Prioritize backdrop image for cinematic background (#893)

Co-authored-by: Brendan Perry <=>

Shared/Extensions/JellyfinAPI/BaseItemDto+Poster.swift

@@ -74,4 +74,13 @@ extension BaseItemDto: Poster {
             ]
         }
     }
+
+    func cinematicPosterImageSources() -> [ImageSource] {
+        switch type {
+        case .episode:
+            return [seriesImageSource(.backdrop, maxWidth: UIScreen.main.bounds.width)]
+        default:
+            return [imageSource(.backdrop, maxWidth: UIScreen.main.bounds.width)]
+        }
+    }
 }

Shared/Objects/Poster.swift

@@ -15,6 +15,7 @@ protocol Poster: Displayable, Hashable {
 
     func portraitPosterImageSource(maxWidth: CGFloat) -> ImageSource
     func landscapePosterImageSources(maxWidth: CGFloat, single: Bool) -> [ImageSource]
+    func cinematicPosterImageSources() -> [ImageSource]
 }
 
 extension Poster {
@@ -22,4 +23,8 @@ extension Poster {
         hasher.combine(displayTitle)
         hasher.combine(subtitle)
     }
+
+    func cinematicPosterImageSources() -> [ImageSource] {
+        []
+    }
 }

Swiftfin tvOS/Components/CinematicBackgroundView.swift

@@ -26,7 +26,7 @@ struct CinematicBackgroundView<Item: Poster>: View {
         RotateContentView(proxy: proxy)
             .onChange(of: viewModel.currentItem) { newItem in
                 proxy.update {
-                    ImageView(newItem?.landscapePosterImageSources(maxWidth: UIScreen.main.bounds.width, single: false) ?? [])
+                    ImageView(newItem?.cinematicPosterImageSources() ?? [])
                         .placeholder {
                             Color.clear
                         }