//
//  Copyright (c) 2017 Touch Instinct
//
//  Permission is hereby granted, free of charge, to any person obtaining a copy
//  of this software and associated documentation files (the Software), to deal
//  in the Software without restriction, including without limitation the rights
//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
//  copies of the Software, and to permit persons to whom the Software is
//  furnished to do so, subject to the following conditions:
//
//  The above copyright notice and this permission notice shall be included in
//  all copies or substantial portions of the Software.
//
//  THE SOFTWARE IS PROVIDED AS IS, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
//  THE SOFTWARE.
//

import CoreGraphics

struct ResizeDrawingOperation: DrawingOperation {

    private let image: CGImage
    private let drawRect: CGRect
    public let contextSize: CGContextSize

    public init(image: CGImage,
                imageSize: CGSize,
                preferredNewSize: CGSize,
                resizeMode: ResizeMode,
                cropToImageBounds: Bool = false) {

        self.image = image

        let resizedRect = imageSize.resizeRect(forNewSize: preferredNewSize, resizeMode: resizeMode)

        if cropToImageBounds {
            drawRect = CGRect(origin: .zero, size: resizedRect.size)
            contextSize = resizedRect.size.ceiledContextSize
        } else {
            drawRect = resizedRect
            contextSize = preferredNewSize.ceiledContextSize
        }
    }

    public func apply(in context: CGContext) {
        context.interpolationQuality = .high
        context.draw(image, in: drawRect)
    }
}