Bring some latest fixes (#307)

- Fix gradient interpolation for opacity stops beyond the last color
stop
- Add color value callback to solid layer

.github/dependabot.yml

@@ -0,0 +1,9 @@
+# Dependabot configuration file.
+# See https://docs.github.com/en/code-security/dependabot/dependabot-version-updates
+version: 2
+
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"

.github/workflows/analyze-and-test.yaml

@@ -11,9 +11,9 @@ jobs:
     strategy:
       matrix:
         flutter: ['stable']
-    runs-on: macos-latest
+    runs-on: macos-13
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: subosito/flutter-action@v2
         with:
           channel: ${{ matrix.flutter }}
@@ -37,7 +37,7 @@ jobs:
     name: Check that the web version can compile
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: subosito/flutter-action@v2
         with:
           channel: 'stable'

.github/workflows/publish-on-pub.yaml

@@ -7,23 +7,22 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: subosito/flutter-action@v2
         with:
           channel: 'stable'
       - run: flutter pub get
-      - run: flutter pub run tool/publish/comment_dependency_overrides.dart
-      - run: flutter pub get
       - run: flutter pub run tool/publish/check_version.dart ${GITHUB_REF}
       - name: Setup credentials
         run: |
-          cat <<EOF > $PUB_CACHE/credentials.json
+          mkdir -p $XDG_CONFIG_HOME/dart
+          cat <<EOF > $XDG_CONFIG_HOME/dart/pub-credentials.json
           {
             "accessToken":"${{ secrets.OAUTH_ACCESS_TOKEN }}",
             "refreshToken":"${{ secrets.OAUTH_REFRESH_TOKEN }}",
             "tokenEndpoint":"https://accounts.google.com/o/oauth2/token",
             "scopes": [ "openid", "https://www.googleapis.com/auth/userinfo.email" ],
-            "expiration": 1580681402856
+            "expiration": 1691492965565
           }
           EOF
       - name: Publish package

CHANGELOG.md

@@ -1,4 +1,56 @@
-## [2.0.0]
+## 2.7.0
+- Support loading Fonts from a zip file
+- Fix a bug in Text with strokes
+- Fix gradient interpolation for opacity stops beyond the last color stop
+- Add color value callback to solid layer
+
+## 2.6.0
+- Accept `List<int>` instead of `Uint8List` in `LottieComposition.fromBytes`
+- Stroke line cap defaults to butt instead of square
+
+## 2.5.0
+- Add layer-level opacity option to LottieOptions
+- Fix TextLayer opacity calculation
+
+## 2.4.0
+- Require minimum Dart 3.0.0 and Flutter 3.10.0
+- Fix a parsing bug when the name property in RoundedCorner was null
+
+## 2.3.2
+- Fix a bug when running on the web due to [bitwise operations difference](https://dart.dev/guides/language/numbers#bitwise-operations).
+
+## 2.3.1
+- Fix an assertion for null `ShapeTrimPathType.type`.
+
+## 2.3.0
+- Fixed a failed assertion (`dirty: is not true`) when calling `setState` inside `onLoaded` callback.
+- Update point text y offset
+- Makes static compositions not animate by default
+
+## 2.2.0
+Apply the latest fixes from Lottie-Android:
+
+- Overhaul text layout
+- Fix rounded corners modifying already rounded corners
+- Support box position in Document Data
+- Allow interpolating between gradients with different opacity stops
+- Add support for gradient opacity stops
+
+## 2.1.0
+- Improve the cache to ensure that there is not an empty frame each time we load an animation.  
+  The method `AssetLottie('anim.json').load()` returns a `SynchronousFuture` if it has been loaded previously.
+- Expose the `LottieCache` singleton.
+  It allows to change the cache behaviour and clear the entries.
+
+```dart
+void main() {
+  Lottie.cache.maximumSize = 10;
+  Lottie.cache.clear();
+  Lottie.cache.evict(NetworkLottie('https://lottie.com/anim.json'));
+}
+```
+
+## 2.0.0
 - **Breaking change**: the lottie widget will be smaller if it relies on the intrinsic size of the composition. 
 
 Previously the lottie parser was automatically multiplying the size of the composition by `window.devicePixelRatio`.
@@ -20,19 +72,19 @@ Scaffold(
 );
 ```
 
-## [1.4.3]
+## 1.4.3
 - Fixed some lints with Flutter 3.3. 
 
-## [1.4.2]
+## 1.4.2
 - Use `FilterQuality.low` as default to draw image layers.
 
-## [1.4.1]
+## 1.4.1
 - Allow `AlignmentGeometry` for `alignment`.
 
-## [1.4.0]
+## 1.4.0
 - Added `filterQuality` property to control the performance vs quality trade-off to use when drawing images
 
-## [1.3.0]
+## 1.3.0
 - Added support for rounded corners on shapes and rects
 - Add support for text in dynamic properties (`ValueDelegate`)
 
@@ -54,13 +106,13 @@ Lottie.asset(
 - Add support for reversed polystar paths
 - Enforce order of operations to avoid rounding errors
 
-## [1.2.2]
+## 1.2.2
 - Internal maintenance: fix lints for Flutter 2.10
 
-## [1.2.1]
+## 1.2.1
 - Fix: Revert Cubic to `PathInterpolator.cubic`
 
-## [1.2.0]
+## 1.2.0
 - Add support for gaussian blurs.
 
 Example to blur some elements dynamically:
@@ -97,7 +149,7 @@ Lottie.asset(
 )
 ```
 
-## [1.1.0]
+## 1.1.0
 - Add `errorBuilder` callback to provide an alternative widget in case an error occurs during loading.
 ```dart
 Lottie.network(
@@ -119,25 +171,25 @@ Lottie.network(
   ```
 - Various bug fixes
 
-## [1.0.1]
+## 1.0.1
 - Implement `RenderBox.computeDryLayout`
 
-## [1.0.0]
+## 1.0.0
 - Migrate to null safety
 - Fix some rendering bugs
 - Add an image delegate to dynamically change images
 - Allow to use an imageProviderFactory with a zip file
 
-## [0.7.1]
+## 0.7.1
 - Fix a crash for some lottie file with empty paths.
 
-## [0.7.0+1]
+## 0.7.0+1
 - Fix Flutter Web compilation error
 
-## [0.7.0]
+## 0.7.0
 - Performance improvement for complex animations.
 
-## [0.6.0]
+## 0.6.0
 - Runs the animation at the frame rate specified in the json file (ie. An animation encoded with a 20 FPS will only
   be paint 20 times per seconds even though the AnimationController will invalidate the widget 60 times per seconds).  
   A new property `frameRate` allows to opt-out this behavior and have the widget to repaint at the device frame rate 
@@ -148,20 +200,20 @@ Lottie.network(
 - Fix a bug where we would call `markNeedPaint` when the animation was not changing. This removes unnecessary paints in
   animations with static periods.
 
-## [0.5.1]
+## 0.5.1
 - Remove direct dependencies on dart:io to support Flutter Web
 
-## [0.5.0]
+## 0.5.0
 - Support loading animation from network in a web app
 - Fix a couple of bugs with the web dev compiler
 
-## [0.4.1]
+## 0.4.1
 - Support color value stored as RGB, not RGBA 
 
-## [0.4.0+1]
+## 0.4.0+1
 - Support latest version of the `characters` package
 
-## [0.4.0]
+## 0.4.0
 - Disable "Merge paths" by default and provide an option to enable them.  
 This is the same behavior as in Lottie-android.  
 Merge paths currently don't work if the the operand shape is entirely contained within the
@@ -174,62 +226,62 @@ Lottie.asset('file.json', options: LottieOptions(enableMergePaths: true));
 ```
 
 
-## [0.3.6]
+## 0.3.6
 - Export the `Marker` class
 
-## [0.3.5]
+## 0.3.5
 - Fix a bug with a wrongly clipped rectangle. 
 
-## [0.3.4]
+## 0.3.4
 - Fix a bug with dashed path
 
-## [0.3.3]
+## 0.3.3
 - Fix a bug with rounded rectangle shape
 
-## [0.3.2]
+## 0.3.2
 - Fix a bug with "repeater" content
 
-## [0.3.1]
+## 0.3.1
 - Support dashed path
 
-## [0.3.0+1]
+## 0.3.0+1
 - Specify a version range for the dependency on `characters`.
 
-## [0.3.0]
+## 0.3.0
 - Add `LottieDelegates` a group of options to customize the lottie animation at runtime.
   ie: Dynamically modify color, position, size, text... of every elements of the animation.
 - Correctly display Linear and Radial Gradients
 - Integrate latest changes from Lottie-android
 
-## [0.2.2]
+## 0.2.2
 - Add a [repeat] parameter to specify if the automatic animation should loop.
 - Add the [animate], [reverse], [repeat] properties on `LottieBuilder`
 - Fix bug with `onLoaded` callback when the `LottieProvider` is changed
 
-## [0.2.1]
+## 0.2.1
 - Fix a big bug in the path transformation code. A lot more animations look correct now.
 
-## [0.2.0+1]
+## 0.2.0+1
 - Improve readme
 - (internal) Add golden tests
 
-## [0.2.0]
+## 0.2.0
 - Support loading the animation and its images from a zip file
 - Breaking: `LottieComposition.fromBytes` and `fromByteData` are now asynchronous.
 
-## [0.1.4]
+## 0.1.4
 - Support images in animation
 - Basic support for text in animation (work in progress)
 
-## [0.1.3]
+## 0.1.3
 - Support Polystar shape
 - Reorganize examples.
 
-## [0.1.2]
+## 0.1.2
 - Implement `Lottie.network`, `Lottie.file` and `Lottie.memory`
 
-## [0.1.1]
+## 0.1.1
 - Fix analysis lints
 
-## [0.1.0]
+## 0.1.0
 - Initial conversion of [lottie-android](https://github.com/airbnb/lottie-android) to Dart/Flutter

README.md

@@ -23,7 +23,7 @@ import 'package:lottie/lottie.dart';
 void main() => runApp(const MyApp());
 
 class MyApp extends StatelessWidget {
-  const MyApp({Key? key}) : super(key: key);
+  const MyApp({super.key});
 
   @override
   Widget build(BuildContext context) {
@@ -61,7 +61,7 @@ import 'package:lottie/lottie.dart';
 void main() => runApp(const MyApp());
 
 class MyApp extends StatefulWidget {
-  const MyApp({Key? key}) : super(key: key);
+  const MyApp({super.key});
 
   @override
   State<MyApp> createState() => _MyAppState();
@@ -129,14 +129,13 @@ animation.
 The `Lottie` widget has several convenient constructors (`Lottie.asset`, `Lottie.network`, `Lottie.memory`) to load, parse and
 cache automatically the json file.
 
-Sometime you may prefer to have full control over the loading of the file. Use `LottieComposition.fromByteData` to 
-parse the file from a list of bytes.
+Sometime you may prefer to have full control over the loading of the file. Use `AssetLottie` (or `NetworkLottie`, `MemoryLottie`) to load a lottie composition from a json file.
 
 This example shows how to load and parse a Lottie composition from a json file.  
 
 ```dart
 class MyWidget extends StatefulWidget {
-  const MyWidget({Key? key}) : super(key: key);
+  const MyWidget({super.key});
 
   @override
   State<MyWidget> createState() => _MyWidgetState();
@@ -149,12 +148,7 @@ class _MyWidgetState extends State<MyWidget> {
   void initState() {
     super.initState();
 
-    _composition = _loadComposition();
-  }
-
-  Future<LottieComposition> _loadComposition() async {
-    var assetData = await rootBundle.load('assets/LottieLogo1.json');
-    return await LottieComposition.fromByteData(assetData);
+    _composition = AssetLottie('assets/LottieLogo1.json').load();
   }
 
   @override
@@ -182,7 +176,7 @@ a specific position and size.
 class CustomDrawer extends StatelessWidget {
   final LottieComposition composition;
 
-  const CustomDrawer(this.composition, {Key? key}) : super(key: key);
+  const CustomDrawer(this.composition, {super.key});
 
   @override
   Widget build(BuildContext context) {

README.template.md

@@ -51,8 +51,7 @@ animation.
 The `Lottie` widget has several convenient constructors (`Lottie.asset`, `Lottie.network`, `Lottie.memory`) to load, parse and
 cache automatically the json file.
 
-Sometime you may prefer to have full control over the loading of the file. Use `LottieComposition.fromByteData` to 
-parse the file from a list of bytes.
+Sometime you may prefer to have full control over the loading of the file. Use `AssetLottie` (or `NetworkLottie`, `MemoryLottie`) to load a lottie composition from a json file.
 
 This example shows how to load and parse a Lottie composition from a json file.  
 

analysis_options.yaml

@@ -1,29 +1,59 @@
 include: package:flutter_lints/flutter.yaml
 analyzer:
-  strong-mode:
-    implicit-casts: false
-    implicit-dynamic: false
+  language:
+    strict-casts: true
+    strict-inference: true
 linter:
   rules:
     avoid_print: false
 
     always_declare_return_types: true
+    avoid_bool_literals_in_conditional_expressions: true
+    avoid_double_and_int_checks: true
     avoid_dynamic_calls: true
+    avoid_equals_and_hash_code_on_mutable_classes: true
     avoid_escaping_inner_quotes: true
+    avoid_final_parameters: true
+    avoid_function_literals_in_foreach_calls: true
+    avoid_js_rounded_ints: true
+    avoid_positional_boolean_parameters: true
+    avoid_redundant_argument_values: true
+    avoid_returning_null_for_future: true
     avoid_setters_without_getters: true
+    avoid_type_to_string: true
+    avoid_unused_constructor_parameters: true
+    cancel_subscriptions: true
     cast_nullable_to_non_nullable: true
     close_sinks: true
+    collection_methods_unrelated_type: true
+    combinators_ordering: true
+    conditional_uri_does_not_exist: true
+    dangling_library_doc_comments: true
+    deprecated_consistency: true
+    implicit_reopen: true
+    invalid_case_patterns: true
+    leading_newlines_in_multiline_strings: true
+    library_annotations: true
     no_adjacent_strings_in_list: true
     no_default_cases: true
+    noop_primitive_operations: true
     omit_local_variable_types: true
     only_throw_errors: true
-    prefer_interpolation_to_compose_strings: true
+    prefer_if_elements_to_conditional_expressions: true
+    prefer_relative_imports: true
     prefer_single_quotes: true
     sort_child_properties_last: true
     sort_pub_dependencies: true
     test_types_in_equals: true
     unawaited_futures: true
+    unnecessary_breaks: true
+    unnecessary_library_directive: true
     unnecessary_parenthesis: true
     unnecessary_statements: true
+    unnecessary_to_list_in_spreads: true
     unsafe_html: true
+    use_enums: true
+    use_if_null_to_convert_nulls_to_bools: true
+    use_named_constants: true
     use_raw_strings: true
+    use_super_parameters: true

example/README.md

@@ -9,7 +9,7 @@ import 'package:lottie/lottie.dart';
 void main() => runApp(const MyApp());
 
 class MyApp extends StatelessWidget {
-  const MyApp({Key? key}) : super(key: key);
+  const MyApp({super.key});
 
   @override
   Widget build(BuildContext context) {

example/assets/GradientColorInterpolation.json

@@ -0,0 +1,441 @@
+{
+  "v": "4.8.0",
+  "meta": {
+    "g": "LottieFiles AE 3.1.1",
+    "a": "",
+    "k": "",
+    "d": "",
+    "tc": ""
+  },
+  "fr": 30,
+  "ip": 0,
+  "op": 151,
+  "w": 430,
+  "h": 932,
+  "nm": "Sticker Unpack",
+  "ddd": 1,
+  "assets": [
+    {
+      "id": "comp_0",
+      "layers": [
+      ]
+    }
+  ],
+  "layers": [
+    {
+      "ddd": 1,
+      "ind": 1,
+      "ty": 0,
+      "nm": "Pc_Sticker Pack",
+      "refId": "comp_0",
+      "sr": 1,
+      "ks": {
+        "o": {
+          "a": 0,
+          "k": 100,
+          "ix": 11
+        },
+        "rx": {
+          "a": 1,
+          "k": [
+            {
+              "i": {
+                "x": [
+                  0.421
+                ],
+                "y": [
+                  1
+                ]
+              },
+              "o": {
+                "x": [
+                  0.55
+                ],
+                "y": [
+                  0
+                ]
+              },
+              "t": 1,
+              "s": [
+                0
+              ]
+            },
+            {
+              "i": {
+                "x": [
+                  0.985
+                ],
+                "y": [
+                  0.168
+                ]
+              },
+              "o": {
+                "x": [
+                  0.857
+                ],
+                "y": [
+                  0
+                ]
+              },
+              "t": 21,
+              "s": [
+                -1.9
+              ]
+            },
+            {
+              "t": 41,
+              "s": [
+                24.3
+              ]
+            }
+          ],
+          "ix": 8
+        },
+        "ry": {
+          "a": 1,
+          "k": [
+            {
+              "i": {
+                "x": [
+                  0.421
+                ],
+                "y": [
+                  1
+                ]
+              },
+              "o": {
+                "x": [
+                  0.55
+                ],
+                "y": [
+                  0
+                ]
+              },
+              "t": 1,
+              "s": [
+                0
+              ]
+            },
+            {
+              "i": {
+                "x": [
+                  0.985
+                ],
+                "y": [
+                  -0.28
+                ]
+              },
+              "o": {
+                "x": [
+                  0.857
+                ],
+                "y": [
+                  0
+                ]
+              },
+              "t": 21,
+              "s": [
+                3.7
+              ]
+            },
+            {
+              "t": 41,
+              "s": [
+                16
+              ]
+            }
+          ],
+          "ix": 9
+        },
+        "rz": {
+          "a": 0,
+          "k": 0,
+          "ix": 10
+        },
+        "or": {
+          "a": 0,
+          "k": [
+            0,
+            0,
+            0
+          ],
+          "ix": 7
+        },
+        "p": {
+          "s": true,
+          "x": {
+            "a": 0,
+            "k": 215,
+            "ix": 3
+          },
+          "y": {
+            "a": 0,
+            "k": 466,
+            "ix": 4
+          },
+          "z": {
+            "a": 0,
+            "k": 0,
+            "ix": 5
+          }
+        },
+        "a": {
+          "a": 0,
+          "k": [
+            221,
+            307.5,
+            0
+          ],
+          "ix": 1
+        },
+        "s": {
+          "a": 1,
+          "k": [
+            {
+              "i": {
+                "x": [
+                  0.421,
+                  0.421,
+                  0.667
+                ],
+                "y": [
+                  1,
+                  1,
+                  1
+                ]
+              },
+              "o": {
+                "x": [
+                  0.55,
+                  0.55,
+                  0.333
+                ],
+                "y": [
+                  0,
+                  0,
+                  0
+                ]
+              },
+              "t": 0,
+              "s": [
+                64.6,
+                64.6,
+                100
+              ]
+            },
+            {
+              "i": {
+                "x": [
+                  0.985,
+                  0.985,
+                  0.667
+                ],
+                "y": [
+                  0.192,
+                  0.192,
+                  1
+                ]
+              },
+              "o": {
+                "x": [
+                  0.857,
+                  0.857,
+                  0.333
+                ],
+                "y": [
+                  0,
+                  0,
+                  0
+                ]
+              },
+              "t": 20,
+              "s": [
+                74.2,
+                74.2,
+                100
+              ]
+            },
+            {
+              "t": 40,
+              "s": [
+                7,
+                7,
+                100
+              ]
+            }
+          ],
+          "ix": 6
+        }
+      },
+      "ao": 0,
+      "w": 442,
+      "h": 615,
+      "ip": 0,
+      "op": 41,
+      "st": 0,
+      "bm": 0
+    },
+    {
+      "ddd": 0,
+      "ind": 14,
+      "ty": 4,
+      "nm": "Shape Layer 2",
+      "parent": 1,
+      "sr": 1,
+      "ks": {
+        "o": {
+          "a": 0,
+          "k": 100,
+          "ix": 11
+        },
+        "r": {
+          "a": 0,
+          "k": 0,
+          "ix": 10
+        },
+        "p": {
+          "a": 0,
+          "k": [
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+            307.5,
+            0
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+        },
+        "a": {
+          "a": 0,
+          "k": [
+            0,
+            0,
+            0
+          ],
+          "ix": 1
+        },
+        "s": {
+          "a": 0,
+          "k": [
+            538.543,
+            538.543,
+            100
+          ],
+          "ix": 6
+        }
+      },
+      "ao": 0,
+      "shapes": [
+        {
+          "ty": "gr",
+          "it": [
+            {
+              "ty": "rc",
+              "d": 1,
+              "s": {
+                "a": 0,
+                "k": [
+                  294,
+                  403
+                ],
+                "ix": 2
+              },
+              "p": {
+                "a": 0,
+                "k": [
+                  0,
+                  0
+                ],
+                "ix": 3
+              },
+              "r": {
+                "a": 0,
+                "k": 0,
+                "ix": 4
+              },
+              "nm": "Rectangle Path 1",
+              "mn": "ADBE Vector Shape - Rect",
+              "hd": false
+            },
+            {
+              "ty": "gf",
+              "o": {
+                "a": 0,
+                "k": 100,
+                "ix": 10
+              },
+              "r": 1,
+              "bm": 0,
+              "g": {
+                "p": 3,
+                "k": {
+                  "a": 0,
+                  "k": [
+                    0,
+                    0.373,
+                    0.024,
+                    0.898,
+                    0.359,
+                    0.186,
+                    0.012,
+                    0.449,
+                    0.998,
+                    0,
+                    0,
+                    0,
+                    0,
+                    1,
+                    0.5,
+                    0.5,
+                    1,
+                    0
+                  ],
+                  "ix": 9
+                }
+              },
+              "s": {
+                "a": 0,
+                "k": [
+                  0,
+                  0
+                ],
+                "ix": 5
+              },
+              "e": {
+                "a": 0,
+                "k": [
+                  149,
+                  0
+                ],
+                "ix": 6
+              },
+              "t": 2,
+              "h": {
+                "a": 0,
+                "k": 0,
+                "ix": 7
+              },
+              "a": {
+                "a": 0,
+                "k": 0,
+                "ix": 8
+              },
+              "nm": "Gradient Fill 1",
+              "mn": "ADBE Vector Graphic - G-Fill",
+              "hd": false
+            }
+          ],
+          "nm": "Rectangle 1",
+          "np": 3,
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example/assets/Tests/BeyondBounds.json

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example/assets/Tests/Framerate.json

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example/assets/Tests/LargeComposition.json

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example/assets/Tests/OpacityStops.json

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example/assets/Tests/RoundedWithAlreadyRoundedCorners.json

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example/assets/pass_loading.json

@@ -0,0 +1 @@
+{"v":"5.12.1","fr":60,"ip":0,"op":120,"w":853,"h":480,"nm":"Comp 1","ddd":0,"assets":[],"fonts":{"list":[{"fName":"Pretendard-Bold","fFamily":"Pretendard","fStyle":"Bold","ascent":70.7131249997765}]},"layers":[{"ddd":0,"ind":1,"ty":5,"nm":"PASS","sr":1,"ks":{"o":{"a":0,"k":100,"ix":11},"r":{"a":0,"k":0,"ix":10},"p":{"a":0,"k":[426,235.889,0],"ix":2,"l":2},"a":{"a":0,"k":[6.157,-60.098,0],"ix":1,"l":2},"s":{"a":0,"k":[100,100,100],"ix":6,"l":2}},"ao":0,"t":{"d":{"k":[{"s":{"s":170,"f":"Pretendard-Bold","t":"PASS","ca":0,"j":2,"tr":49,"lh":317,"ls":0,"fc":[1,1,1],"sc":[0.941,0.941,0.941],"sw":0.00999999977648,"of":true},"t":0}]},"p":{},"m":{"g":1,"a":{"a":0,"k":[0,0],"ix":2}},"a":[{"nm":"Animator 1","s":{"t":0,"xe":{"a":0,"k":0,"ix":7},"ne":{"a":0,"k":0,"ix":8},"a":{"a":0,"k":100,"ix":4},"b":1,"rn":0,"sh":1,"sm":{"a":0,"k":100,"ix":6},"s":{"a":1,"k":[{"i":{"x":[0.205],"y":[1]},"o":{"x":[0.77],"y":[0]},"t":10,"s":[0]},{"t":47,"s":[100]}],"ix":1},"r":1},"a":{"p":{"a":0,"k":[0,88,0],"ix":2},"o":{"a":0,"k":0,"ix":9},"t":{"a":0,"k":-66,"ix":89}}},{"nm":"Animator 2","s":{"t":0,"xe":{"a":0,"k":0,"ix":7},"ne":{"a":0,"k":0,"ix":8},"a":{"a":0,"k":100,"ix":4},"b":1,"rn":0,"sh":1,"sm":{"a":0,"k":100,"ix":6},"r":1},"a":{"t":{"a":1,"k":[{"i":{"x":[0.092],"y":[1]},"o":{"x":[0.887],"y":[0]},"t":46,"s":[-7]},{"t":90,"s":[4]}],"ix":89}}}]},"ip":10,"op":130,"st":10,"ct":1,"bm":0},{"ddd":0,"ind":2,"ty":1,"nm":"Dark Turquoise Solid 1","sr":1,"ks":{"o":{"a":0,"k":100,"ix":11},"r":{"a":0,"k":0,"ix":10},"p":{"a":0,"k":[426.5,240,0],"ix":2,"l":2},"a":{"a":0,"k":[75,50,0],"ix":1,"l":2},"s":{"a":0,"k":[568.667,480,100],"ix":6,"l":2}},"ao":0,"sw":150,"sh":100,"sc":"#003626","ip":0,"op":120,"st":0,"bm":0}],"markers":[],"props":{},"chars":[{"ch":"P","size":170,"style":"Bold","w":62.3,"data":{"shapes":[{"ty":"gr","it":[{"ind":0,"ty":"sh","ix":1,"ks":{"a":0,"k":{"i":[[0,0],[0,0],[0,0],[0,0],[0,14.16],[16.113,0],[0,0]],"o":[[0,0],[0,0],[0,0],[16.309,0],[0,-13.965],[0,0],[0,0]],"v":[[5.957,0],[20.605,0],[20.605,-23.047],[33.301,-23.047],[58.984,-46.875],[33.691,-70.703],[5.957,-70.703]],"c":true},"ix":2},"nm":"P","mn":"ADBE Vector Shape - Group","hd":false},{"ind":1,"ty":"sh","ix":2,"ks":{"a":0,"k":{"i":[[0,0],[0,0],[0,0],[0,-7.031],[8.691,0]],"o":[[0,0],[0,0],[8.691,0],[0,7.129],[0,0]],"v":[[20.605,-34.863],[20.605,-58.691],[30.957,-58.691],[43.848,-46.875],[30.957,-34.863]],"c":true},"ix":2},"nm":"P","mn":"ADBE Vector Shape - Group","hd":false}],"nm":"P","np":5,"cix":2,"bm":0,"ix":1,"mn":"ADBE Vector Group","hd":false}]},"fFamily":"Pretendard"},{"ch":"A","size":170,"style":"Bold","w":71.78,"data":{"shapes":[{"ty":"gr","it":[{"ind":0,"ty":"sh","ix":1,"ks":{"a":0,"k":{"i":[[0,0],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0]],"o":[[0,0],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0],[0,0]],"v":[[17.773,0],[23.145,-16.309],[48.73,-16.309],[54.004,0],[69.727,0],[45.312,-70.703],[26.465,-70.703],[1.953,0]],"c":true},"ix":2},"nm":"A","mn":"ADBE Vector Shape - Group","hd":false},{"ind":1,"ty":"sh","ix":2,"ks":{"a":0,"k":{"i":[[0,0],[0,0],[0,0],[0,0]],"o":[[0,0],[0,0],[0,0],[0,0]],"v":[[26.855,-27.734],[35.645,-54.785],[36.133,-54.785],[45.02,-27.734]],"c":true},"ix":2},"nm":"A","mn":"ADBE Vector Shape - Group","hd":false}],"nm":"A","np":5,"cix":2,"bm":0,"ix":1,"mn":"ADBE Vector Group","hd":false}]},"fFamily":"Pretendard"},{"ch":"S","size":170,"style":"Bold","w":62.99,"data":{"shapes":[{"ty":"gr","it":[{"ind":0,"ty":"sh","ix":1,"ks":{"a":0,"k":{"i":[[-0.586,-5.566],[0,0],[15.625,0],[0,-12.891],[-11.914,-2.93],[0,0],[0,-4.785],[7.715,0],[0.488,7.129],[0,0],[-17.09,0],[0,12.988],[12.109,2.734],[0,0],[-0.098,5.078],[-7.422,0]],"o":[[0,0],[-0.195,-12.5],[-15.43,0],[0,10.352],[0,0],[7.715,1.953],[0,5.273],[-7.812,0],[0,0],[0.391,15.137],[17.188,0],[0,-11.816],[0,0],[-6.055,-1.367],[0.098,-4.688],[7.129,0]],"v":[[44.336,-50.488],[58.398,-50.488],[32.227,-71.68],[5.469,-50.293],[24.707,-31.055],[32.422,-29.199],[44.531,-20.215],[31.836,-11.328],[17.871,-22.07],[3.613,-22.07],[32.031,0.977],[59.375,-20.215],[38.184,-40.918],[31.836,-42.48],[20.508,-51.27],[32.129,-59.375]],"c":true},"ix":2},"nm":"S","mn":"ADBE Vector Shape - Group","hd":false}],"nm":"S","np":3,"cix":2,"bm":0,"ix":1,"mn":"ADBE Vector Group","hd":false}]},"fFamily":"Pretendard"}]}

example/lib/examples/alert_dialog.dart

@@ -5,7 +5,7 @@ import 'package:lottie/lottie.dart';
 void main() => runApp(const App());
 
 class App extends StatelessWidget {
-  const App({Key? key}) : super(key: key);
+  const App({super.key});
 
   @override
   Widget build(BuildContext context) {

example/lib/examples/animate_no_repeat.dart

@@ -6,7 +6,7 @@ void main() async {
 }
 
 class App extends StatelessWidget {
-  const App({Key? key}) : super(key: key);
+  const App({super.key});
 
   @override
   Widget build(BuildContext context) {

example/lib/examples/animation_controller.dart

@@ -4,7 +4,7 @@ import 'package:lottie/lottie.dart';
 void main() => runApp(const MyApp());
 
 class MyApp extends StatefulWidget {
-  const MyApp({Key? key}) : super(key: key);
+  const MyApp({super.key});
 
   @override
   State<MyApp> createState() => _MyAppState();

example/lib/examples/animation_full_control.dart

@@ -12,7 +12,7 @@ import 'package:lottie/lottie.dart';
 void main() => runApp(const MyApp());
 
 class MyApp extends StatefulWidget {
-  const MyApp({Key? key}) : super(key: key);
+  const MyApp({super.key});
 
   @override
   State<MyApp> createState() => _MyAppState();

example/lib/examples/blur.dart

@@ -4,7 +4,7 @@ import 'package:lottie/lottie.dart';
 void main() => runApp(const MyApp());
 
 class MyApp extends StatelessWidget {
-  const MyApp({Key? key}) : super(key: key);
+  const MyApp({super.key});
 
   @override
   Widget build(BuildContext context) {

example/lib/examples/cache.dart

@@ -0,0 +1,59 @@
+import 'package:flutter/material.dart';
+import 'package:lottie/lottie.dart';
+
+void main() => runApp(const App());
+
+class App extends StatelessWidget {
+  const App({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      home: Scaffold(body: _Page()),
+    );
+  }
+}
+
+class _Page extends StatefulWidget {
+  @override
+  __PageState createState() => __PageState();
+}
+
+class __PageState extends State<_Page> {
+  var _animationKey = UniqueKey();
+
+  @override
+  void initState() {
+    super.initState();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Column(
+      children: [
+        Lottie.network(
+          'https://assets10.lottiefiles.com/datafiles/QeC7XD39x4C1CIj/data.json',
+          key: _animationKey,
+          fit: BoxFit.contain,
+          width: 200,
+          height: 200,
+        ),
+        ElevatedButton(
+          onPressed: () {
+            Lottie.cache.clear();
+            Lottie.cache.maximumSize = 10;
+          },
+          child: const Text('Clear cache'),
+        ),
+        ElevatedButton(
+          onPressed: () {
+            setState(() {
+              _animationKey = UniqueKey();
+            });
+          },
+          child: const Text('Recreate animation'),
+        ),
+      ],
+    );
+  }
+}

example/lib/examples/custom_draw.dart

@@ -5,7 +5,7 @@ import 'package:lottie/lottie.dart';
 void main() => runApp(const MyApp());
 
 class MyApp extends StatelessWidget {
-  const MyApp({Key? key}) : super(key: key);
+  const MyApp({super.key});
 
   @override
   Widget build(BuildContext context) {
@@ -18,7 +18,7 @@ class MyApp extends StatelessWidget {
 }
 
 class MyWidget extends StatefulWidget {
-  const MyWidget({Key? key}) : super(key: key);
+  const MyWidget({super.key});
 
   @override
   State<MyWidget> createState() => _MyWidgetState();
@@ -60,7 +60,7 @@ class _MyWidgetState extends State<MyWidget> {
 class CustomDrawer extends StatelessWidget {
   final LottieComposition composition;
 
-  const CustomDrawer(this.composition, {Key? key}) : super(key: key);
+  const CustomDrawer(this.composition, {super.key});
 
   @override
   Widget build(BuildContext context) {

example/lib/examples/custom_load.dart

@@ -1,11 +1,10 @@
 import 'package:flutter/material.dart';
-import 'package:flutter/services.dart';
 import 'package:lottie/lottie.dart';
 
 void main() => runApp(const MyApp());
 
 class MyApp extends StatelessWidget {
-  const MyApp({Key? key}) : super(key: key);
+  const MyApp({super.key});
 
   @override
   Widget build(BuildContext context) {
@@ -19,7 +18,7 @@ class MyApp extends StatelessWidget {
 
 //--- example
 class MyWidget extends StatefulWidget {
-  const MyWidget({Key? key}) : super(key: key);
+  const MyWidget({super.key});
 
   @override
   State<MyWidget> createState() => _MyWidgetState();
@@ -32,12 +31,7 @@ class _MyWidgetState extends State<MyWidget> {
   void initState() {
     super.initState();
 
-    _composition = _loadComposition();
-  }
-
-  Future<LottieComposition> _loadComposition() async {
-    var assetData = await rootBundle.load('assets/LottieLogo1.json');
-    return await LottieComposition.fromByteData(assetData);
+    _composition = AssetLottie('assets/LottieLogo1.json').load();
   }
 
   @override

example/lib/examples/draw_cache.dart

@@ -0,0 +1,130 @@
+import 'dart:ui';
+import 'package:flutter/material.dart' hide Image;
+import 'package:flutter/material.dart' as material;
+import 'package:lottie/lottie.dart';
+
+/// This example shows how to cache the animation as a List<Image>.
+/// After the initial cache of each frame, drawing the animation is almost free
+/// in term of CPU usage.
+/// The animation will run at a specific framerate (not FrameRate.max) and specific size
+void main() async {
+  WidgetsFlutterBinding.ensureInitialized();
+
+  // Pre-load the animation for simplicity in this example
+  var animation = await AssetLottie('assets/AndroidWave.json').load();
+
+  // Pick a specific size for our cache.
+  // In a real app, we may want to defer choosing the size after an initial
+  // Layout (ie. using LayoutBuilder)
+  var cachedAnimation = CachedLottie(const Size(150, 200), animation);
+  runApp(_Example(
+    lottie: cachedAnimation,
+  ));
+}
+
+class _Example extends StatelessWidget {
+  final CachedLottie lottie;
+
+  const _Example({required this.lottie});
+
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      home: Scaffold(
+        appBar: AppBar(
+          title: const Text('Cache'),
+        ),
+        body: ListView(
+          children: [
+            for (var i = 0; i < 20; i++)
+              Stack(
+                children: [
+                  for (var j = 0; j < 50; j++)
+                    Transform.translate(
+                      offset: Offset(j.toDouble() * 20, 0),
+                      child: CachedLottiePlayer(
+                        lottie: lottie,
+                      ),
+                    )
+                ],
+              ),
+          ],
+        ),
+      ),
+    );
+  }
+}
+
+class CachedLottie {
+  final Size size;
+  final LottieComposition composition;
+  final List<Image?> images;
+  late final _drawable = LottieDrawable(composition);
+
+  CachedLottie(this.size, this.composition)
+      : images = List.filled(composition.durationFrames.ceil(), null);
+
+  Duration get duration => composition.duration;
+
+  Image imageAt(BuildContext context, double progress) {
+    var index = (images.length * progress).round() % images.length;
+    return images[index] ??= _takeImage(context, progress);
+  }
+
+  Image _takeImage(BuildContext context, double progress) {
+    var recorder = PictureRecorder();
+    var canvas = Canvas(recorder);
+
+    var devicePixelRatio = View.of(context).devicePixelRatio;
+
+    _drawable
+      ..setProgress(progress)
+      ..draw(canvas, Offset.zero & (size * devicePixelRatio));
+    var picture = recorder.endRecording();
+    return picture.toImageSync((size.width * devicePixelRatio).round(),
+        (size.height * devicePixelRatio).round());
+  }
+}
+
+class CachedLottiePlayer extends StatefulWidget {
+  final CachedLottie lottie;
+  final AnimationController? controller;
+
+  const CachedLottiePlayer({
+    super.key,
+    required this.lottie,
+    this.controller,
+  });
+
+  @override
+  State<CachedLottiePlayer> createState() => _CachedLottiePlayerState();
+}
+
+class _CachedLottiePlayerState extends State<CachedLottiePlayer>
+    with TickerProviderStateMixin {
+  late final AnimationController _autoController =
+      AnimationController(vsync: this, duration: widget.lottie.duration)
+        ..repeat();
+
+  @override
+  Widget build(BuildContext context) {
+    var controller = widget.controller ?? _autoController;
+    return AnimatedBuilder(
+      animation: controller,
+      builder: (context, _) {
+        var image = widget.lottie.imageAt(context, controller.value);
+        return material.RawImage(
+          image: image,
+          width: widget.lottie.size.width,
+          height: widget.lottie.size.height,
+        );
+      },
+    );
+  }
+
+  @override
+  void dispose() {
+    _autoController.dispose();
+    super.dispose();
+  }
+}

example/lib/examples/drop_shadow.dart

@@ -4,7 +4,7 @@ import 'package:lottie/lottie.dart';
 void main() => runApp(const MyApp());
 
 class MyApp extends StatelessWidget {
-  const MyApp({Key? key}) : super(key: key);
+  const MyApp({super.key});
 
   @override
   Widget build(BuildContext context) {

example/lib/examples/dynamic_properties.dart

@@ -7,7 +7,7 @@ void main() async {
 }
 
 class App extends StatefulWidget {
-  const App({Key? key}) : super(key: key);
+  const App({super.key});
 
   @override
   State<App> createState() => _AppState();

example/lib/examples/dynamic_text.dart

@@ -7,7 +7,7 @@ void main() async {
 }
 
 class App extends StatefulWidget {
-  const App({Key? key}) : super(key: key);
+  const App({super.key});
 
   @override
   State<App> createState() => _AppState();

example/lib/examples/error_builder.dart

@@ -4,7 +4,7 @@ import 'package:lottie/lottie.dart';
 void main() => runApp(const MyApp());
 
 class MyApp extends StatelessWidget {
-  const MyApp({Key? key}) : super(key: key);
+  const MyApp({super.key});
 
   @override
   Widget build(BuildContext context) {

example/lib/examples/examples.dart

@@ -4,7 +4,7 @@ import 'package:lottie/lottie.dart';
 void main() => runApp(const MyApp());
 
 class MyApp extends StatelessWidget {
-  const MyApp({Key? key}) : super(key: key);
+  const MyApp({super.key});
 
   @override
   Widget build(BuildContext context) {

example/lib/examples/hide_after_complete.dart

@@ -6,7 +6,7 @@ void main() async {
 }
 
 class App extends StatefulWidget {
-  const App({Key? key}) : super(key: key);
+  const App({super.key});
 
   @override
   State<App> createState() => _AppState();

example/lib/examples/markers.dart

@@ -9,7 +9,7 @@ void main() async {
 }
 
 class App extends StatefulWidget {
-  const App({Key? key}) : super(key: key);
+  const App({super.key});
 
   @override
   State<App> createState() => _AppState();
@@ -48,7 +48,7 @@ class _AppState extends State<App> with TickerProviderStateMixin {
 class _LottieDetails extends StatefulWidget {
   final LottieComposition composition;
 
-  const _LottieDetails(this.composition, {Key? key}) : super(key: key);
+  const _LottieDetails(this.composition);
 
   @override
   _LottieDetailsState createState() => _LottieDetailsState();

example/lib/examples/repeat.dart

@@ -4,7 +4,7 @@ import 'package:lottie/lottie.dart';
 void main() => runApp(const MyApp());
 
 class MyApp extends StatefulWidget {
-  const MyApp({Key? key}) : super(key: key);
+  const MyApp({super.key});
 
   @override
   State<MyApp> createState() => _MyAppState();

example/lib/examples/run_once.dart

@@ -12,7 +12,7 @@ void main() async {
 }
 
 class App extends StatefulWidget {
-  const App({Key? key}) : super(key: key);
+  const App({super.key});
 
   @override
   State<App> createState() => _AppState();

example/lib/examples/save_frames.dart

@@ -10,7 +10,7 @@ import 'package:path_provider/path_provider.dart';
 void main() => runApp(const MyApp());
 
 class MyApp extends StatefulWidget {
-  const MyApp({Key? key}) : super(key: key);
+  const MyApp({super.key});
 
   @override
   State<MyApp> createState() => _MyAppState();

example/lib/examples/simple_dynamic_properties.dart

@@ -4,7 +4,7 @@ import 'package:lottie/lottie.dart';
 void main() => runApp(const MyApp());
 
 class MyApp extends StatelessWidget {
-  const MyApp({Key? key}) : super(key: key);
+  const MyApp({super.key});
 
   @override
   Widget build(BuildContext context) {

example/lib/main.dart

@@ -4,7 +4,7 @@ import 'package:lottie/lottie.dart';
 void main() => runApp(const MyApp());
 
 class MyApp extends StatelessWidget {
-  const MyApp({Key? key}) : super(key: key);
+  const MyApp({super.key});
 
   @override
   Widget build(BuildContext context) {

example/lib/main_app.dart

@@ -14,7 +14,7 @@ void main() {
 }
 
 class App extends StatelessWidget {
-  const App({Key? key}) : super(key: key);
+  const App({super.key});
 
   @override
   Widget build(BuildContext context) {
@@ -64,7 +64,7 @@ class App extends StatelessWidget {
 class _Item extends StatelessWidget {
   final Widget child;
 
-  const _Item({Key? key, required this.child}) : super(key: key);
+  const _Item({required this.child});
 
   @override
   Widget build(BuildContext context) {
@@ -89,7 +89,7 @@ class _Item extends StatelessWidget {
 class Detail extends StatefulWidget {
   final String assetName;
 
-  const Detail(this.assetName, {Key? key}) : super(key: key);
+  const Detail(this.assetName, {super.key});
 
   @override
   State<Detail> createState() => _DetailState();

example/lib/sizing_example.dart

@@ -13,7 +13,7 @@ void main() async {
 class App extends StatelessWidget {
   final LottieComposition composition;
 
-  const App({Key? key, required this.composition}) : super(key: key);
+  const App({super.key, required this.composition});
 
   @override
   Widget build(BuildContext context) {
@@ -103,8 +103,7 @@ class _Lottie extends StatefulWidget {
   final AlignmentGeometry? alignment;
 
   const _Lottie(this.composition,
-      {Key? key, this.width, this.height, this.fit, this.alignment})
-      : super(key: key);
+      {this.width, this.height, this.fit, this.alignment});
 
   @override
   __LottieState createState() => __LottieState();

example/lib/src/all_files.g.dart

@@ -43,18 +43,32 @@ final files = [
   'assets/Tests/Airbnb.zip',
   'assets/Tests/Airbnb400.zip',
   'assets/Tests/Airbnb800.zip',
+  'assets/Tests/AnimatedShadow.json',
+  'assets/Tests/BeyondBounds.json',
+  'assets/Tests/BoxPosition.json',
   'assets/Tests/CheckSwitch.json',
   'assets/Tests/DifferentPointsCount.json',
   'assets/Tests/DynamicGradient.json',
   'assets/Tests/DynamicText.json',
+  'assets/Tests/EditedColor.json',
   'assets/Tests/EllipseDirection.json',
+  'assets/Tests/EmbeddedFont.zip',
   'assets/Tests/EndFrame.json',
   'assets/Tests/Fill.json',
+  'assets/Tests/FillBlur.json',
   'assets/Tests/Font_Text_Justification_Translate_Scale_Rotation_Test.json',
   'assets/Tests/Frame.json',
+  'assets/Tests/Framerate.json',
   'assets/Tests/GradientFill.json',
+  'assets/Tests/GradientFillBlur.json',
+  'assets/Tests/GradientOneColor.json',
+  'assets/Tests/GradientOpacityInterpolation.json',
+  'assets/Tests/GradientStrokeBlur.json',
+  'assets/Tests/Heart.json',
+  'assets/Tests/InterpolateBetweenOpacityStops.json',
   'assets/Tests/InterpolatorLoopBack.json',
   'assets/Tests/KeyframeTypes.json',
+  'assets/Tests/LargeComposition.json',
   'assets/Tests/Laugh4.json',
   'assets/Tests/LoopPlayOnce.json',
   'assets/Tests/Marker.json',
@@ -65,39 +79,66 @@ final files = [
   'assets/Tests/MatteTimeStretchLine.json',
   'assets/Tests/MatteTimeStretchScan.json',
   'assets/Tests/MiterLimit.json',
+  'assets/Tests/Multiline.json',
+  'assets/Tests/OpacityStops.json',
   'assets/Tests/OverlapShapeWithOpacity.json',
   'assets/Tests/Parenting.json',
+  'assets/Tests/PrecompBlur.json',
+  'assets/Tests/PrecompBlurDecimapPrecompSize.json',
   'assets/Tests/Precomps.json',
   'assets/Tests/RGB.json',
   'assets/Tests/RGBMarker.json',
+  'assets/Tests/Rect1.json',
+  'assets/Tests/Rect3.json',
+  'assets/Tests/Rect4.json',
+  'assets/Tests/Rect5.json',
+  'assets/Tests/Rect6.json',
+  'assets/Tests/Rect7.json',
+  'assets/Tests/Rect8.json',
+  'assets/Tests/Rect9.json',
   'assets/Tests/Remap.json',
   'assets/Tests/Repeater.json',
+  'assets/Tests/ReversedStar.json',
+  'assets/Tests/RoundedCorners.json',
+  'assets/Tests/RoundedWithAlreadyRoundedCorners.json',
   'assets/Tests/Scale0.json',
   'assets/Tests/ShapeTypes.json',
   'assets/Tests/Shapes.json',
   'assets/Tests/Skew.json',
   'assets/Tests/SolidLayerTransform.json',
   'assets/Tests/SplitDimensions.json',
+  'assets/Tests/SplitPathTransform.json',
   'assets/Tests/Squares.json',
   'assets/Tests/StarSkew.json',
   'assets/Tests/StartEndFrame.json',
+  'assets/Tests/StaticShadow.json',
   'assets/Tests/Stroke.json',
+  'assets/Tests/StrokeBlur.json',
   'assets/Tests/TelegramAlphaCompat.json',
   'assets/Tests/Text.json',
   'assets/Tests/TextBaseline.json',
+  'assets/Tests/TextWithPsCenter.json',
+  'assets/Tests/TextWithPsLeft.json',
   'assets/Tests/Text_Justification_Translate_Scale_Rotation_Text.json',
+  'assets/Tests/TgsWithoutOpacity.json',
+  'assets/Tests/Thumb.json',
   'assets/Tests/TimeRemapAndStartOffset.json',
   'assets/Tests/TimeStretch.json',
+  'assets/Tests/TimeStretchAndStartOffset.json',
   'assets/Tests/TimeStretchMask.json',
   'assets/Tests/TimeStretchPrecomp.json',
+  'assets/Tests/TimeStretchPrecomp2.json',
   'assets/Tests/TrackMattes.json',
   'assets/Tests/TransformWithoutEndValues.json',
+  'assets/Tests/TrimPathWrapAround.json',
   'assets/Tests/TrimPaths.json',
   'assets/Tests/TrimPathsInsideAndOutsideGroup.json',
   'assets/Tests/WeAccept.json',
   'assets/Tests/WeAcceptInlineImage.json',
+  'assets/Tests/ZipInlineImage.zip',
   'assets/Tests/adrock.json',
   'assets/Tests/adrock_converted.json',
+  'assets/Tests/anim_jpg.zip',
   'assets/Tests/august_view_pulse.zip',
   'assets/Tests/bm.json',
   'assets/Tests/bm_converted.json',
@@ -105,8 +146,11 @@ final files = [
   'assets/Tests/catrim_converted.json',
   'assets/Tests/dalek.json',
   'assets/Tests/dalek_converted.json',
+  'assets/Tests/exported_with_flow.json',
   'assets/Tests/hd.json',
   'assets/Tests/map.zip',
+  'assets/Tests/rect2.json',
+  'assets/Tests/wile.json',
   'assets/TwitterHeartButton.json',
   'assets/battery_optimizations.json',
   'assets/bluetoothscanning.json',
@@ -221,6 +265,7 @@ final files = [
   'assets/lottiefiles/la_calavera.json',
   'assets/lottiefiles/landing_page.json',
   'assets/lottiefiles/lego_loader.json',
+  'assets/lottiefiles/lf20_fteywrno.json',
   'assets/lottiefiles/light.json',
   'assets/lottiefiles/lightsaber.json',
   'assets/lottiefiles/little_girl_jumping_-_loader.json',

example/lib/tests/airbnb.dart

@@ -6,7 +6,7 @@ void main() async {
 }
 
 class App extends StatelessWidget {
-  const App({Key? key}) : super(key: key);
+  const App({super.key});
 
   @override
   Widget build(BuildContext context) {

example/lib/tests/we_accept.dart

@@ -6,7 +6,7 @@ void main() async {
 }
 
 class App extends StatelessWidget {
-  const App({Key? key}) : super(key: key);
+  const App({super.key});
 
   @override
   Widget build(BuildContext context) {

example/macos/Flutter/GeneratedPluginRegistrant.swift

@@ -5,7 +5,7 @@
 import FlutterMacOS
 import Foundation
 
-import path_provider_macos
+import path_provider_foundation
 
 func RegisterGeneratedPlugins(registry: FlutterPluginRegistry) {
   PathProviderPlugin.register(with: registry.registrar(forPlugin: "PathProviderPlugin"))

example/macos/Podfile

@@ -1,4 +1,4 @@
-platform :osx, '10.11'
+platform :osx, '10.14'
 
 # CocoaPods analytics sends network stats synchronously affecting flutter build latency.
 ENV['COCOAPODS_DISABLE_STATS'] = 'true'

example/macos/Podfile.lock

@@ -1,22 +1,23 @@
 PODS:
   - FlutterMacOS (1.0.0)
-  - path_provider_macos (0.0.1):
+  - path_provider_foundation (0.0.1):
+    - Flutter
     - FlutterMacOS
 
 DEPENDENCIES:
   - FlutterMacOS (from `Flutter/ephemeral`)
-  - path_provider_macos (from `Flutter/ephemeral/.symlinks/plugins/path_provider_macos/macos`)
+  - path_provider_foundation (from `Flutter/ephemeral/.symlinks/plugins/path_provider_foundation/darwin`)
 
 EXTERNAL SOURCES:
   FlutterMacOS:
     :path: Flutter/ephemeral
-  path_provider_macos:
-    :path: Flutter/ephemeral/.symlinks/plugins/path_provider_macos/macos
+  path_provider_foundation:
+    :path: Flutter/ephemeral/.symlinks/plugins/path_provider_foundation/darwin
 
 SPEC CHECKSUMS:
-  FlutterMacOS: ae6af50a8ea7d6103d888583d46bd8328a7e9811
-  path_provider_macos: 3c0c3b4b0d4a76d2bf989a913c2de869c5641a19
+  FlutterMacOS: 8f6f14fa908a6fb3fba0cd85dbd81ec4b251fb24
+  path_provider_foundation: 29f094ae23ebbca9d3d0cec13889cd9060c0e943
 
-PODFILE CHECKSUM: 6eac6b3292e5142cfc23bdeb71848a40ec51c14c
+PODFILE CHECKSUM: 353c8bcc5d5b0994e508d035b5431cfe18c1dea7
 
-COCOAPODS: 1.11.3
+COCOAPODS: 1.12.1

example/macos/Runner.xcodeproj/project.pbxproj

@@ -3,7 +3,7 @@
 	archiveVersion = 1;
 	classes = {
 	};
-	objectVersion = 51;
+	objectVersion = 54;
 	objects = {
 
 /* Begin PBXAggregateTarget section */
@@ -203,7 +203,7 @@
 			isa = PBXProject;
 			attributes = {
 				LastSwiftUpdateCheck = 0920;
-				LastUpgradeCheck = 0930;
+				LastUpgradeCheck = 1430;
 				ORGANIZATIONNAME = "The Flutter Authors";
 				TargetAttributes = {
 					33CC10EC2044A3C60003C045 = {
@@ -256,6 +256,7 @@
 /* Begin PBXShellScriptBuildPhase section */
 		3399D490228B24CF009A79C7 /* ShellScript */ = {
 			isa = PBXShellScriptBuildPhase;
+			alwaysOutOfDate = 1;
 			buildActionMask = 2147483647;
 			files = (
 			);
@@ -320,11 +321,11 @@
 			);
 			inputPaths = (
 				"${PODS_ROOT}/Target Support Files/Pods-Runner/Pods-Runner-frameworks.sh",
-				"${BUILT_PRODUCTS_DIR}/path_provider_macos/path_provider_macos.framework",
+				"${BUILT_PRODUCTS_DIR}/path_provider_foundation/path_provider_foundation.framework",
 			);
 			name = "[CP] Embed Pods Frameworks";
 			outputPaths = (
-				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/path_provider_macos.framework",
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/path_provider_foundation.framework",
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/sh;
@@ -405,7 +406,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				MACOSX_DEPLOYMENT_TARGET = 10.11;
+				MACOSX_DEPLOYMENT_TARGET = 10.14;
 				MTL_ENABLE_DEBUG_INFO = NO;
 				SDKROOT = macosx;
 				SWIFT_COMPILATION_MODE = wholemodule;
@@ -488,7 +489,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				MACOSX_DEPLOYMENT_TARGET = 10.11;
+				MACOSX_DEPLOYMENT_TARGET = 10.14;
 				MTL_ENABLE_DEBUG_INFO = YES;
 				ONLY_ACTIVE_ARCH = YES;
 				SDKROOT = macosx;
@@ -535,7 +536,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				MACOSX_DEPLOYMENT_TARGET = 10.11;
+				MACOSX_DEPLOYMENT_TARGET = 10.14;
 				MTL_ENABLE_DEBUG_INFO = NO;
 				SDKROOT = macosx;
 				SWIFT_COMPILATION_MODE = wholemodule;

example/macos/Runner.xcodeproj/xcshareddata/xcschemes/Runner.xcscheme

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1000"
+   LastUpgradeVersion = "1430"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"

example/pubspec.lock

@@ -5,72 +5,82 @@ packages:
     dependency: transitive
     description:
       name: archive
-      url: "https://pub.dartlang.org"
+      sha256: "7e0d52067d05f2e0324268097ba723b71cb41ac8a6a2b24d1edf9c536b987b03"
+      url: "https://pub.dev"
     source: hosted
-    version: "3.3.2"
+    version: "3.4.6"
   async:
     dependency: transitive
     description:
       name: async
-      url: "https://pub.dartlang.org"
+      sha256: "947bfcf187f74dbc5e146c9eb9c0f10c9f8b30743e341481c1e2ed3ecc18c20c"
+      url: "https://pub.dev"
     source: hosted
-    version: "2.9.0"
+    version: "2.11.0"
   boolean_selector:
     dependency: transitive
     description:
       name: boolean_selector
-      url: "https://pub.dartlang.org"
+      sha256: "6cfb5af12253eaf2b368f07bacc5a80d1301a071c73360d746b7f2e32d762c66"
+      url: "https://pub.dev"
     source: hosted
-    version: "2.1.0"
+    version: "2.1.1"
   characters:
     dependency: transitive
     description:
       name: characters
-      url: "https://pub.dartlang.org"
+      sha256: "04a925763edad70e8443c99234dc3328f442e811f1d8fd1a72f1c8ad0f69a605"
+      url: "https://pub.dev"
     source: hosted
-    version: "1.2.1"
+    version: "1.3.0"
   clock:
     dependency: transitive
     description:
       name: clock
-      url: "https://pub.dartlang.org"
+      sha256: cb6d7f03e1de671e34607e909a7213e31d7752be4fb66a86d29fe1eb14bfb5cf
+      url: "https://pub.dev"
     source: hosted
     version: "1.1.1"
   collection:
     dependency: transitive
     description:
       name: collection
-      url: "https://pub.dartlang.org"
+      sha256: f092b211a4319e98e5ff58223576de6c2803db36221657b46c82574721240687
+      url: "https://pub.dev"
     source: hosted
-    version: "1.16.0"
+    version: "1.17.2"
+  convert:
+    dependency: transitive
+    description:
+      name: convert
+      sha256: "0f08b14755d163f6e2134cb58222dd25ea2a2ee8a195e53983d57c075324d592"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.1.1"
   crypto:
     dependency: transitive
     description:
       name: crypto
-      url: "https://pub.dartlang.org"
+      sha256: ff625774173754681d66daaf4a448684fb04b78f902da9cb3d308c19cc5e8bab
+      url: "https://pub.dev"
     source: hosted
-    version: "3.0.2"
+    version: "3.0.3"
   fake_async:
     dependency: transitive
     description:
       name: fake_async
-      url: "https://pub.dartlang.org"
+      sha256: "511392330127add0b769b75a987850d136345d9227c6b94c96a04cf4a391bf78"
+      url: "https://pub.dev"
     source: hosted
     version: "1.3.1"
   ffi:
     dependency: transitive
     description:
       name: ffi
-      url: "https://pub.dartlang.org"
+      sha256: "7bf0adc28a23d395f19f3f1eb21dd7cfd1dd9f8e1c50051c069122e6853bc878"
+      url: "https://pub.dev"
     source: hosted
-    version: "2.0.1"
-  file:
-    dependency: transitive
-    description:
-      name: file
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "6.1.4"
+    version: "2.1.0"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -80,16 +90,18 @@ packages:
     dependency: "direct main"
     description:
       name: flutter_colorpicker
-      url: "https://pub.dartlang.org"
+      sha256: "458a6ed8ea480eb16ff892aedb4b7092b2804affd7e046591fb03127e8d8ef8b"
+      url: "https://pub.dev"
     source: hosted
     version: "1.0.3"
   flutter_lints:
     dependency: "direct dev"
     description:
       name: flutter_lints
-      url: "https://pub.dartlang.org"
+      sha256: ad76540d21c066228ee3f9d1dad64a9f7e46530e8bb7c85011a88bc1fd874bc5
+      url: "https://pub.dev"
     source: hosted
-    version: "2.0.1"
+    version: "3.0.0"
   flutter_test:
     dependency: "direct dev"
     description: flutter
@@ -99,142 +111,161 @@ packages:
     dependency: "direct dev"
     description:
       name: golden_toolkit
-      url: "https://pub.dartlang.org"
+      sha256: "8f74adab33154fe7b731395782797021f97d2edc52f7bfb85ff4f1b5c4a215f0"
+      url: "https://pub.dev"
     source: hosted
-    version: "0.13.0"
+    version: "0.15.0"
   http:
     dependency: "direct main"
     description:
       name: http
-      url: "https://pub.dartlang.org"
+      sha256: "759d1a329847dd0f39226c688d3e06a6b8679668e350e2891a6474f8b4bb8525"
+      url: "https://pub.dev"
     source: hosted
-    version: "0.13.5"
+    version: "1.1.0"
   http_parser:
     dependency: transitive
     description:
       name: http_parser
-      url: "https://pub.dartlang.org"
+      sha256: "2aa08ce0341cc9b354a498388e30986515406668dbcc4f7c950c3e715496693b"
+      url: "https://pub.dev"
     source: hosted
     version: "4.0.2"
+  js:
+    dependency: transitive
+    description:
+      name: js
+      sha256: f2c445dce49627136094980615a031419f7f3eb393237e4ecd97ac15dea343f3
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.6.7"
   lints:
     dependency: transitive
     description:
       name: lints
-      url: "https://pub.dartlang.org"
+      sha256: cbf8d4b858bb0134ef3ef87841abdf8d63bfc255c266b7bf6b39daa1085c4290
+      url: "https://pub.dev"
     source: hosted
-    version: "2.0.1"
+    version: "3.0.0"
   logging:
     dependency: "direct main"
     description:
       name: logging
-      url: "https://pub.dartlang.org"
+      sha256: "623a88c9594aa774443aa3eb2d41807a48486b5613e67599fb4c41c0ad47c340"
+      url: "https://pub.dev"
     source: hosted
-    version: "1.1.0"
+    version: "1.2.0"
   lottie:
     dependency: "direct main"
     description:
       path: ".."
       relative: true
     source: path
-    version: "2.0.0"
+    version: "2.7.0"
   matcher:
     dependency: transitive
     description:
       name: matcher
-      url: "https://pub.dartlang.org"
+      sha256: "1803e76e6653768d64ed8ff2e1e67bea3ad4b923eb5c56a295c3e634bad5960e"
+      url: "https://pub.dev"
     source: hosted
-    version: "0.12.12"
+    version: "0.12.16"
   material_color_utilities:
     dependency: transitive
     description:
       name: material_color_utilities
-      url: "https://pub.dartlang.org"
+      sha256: "9528f2f296073ff54cb9fee677df673ace1218163c3bc7628093e7eed5203d41"
+      url: "https://pub.dev"
     source: hosted
-    version: "0.1.5"
+    version: "0.5.0"
   meta:
     dependency: transitive
     description:
       name: meta
-      url: "https://pub.dartlang.org"
+      sha256: "3c74dbf8763d36539f114c799d8a2d87343b5067e9d796ca22b5eb8437090ee3"
+      url: "https://pub.dev"
     source: hosted
-    version: "1.8.0"
+    version: "1.9.1"
   path:
     dependency: "direct main"
     description:
       name: path
-      url: "https://pub.dartlang.org"
+      sha256: "8829d8a55c13fc0e37127c29fedf290c102f4e40ae94ada574091fe0ff96c917"
+      url: "https://pub.dev"
     source: hosted
-    version: "1.8.2"
+    version: "1.8.3"
   path_provider:
     dependency: "direct main"
     description:
       name: path_provider
-      url: "https://pub.dartlang.org"
+      sha256: a1aa8aaa2542a6bc57e381f132af822420216c80d4781f7aa085ca3229208aaa
+      url: "https://pub.dev"
     source: hosted
-    version: "2.0.11"
+    version: "2.1.1"
   path_provider_android:
     dependency: transitive
     description:
       name: path_provider_android
-      url: "https://pub.dartlang.org"
+      sha256: "6b8b19bd80da4f11ce91b2d1fb931f3006911477cec227cce23d3253d80df3f1"
+      url: "https://pub.dev"
     source: hosted
-    version: "2.0.21"
-  path_provider_ios:
+    version: "2.2.0"
+  path_provider_foundation:
     dependency: transitive
     description:
-      name: path_provider_ios
-      url: "https://pub.dartlang.org"
+      name: path_provider_foundation
+      sha256: "19314d595120f82aca0ba62787d58dde2cc6b5df7d2f0daf72489e38d1b57f2d"
+      url: "https://pub.dev"
     source: hosted
-    version: "2.0.11"
+    version: "2.3.1"
   path_provider_linux:
     dependency: transitive
     description:
       name: path_provider_linux
-      url: "https://pub.dartlang.org"
+      sha256: f7a1fe3a634fe7734c8d3f2766ad746ae2a2884abe22e241a8b301bf5cac3279
+      url: "https://pub.dev"
     source: hosted
-    version: "2.1.7"
-  path_provider_macos:
-    dependency: transitive
-    description:
-      name: path_provider_macos
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.0.6"
+    version: "2.2.1"
   path_provider_platform_interface:
     dependency: transitive
     description:
       name: path_provider_platform_interface
-      url: "https://pub.dartlang.org"
+      sha256: "94b1e0dd80970c1ce43d5d4e050a9918fce4f4a775e6142424c30a29a363265c"
+      url: "https://pub.dev"
     source: hosted
-    version: "2.0.5"
+    version: "2.1.1"
   path_provider_windows:
     dependency: transitive
     description:
       name: path_provider_windows
-      url: "https://pub.dartlang.org"
+      sha256: "8bc9f22eee8690981c22aa7fc602f5c85b497a6fb2ceb35ee5a5e5ed85ad8170"
+      url: "https://pub.dev"
     source: hosted
-    version: "2.1.3"
+    version: "2.2.1"
   platform:
     dependency: transitive
     description:
       name: platform
-      url: "https://pub.dartlang.org"
+      sha256: "0a279f0707af40c890e80b1e9df8bb761694c074ba7e1d4ab1bc4b728e200b59"
+      url: "https://pub.dev"
     source: hosted
-    version: "3.1.0"
+    version: "3.1.3"
   plugin_platform_interface:
     dependency: transitive
     description:
       name: plugin_platform_interface
-      url: "https://pub.dartlang.org"
+      sha256: da3fdfeccc4d4ff2da8f8c556704c08f912542c5fb3cf2233ed75372384a034d
+      url: "https://pub.dev"
     source: hosted
-    version: "2.1.3"
-  process:
+    version: "2.1.6"
+  pointycastle:
     dependency: transitive
     description:
-      name: process
-      url: "https://pub.dartlang.org"
+      name: pointycastle
+      sha256: "7c1e5f0d23c9016c5bbd8b1473d0d3fb3fc851b876046039509e18e0c7485f2c"
+      url: "https://pub.dev"
     source: hosted
-    version: "4.2.4"
+    version: "3.7.3"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -244,72 +275,90 @@ packages:
     dependency: transitive
     description:
       name: source_span
-      url: "https://pub.dartlang.org"
+      sha256: "53e943d4206a5e30df338fd4c6e7a077e02254531b138a15aec3bd143c1a8b3c"
+      url: "https://pub.dev"
     source: hosted
-    version: "1.9.0"
+    version: "1.10.0"
   stack_trace:
     dependency: transitive
     description:
       name: stack_trace
-      url: "https://pub.dartlang.org"
+      sha256: c3c7d8edb15bee7f0f74debd4b9c5f3c2ea86766fe4178eb2a18eb30a0bdaed5
+      url: "https://pub.dev"
     source: hosted
-    version: "1.10.0"
+    version: "1.11.0"
   stream_channel:
     dependency: transitive
     description:
       name: stream_channel
-      url: "https://pub.dartlang.org"
+      sha256: "83615bee9045c1d322bbbd1ba209b7a749c2cbcdcb3fdd1df8eb488b3279c1c8"
+      url: "https://pub.dev"
     source: hosted
-    version: "2.1.0"
+    version: "2.1.1"
   string_scanner:
     dependency: transitive
     description:
       name: string_scanner
-      url: "https://pub.dartlang.org"
+      sha256: "556692adab6cfa87322a115640c11f13cb77b3f076ddcc5d6ae3c20242bedcde"
+      url: "https://pub.dev"
     source: hosted
-    version: "1.1.1"
+    version: "1.2.0"
   term_glyph:
     dependency: transitive
     description:
       name: term_glyph
-      url: "https://pub.dartlang.org"
+      sha256: a29248a84fbb7c79282b40b8c72a1209db169a2e0542bce341da992fe1bc7e84
+      url: "https://pub.dev"
     source: hosted
     version: "1.2.1"
   test_api:
     dependency: transitive
     description:
       name: test_api
-      url: "https://pub.dartlang.org"
+      sha256: "75760ffd7786fffdfb9597c35c5b27eaeec82be8edfb6d71d32651128ed7aab8"
+      url: "https://pub.dev"
     source: hosted
-    version: "0.4.12"
+    version: "0.6.0"
   typed_data:
     dependency: transitive
     description:
       name: typed_data
-      url: "https://pub.dartlang.org"
+      sha256: facc8d6582f16042dd49f2463ff1bd6e2c9ef9f3d5da3d9b087e244a7b564b3c
+      url: "https://pub.dev"
     source: hosted
-    version: "1.3.1"
+    version: "1.3.2"
   vector_math:
     dependency: transitive
     description:
       name: vector_math
-      url: "https://pub.dartlang.org"
+      sha256: "80b3257d1492ce4d091729e3a67a60407d227c27241d6927be0130c98e741803"
+      url: "https://pub.dev"
     source: hosted
-    version: "2.1.2"
+    version: "2.1.4"
+  web:
+    dependency: transitive
+    description:
+      name: web
+      sha256: dc8ccd225a2005c1be616fe02951e2e342092edf968cf0844220383757ef8f10
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.1.4-beta"
   win32:
     dependency: transitive
     description:
       name: win32
-      url: "https://pub.dartlang.org"
+      sha256: "350a11abd2d1d97e0cc7a28a81b781c08002aa2864d9e3f192ca0ffa18b06ed3"
+      url: "https://pub.dev"
     source: hosted
-    version: "3.0.1"
+    version: "5.0.9"
   xdg_directories:
     dependency: transitive
     description:
       name: xdg_directories
-      url: "https://pub.dartlang.org"
+      sha256: "589ada45ba9e39405c198fe34eb0f607cddb2108527e658136120892beac46d2"
+      url: "https://pub.dev"
     source: hosted
-    version: "0.2.0+2"
+    version: "1.0.3"
 sdks:
-  dart: ">=2.18.0 <3.0.0"
-  flutter: ">=3.3.0"
+  dart: ">=3.1.0 <4.0.0"
+  flutter: ">=3.13.0"

example/pubspec.yaml

@@ -3,7 +3,7 @@ description: A sample app for the Lottie player
 publish_to: none
 
 environment:
-  sdk: ">=2.18.0 <3.0.0"
+  sdk: "^3.0.0"
 
 dependencies:
   flutter:

lib/lottie.dart

@@ -10,7 +10,7 @@ export 'src/options.dart' show LottieOptions;
 export 'src/providers/asset_provider.dart' show AssetLottie;
 export 'src/providers/file_provider.dart' show FileLottie;
 export 'src/providers/load_image.dart' show LottieImageProviderFactory;
-export 'src/providers/lottie_provider.dart' show LottieProvider;
+export 'src/providers/lottie_provider.dart' show LottieCache, LottieProvider;
 export 'src/providers/memory_provider.dart' show MemoryLottie;
 export 'src/providers/network_provider.dart' show NetworkLottie;
 export 'src/raw_lottie.dart' show RawLottie;

lib/src/animation/content/base_stroke_content.dart

@@ -144,7 +144,7 @@ abstract class BaseStrokeContent
     }
     var alpha =
         ((parentAlpha / 255.0 * _opacityAnimation.value / 100.0) * 255).round();
-    paint.setAlpha(alpha.clamp(0, 255).toInt());
+    paint.setAlpha(alpha.clamp(0, 255));
     paint.strokeWidth = _widthAnimation.value * parentMatrix.getScale();
     if (paint.strokeWidth <= 0) {
       // Android draws a hairline stroke for 0, After Effects doesn't.

lib/src/animation/content/content_group.dart

@@ -52,18 +52,20 @@ class ContentGroup implements DrawingContent, PathContent, KeyPathElement {
   List<PathContent>? _pathContents;
   TransformKeyframeAnimation? _transformAnimation;
 
-  ContentGroup(final LottieDrawable lottieDrawable, BaseLayer layer,
-      ShapeGroup shapeGroup)
+  ContentGroup(
+      LottieDrawable lottieDrawable, BaseLayer layer, ShapeGroup shapeGroup)
       : this.copy(
             lottieDrawable,
             layer,
             shapeGroup.name,
-            shapeGroup.hidden,
             contentsFromModels(lottieDrawable, layer, shapeGroup.items),
-            findTransform(shapeGroup.items));
+            findTransform(shapeGroup.items),
+            hidden: shapeGroup.hidden);
 
   ContentGroup.copy(this._lottieDrawable, BaseLayer layer, this.name,
-      this._hidden, this._contents, AnimatableTransform? transform) {
+      this._contents, AnimatableTransform? transform,
+      {required bool hidden})
+      : _hidden = hidden {
     if (transform != null) {
       _transformAnimation = transform.createAnimation()
         ..addAnimationsToLayer(layer)

lib/src/animation/content/fill_content.dart

@@ -89,7 +89,7 @@ class FillContent implements DrawingContent, KeyPathElementContent {
     _paint.color = _colorAnimation.value;
     var alpha =
         ((parentAlpha / 255.0 * _opacityAnimation.value / 100.0) * 255).round();
-    _paint.setAlpha(alpha.clamp(0, 255).toInt());
+    _paint.setAlpha(alpha.clamp(0, 255));
     if (lottieDrawable.antiAliasingSuggested) {
       _paint.isAntiAlias = true;
     }

lib/src/animation/content/gradient_fill_content.dart

@@ -135,7 +135,7 @@ class GradientFillContent implements DrawingContent, KeyPathElementContent {
 
     var alpha =
         ((parentAlpha / 255.0 * _opacityAnimation.value / 100.0) * 255).round();
-    _paint.setAlpha(alpha.clamp(0, 255).toInt());
+    _paint.setAlpha(alpha.clamp(0, 255));
     if (lottieDrawable.antiAliasingSuggested) {
       _paint.isAntiAlias = true;
     }
@@ -175,8 +175,7 @@ class GradientFillContent implements DrawingContent, KeyPathElementContent {
     var gradientColor = _colorAnimation.value;
     var colors = _applyDynamicColorsIfNeeded(gradientColor.colors);
     var positions = gradientColor.positions;
-    gradient = Gradient.linear(
-        startPoint, endPoint, colors, positions, TileMode.clamp);
+    gradient = Gradient.linear(startPoint, endPoint, colors, positions);
     _linearGradientCache[gradientHash] = gradient;
     return gradient;
   }
@@ -200,8 +199,7 @@ class GradientFillContent implements DrawingContent, KeyPathElementContent {
     if (radius <= 0) {
       radius = 0.001;
     }
-    gradient =
-        Gradient.radial(startPoint, radius, colors, positions, TileMode.clamp);
+    gradient = Gradient.radial(startPoint, radius, colors, positions);
     _radialGradientCache[gradientHash] = gradient;
     return gradient;
   }

lib/src/animation/content/gradient_stroke_content.dart

@@ -31,8 +31,8 @@ class GradientStrokeContent extends BaseStrokeContent {
   ValueCallbackKeyframeAnimation<List<Color>, List<Color>>?
       _colorCallbackAnimation;
 
-  GradientStrokeContent(final LottieDrawable lottieDrawable, BaseLayer layer,
-      GradientStroke stroke)
+  GradientStrokeContent(
+      LottieDrawable lottieDrawable, BaseLayer layer, GradientStroke stroke)
       : name = stroke.name,
         _type = stroke.gradientType,
         _hidden = stroke.hidden,

lib/src/animation/content/merge_paths_content.dart

@@ -50,19 +50,14 @@ class MergePathsContent implements PathContent, GreedyContent {
     switch (_mergePaths.mode) {
       case MergePathsMode.merge:
         _addPaths();
-        break;
       case MergePathsMode.add:
         _opFirstPathWithRest(PathOperation.union);
-        break;
       case MergePathsMode.substract:
         _opFirstPathWithRest(PathOperation.reverseDifference);
-        break;
       case MergePathsMode.intersect:
         _opFirstPathWithRest(PathOperation.intersect);
-        break;
       case MergePathsMode.excludeIntersections:
         _opFirstPathWithRest(PathOperation.xor);
-        break;
     }
 
     return _path;

lib/src/animation/content/polystar_content.dart

@@ -108,10 +108,8 @@ class PolystarContent implements PathContent, KeyPathElementContent {
     switch (_polystarShape.type) {
       case PolystarShapeType.star:
         _createStarPath();
-        break;
       case PolystarShapeType.polygon:
         _createPolygonPath();
-        break;
     }
 
     _path.close();
@@ -253,7 +251,7 @@ class PolystarContent implements PathContent, KeyPathElementContent {
     _path.moveTo(x, y);
     currentAngle += anglePerPoint;
 
-    var numPoints = points.ceil().toDouble();
+    var numPoints = points.toDouble();
     for (var i = 0; i < numPoints; i++) {
       previousX = x;
       previousY = y;

lib/src/animation/content/repeater_content.dart

@@ -79,7 +79,8 @@ class RepeaterContent
     newContents = newContents.reversed.toList();
 
     _contentGroup = ContentGroup.copy(
-        lottieDrawable, layer, 'Repeater', _repeater.hidden, newContents, null);
+        lottieDrawable, layer, 'Repeater', newContents, null,
+        hidden: _repeater.hidden);
   }
 
   @override

lib/src/animation/content/rounded_corners_content.dart

@@ -6,6 +6,7 @@ import '../../model/content/shape_data.dart';
 import '../../model/cubic_curve_data.dart';
 import '../../model/layer/base_layer.dart';
 import '../../utils.dart';
+import '../../utils/misc.dart';
 import '../keyframe/base_keyframe_animation.dart';
 import 'content.dart';
 import 'shape_modifier_content.dart';
@@ -168,12 +169,12 @@ class RoundedCornersContent implements ShapeModifierContent {
         var previousCurveData = modifiedCurves[
             floorMod(modifiedCurvesIndex - 1, modifiedCurves.length)];
         var currentCurveData = modifiedCurves[modifiedCurvesIndex];
-        previousCurveData.controlPoint2 =
-            Offset(previousCurve.vertex.dx, previousCurve.vertex.dy);
+        previousCurveData.controlPoint2 = Offset(
+            previousCurve.controlPoint2.dx, previousCurve.controlPoint2.dy);
         previousCurveData.vertex =
             Offset(previousCurve.vertex.dx, previousCurve.vertex.dy);
-        currentCurveData.controlPoint1 =
-            Offset(startingCurve.vertex.dx, startingCurve.vertex.dy);
+        currentCurveData.controlPoint1 = Offset(
+            startingCurve.controlPoint1.dx, startingCurve.controlPoint1.dy);
         modifiedCurvesIndex++;
       }
     }
@@ -215,22 +216,9 @@ class RoundedCornersContent implements ShapeModifierContent {
       this.shapeData = shapeData =
           ShapeData(newCurves, initialPoint: Offset.zero, closed: false);
     }
-    shapeData.setClosed(isClosed);
+    shapeData.isClosed = isClosed;
     return shapeData;
   }
 
-  /// Copied from the API 24+ AOSP source.
-  static int floorMod(int x, int y) {
-    return x - floorDiv(x, y) * y;
-  }
-
-  /// Copied from the API 24+ AOSP source.
-  static int floorDiv(int x, int y) {
-    var r = x ~/ y;
-    // if the signs are different and modulo not zero, round down
-    if ((x ^ y) < 0 && (r * y != x)) {
-      r--;
-    }
-    return r;
-  }
+  static int floorMod(int x, int y) => MiscUtils.floorModInt(x, y);
 }

lib/src/animation/content/stroke_content.dart

@@ -17,7 +17,7 @@ class StrokeContent extends BaseStrokeContent {
   BaseKeyframeAnimation<ColorFilter, ColorFilter?>? _colorFilterAnimation;
 
   StrokeContent(
-      final LottieDrawable lottieDrawable, BaseLayer layer, ShapeStroke stroke)
+      LottieDrawable lottieDrawable, BaseLayer layer, ShapeStroke stroke)
       : name = stroke.name,
         _hidden = stroke.hidden,
         _colorAnimation = stroke.color.createAnimation(),

lib/src/animation/keyframe/color_keyframe_animation.dart

@@ -4,7 +4,7 @@ import '../../value/keyframe.dart';
 import 'keyframe_animation.dart';
 
 class ColorKeyframeAnimation extends KeyframeAnimation<Color> {
-  ColorKeyframeAnimation(List<Keyframe<Color>> keyframes) : super(keyframes);
+  ColorKeyframeAnimation(super.keyframes);
 
   @override
   Color getValue(Keyframe<Color> keyframe, double keyframeProgress) {

lib/src/animation/keyframe/double_keyframe_animation.dart

@@ -3,7 +3,7 @@ import '../../value/keyframe.dart';
 import 'keyframe_animation.dart';
 
 class DoubleKeyframeAnimation extends KeyframeAnimation<double> {
-  DoubleKeyframeAnimation(List<Keyframe<double>> keyframes) : super(keyframes);
+  DoubleKeyframeAnimation(super.keyframes);
 
   @override
   double getValue(Keyframe<double> keyframe, double keyframeProgress) {

lib/src/animation/keyframe/integer_keyframe_animation.dart

@@ -3,7 +3,7 @@ import '../../value/keyframe.dart';
 import 'keyframe_animation.dart';
 
 class IntegerKeyframeAnimation extends KeyframeAnimation<int> {
-  IntegerKeyframeAnimation(List<Keyframe<int>> keyframes) : super(keyframes);
+  IntegerKeyframeAnimation(super.keyframes);
 
   @override
   int getValue(Keyframe<int> keyframe, double keyframeProgress) {

lib/src/animation/keyframe/keyframe_animation.dart

@@ -1,7 +1,6 @@
-import '../../value/keyframe.dart';
 import 'base_keyframe_animation.dart';
 
 abstract class KeyframeAnimation<T extends Object>
     extends BaseKeyframeAnimation<T, T> {
-  KeyframeAnimation(List<Keyframe<T>> keyframes) : super(keyframes);
+  KeyframeAnimation(super.keyframes);
 }

lib/src/animation/keyframe/path_keyframe.dart

@@ -7,9 +7,9 @@ class PathKeyframe extends Keyframe<Offset> {
   Path? _path;
   final Keyframe<Offset> _pointKeyFrame;
 
-  PathKeyframe(LottieComposition composition, Keyframe<Offset> keyframe)
+  PathKeyframe(LottieComposition super.composition, Keyframe<Offset> keyframe)
       : _pointKeyFrame = keyframe,
-        super(composition,
+        super(
             startValue: keyframe.startValue,
             endValue: keyframe.endValue,
             interpolator: keyframe.interpolator,

lib/src/animation/keyframe/path_keyframe_animation.dart

@@ -7,7 +7,7 @@ class PathKeyframeAnimation extends KeyframeAnimation<Offset> {
   PathKeyframe? _pathMeasureKeyframe;
   late PathMetric _pathMeasure;
 
-  PathKeyframeAnimation(List<Keyframe<Offset>> keyframes) : super(keyframes);
+  PathKeyframeAnimation(super.keyframes);
 
   @override
   Offset getValue(Keyframe<Offset> keyframe, double keyframeProgress) {

lib/src/animation/keyframe/point_keyframe_animation.dart

@@ -3,7 +3,7 @@ import '../../value/keyframe.dart';
 import 'keyframe_animation.dart';
 
 class PointKeyframeAnimation extends KeyframeAnimation<Offset> {
-  PointKeyframeAnimation(List<Keyframe<Offset>> keyframes) : super(keyframes);
+  PointKeyframeAnimation(super.keyframes);
 
   @override
   Offset getValue(Keyframe<Offset> keyframe, double keyframeProgress) {

lib/src/animation/keyframe/shape_keyframe_animation.dart

@@ -11,8 +11,7 @@ class ShapeKeyframeAnimation extends BaseKeyframeAnimation<ShapeData, Path> {
   final Path _tempPath = PathFactory.create();
   List<ShapeModifierContent>? _shapeModifiers;
 
-  ShapeKeyframeAnimation(List<Keyframe<ShapeData>> keyframes)
-      : super(keyframes);
+  ShapeKeyframeAnimation(super.keyframes);
 
   @override
   Path getValue(Keyframe<ShapeData> keyframe, double keyframeProgress) {

lib/src/animation/keyframe/text_keyframe_animation.dart

@@ -5,8 +5,7 @@ import '../../value/lottie_value_callback.dart';
 import 'keyframe_animation.dart';
 
 class TextKeyframeAnimation extends KeyframeAnimation<DocumentData> {
-  TextKeyframeAnimation(List<Keyframe<DocumentData>> keyframes)
-      : super(keyframes);
+  TextKeyframeAnimation(super.keyframes);
 
   @override
   DocumentData getValue(
@@ -53,16 +52,19 @@ class _DocumentDataValueCallback extends LottieValueCallback<DocumentData> {
         ? frameInfo.endValue!
         : frameInfo.startValue!;
     return DocumentData(
-        text: text,
-        fontName: baseDocumentData.fontName,
-        size: baseDocumentData.size,
-        justification: baseDocumentData.justification,
-        tracking: baseDocumentData.tracking,
-        lineHeight: baseDocumentData.lineHeight,
-        baselineShift: baseDocumentData.baselineShift,
-        color: baseDocumentData.color,
-        strokeColor: baseDocumentData.strokeColor,
-        strokeWidth: baseDocumentData.strokeWidth,
-        strokeOverFill: baseDocumentData.strokeOverFill);
+      text: text,
+      fontName: baseDocumentData.fontName,
+      size: baseDocumentData.size,
+      justification: baseDocumentData.justification,
+      tracking: baseDocumentData.tracking,
+      lineHeight: baseDocumentData.lineHeight,
+      baselineShift: baseDocumentData.baselineShift,
+      color: baseDocumentData.color,
+      strokeColor: baseDocumentData.strokeColor,
+      strokeWidth: baseDocumentData.strokeWidth,
+      strokeOverFill: baseDocumentData.strokeOverFill,
+      boxPosition: baseDocumentData.boxPosition,
+      boxSize: baseDocumentData.boxSize,
+    );
   }
 }

lib/src/composition.dart

@@ -1,5 +1,6 @@
 import 'dart:math';
 import 'dart:typed_data';
+import 'dart:ui';
 import 'package:archive/archive.dart';
 import 'package:flutter/widgets.dart';
 import 'package:path/path.dart' as p;
@@ -41,7 +42,7 @@ class LottieComposition {
         name: name, imageProviderFactory: imageProviderFactory);
   }
 
-  static Future<LottieComposition> fromBytes(Uint8List bytes,
+  static Future<LottieComposition> fromBytes(List<int> bytes,
       {String? name, LottieImageProviderFactory? imageProviderFactory}) async {
     Archive? archive;
     if (bytes[0] == 0x50 && bytes[1] == 0x4B) {
@@ -73,6 +74,14 @@ class LottieComposition {
               composition, image, MemoryImage(found.content as Uint8List));
         }
       }
+
+      for (var font in archive.files.where((f) => f.name.endsWith('.ttf'))) {
+        var fileName = p.basenameWithoutExtension(font.name).toLowerCase();
+        var existingFont = composition.fonts.values
+            .firstWhereOrNull((f) => f.family.toLowerCase() == fileName);
+        await loadFontFromList(font.content as Uint8List,
+            fontFamily: existingFont?.family);
+      }
     }
 
     return composition;

lib/src/lottie.dart

@@ -4,6 +4,7 @@ import '../lottie.dart';
 import 'composition.dart';
 import 'l.dart';
 import 'lottie_builder.dart';
+import 'providers/lottie_provider.dart';
 
 /// A widget to display a loaded [LottieComposition].
 /// The [controller] property allows to specify a custom AnimationController that
@@ -11,8 +12,11 @@ import 'lottie_builder.dart';
 /// automatically and the behavior could be adjusted with the properties [animate],
 /// [repeat] and [reverse].
 class Lottie extends StatefulWidget {
+  /// The cache instance for recently loaded Lottie compositions.
+  static LottieCache get cache => sharedLottieCache;
+
   const Lottie({
-    Key? key,
+    super.key,
     required this.composition,
     this.controller,
     this.width,
@@ -30,8 +34,7 @@ class Lottie extends StatefulWidget {
   })  : animate = animate ?? true,
         reverse = reverse ?? false,
         repeat = repeat ?? true,
-        addRepaintBoundary = addRepaintBoundary ?? true,
-        super(key: key);
+        addRepaintBoundary = addRepaintBoundary ?? true;
 
   /// Creates a widget that displays an [LottieComposition] obtained from an [AssetBundle].
   static LottieBuilder asset(
@@ -299,6 +302,7 @@ class Lottie extends StatefulWidget {
 
   /// Some options to enable/disable some feature of Lottie
   /// - enableMergePaths: Enable merge path support
+  /// - enableApplyingOpacityToLayers: Enable layer-level opacity
   final LottieOptions? options;
 
   /// Indicate to automatically add a `RepaintBoundary` widget around the animation.

lib/src/lottie_builder.dart

@@ -41,7 +41,7 @@ typedef LottieErrorWidgetBuilder = Widget Function(
 ///
 class LottieBuilder extends StatefulWidget {
   const LottieBuilder({
-    Key? key,
+    super.key,
     required this.lottie,
     this.controller,
     this.frameRate,
@@ -60,7 +60,7 @@ class LottieBuilder extends StatefulWidget {
     this.addRepaintBoundary,
     this.filterQuality,
     this.onWarning,
-  }) : super(key: key);
+  });
 
   /// Creates a widget that displays an [LottieComposition] obtained from the network.
   LottieBuilder.network(
@@ -75,7 +75,7 @@ class LottieBuilder extends StatefulWidget {
     this.options,
     LottieImageProviderFactory? imageProviderFactory,
     this.onLoaded,
-    Key? key,
+    super.key,
     this.frameBuilder,
     this.errorBuilder,
     this.width,
@@ -85,9 +85,8 @@ class LottieBuilder extends StatefulWidget {
     this.addRepaintBoundary,
     this.filterQuality,
     this.onWarning,
-  })  : lottie = NetworkLottie(src,
-            headers: headers, imageProviderFactory: imageProviderFactory),
-        super(key: key);
+  }) : lottie = NetworkLottie(src,
+            headers: headers, imageProviderFactory: imageProviderFactory);
 
   /// Creates a widget that displays an [LottieComposition] obtained from a [File].
   ///
@@ -110,7 +109,7 @@ class LottieBuilder extends StatefulWidget {
     this.options,
     LottieImageProviderFactory? imageProviderFactory,
     this.onLoaded,
-    Key? key,
+    super.key,
     this.frameBuilder,
     this.errorBuilder,
     this.width,
@@ -120,8 +119,7 @@ class LottieBuilder extends StatefulWidget {
     this.addRepaintBoundary,
     this.filterQuality,
     this.onWarning,
-  })  : lottie = FileLottie(file, imageProviderFactory: imageProviderFactory),
-        super(key: key);
+  }) : lottie = FileLottie(file, imageProviderFactory: imageProviderFactory);
 
   /// Creates a widget that displays an [LottieComposition] obtained from an [AssetBundle].
   LottieBuilder.asset(
@@ -135,7 +133,7 @@ class LottieBuilder extends StatefulWidget {
     this.options,
     LottieImageProviderFactory? imageProviderFactory,
     this.onLoaded,
-    Key? key,
+    super.key,
     AssetBundle? bundle,
     this.frameBuilder,
     this.errorBuilder,
@@ -147,11 +145,10 @@ class LottieBuilder extends StatefulWidget {
     this.addRepaintBoundary,
     this.filterQuality,
     this.onWarning,
-  })  : lottie = AssetLottie(name,
+  }) : lottie = AssetLottie(name,
             bundle: bundle,
             package: package,
-            imageProviderFactory: imageProviderFactory),
-        super(key: key);
+            imageProviderFactory: imageProviderFactory);
 
   /// Creates a widget that displays an [LottieComposition] obtained from a [Uint8List].
   LottieBuilder.memory(
@@ -166,7 +163,7 @@ class LottieBuilder extends StatefulWidget {
     LottieImageProviderFactory? imageProviderFactory,
     this.onLoaded,
     this.errorBuilder,
-    Key? key,
+    super.key,
     this.frameBuilder,
     this.width,
     this.height,
@@ -175,9 +172,7 @@ class LottieBuilder extends StatefulWidget {
     this.addRepaintBoundary,
     this.filterQuality,
     this.onWarning,
-  })  : lottie =
-            MemoryLottie(bytes, imageProviderFactory: imageProviderFactory),
-        super(key: key);
+  }) : lottie = MemoryLottie(bytes, imageProviderFactory: imageProviderFactory);
 
   /// The lottie animation to load.
   /// Example of providers: [AssetLottie], [NetworkLottie], [FileLottie], [MemoryLottie]
@@ -224,6 +219,7 @@ class LottieBuilder extends StatefulWidget {
 
   /// Some options to enable/disable some feature of Lottie
   /// - enableMergePaths: Enable merge path support
+  /// - enableApplyingOpacityToLayers: Enable layer-level opacity
   final LottieOptions? options;
 
   /// A builder function responsible for creating the widget that represents
@@ -446,17 +442,22 @@ class _LottieBuilderState extends State<LottieBuilder> {
   void _load() {
     var provider = widget.lottie;
     _loadingFuture = widget.lottie.load().then((composition) {
-      if (mounted && widget.lottie == provider) {
-        var onWarning = widget.onWarning;
-        composition.onWarning = onWarning;
-        if (onWarning != null) {
-          for (var warning in composition.warnings) {
-            onWarning(warning);
+      // LottieProvier.load() can return a Synchronous future and the onLoaded
+      // callback can call setState, so we wrap it in a microtask to avoid an
+      // "!_isDirty" error.
+      scheduleMicrotask(() {
+        if (mounted && widget.lottie == provider) {
+          var onWarning = widget.onWarning;
+          composition.onWarning = onWarning;
+          if (onWarning != null) {
+            for (var warning in composition.warnings) {
+              onWarning(warning);
+            }
           }
-        }
 
-        widget.onLoaded?.call(composition);
-      }
+          widget.onLoaded?.call(composition);
+        }
+      });
 
       return composition;
     });
@@ -477,12 +478,14 @@ class _LottieBuilderState extends State<LottieBuilder> {
         }
 
         var composition = snapshot.data;
+        var animate = widget.animate;
+        animate ??= (composition?.durationFrames ?? 0) > 1.0;
 
         Widget result = Lottie(
           composition: composition,
           controller: widget.controller,
           frameRate: widget.frameRate,
-          animate: widget.animate,
+          animate: animate,
           reverse: widget.reverse,
           repeat: widget.repeat,
           delegates: widget.delegates,

lib/src/lottie_delegates.dart

@@ -5,9 +5,22 @@ import 'lottie_drawable.dart';
 import 'lottie_image_asset.dart';
 import 'value_delegate.dart';
 
-// TODO(xha): recognize style Bold, Medium, Regular, SemiBold, etc...
-TextStyle defaultTextStyleDelegate(LottieFontStyle font) =>
-    TextStyle(fontFamily: font.fontFamily);
+TextStyle defaultTextStyleDelegate(LottieFontStyle font) {
+  var style = font.style.toLowerCase();
+
+  var fontStyle = style.contains('italic') ? FontStyle.italic : null;
+
+  FontWeight? fontWeight;
+  if (style.contains('semibold') || style.contains('semi bold')) {
+    fontWeight = FontWeight.w600;
+  } else if (style.contains('bold')) {
+    fontWeight = FontWeight.bold;
+  }
+  return TextStyle(
+      fontFamily: font.fontFamily,
+      fontStyle: fontStyle,
+      fontWeight: fontWeight);
+}
 
 @immutable
 class LottieDelegates {

lib/src/model/animatable/animatable_color_value.dart

@@ -1,11 +1,9 @@
 import 'dart:ui';
 import '../../animation/keyframe/color_keyframe_animation.dart';
-import '../../value/keyframe.dart';
 import 'base_animatable_value.dart';
 
 class AnimatableColorValue extends BaseAnimatableValue<Color, Color> {
-  AnimatableColorValue.fromKeyframes(List<Keyframe<Color>> keyframes)
-      : super.fromKeyframes(keyframes);
+  AnimatableColorValue.fromKeyframes(super.keyframes) : super.fromKeyframes();
 
   @override
   ColorKeyframeAnimation createAnimation() {

lib/src/model/animatable/animatable_double_value.dart

@@ -1,12 +1,10 @@
 import '../../animation/keyframe/double_keyframe_animation.dart';
-import '../../value/keyframe.dart';
 import 'base_animatable_value.dart';
 
 class AnimatableDoubleValue extends BaseAnimatableValue<double, double> {
   AnimatableDoubleValue() : super.fromValue(0.0);
 
-  AnimatableDoubleValue.fromKeyframes(List<Keyframe<double>> keyframes)
-      : super.fromKeyframes(keyframes);
+  AnimatableDoubleValue.fromKeyframes(super.keyframes) : super.fromKeyframes();
 
   @override
   DoubleKeyframeAnimation createAnimation() {

lib/src/model/animatable/animatable_gradient_color_value.dart

@@ -7,7 +7,51 @@ class AnimatableGradientColorValue
     extends BaseAnimatableValue<GradientColor, GradientColor> {
   AnimatableGradientColorValue.fromKeyframes(
       List<Keyframe<GradientColor>> keyframes)
-      : super.fromKeyframes(keyframes);
+      : super.fromKeyframes(_ensureInterpolatableKeyframes(keyframes));
+
+  static List<Keyframe<GradientColor>> _ensureInterpolatableKeyframes(
+      List<Keyframe<GradientColor>> keyframes) {
+    for (var i = 0; i < keyframes.length; i++) {
+      keyframes[i] = _ensureInterpolatableKeyframe(keyframes[i]);
+    }
+    return keyframes;
+  }
+
+  static Keyframe<GradientColor> _ensureInterpolatableKeyframe(
+      Keyframe<GradientColor> keyframe) {
+    var startValue = keyframe.startValue;
+    var endValue = keyframe.endValue;
+    if (startValue == null ||
+        endValue == null ||
+        startValue.positions.length == endValue.positions.length) {
+      return keyframe;
+    }
+    var mergedPositions =
+        _mergePositions(startValue.positions, endValue.positions);
+    // The start/end has opacity stops which required adding extra positions in between the existing colors.
+    return keyframe.copyWith(startValue.copyWithPositions(mergedPositions),
+        endValue.copyWithPositions(mergedPositions));
+  }
+
+  static List<double> _mergePositions(
+      List<double> startPositions, List<double> endPositions) {
+    var mergedArray =
+        List<double>.filled(startPositions.length + endPositions.length, 0);
+    mergedArray.setRange(0, startPositions.length, startPositions);
+    mergedArray.setRange(startPositions.length,
+        startPositions.length + endPositions.length, endPositions);
+    mergedArray.sort();
+    var uniqueValues = 0;
+    var lastValue = double.nan;
+    for (var i = 0; i < mergedArray.length; i++) {
+      if (mergedArray[i] != lastValue) {
+        mergedArray[uniqueValues] = mergedArray[i];
+        uniqueValues++;
+        lastValue = mergedArray[i];
+      }
+    }
+    return mergedArray.take(uniqueValues).toList();
+  }
 
   @override
   GradientColorKeyframeAnimation createAnimation() {

lib/src/model/animatable/animatable_integer_value.dart

@@ -1,13 +1,11 @@
 import '../../animation/keyframe/base_keyframe_animation.dart';
 import '../../animation/keyframe/integer_keyframe_animation.dart';
-import '../../value/keyframe.dart';
 import 'base_animatable_value.dart';
 
 class AnimatableIntegerValue extends BaseAnimatableValue<int, int> {
   AnimatableIntegerValue() : super.fromValue(100);
 
-  AnimatableIntegerValue.fromKeyframes(List<Keyframe<int>> keyframes)
-      : super.fromKeyframes(keyframes);
+  AnimatableIntegerValue.fromKeyframes(super.keyframes) : super.fromKeyframes();
 
   @override
   BaseKeyframeAnimation<int, int> createAnimation() {

lib/src/model/animatable/animatable_point_value.dart

@@ -1,11 +1,9 @@
 import 'dart:ui';
 import '../../animation/keyframe/point_keyframe_animation.dart';
-import '../../value/keyframe.dart';
 import 'base_animatable_value.dart';
 
 class AnimatablePointValue extends BaseAnimatableValue<Offset, Offset> {
-  AnimatablePointValue.fromKeyframes(List<Keyframe<Offset>> keyframes)
-      : super.fromKeyframes(keyframes);
+  AnimatablePointValue.fromKeyframes(super.keyframes) : super.fromKeyframes();
 
   @override
   PointKeyframeAnimation createAnimation() {

lib/src/model/animatable/animatable_scale_value.dart

@@ -1,16 +1,14 @@
 import 'dart:ui';
 import '../../animation/keyframe/base_keyframe_animation.dart';
 import '../../animation/keyframe/point_keyframe_animation.dart';
-import '../../value/keyframe.dart';
 import 'base_animatable_value.dart';
 
 class AnimatableScaleValue extends BaseAnimatableValue<Offset, Offset> {
   AnimatableScaleValue.one() : this(const Offset(1, 1));
 
-  AnimatableScaleValue(Offset value) : super.fromValue(value);
+  AnimatableScaleValue(super.value) : super.fromValue();
 
-  AnimatableScaleValue.fromKeyframes(List<Keyframe<Offset>> keyframes)
-      : super.fromKeyframes(keyframes);
+  AnimatableScaleValue.fromKeyframes(super.keyframes) : super.fromKeyframes();
 
   @override
   BaseKeyframeAnimation<Offset, Offset> createAnimation() {

lib/src/model/animatable/animatable_shape_value.dart

@@ -1,12 +1,10 @@
 import 'dart:ui';
 import '../../animation/keyframe/shape_keyframe_animation.dart';
-import '../../value/keyframe.dart';
 import '../content/shape_data.dart';
 import 'base_animatable_value.dart';
 
 class AnimatableShapeValue extends BaseAnimatableValue<ShapeData, Path> {
-  AnimatableShapeValue.fromKeyframes(List<Keyframe<ShapeData>> keyframes)
-      : super.fromKeyframes(keyframes);
+  AnimatableShapeValue.fromKeyframes(super.keyframes) : super.fromKeyframes();
 
   @override
   ShapeKeyframeAnimation createAnimation() {