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Fix crash when generating blurhash image for AttachmentView that hasn't been laid out 

It was passing a negative size into the blurhash decoder, which is invalid

Instead, cap the size at 32x32 (letting the image view scale it up when rendering)
This commit is contained in:
Shadowfacts 2022-10-29 11:47:07 -04:00
parent 43aee0ec67
commit 77a6654ff2
2 changed files with 24 additions and 15 deletions
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37
Tusker/Views/Attachments/AttachmentView.swift
View File

@ -26,7 +26,6 @@ class AttachmentView: GIFImageView {
var attachment: Attachment!
var index: Int!
var expectedSize: CGSize!
private var attachmentRequest: ImageCache.Request?
private var source: Source?
@ -37,13 +36,12 @@ class AttachmentView: GIFImageView {
private var isGrayscale = false
init(attachment: Attachment, index: Int, expectedSize: CGSize) {
init(attachment: Attachment, index: Int) {
super.init(image: nil)
commonInit()
self.attachment = attachment
self.index = index
self.expectedSize = expectedSize
loadAttachment()
}
@ -112,18 +110,8 @@ class AttachmentView: GIFImageView {
if let hash = attachment.blurHash {
AttachmentView.queue.async { [weak self] in
guard let self = self else { return }
let size: CGSize
if let meta = self.attachment.meta,
let width = meta.width, let height = meta.height {
size = CGSize(width: width, height: height)
} else if let orig = self.attachment.meta?.original,
let width = orig.width, let height = orig.height {
size = CGSize(width: width, height: height)
} else {
size = self.expectedSize
}
guard var preview = UIImage(blurHash: hash, size: size) else {
guard var preview = UIImage(blurHash: hash, size: self.blurHashSize()) else {
return
}
@ -153,6 +141,27 @@ class AttachmentView: GIFImageView {
}
}
private func blurHashSize() -> CGSize {
if let meta = self.attachment.meta {
let aspectRatio: CGFloat
if let width = meta.width, let height = meta.height {
aspectRatio = CGFloat(width) / CGFloat(height)
} else if let orig = meta.original,
let width = orig.width, let height = orig.height {
aspectRatio = CGFloat(width) / CGFloat(height)
} else {
return CGSize(width: 32, height: 32)
}
if aspectRatio > 1 {
return CGSize(width: 32, height: 32 / aspectRatio)
} else {
return CGSize(width: 32 * aspectRatio, height: 32)
}
} else {
return CGSize(width: 32, height: 32)
}
}
func loadImage() {
let attachmentURL = attachment.url
attachmentRequest = ImageCache.attachments.get(attachmentURL) { [weak self] (data, _) in

2
Tusker/Views/Attachments/AttachmentsContainerView.swift
View File

@ -257,7 +257,7 @@ class AttachmentsContainerView: UIView {
}
let size = CGSize(width: width, height: height)
let attachmentView = AttachmentView(attachment: attachments[index], index: index, expectedSize: size)
let attachmentView = AttachmentView(attachment: attachments[index], index: index)
attachmentView.delegate = delegate
attachmentView.translatesAutoresizingMaskIntoConstraints = false
attachmentView.accessibilityLabel = String(format: NSLocalizedString("Attachment %d", comment: "attachment at index accessiblity label"), index + 1)