Lottie experiments

Tests/LottieMetalTest/SoftwareLottieRenderer/PublicHeaders/SoftwareLottieRenderer/SoftwareLottieRenderer.h

@@ -18,7 +18,7 @@ CGRect getPathNativeBoundingBox(CGPathRef _Nonnull path);
 
 - (instancetype _Nullable)initWithData:(NSData * _Nonnull)data;
 
-- (void)setFrame:(NSInteger)index;
+- (void)setFrame:(CGFloat)index;
 - (UIImage * _Nullable)renderForSize:(CGSize)size useReferenceRendering:(bool)useReferenceRendering canUseMoreMemory:(bool)canUseMoreMemory skipImageGeneration:(bool)skipImageGeneration;
 
 @end

Tests/LottieMetalTest/SoftwareLottieRenderer/Sources/SoftwareLottieRenderer.mm

@@ -53,8 +53,8 @@ CGRect getPathNativeBoundingBox(CGPathRef _Nonnull path) {
     return CGSizeMake(size.x, size.y);
 }
 
-- (void)setFrame:(NSInteger)index {
-    _renderer->setFrame((int)index);
+- (void)setFrame:(CGFloat)index {
+    _renderer->setFrame((float)index);
 }
 
 - (UIImage * _Nullable)renderForSize:(CGSize)size useReferenceRendering:(bool)useReferenceRendering canUseMoreMemory:(bool)canUseMoreMemory skipImageGeneration:(bool)skipImageGeneration {

Tests/LottieMetalTest/Sources/CompareToReferenceRendering.swift

@@ -91,7 +91,7 @@ func processDrawAnimation(baseCachePath: String, path: String, name: String, siz
             let referenceImageData = try! Data(contentsOf: URL(fileURLWithPath: cacheFolderPath + "/frame\(frameIndex)"))
             let referenceImage = decompressImageFrame(data: referenceImageData)
             
-            renderer.setFrame(frameIndex)
+            renderer.setFrame(CGFloat(frameIndex))
             let image = renderer.render(for: size, useReferenceRendering: !useNonReferenceRendering, canUseMoreMemory: false, skipImageGeneration: false)!
             
             let (diffImage, deltaImage) = areImagesEqual(image, referenceImage, allowedDifference: allowedDifference)

Tests/LottieMetalTest/Sources/ViewController.swift

@@ -152,7 +152,7 @@ private final class ManualReferenceCompareTest {
         let bundlePath = Bundle.main.path(forResource: "TestDataBundle", ofType: "bundle")!
         self.fileList = buildAnimationFolderItems(basePath: bundlePath, path: "")
         
-        self.renderSize = CGSize(width: 128.0, height: 128.0)
+        self.renderSize = CGSize(width: 256.0, height: 256.0)
         
         self.view = view
         self.view.backgroundColor = .white
@@ -224,24 +224,24 @@ private final class ManualReferenceCompareTest {
         var animationTime = 0.0
         let secondsPerFrame = 1.0 / Double(renderer.framesPerSecond)
         
-        let frameDisplayLink = SharedDisplayLinkDriver.shared.add { [weak self] deltaTime in
+        let frameDisplayLink = SharedDisplayLinkDriver.shared.add(framesPerSecond: .max, { [weak self] deltaTime in
             guard let self, let currentItem = self.currentItem else {
                 return
             }
             
-            var frameIndex = Int(animationTime / secondsPerFrame)
-            frameIndex = frameIndex % currentItem.renderer.frameCount
+            var frameIndex = animationTime / secondsPerFrame
+            frameIndex = frameIndex.truncatingRemainder(dividingBy: Double(currentItem.renderer.frameCount))
             
             currentItem.renderer.setFrame(frameIndex)
             let image = currentItem.renderer.render(for: self.renderSize, useReferenceRendering: !self.testNonReference, canUseMoreMemory: false, skipImageGeneration: false)!
             self.imageView.image = image
             
-            currentItem.referenceRenderer.setFrame(index: frameIndex)
+            currentItem.referenceRenderer.setFrame(index: Int(frameIndex))
             let referenceImage = currentItem.referenceRenderer.makeImage(width: Int(self.renderSize.width), height: Int(self.renderSize.height))!
             self.referenceImageView.image = referenceImage
             
             animationTime += deltaTime
-        }
+        })
         self.frameDisplayLink = frameDisplayLink
         frameDisplayLink.isPaused = false
     }
@@ -267,7 +267,7 @@ public final class ViewController: UIViewController {
             if #available(iOS 13.0, *) {
                 self.test = ReferenceCompareTest(view: self.view, testNonReference: false)
             }
-        } else if !"".isEmpty {
+        } else if "".isEmpty {
             if #available(iOS 13.0, *) {
                 self.test = ManualReferenceCompareTest(view: self.view)
             }
@@ -308,7 +308,7 @@ public final class ViewController: UIViewController {
                 var numUpdates: Int = 0
                 var frameIndex = 0
                 while true {
-                    animationRenderer.setFrame(frameIndex)
+                    animationRenderer.setFrame(CGFloat(frameIndex))
                     let _ = animationRenderer.render(for: CGSize(width: CGFloat(performanceFrameSize), height: CGFloat(performanceFrameSize)), useReferenceRendering: false, canUseMoreMemory: true, skipImageGeneration: true)
                     frameIndex = (frameIndex + 1) % animationRenderer.frameCount
                     numUpdates += 1

Tests/LottieMetalTest/skia/BUILD

@@ -3,12 +3,18 @@ load("@build_bazel_rules_apple//apple:apple.bzl",
     "apple_dynamic_framework_import",
 )
 
+framework_imports = select({
+    "@build_bazel_rules_apple//apple:ios_arm64": glob([
+        "device/libskia.framework/**"
+    ]),
+    "//build-system:ios_sim_arm64": glob([
+        "simulator/libskia.framework/**"
+    ])
+})
 
 apple_dynamic_framework_import(
     name = "libskia",
-    framework_imports = glob([
-        "libskia.framework/**"
-    ]),
+    framework_imports = framework_imports,
     visibility = ["//visibility:public"],
 )
 

submodules/LottieCpp/lottiecpp

@@ -1 +1 @@
-Subproject commit 4aa40846d24842e1168375c3db79d85e913ca1e9
+Subproject commit 2b10b84f626c66288366f0ad2d6af2a396ec454e