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https://github.com/divkit/divkit.git
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akhmetsafin
44 lines
1.3 KiB
Swift
44 lines
1.3 KiB
Swift
// Copyright 2021 Yandex LLC. All rights reserved.
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import CoreGraphics
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// TODO: fix publicity of the internal struct
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// and bring BaseUI import back in https://st.yandex-team.ru/IBRO-28090
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public struct InternalImageDescriptor {
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public let drawingHandler: (CGContext) -> Void
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public let size: CGSize
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public init(drawingHandler: @escaping (CGContext) -> Void, size: CGSize) {
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self.drawingHandler = drawingHandler
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self.size = size
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}
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public func imageWithShadow(offset: CGSize, blur: CGFloat, color: Color) -> Image {
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let spaceExpansionX = abs(offset.width) + blur
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let spaceExpansionY = abs(offset.height) + blur
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let requiredSize = CGSize(
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width: size.width + 2 * spaceExpansionX,
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height: size.height + 2 * spaceExpansionY
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)
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let internalDrawingHandler: (CGContext) -> Void = { ctx in
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ctx.translateBy(x: spaceExpansionX, y: spaceExpansionY)
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ctx.setShadow(offset: offset, blur: blur, color: color.cgColor)
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ctx.beginTransparencyLayer(auxiliaryInfo: nil)
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drawingHandler(ctx)
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ctx.endTransparencyLayer()
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}
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#if os(iOS)
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return Image.imageOfSize(
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requiredSize,
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transformForUIKitCompatibility: false,
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drawingHandler: internalDrawingHandler
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)!
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#else
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return Image.imageOfSize(
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requiredSize,
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drawingHandler: internalDrawingHandler
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)!
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#endif
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}
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}
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