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Fix hitches due to AttachmentView not using pre-prepared images

This commit is contained in:
Shadowfacts 2023-05-12 21:40:17 -04:00
parent 6f18d46037
commit 2d8e2f0824
2 changed files with 77 additions and 42 deletions
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13
Tusker/ImageGrayscalifier.swift
View File

@ -9,7 +9,7 @@
import UIKit
struct ImageGrayscalifier {
static let queue = DispatchQueue(label: "ImageGrayscalifier", qos: .default)
static let queue = DispatchQueue(label: "ImageGrayscalifier", qos: .userInitiated)
private static let context = CIContext()
private static let cache = NSCache<NSURL, UIImage>()
@ -24,6 +24,17 @@ struct ImageGrayscalifier {
}
}
static func convert(url: URL?, image: UIImage) -> UIImage? {
if let url,
let cached = cache.object(forKey: url as NSURL) {
return cached
}
guard let cgImage = image.cgImage else {
return nil
}
return doConvert(CIImage(cgImage: cgImage), url: url)
}
static func convert(url: URL?, data: Data) -> UIImage? {
if let url = url,
let cached = cache.object(forKey: url as NSURL) {

106
Tusker/Views/Attachments/AttachmentView.swift
View File

@ -75,9 +75,7 @@ class AttachmentView: GIFImageView {
gifPlaybackModeChanged()
if isGrayscale != Preferences.shared.grayscaleImages {
ImageGrayscalifier.queue.async {
self.displayImage()
}
self.displayImage()
}
if getBadges().isEmpty != Preferences.shared.showAttachmentBadges {
@ -189,51 +187,57 @@ class AttachmentView: GIFImageView {
func loadImage() {
let attachmentURL = attachment.url
attachmentRequest = ImageCache.attachments.get(attachmentURL) { [weak self] (data, _) in
guard let self = self, let data = data else { return }
attachmentRequest = ImageCache.attachments.get(attachmentURL) { [weak self] (data, image) in
guard let self = self,
self.attachment.url == attachmentURL else {
return
}
DispatchQueue.main.async {
self.attachmentRequest = nil
}
if self.attachment.url.pathExtension == "gif" {
self.source = .gifData(attachmentURL, data)
let controller = GIFController(gifData: data)
DispatchQueue.main.async {
controller.attach(to: self)
if self.autoplayGifs {
controller.startAnimating()
}
}
if !self.autoplayGifs {
if attachmentURL.pathExtension == "gif",
let data {
self.source = .gifData(attachmentURL, data, image)
if self.autoplayGifs {
let controller = GIFController(gifData: data)
controller.attach(to: self)
controller.startAnimating()
} else {
self.displayImage()
}
} else if let image {
self.source = .image(attachmentURL, image)
self.displayImage()
}
} else {
self.source = .imageData(attachmentURL, data)
self.displayImage()
}
}
}
func loadVideo() {
if let previewURL = self.attachment.previewURL {
attachmentRequest = ImageCache.attachments.get(previewURL, completion: { [weak self] (data, _ )in
guard let self = self, let data = data else { return }
attachmentRequest = ImageCache.attachments.get(previewURL, completion: { [weak self] (_, image) in
guard let self, let image else { return }
DispatchQueue.main.async {
self.attachmentRequest = nil
self.source = .imageData(previewURL, data)
self.source = .image(previewURL, image)
self.displayImage()
}
})
} else {
let attachmentURL = self.attachment.url
AttachmentView.queue.async {
AttachmentView.queue.async { [weak self] in
let asset = AVURLAsset(url: attachmentURL)
let generator = AVAssetImageGenerator(asset: asset)
generator.appliesPreferredTrackTransform = true
guard let image = try? generator.copyCGImage(at: .zero, actualTime: nil) else { return }
self.source = .cgImage(attachmentURL, image)
self.displayImage()
UIImage(cgImage: image).prepareForDisplay { [weak self] image in
DispatchQueue.main.async { [weak self] in
guard let self, let image else { return }
self.source = .image(attachmentURL, image)
self.displayImage()
}
}
}
}
@ -276,8 +280,10 @@ class AttachmentView: GIFImageView {
let generator = AVAssetImageGenerator(asset: asset)
generator.appliesPreferredTrackTransform = true
guard let image = try? generator.copyCGImage(at: .zero, actualTime: nil) else { return }
self.source = .cgImage(attachmentURL, image)
self.displayImage()
DispatchQueue.main.async {
self.source = .cgImage(attachmentURL, image)
self.displayImage()
}
}
let gifvView = GifvAttachmentView(asset: asset, gravity: .resizeAspectFill)
@ -295,33 +301,51 @@ class AttachmentView: GIFImageView {
])
}
@MainActor
private func displayImage() {
isGrayscale = Preferences.shared.grayscaleImages
let image: UIImage?
switch source {
case nil:
image = nil
self.image = nil
case let .imageData(url, data), let .gifData(url, data):
case let .image(url, sourceImage):
if isGrayscale {
image = ImageGrayscalifier.convert(url: url, data: data)
ImageGrayscalifier.queue.async { [weak self] in
let grayscale = ImageGrayscalifier.convert(url: url, image: sourceImage)
DispatchQueue.main.async { [weak self] in
self?.image = grayscale
}
}
} else {
image = UIImage(data: data)
self.image = sourceImage
}
case let .gifData(url, _, sourceImage):
if isGrayscale,
let sourceImage {
ImageGrayscalifier.queue.async { [weak self] in
let grayscale = ImageGrayscalifier.convert(url: url, image: sourceImage)
DispatchQueue.main.async { [weak self] in
self?.image = grayscale
}
}
} else {
self.image = sourceImage
}
case let .cgImage(url, cgImage):
if isGrayscale {
image = ImageGrayscalifier.convert(url: url, cgImage: cgImage)
ImageGrayscalifier.queue.async { [weak self] in
let grayscale = ImageGrayscalifier.convert(url: url, cgImage: cgImage)
DispatchQueue.main.async { [weak self] in
self?.image = grayscale
}
}
} else {
image = UIImage(cgImage: cgImage)
}
}
DispatchQueue.main.async {
self.image = image
}
}
private func createBadgesView(_ badges: Badges) {
@ -409,8 +433,8 @@ class AttachmentView: GIFImageView {
fileprivate extension AttachmentView {
enum Source {
case imageData(URL, Data)
case gifData(URL, Data)
case image(URL, UIImage)
case gifData(URL, Data, UIImage?)
case cgImage(URL, CGImage)
}