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import CoreGraphics
struct TileImage {
static func image(_ design: TileDesign, pixelSize: CGFloat, foregroundColor: CGColor? = nil, backgroundColor: CGColor? = nil) -> CGImage {
let fg = foregroundColor ?? .init(red: 0, green: 0, blue: 0, alpha: 255)
let bg = backgroundColor ?? .init(red: 255, green: 255, blue: 255, alpha: 255)
// Convert the array to image data
let pixels: [UInt8] = design.pixels().map({ x in
var color = bg
if x == 0 {
color = fg
}
let components = color.components ?? [0,0,0,1]
return components.map({ c in
UInt8(round(c * 255))
})
}).reduce([], +)
// Generate the image
let pointer = UnsafeMutablePointer<UInt8>.allocate(capacity: pixels.count)
pointer.initialize(from: pixels, count: pixels.count)
let width = 8.0
let height = 8.0
let bitsPerComponent = 8
let componentCount = 4
let bitsPerPixel = bitsPerComponent * componentCount
let colorSpace = CGColorSpaceCreateDeviceRGB()
let bitmapInfo = CGBitmapInfo([.byteOrderDefault, CGBitmapInfo(rawValue: CGImageAlphaInfo.premultipliedLast.rawValue)])
let provider = CGDataProvider(dataInfo: nil, data: pointer, size: Int(width * height * 4)) { _, _, _ in
return
}!
let image = CGImage(
width: Int(width),
height: Int(height),
bitsPerComponent: bitsPerComponent,
bitsPerPixel: bitsPerPixel,
bytesPerRow: Int(width) * componentCount,
space: colorSpace,
bitmapInfo: bitmapInfo,
provider: provider,
decode: nil, shouldInterpolate: false, intent: CGColorRenderingIntent.defaultIntent)!
return image.resize(size: CGSize(width: width * pixelSize, height: height * pixelSize)) ?? image
}
}
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