Small tweaks

FlorianDenis · FlorianDenis · commit b8d461b6f1a4 · 2023-01-31T18:08:37.000+01:00
diff --git a/demo/Sources/AboutViewController/AboutViewController.swift b/demo/Sources/AboutViewController/AboutViewController.swift
@@ -31,13 +31,13 @@ class AboutViewController: UIViewController {
             .applyingFilter(CIFilter.bumpDistortion()) {
                 $0.center = center
                 $0.radius = 300
-                $0.scale = Float(1 + cos(CACurrentMediaTime())) / 5
+                $0.scale = 0.2
             }
     }
 
     @IBAction private func panGestureRecognized(_ gesture: UIPanGestureRecognizer) {
         if gesture.state == .began {
-            snapshotImage = CIImage(image: view.snapshot())
+            snapshotImage = view.snapshot()
             mtkView.isPaused = false
             mtkView.isHidden = false
         }
@@ -61,16 +61,10 @@ class AboutViewController: UIViewController {
 
     @IBOutlet var mtkView: MTKView!
 
-    private lazy var device = MTLCreateSystemDefaultDevice()!
+    private let context = CIContext()
+    private let device = MTLCreateSystemDefaultDevice()!
     private lazy var commandQueue = device.makeCommandQueue()!
 
-    private lazy var context = CIContext(
-        mtlCommandQueue: commandQueue,
-        options:  [
-            .cacheIntermediates: false,
-        ]
-    )
-
     override func viewDidLoad() {
         super.viewDidLoad()
         mtkView.device = device
diff --git a/demo/Sources/OnboardingViewController/OnboardingViewController.swift b/demo/Sources/OnboardingViewController/OnboardingViewController.swift
@@ -44,7 +44,7 @@ class OnboardingViewController: UIViewController {
         return backgroundSourceSnapshot
             .applyingFilter(CIFilter.barsSwipeTransition()) {
                 $0.targetImage = backgroundTargetSnapshot
-                $0.angle =  .pi / 4
+                $0.angle =  9 * .pi / 5
                 $0.width = 150
                 $0.time = Float(progress)
             }
@@ -55,9 +55,9 @@ class OnboardingViewController: UIViewController {
         currentImage = (currentImage + 1) % onboardingImageNames.count
         let targetImageName = onboardingImageNames[currentImage]
         
-        backgroundSourceSnapshot = CIImage(image: backgroundView.snapshot())
+        backgroundSourceSnapshot = backgroundView.snapshot()
         backgroundView.image = UIImage(named: targetImageName)
-        backgroundTargetSnapshot = CIImage(image: backgroundView.snapshot())
+        backgroundTargetSnapshot = backgroundView.snapshot()
 
         startTime = CACurrentMediaTime()
         mtkView.isHidden = false
@@ -76,16 +76,10 @@ class OnboardingViewController: UIViewController {
 
     @IBOutlet var mtkView: MTKView!
 
-    private lazy var device = MTLCreateSystemDefaultDevice()!
+    private let context = CIContext()
+    private let device = MTLCreateSystemDefaultDevice()!
     private lazy var commandQueue = device.makeCommandQueue()!
 
-    private lazy var context = CIContext(
-        mtlCommandQueue: commandQueue,
-        options:  [
-            .cacheIntermediates: false,
-        ]
-    )
-
     override func viewDidLoad() {
         super.viewDidLoad()
         mtkView.device = device
diff --git a/demo/Sources/UIView+Snapshot.swift b/demo/Sources/UIView+Snapshot.swift
@@ -5,12 +5,15 @@
 //  Created by Florian Denis on 04/01/2023.
 //
 
+import CoreImage
 import UIKit
 
 extension UIView {
-    public func snapshot() -> UIImage {
+    public func snapshot() -> CIImage? {
         let renderer = UIGraphicsImageRenderer(size: bounds.size)
-        return renderer.image { _ in drawHierarchy(in: bounds, afterScreenUpdates: true) }
+        return CIImage(image: renderer.image { _ in
+            drawHierarchy(in: bounds, afterScreenUpdates: true)
+        })
     }
 }
 
