Merge commit '7621e2f8dec938cf48181c8b10afc9b01f444e68' into beta

submodules/TelegramUI/Components/Calls/CallScreen/Sources/CallScreen.swift

@@ -0,0 +1,28 @@
+import Foundation
+import UIKit
+import Display
+import MetalKit
+
+private final class BundleMarker: NSObject {
+}
+
+private var metalLibraryValue: MTLLibrary?
+func metalLibrary(device: MTLDevice) -> MTLLibrary? {
+    if let metalLibraryValue {
+        return metalLibraryValue
+    }
+    
+    let mainBundle = Bundle(for: BundleMarker.self)
+    guard let path = mainBundle.path(forResource: "CallScreenMetalSourcesBundle", ofType: "bundle") else {
+        return nil
+    }
+    guard let bundle = Bundle(path: path) else {
+        return nil
+    }
+    guard let library = try? device.makeDefaultLibrary(bundle: bundle) else {
+        return nil
+    }
+    
+    metalLibraryValue = library
+    return library
+}