()
    glyphShadow.shadowColor = NSColor.black.withAlphaComponent(0.20)
    glyphShadow.shadowBlurRadius = len(14)
    glyphShadow.shadowOffset = NSSize(width: 0, height: -len(7))
    if showGlyphShadow { glyphShadow.set() }

    NSColor.white.setFill()
    NSColor.white.setStroke()

    // 腔体：胶囊上挖出三条文字
    let capX: CGFloat = 412, capW: CGFloat = 200
    let capY: CGFloat = 225, capH: CGFloat = 300
    NSGraphicsContext.current?.cgContext.concatenate(CGAffineTransform(a: glyphScale, b: 0, c: 0, d: glyphScale, tx: len(512) * (1 - glyphScale), ty: len(512) * (1 - glyphScale)))
    let body = roundRect(capX, capY, capW, capH, capW / 2)

    let lineX: CGFloat = 452
    let lineH: CGFloat = 24 * bold
    let lineY: [CGFloat] = [305, 363, 421]
    let linePath = NSBezierPath()
    for (i, y) in lineY.enumerated() {
        let w: CGFloat = [120, 88, 104][i]
        linePath.append(roundRect(lineX, y, w, lineH, lineH / 2))
    }

    let bodyWithHoles = NSBezierPath()
    bodyWithHoles.append(body)
    if showHoles { bodyWithHoles.append(linePath) }
    bodyWithHoles.windingRule = .evenOdd
    bodyWithHoles.fill()

    // 托架
    let arc = NSBezierPath()
    arc.appendArc(withCenter: P(512, 525), radius: len(148),
                  startAngle: 180, endAngle: 360, clockwise: false)
    arc.lineWidth = len(54 * bold)
    arc.lineCapStyle = .round
    arc.stroke()

    // 立柱
    roundRect(512 - 27, 660, 54, 92, 27).fill()

    // 底座
    roundRect(402, 745, 220, 54 * bold, 27 * bold).fill()

    NSShadow().set()
    NSGraphicsContext.restoreGraphicsState()
    return rep
}

// MARK: - 输出

let outDir = CommandLine.arguments.count > 1 ? CommandLine.arguments[1] : "Resources"
let fm = FileManager.default
let iconset = (outDir as NSString).appendingPathComponent("AppIcon.iconset")

try? fm.removeItem(atPath: iconset)
try fm.createDirectory(atPath: iconset, withIntermediateDirectories: true)

let variants: [(String, Int)] = [
    ("icon_16x16", 16), ("icon_16x16@2x", 32),
    ("icon_32x32", 32), ("icon_32x32@2x", 64),
    ("icon_128x128", 128), ("icon_128x128@2x", 256),
    ("icon_256x256", 256), ("icon_256x256@2x", 512),
    ("icon_512x512", 512), ("icon_512x512@2x", 1024),
]

for (name, px) in variants {
    let rep = drawIcon(size: CGFloat(px))
    guard let data = rep.representation(using: .png, properties: [:]) else {
        FileHandle.standardError.write("生成 \(name) 失败\n".data(using: .utf8)!)
        exit(1)
    }
    try data.write(to: URL(fileURLWithPath: iconset).appendingPathComponent("\(name).png"))
}

let icns = (outDir as NSString).appendingPathComponent("AppIcon.icns")
let proc = Process()
proc.executableURL = URL(fileURLWithPath: "/usr/bin/iconutil")
proc.arguments = ["-c", "icns", iconset, "-o", icns]
try proc.run()
proc.waitUntilExit()

// 留一份 1024 PNG，供文档 / 网页 / 预览使用
try? fm.removeItem(atPath: (outDir as NSString).appendingPathComponent("AppIcon-1024.png"))
try? fm.copyItem(
    atPath: (iconset as NSString).appendingPathComponent("icon_512x512@2x.png"),
    toPath: (outDir as NSString).appendingPathComponent("AppIcon-1024.png")
)

guard proc.terminationStatus == 0 else {
    FileHandle.standardError.write("iconutil 失败：\(proc.terminationStatus)\n".data(using: .utf8)!)
    exit(1)
}
print("已生成 \(icns)")