Haik Aslanyan
79 lines
2.7 KiB
Swift
79 lines
2.7 KiB
Swift
// MIT License
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// Copyright (c) 2020 Haik Aslanyan
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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import UIKit
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public final class RCCoder {
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public let configuration: RCCoderConfiguration
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public var scanningMode = ScanningMode.lightBackground {
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didSet {
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imageDecoder.pixelThreshold = scanningMode == .lightBackground ? RCConstants.lightBackgroundRange : RCConstants.darkBackgroundRange
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}
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}
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internal lazy var imageDecoder = RCImageDecoder(configuration: self.configuration)
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internal lazy var imageEncoder = RCImageEncoder(configuration: self.configuration)
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internal lazy var bitCoder = RCBitCoder(configuration: self.configuration)
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public init(configuration: RCCoderConfiguration = .defaultConfiguration) {
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self.configuration = configuration
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}
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}
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public extension RCCoder {
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func encode(_ image: RCImage) throws -> UIImage {
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let bits = try bitCoder.encode(message: image.message)
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let image = imageEncoder.encode(image, bits: bits)
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return image
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}
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func decode(_ image: UIImage) throws -> String {
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guard image.size.width == image.size.height else { throw RCError.wrongImageSize }
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imageDecoder.size = image.cgImage!.height
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imageDecoder.bytesPerRow = image.cgImage!.height
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let bits = try imageDecoder.decode(image)
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let message = try bitCoder.decode(bits)
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return message
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}
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func validate(_ text: String) -> Bool {
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configuration.validate(text)
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}
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}
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public extension RCCoder {
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enum ScanningMode {
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case lightBackground
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case darkBackground
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}
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}
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extension RCCoder {
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func decode(buffer: UnsafeMutablePointer<UInt8>) throws -> String {
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let bits = try imageDecoder.process(pointer: buffer)
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let message = try bitCoder.decode(bits)
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return message
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}
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}
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