76 lines
2.8 KiB
Swift
76 lines
2.8 KiB
Swift
//
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// Copyright (c) 2022 Touch Instinct
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//
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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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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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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
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// THE SOFTWARE.
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//
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import CoreGraphics
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public struct TransformDrawingOperation: OrientationAwareDrawingOperation {
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public var image: CGImage
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public var imageSize: CGSize
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public var maxNewSize: CGSize
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public var resizeMode: ResizeMode
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public var offset: CGPoint
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public var flipHorizontallyDuringDrawing: Bool
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public var cropToImageBounds: Bool
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public var interpolationQuality: CGInterpolationQuality
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private var resizedRect: CGRect {
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imageSize.resizeRect(forNewSize: maxNewSize, resizeMode: resizeMode)
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}
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public init(image: CGImage,
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imageSize: CGSize,
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maxNewSize: CGSize,
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resizeMode: ResizeMode = .scaleAspectFit,
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offset: CGPoint = .zero,
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flipHorizontallyDuringDrawing: Bool = true,
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cropToImageBounds: Bool = false,
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interpolationQuality: CGInterpolationQuality = .default) {
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self.image = image
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self.imageSize = imageSize
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self.maxNewSize = maxNewSize
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self.resizeMode = resizeMode
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self.offset = offset
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self.flipHorizontallyDuringDrawing = flipHorizontallyDuringDrawing
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self.cropToImageBounds = cropToImageBounds
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self.interpolationQuality = interpolationQuality
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}
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// MARK: - DrawingOperation
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public func affectedArea(in context: CGContext? = nil) -> CGRect {
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if cropToImageBounds {
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return CGRect(origin: offset, size: resizedRect.size)
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} else {
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return resizedRect.offset(by: offset)
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}
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}
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public func apply(in context: CGContext) {
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apply(in: context) {
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$0.interpolationQuality = interpolationQuality
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$0.draw(image, in: affectedAreaForDrawing(in: $0))
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}
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}
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}
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