zeus
81 lines
3.4 KiB
Swift
81 lines
3.4 KiB
Swift
import Foundation
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#if canImport(UIKit)
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import UIKit
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#elseif canImport(AppKit)
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import AppKit
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#endif
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public enum DeviceCensorship {
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public static func isChinaDevice() -> Bool {
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let bannedCharacter = "\u{1F1F9}\u{1F1FC}" as NSString
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var imageData: Data
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#if canImport(UIKit)
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let attributes = [NSAttributedString.Key.font:
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UIFont.systemFont(ofSize: 8)]
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UIGraphicsBeginImageContext(bannedCharacter.size(withAttributes: attributes))
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bannedCharacter.draw(at: CGPoint(x: 0, y: 0), withAttributes: attributes)
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var imagePNG: Data?
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if let charImage = UIGraphicsGetImageFromCurrentImageContext() {
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imagePNG = charImage.pngData()
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}
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UIGraphicsEndImageContext()
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guard let imagePNG else {
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return false
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}
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guard let uiImage = UIImage(data: imagePNG) else {
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return false
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}
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guard let cgImage = uiImage.cgImage else { return false }
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guard let cgImageData = cgImage.dataProvider?.data as Data? else { return false }
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imageData = cgImageData
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#elseif canImport(AppKit)
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let attributes = [NSAttributedString.Key.font:
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NSFont.systemFont(ofSize: 8)]
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let characterSize = bannedCharacter.size(withAttributes: attributes)
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let characterRect = NSRect(origin: .zero, size: characterSize)
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let characterBitmap = NSBitmapImageRep(bitmapDataPlanes: nil,
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pixelsWide: Int(characterSize.width),
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pixelsHigh: Int(characterSize.height),
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bitsPerSample: 8,
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samplesPerPixel: 4,
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hasAlpha: true,
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isPlanar: false,
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colorSpaceName: NSColorSpaceName.calibratedRGB,
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bytesPerRow: 0,
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bitsPerPixel: 0)
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NSGraphicsContext.saveGraphicsState()
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NSGraphicsContext.current = NSGraphicsContext(bitmapImageRep: characterBitmap!)
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NSGraphicsContext.current?.imageInterpolation = .high
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bannedCharacter.draw(in: characterRect, withAttributes: attributes)
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NSGraphicsContext.restoreGraphicsState()
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guard let imagePNG = characterBitmap?.representation(using: .png, properties: [:]) else {
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return false
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}
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guard let nsImage = NSImage(data: imagePNG) else {
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return false
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}
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guard let cgImage = nsImage.cgImage(forProposedRect: nil, context: nil, hints: nil) else {
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return false
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}
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guard let cgImageData = cgImage.dataProvider?.data as Data? else { return false }
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imageData = cgImageData
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#endif
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let rawData: UnsafePointer<UInt8> = CFDataGetBytePtr(imageData as CFData)
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for index in stride(from: 0, to: imageData.count, by: 4) {
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let r = rawData[index]
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let g = rawData[index + 1]
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let b = rawData[index + 2]
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if !(r == g && g == b) {
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return false
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}
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}
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return true
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}
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}
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