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80 lines
1.6 KiB
Swift
80 lines
1.6 KiB
Swift
//
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// RSImage-Extensions.swift
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// RSCore
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//
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// Created by Maurice Parker on 4/11/19.
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// Copyright © 2019 Ranchero Software. All rights reserved.
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//
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#if os(macOS)
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import AppKit
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#else
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import UIKit
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#endif
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import Core
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extension RSImage {
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private static let scaledMaxPixelSize: Int = {
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let maxIconSize = 48
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#if os(iOS)
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let maxScreenScale = 3
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#elseif os(macOS)
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let maxScreenScale = 2
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#endif
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return maxIconSize * maxScreenScale
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}()
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static func scaledForIcon(_ data: Data) async -> RSImage? {
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await IconScalerQueue.shared.scaledForIcon(data)
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}
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static func scaledForIcon(_ data: Data) -> RSImage? {
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guard var cgImage = RSImage.scaleImage(data, maxPixelSize: Self.scaledMaxPixelSize) else {
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return nil
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}
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#if os(iOS)
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return RSImage(cgImage: cgImage)
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#else
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let size = NSSize(width: cgImage.width, height: cgImage.height)
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return RSImage(cgImage: cgImage, size: size)
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#endif
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}
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}
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// MARK: - IconScalerQueue
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private final class IconScalerQueue: @unchecked Sendable {
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static let shared = IconScalerQueue()
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private let queue: DispatchQueue = {
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let q = DispatchQueue(label: "IconScaler", attributes: .initiallyInactive)
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q.setTarget(queue: DispatchQueue.global(qos: .default))
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q.activate()
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return q
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}()
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private func scaledForIcon(_ data: Data, _ imageResultBlock: @escaping ImageResultBlock) {
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queue.async {
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let image = RSImage.scaledForIcon(data)
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imageResultBlock(image)
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}
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}
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func scaledForIcon(_ data: Data) async -> RSImage? {
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await withCheckedContinuation { continuation in
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self.scaledForIcon(data) { image in
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continuation.resume(returning: image)
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}
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}
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}
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}
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