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Make DrawingContext initializer failable

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This commit is contained in:
Ali
2022-11-15 13:40:31 +04:00
parent 59e2c74d42
commit f07c30bd5b
39 changed files with 624 additions and 415 deletions
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14
submodules/DirectMediaImageCache/Sources/DirectMediaImageCache.swift
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@@ -12,7 +12,9 @@ import ManagedFile
private func generateBlurredThumbnail(image: UIImage) -> UIImage? {
let thumbnailContextSize = CGSize(width: 32.0, height: 32.0)
let thumbnailContext = DrawingContext(size: thumbnailContextSize, scale: 1.0)
guard let thumbnailContext = DrawingContext(size: thumbnailContextSize, scale: 1.0) else {
return nil
}
let filledSize = image.size.aspectFilled(thumbnailContextSize)
let imageRect = CGRect(origin: CGPoint(x: (thumbnailContextSize.width - filledSize.width) / 2.0, y: (thumbnailContextSize.height - filledSize.height) / 2.0), size: filledSize)
@@ -129,7 +131,9 @@ private func loadImage(data: Data) -> UIImage? {
source.rowBytes = Int(width * 2)
source.data = UnsafeMutableRawPointer(mutating: sourceBytes.advanced(by: 4 + 2 + 2))
let context = DrawingContext(size: CGSize(width: CGFloat(width), height: CGFloat(height)), scale: 1.0, opaque: true, clear: false)
guard let context = DrawingContext(size: CGSize(width: CGFloat(width), height: CGFloat(height)), scale: 1.0, opaque: true, clear: false) else {
return nil
}
var target = vImage_Buffer()
target.width = UInt(width)
@@ -218,7 +222,11 @@ public final class DirectMediaImageCache {
let data = dataSignal.start(next: { data in
if let data = data, let image = UIImage(data: data) {
let scaledSize = CGSize(width: CGFloat(width), height: CGFloat(width))
let scaledContext = DrawingContext(size: scaledSize, scale: 1.0, opaque: true)
guard let scaledContext = DrawingContext(size: scaledSize, scale: 1.0, opaque: true) else {
subscriber.putNext(nil)
subscriber.putCompletion()
return
}
scaledContext.withFlippedContext { context in
let filledSize = image.size.aspectFilled(scaledSize)
let imageRect = CGRect(origin: CGPoint(x: (scaledSize.width - filledSize.width) / 2.0, y: (scaledSize.height - filledSize.height) / 2.0), size: filledSize)