Tune renderer for GreedyImageView

- Make the renderer a class instead of an actor, as CIContext and CIImage are designed to be thread-safe and we don't need job serialization here, as it is handled by the main actor on the call side.
- Cover the class with protocols to be able to further test GreedyImageView.

Author: igooor-bb

Sources/GreedyKit/Core/Rendering/CoreGraphicsRenderer.swift

@@ -8,7 +8,7 @@
 import CoreGraphics
 import CoreImage
 
-final actor CoreGraphicsRenderer {
+final class CoreGraphicsRenderer: CoreGraphicsRendererProtocol {
     private let context: CIContext
 
     init(

Sources/GreedyKit/Core/Utils/SampleBufferFactory.swift

@@ -10,7 +10,7 @@ import CoreGraphics
 import CoreImage
 import CoreVideo
 
-final actor SampleBufferFactory {
+final actor SampleBufferFactory: SampleBufferFactoryProtocol {
 
     // MARK: Constants
 

Sources/GreedyKit/Helpers/CoreGraphicsRendererProtocol.swift

@@ -0,0 +1,12 @@
+//
+//  CoreGraphicsRendererProtocol.swift
+//  GreedyKit
+//
+//  Created by Igor Belov on 13.07.2025.
+//
+
+import CoreImage
+
+protocol CoreGraphicsRendererProtocol {
+    func cgImage(from ciImage: CIImage) async -> CGImage?
+}

Sources/GreedyKit/Helpers/SampleBufferFactoryProtocol.swift

@@ -0,0 +1,49 @@
+//
+//  SampleBufferFactoryProtocol.swift
+//  GreedyKit
+//
+//  Created by Igor Belov on 11.07.2025.
+//
+
+import AVFoundation
+import CoreImage
+
+protocol SampleBufferFactoryProtocol: Actor {
+    func sampleBuffer(
+        fromPixelBuffer pixelBuffer: CVPixelBuffer,
+        presentationTimeStamp time: CMTime,
+        duration: CMTime
+    ) -> CMSampleBuffer?
+
+    func sampleBuffer(
+        fromCGImage cgImage: CGImage,
+        presentationTimeStamp time: CMTime,
+        duration: CMTime
+    ) -> CMSampleBuffer?
+}
+
+extension SampleBufferFactoryProtocol {
+    func sampleBuffer(
+        fromPixelBuffer pixelBuffer: CVPixelBuffer,
+        presentationTimeStamp time: CMTime = .invalid,
+        duration: CMTime = .zero
+    ) -> CMSampleBuffer? {
+        sampleBuffer(
+            fromPixelBuffer: pixelBuffer,
+            presentationTimeStamp: time,
+            duration: duration
+        )
+    }
+
+    func sampleBuffer(
+        fromCGImage cgImage: CGImage,
+        presentationTimeStamp time: CMTime = .invalid,
+        duration: CMTime = .zero
+    ) -> CMSampleBuffer? {
+        sampleBuffer(
+            fromCGImage: cgImage,
+            presentationTimeStamp: time,
+            duration: duration
+        )
+    }
+}

Sources/GreedyKit/UIKit/GreedyImageView.swift

@@ -51,18 +51,33 @@ public final class GreedyImageView: UIView {
 
     // MARK: - Properties
 
-    private let renderView = BackedRenderView()
-
-    private lazy var sampleBufferFactory = SampleBufferFactory()
-    private lazy var renderer = CoreGraphicsRenderer(
-        debugName: "GreedyImageView",
-        cacheIntermediates: true
-    )
+    private let renderView: RenderViewProtocol
+    private let sampleBufferFactory: SampleBufferFactoryProtocol
+    private let renderer: CoreGraphicsRendererProtocol
 
     // MARK: - Lifecycle
 
-    public override init(frame: CGRect) {
+    init(
+        frame: CGRect = .zero,
+        renderView: RenderViewProtocol,
+        renderer: CoreGraphicsRendererProtocol,
+        sampleBufferFactory: SampleBufferFactoryProtocol
+    ) {
+        self.renderView = renderView
+        self.renderer = renderer
+        self.sampleBufferFactory = sampleBufferFactory
+
         super.init(frame: frame)
+    }
+
+    public override convenience init(frame: CGRect) {
+        self.init(
+            frame: frame,
+            renderView: BackedRenderView(),
+            renderer: CoreGraphicsRenderer(debugName: "GreedyImageView"),
+            sampleBufferFactory: SampleBufferFactory()
+        )
+
         renderView.configure(in: self)
     }