115 lines
3.8 KiB
Swift
115 lines
3.8 KiB
Swift
// Copyright 2020-2021 Tokamak contributors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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// Created by Carson Katri on 9/17/21.
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//
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import Foundation
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public struct Canvas<Symbols> where Symbols: View {
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public var symbols: Symbols
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public var renderer: (inout GraphicsContext, CGSize) -> ()
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public var isOpaque: Bool
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public var colorMode: ColorRenderingMode
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public var rendersAsynchronously: Bool
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@Environment(\.self)
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public var _environment: EnvironmentValues
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public func _makeContext(
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onOperation: @escaping (GraphicsContext._Storage, GraphicsContext._Storage._Operation) -> (),
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imageResolver: @escaping (Image, EnvironmentValues) -> GraphicsContext.ResolvedImage,
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textResolver: @escaping (Text, EnvironmentValues) -> GraphicsContext.ResolvedText,
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symbolResolver: @escaping (AnyHashable, AnyView, EnvironmentValues) -> GraphicsContext
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.ResolvedSymbol
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) -> GraphicsContext {
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.init(_storage: .init(
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in: _environment,
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with: onOperation,
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imageResolver: imageResolver,
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textResolver: textResolver,
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symbols: AnyView(symbols),
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symbolResolver: symbolResolver
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))
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}
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public init(
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opaque: Bool = false,
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colorMode: ColorRenderingMode = .nonLinear,
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rendersAsynchronously: Bool = false,
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renderer: @escaping (inout GraphicsContext, CGSize) -> (),
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@ViewBuilder symbols: () -> Symbols
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) {
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isOpaque = opaque
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self.colorMode = colorMode
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self.rendersAsynchronously = rendersAsynchronously
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self.renderer = renderer
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self.symbols = symbols()
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}
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}
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extension Canvas: _PrimitiveView {}
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public extension Canvas where Symbols == EmptyView {
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init(
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opaque: Bool = false,
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colorMode: ColorRenderingMode = .nonLinear,
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rendersAsynchronously: Bool = false,
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renderer: @escaping (inout GraphicsContext, CGSize) -> ()
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) {
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isOpaque = opaque
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self.colorMode = colorMode
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self.rendersAsynchronously = rendersAsynchronously
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self.renderer = renderer
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symbols = EmptyView()
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}
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}
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public enum ColorRenderingMode: Hashable {
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case nonLinear
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case linear
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case extendedLinear
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}
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public struct ColorMatrix: Equatable {
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public var r1: Float = 1, r2: Float = 0, r3: Float = 0, r4: Float = 0, r5: Float = 0
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public var g1: Float = 0, g2: Float = 1, g3: Float = 0, g4: Float = 0, g5: Float = 0
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public var b1: Float = 0, b2: Float = 0, b3: Float = 1, b4: Float = 0, b5: Float = 0
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public var a1: Float = 0, a2: Float = 0, a3: Float = 0, a4: Float = 1, a5: Float = 0
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@inlinable
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public init() {}
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}
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public struct _ColorMatrix: Equatable, Codable {
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public var m11: Float = 1, m12: Float = 0, m13: Float = 0, m14: Float = 0, m15: Float = 0
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public var m21: Float = 0, m22: Float = 1, m23: Float = 0, m24: Float = 0, m25: Float = 0
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public var m31: Float = 0, m32: Float = 0, m33: Float = 1, m34: Float = 0, m35: Float = 0
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public var m41: Float = 0, m42: Float = 0, m43: Float = 0, m44: Float = 1, m45: Float = 0
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@inlinable
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public init() {}
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public init(color: Color, in environment: EnvironmentValues) {
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m11 = 0
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m15 = Float(color.provider.resolve(in: environment).red / 255)
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m22 = 0
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m25 = Float(color.provider.resolve(in: environment).green / 255)
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m33 = 0
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m35 = Float(color.provider.resolve(in: environment).blue / 255)
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m44 = 0
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m45 = Float(color.provider.resolve(in: environment).opacity / 255)
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}
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}
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