51 lines
1.8 KiB
Swift
51 lines
1.8 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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import QuartzCore
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public struct CALayerDrawingOperation: DrawingOperation {
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public var layer: CALayer
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public var offset: CGPoint
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public init(layer: CALayer,
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offset: CGPoint) {
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self.layer = layer
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self.offset = offset
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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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CGRect(origin: offset, size: layer.bounds.size)
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}
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public func apply(in context: CGContext) {
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let offsetTransform = CGAffineTransform(translationX: offset.x, y: offset.y)
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context.concatenate(offsetTransform)
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layer.render(in: context)
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offsetTransform.concatenating(offsetTransform.inverted())
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}
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}
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