docker

And allow to use an imageProviderFactory with a zip file.

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

@@ -6,11 +6,11 @@ on:
       - master
 
 jobs:
-  analyze_and_test:
+  analyze:
     name: Flutter analyze
     strategy:
       matrix:
-        flutter: ['beta']
+        flutter: ['stable', 'beta']
     runs-on: macos-latest
     steps:
       - uses: actions/checkout@v2
@@ -22,9 +22,6 @@ jobs:
       - run: flutter pub get
         working-directory: example
       - run: flutter analyze
-      - run: flutter test test # https://github.com/flutter/flutter/issues/20907
-      - run: flutter test test
-        working-directory: example
       - run: flutter pub run tool/prepare_submit.dart
       - name: "check for uncommitted changes"
         run: |
@@ -33,3 +30,26 @@ jobs:
                    "and check in all changes" \
               && exit 1)
         shell: bash
+  test:
+    name: Run all tests
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Run tests
+        uses: docker://cirrusci/flutter:2.0.6
+        with:
+          args: sh run_tests.sh
+  build_web_version:
+    name: Check that the web version compile
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: subosito/flutter-action@v1
+        with:
+          channel: 'beta'
+      - run: flutter config --enable-web
+      - run: flutter precache web
+      - run: flutter pub get
+        working-directory: example
+      - run: flutter build web
+        working-directory: example

CHANGELOG.md

@@ -1,6 +1,11 @@
-## [0.8.0]
+## [1.0.1]
+- Implement `RenderBox.computeDryLayout`
+
+## [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]
 - Fix a crash for some lottie file with empty paths.

CONTRIBUTING.md

@@ -0,0 +1,7 @@
+
+## Run the Golden tests
+Run and update the golden tests requires Docker installed.
+
+```shell script
+sh update_goldens.sh
+```

README.md

@@ -6,7 +6,7 @@
 Lottie is a mobile library for Android and iOS that parses [Adobe After Effects](https://www.adobe.com/products/aftereffects.html) 
 animations exported as json with [Bodymovin](https://github.com/airbnb/lottie-web) and renders them natively on mobile!
 
-This repository is a unofficial conversion of the [Lottie-android](https://github.com/airbnb/lottie-android) library in pure Dart. 
+This repository is an unofficial conversion of the [Lottie-android](https://github.com/airbnb/lottie-android) library in pure Dart. 
 
 It works on Android, iOS, macOS, linux, windows and web.
 
@@ -246,13 +246,12 @@ class _Animation extends StatelessWidget {
 ````
 
 ## Limitations
-Only the [supported features of Lottie Android](https://airbnb.io/lottie/#/supported-features)
-are supported in this port.
+This port supports the same [feature set as Lottie Android](https://airbnb.io/lottie/#/supported-features).
 
 ## Flutter Web
-Run the app with `flutter run -d Chrome --dart-define=FLUTTER_WEB_USE_SKIA=true --release`
+Run the app with `flutter run -d chrome --web-renderer canvaskit`
 
-See a preview here: https://xvrh.github.io/lottie-flutter/index.html
+See a preview here: https://xvrh.github.io/lottie-flutter-web/
 
 ## More examples
 See the `example` folder for more code samples of the various possibilities.

README.template.md

@@ -6,7 +6,7 @@
 Lottie is a mobile library for Android and iOS that parses [Adobe After Effects](https://www.adobe.com/products/aftereffects.html) 
 animations exported as json with [Bodymovin](https://github.com/airbnb/lottie-web) and renders them natively on mobile!
 
-This repository is a unofficial conversion of the [Lottie-android](https://github.com/airbnb/lottie-android) library in pure Dart. 
+This repository is an unofficial conversion of the [Lottie-android](https://github.com/airbnb/lottie-android) library in pure Dart. 
 
 It works on Android, iOS, macOS, linux, windows and web.
 
@@ -78,13 +78,12 @@ import 'example/lib/examples/simple_dynamic_properties.dart#example';
 ````
 
 ## Limitations
-Only the [supported features of Lottie Android](https://airbnb.io/lottie/#/supported-features)
-are supported in this port.
+This port supports the same [feature set as Lottie Android](https://airbnb.io/lottie/#/supported-features).
 
 ## Flutter Web
-Run the app with `flutter run -d Chrome --dart-define=FLUTTER_WEB_USE_SKIA=true --release`
+Run the app with `flutter run -d chrome --web-renderer canvaskit`
 
-See a preview here: https://xvrh.github.io/lottie-flutter/index.html
+See a preview here: https://xvrh.github.io/lottie-flutter-web/
 
 ## More examples
 See the `example` folder for more code samples of the various possibilities.

analysis_options.yaml

@@ -1,16 +1,17 @@
 include: package:pedantic/analysis_options.yaml
 analyzer:
-  errors:
   strong-mode:
     implicit-casts: false
     implicit-dynamic: false
 linter:
   rules:
+    avoid_dynamic_calls: true
     avoid_renaming_method_parameters: true
     avoid_returning_null_for_future: true
     avoid_returning_null_for_void: true
     avoid_returning_this: true
     avoid_setters_without_getters: true
+    avoid_web_libraries_in_flutter: true
     await_only_futures: true
     camel_case_types: true
     cancel_subscriptions: true
@@ -26,6 +27,7 @@ linter:
     overridden_fields: true
     prefer_inlined_adds: true
     prefer_interpolation_to_compose_strings: true
+    prefer_null_aware_method_calls: true
     prefer_null_aware_operators: true
     prefer_relative_imports: true
     prefer_typing_uninitialized_variables: true
@@ -33,7 +35,9 @@ linter:
     test_types_in_equals: true
     unnecessary_brace_in_string_interps: true
     unnecessary_getters_setters: true
+    unnecessary_null_checks: true
     unnecessary_parenthesis: true
     unnecessary_statements: true
     use_function_type_syntax_for_parameters: true
+    use_if_null_to_convert_nulls_to_bools: true
     void_checks: true

example/lib/examples/animation_full_control.dart

@@ -87,7 +87,6 @@ class _MyAppState extends State<MyApp> with TickerProviderStateMixin {
             ),
             const SizedBox(height: 30),
             ElevatedButton(
-              child: Text('Loop between frames'),
               onPressed: () {
                 // Loop between 2 specifics frames
 
@@ -100,6 +99,7 @@ class _MyAppState extends State<MyApp> with TickerProviderStateMixin {
                   period: _controller.duration! * (stop - start),
                 );
               },
+              child: Text('Loop between frames'),
             ),
           ],
         ),

example/lib/examples/markers.dart

@@ -88,16 +88,16 @@ class _LottieDetailsState extends State<_LottieDetails>
           trailing: Text(widget.composition.durationFrames.toStringAsFixed(1)),
         ),
         ElevatedButton(
-          child: Text('touchDownEnd - touchUpCancel'),
           onPressed: () => _playBetween('touchDownEnd', 'touchUpCancel'),
+          child: Text('touchDownEnd - touchUpCancel'),
         ),
         ElevatedButton(
-          child: Text('touchDownStart - touchDownEnd'),
           onPressed: () => _playBetween('touchDownStart', 'touchDownEnd'),
+          child: Text('touchDownStart - touchDownEnd'),
         ),
         ElevatedButton(
-          child: Text('touchDownEnd - touchUpEnd'),
           onPressed: () => _playBetween('touchDownEnd', 'touchUpEnd'),
+          child: Text('touchDownEnd - touchUpEnd'),
         ),
         for (var marker in widget.composition.markers)
           ListTile(

example/lib/examples/save_frames.dart

@@ -29,8 +29,8 @@ class _MyAppState extends State<MyApp> {
             crossAxisAlignment: CrossAxisAlignment.stretch,
             children: [
               ElevatedButton(
-                child: Text('Export all frames'),
                 onPressed: _export,
+                child: Text('Export all frames'),
               ),
               if (_frames != null)
                 Expanded(

example/lib/main_app.dart

@@ -29,25 +29,25 @@ class App extends StatelessWidget {
             itemBuilder: (context, index) {
               var assetName = files[index];
               return GestureDetector(
-                child: _Item(
-                  child: Lottie.asset(
-                    assetName,
-                    frameBuilder: (context, child, composition) {
-                      return AnimatedOpacity(
-                        child: child,
-                        opacity: composition == null ? 0 : 1,
-                        duration: const Duration(seconds: 1),
-                        curve: Curves.easeOut,
-                      );
-                    },
-                  ),
-                ),
                 onTap: () {
                   Navigator.push(
                       context,
                       MaterialPageRoute<void>(
                           builder: (context) => Detail(assetName)));
                 },
+                child: _Item(
+                  child: Lottie.asset(
+                    assetName,
+                    frameBuilder: (context, child, composition) {
+                      return AnimatedOpacity(
+                        opacity: composition == null ? 0 : 1,
+                        duration: const Duration(seconds: 1),
+                        curve: Curves.easeOut,
+                        child: child,
+                      );
+                    },
+                  ),
+                ),
               );
             },
           ),

example/lib/src/all_files.g.dart

@@ -108,14 +108,17 @@ final files = [
   'assets/Tests/hd.json',
   'assets/Tests/map.zip',
   'assets/TwitterHeartButton.json',
-  'assets/_loading_indicator.json',
+  'assets/battery_optimizations.json',
   'assets/bluetoothscanning.json',
+  'assets/camera_change.json',
+  'assets/envelope.json',
   'assets/example_with_images/data.json',
   'assets/lf20_w2Afea.json',
   'assets/lottiefiles/100_percent.json',
+  'assets/lottiefiles/28861-connection-style-2.json',
+  'assets/lottiefiles/45668-arrow-with-light-passing-through.json',
   'assets/lottiefiles/Plane.json',
   'assets/lottiefiles/StreetByMorning.json',
-  'assets/lottiefiles/___.json',
   'assets/lottiefiles/a_mountain.json',
   'assets/lottiefiles/accept_arrows.json',
   'assets/lottiefiles/airbnb.json',
@@ -346,7 +349,9 @@ final files = [
   'assets/lottiefiles/yoga_carpet.json',
   'assets/lottiefiles/youtube_icon_reveal.json',
   'assets/playing.json',
-  'assets/weather/_hurricane.json',
+  'assets/spinning_carrousel.zip',
+  'assets/sticker.json',
+  'assets/tent.json',
   'assets/weather/fog.json',
   'assets/weather/hurricane.json',
   'assets/weather/thunder-storm.json',

example/pubspec.lock

@@ -7,77 +7,77 @@ packages:
       name: archive
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.0.0-nullsafety.0"
+    version: "3.1.2"
   async:
     dependency: transitive
     description:
       name: async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.5.0-nullsafety.3"
+    version: "2.5.0"
   boolean_selector:
     dependency: transitive
     description:
       name: boolean_selector
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0-nullsafety.3"
+    version: "2.1.0"
   characters:
     dependency: transitive
     description:
       name: characters
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0-nullsafety.5"
+    version: "1.1.0"
   charcode:
     dependency: transitive
     description:
       name: charcode
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0-nullsafety.3"
+    version: "1.2.0"
   clock:
     dependency: transitive
     description:
       name: clock
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0-nullsafety.3"
+    version: "1.1.0"
   collection:
     dependency: transitive
     description:
       name: collection
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.15.0-nullsafety.5"
+    version: "1.15.0"
   crypto:
     dependency: transitive
     description:
       name: crypto
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.0.0-nullsafety.0"
+    version: "3.0.1"
   fake_async:
     dependency: transitive
     description:
       name: fake_async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0-nullsafety.3"
+    version: "1.2.0"
   ffi:
     dependency: transitive
     description:
       name: ffi
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.1.3"
+    version: "1.0.0"
   file:
     dependency: transitive
     description:
       name: file
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "5.2.1"
+    version: "6.1.0"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -89,138 +89,124 @@ packages:
       name: flutter_colorpicker
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.4.0-nullsafety.0"
+    version: "0.4.0"
   flutter_test:
     dependency: "direct dev"
     description: flutter
     source: sdk
     version: "0.0.0"
-  golden_toolkit:
-    dependency: "direct dev"
-    description:
-      name: golden_toolkit
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.9.0-nullsafety.0"
   http:
     dependency: "direct main"
     description:
       name: http
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.12.2"
+    version: "0.13.3"
   http_parser:
     dependency: transitive
     description:
       name: http_parser
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.1.4"
-  intl:
-    dependency: transitive
-    description:
-      name: intl
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.16.1"
+    version: "4.0.0"
   logging:
     dependency: transitive
     description:
       name: logging
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.0"
+    version: "1.0.1"
   lottie:
     dependency: "direct main"
     description:
       path: ".."
       relative: true
     source: path
-    version: "0.8.0-nullsafety.2"
+    version: "1.0.1"
   matcher:
     dependency: transitive
     description:
       name: matcher
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.12.10-nullsafety.3"
+    version: "0.12.10"
   meta:
     dependency: transitive
     description:
       name: meta
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.0-nullsafety.6"
+    version: "1.3.0"
   path:
     dependency: transitive
     description:
       name: path
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.8.0-nullsafety.3"
+    version: "1.8.0"
   path_provider:
     dependency: "direct main"
     description:
       name: path_provider
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.6.27"
+    version: "2.0.1"
   path_provider_linux:
     dependency: transitive
     description:
       name: path_provider_linux
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.0.1+2"
+    version: "2.0.0"
   path_provider_macos:
     dependency: transitive
     description:
       name: path_provider_macos
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.0.4+8"
+    version: "2.0.0"
   path_provider_platform_interface:
     dependency: transitive
     description:
       name: path_provider_platform_interface
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.4"
+    version: "2.0.1"
   path_provider_windows:
     dependency: transitive
     description:
       name: path_provider_windows
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.0.4+3"
+    version: "2.0.1"
   pedantic:
     dependency: transitive
     description:
       name: pedantic
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.9.2"
+    version: "1.11.0"
   platform:
     dependency: transitive
     description:
       name: platform
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.2.1"
+    version: "3.0.0"
   plugin_platform_interface:
     dependency: transitive
     description:
       name: plugin_platform_interface
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.3"
+    version: "2.0.0"
   process:
     dependency: transitive
     description:
       name: process
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.0.13"
+    version: "4.2.1"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -232,70 +218,70 @@ packages:
       name: source_span
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.8.0-nullsafety.4"
+    version: "1.8.1"
   stack_trace:
     dependency: transitive
     description:
       name: stack_trace
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.10.0-nullsafety.6"
+    version: "1.10.0"
   stream_channel:
     dependency: transitive
     description:
       name: stream_channel
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0-nullsafety.3"
+    version: "2.1.0"
   string_scanner:
     dependency: transitive
     description:
       name: string_scanner
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0-nullsafety.3"
+    version: "1.1.0"
   term_glyph:
     dependency: transitive
     description:
       name: term_glyph
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0-nullsafety.3"
+    version: "1.2.0"
   test_api:
     dependency: transitive
     description:
       name: test_api
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.2.19-nullsafety.6"
+    version: "0.3.0"
   typed_data:
     dependency: transitive
     description:
       name: typed_data
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.0-nullsafety.5"
+    version: "1.3.0"
   vector_math:
     dependency: transitive
     description:
       name: vector_math
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0-nullsafety.5"
+    version: "2.1.0"
   win32:
     dependency: transitive
     description:
       name: win32
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.7.4"
+    version: "2.0.5"
   xdg_directories:
     dependency: transitive
     description:
       name: xdg_directories
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.1.2"
+    version: "0.2.0"
 sdks:
-  dart: ">=2.12.0-29.10.beta <3.0.0"
-  flutter: ">=1.24.0-10.2.pre"
+  dart: ">=2.12.0 <3.0.0"
+  flutter: ">=1.20.0"

example/pubspec.yaml

@@ -8,7 +8,7 @@ environment:
 dependencies:
   flutter:
     sdk: flutter
-  flutter_colorpicker: ^0.4.0-nullsafety.0
+  flutter_colorpicker:
   http:
   lottie:
     path: ../
@@ -17,7 +17,6 @@ dependencies:
 dev_dependencies:
   flutter_test:
     sdk: flutter
-  golden_toolkit: ^0.9.0-nullsafety.0
 
 # For information on the generic Dart part of this file, see the
 # following page: https://dart.dev/tools/pub/pubspec
@@ -60,4 +59,4 @@ flutter:
         - asset: assets/fonts/Roboto.ttf
     - family: Noto Emoji
       fonts:
-        - asset: assets/fonts/NotoEmoji-Regular.ttf
+        - asset: assets/fonts/Noto-Emoji.ttf

example/test/flutter_test_config.dart

@@ -1,7 +0,0 @@
-import 'dart:async';
-import 'package:golden_toolkit/golden_toolkit.dart';
-
-Future<void> testExecutable(FutureOr<void> Function() testMain) async {
-  await loadAppFonts();
-  return testMain();
-}

example/tool/generate_file_list.dart

@@ -1,4 +1,5 @@
 import 'dart:io';
+import 'package:path/path.dart' as p;
 
 void main() {
   var buffer = StringBuffer();
@@ -8,7 +9,9 @@ void main() {
   var allFiles = Directory('assets')
       .listSync(recursive: true)
       .whereType<File>()
-      .where((f) => f.path.endsWith('.json') || f.path.endsWith('.zip'))
+      .where((f) =>
+          (f.path.endsWith('.json') || f.path.endsWith('.zip')) &&
+          !p.basename(f.path).startsWith('_'))
       .toList();
   allFiles.sort((a, b) => a.path.compareTo(b.path));
   for (var file in allFiles) {

lib/lottie.dart

@@ -9,6 +9,7 @@ export 'src/model/marker.dart' show Marker;
 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/memory_provider.dart' show MemoryLottie;
 export 'src/providers/network_provider.dart' show NetworkLottie;

lib/src/animation/content/base_stroke_content.dart

@@ -241,8 +241,7 @@ abstract class BaseStrokeContent
     var bounds = _path.getBounds();
 
     var width = _widthAnimation.value;
-    bounds = Rect.fromLTRB(bounds.left - width / 2.0, bounds.top - width / 2.0,
-        bounds.right + width / 2.0, bounds.bottom + width / 2.0);
+    bounds = bounds.inflate(width / 2.0);
     // Add padding to account for rounding errors.
     bounds = bounds.inflate(1);
     L.endSection('StrokeContent#getBounds');

lib/src/animation/content/gradient_fill_content.dart

@@ -198,7 +198,7 @@ class GradientFillContent implements DrawingContent, KeyPathElementContent {
           colors[i] = dynamicColors[i];
         }
       } else {
-        colors = List.filled(dynamicColors.length, Color(0));
+        colors = List.filled(dynamicColors.length, Color(0x00000000));
         for (var i = 0; i < dynamicColors.length; i++) {
           colors[i] = dynamicColors[i];
         }

lib/src/animation/content/gradient_stroke_content.dart

@@ -149,7 +149,7 @@ class GradientStrokeContent extends BaseStrokeContent {
           colors[i] = dynamicColors[i];
         }
       } else {
-        colors = List<Color>.filled(dynamicColors.length, Color(0));
+        colors = List<Color>.filled(dynamicColors.length, Color(0x00000000));
         for (var i = 0; i < dynamicColors.length; i++) {
           colors[i] = dynamicColors[i];
         }

lib/src/animation/keyframe/gradient_color_keyframe_animation.dart

@@ -10,8 +10,8 @@ class GradientColorKeyframeAnimation extends KeyframeAnimation<GradientColor> {
       : super(keyframes) {
     var startValue = keyframes.first.startValue;
     var size = startValue == null ? 0 : startValue.size;
-    _gradientColor = GradientColor(
-        List<double>.filled(size, 0.0), List<Color>.filled(size, Color(0)));
+    _gradientColor = GradientColor(List<double>.filled(size, 0.0),
+        List<Color>.filled(size, Color(0x00000000)));
   }
 
   @override

lib/src/composition.dart

@@ -34,12 +34,14 @@ class CompositionParameters {
 }
 
 class LottieComposition {
-  static Future<LottieComposition> fromByteData(ByteData data, {String? name}) {
-    return fromBytes(data.buffer.asUint8List(), name: name);
+  static Future<LottieComposition> fromByteData(ByteData data,
+      {String? name, LottieImageProviderFactory? imageProviderFactory}) {
+    return fromBytes(data.buffer.asUint8List(),
+        name: name, imageProviderFactory: imageProviderFactory);
   }
 
   static Future<LottieComposition> fromBytes(Uint8List bytes,
-      {String? name}) async {
+      {String? name, LottieImageProviderFactory? imageProviderFactory}) async {
     Archive? archive;
     if (bytes[0] == 0x50 && bytes[1] == 0x4B) {
       archive = ZipDecoder().decodeBytes(bytes);
@@ -55,8 +57,18 @@ class LottieComposition {
         var imagePath = p.posix.join(image.dirName, image.fileName);
         var found = archive.files.firstWhereOrNull(
             (f) => f.name.toLowerCase() == imagePath.toLowerCase());
+
+        ImageProvider? provider;
+        if (imageProviderFactory != null) {
+          provider = imageProviderFactory(image);
+        }
+
+        if (provider != null) {
+          image.loadedImage = await loadImage(composition, image, provider);
+        }
+
         if (found != null) {
-          image.loadedImage = await loadImage(
+          image.loadedImage ??= await loadImage(
               composition, image, MemoryImage(found.content as Uint8List));
         }
       }

lib/src/lottie_delegates.dart

@@ -1,4 +1,6 @@
+import 'dart:ui' as ui;
 import 'package:flutter/widgets.dart';
+import '../lottie.dart';
 import 'lottie_drawable.dart';
 import 'value_delegate.dart';
 
@@ -43,12 +45,31 @@ class LottieDelegates {
   /// ```
   final List<ValueDelegate>? values;
 
-  //TODO(xha): imageDelegate to change the image to display?
+  /// A callback to dynamically change an image of the animation.
+  ///
+  /// Example:
+  /// ```dart
+  /// Lottie.asset(
+  //   'assets/data.json',
+  //   delegates: LottieDelegates(
+  //     image: (composition, image) {
+  //       if (image.id == 'img_0' && _isMouseOver) {
+  //         return myCustomImage;
+  //       }
+  //
+  //       // Use the default method: composition.images[image.id].loadedImage;
+  //       return null;
+  //     },
+  //   )
+  // )
+  /// ```
+  final ui.Image? Function(LottieComposition, LottieImageAsset)? image;
 
   LottieDelegates({
     this.text,
     TextStyle Function(LottieFontStyle)? textStyle,
     this.values,
+    this.image,
   }) : textStyle = textStyle;
 
   @override

lib/src/lottie_drawable.dart

@@ -79,7 +79,13 @@ class LottieDrawable {
   ui.Image? getImageAsset(String? ref) {
     var imageAsset = composition.images[ref];
     if (imageAsset != null) {
-      return imageAsset.loadedImage;
+      var imageDelegate = delegates?.image;
+      ui.Image? image;
+      if (imageDelegate != null) {
+        image = imageDelegate(composition, imageAsset);
+      }
+
+      return image ?? imageAsset.loadedImage;
     } else {
       return null;
     }

lib/src/lottie_property.dart

@@ -51,8 +51,8 @@ import 'dart:ui';
 ///    {@link #TIME_REMAP} (composition layers only)
 abstract class LottieProperty {
   /// ColorInt **/
-  static final Color color = Color(1);
-  static final Color strokeColor = Color(2);
+  static final Color color = Color(0x00000001);
+  static final Color strokeColor = Color(0x00000002);
 
   /// Opacity value are 0-100 to match after effects **/
   static final int transformOpacity = 3;

lib/src/model/layer/base_layer.dart

@@ -261,10 +261,7 @@ abstract class BaseLayer implements DrawingContent, KeyPathElement {
   void _clearCanvas(Canvas canvas, Rect bounds) {
     L.beginSection('Layer#clearLayer');
     // If we don't pad the clear draw, some phones leave a 1px border of the graphics buffer.
-    canvas.drawRect(
-        Rect.fromLTRB(bounds.left - 1, bounds.top - 1, bounds.right + 1,
-            bounds.bottom + 1),
-        _clearPaint);
+    canvas.drawRect(bounds.inflate(1), _clearPaint);
     L.endSection('Layer#clearLayer');
   }
 

lib/src/model/layer/text_layer.dart

@@ -425,7 +425,7 @@ class TextLayer extends BaseLayer {
         _colorCallbackAnimation = null;
       } else {
         _colorCallbackAnimation = ValueCallbackKeyframeAnimation(
-            callback as LottieValueCallback<Color>, const Color(0))
+            callback as LottieValueCallback<Color>, const Color(0x00000000))
           ..addUpdateListener(invalidateSelf);
         addAnimation(_colorCallbackAnimation);
       }
@@ -438,7 +438,7 @@ class TextLayer extends BaseLayer {
         _strokeColorCallbackAnimation = null;
       } else {
         _strokeColorCallbackAnimation = ValueCallbackKeyframeAnimation(
-            callback as LottieValueCallback<Color>, const Color(0))
+            callback as LottieValueCallback<Color>, const Color(0x00000000))
           ..addUpdateListener(invalidateSelf);
         addAnimation(_strokeColorCallbackAnimation);
       }

lib/src/parser/document_data_parser.dart

@@ -14,8 +14,8 @@ DocumentData documentDataParser(JsonReader reader, {required double scale}) {
   var tracking = 0;
   var lineHeight = 0.0;
   var baselineShift = 0.0;
-  var fillColor = Color(0);
-  var strokeColor = Color(0);
+  var fillColor = Color(0x00000000);
+  var strokeColor = Color(0x00000000);
   var strokeWidth = 0.0;
   var strokeOverFill = true;
 

lib/src/parser/gradient_color_parser.dart

@@ -45,7 +45,7 @@ class GradientColorParser {
     }
 
     var positions = List<double>.filled(_colorPoints, 0.0);
-    var colors = List<Color>.filled(_colorPoints, Color(0));
+    var colors = List<Color>.filled(_colorPoints, Color(0x00000000));
 
     var r = 0;
     var g = 0;

lib/src/parser/layer_parser.dart

@@ -59,7 +59,7 @@ class LayerParser {
         transform: AnimatableTransform(),
         solidWidth: 0,
         solidHeight: 0,
-        solidColor: Color(0),
+        solidColor: Color(0x00000000),
         timeStretch: 0,
         startFrame: 0,
         preCompWidth: bounds.width,
@@ -85,7 +85,7 @@ class LayerParser {
     var layerId = 0;
     var solidWidth = 0;
     var solidHeight = 0;
-    var solidColor = Color(0);
+    var solidColor = Color(0x00000000);
     var preCompWidth = 0;
     var preCompHeight = 0;
     var parentId = -1;

lib/src/parser/lottie_composition_parser.dart

@@ -101,14 +101,13 @@ class LottieCompositionParser {
       }
       layers.add(layer);
       layerMap[layer.id] = layer;
-
+    }
     if (imageCount > 4) {
       composition.addWarning(
           'You have $imageCount images. Lottie should primarily be '
           'used with shapes. If you are using Adobe Illustrator, convert the Illustrator layers'
           ' to shape layers.');
     }
-    }
     reader.endArray();
   }
 

lib/src/providers/asset_provider.dart

@@ -33,7 +33,8 @@ class AssetLottie extends LottieProvider {
       var data = await chosenBundle.load(keyName);
 
       var composition = await LottieComposition.fromByteData(data,
-          name: p.url.basenameWithoutExtension(keyName));
+          name: p.url.basenameWithoutExtension(keyName),
+          imageProviderFactory: imageProviderFactory);
 
       for (var image in composition.images.values) {
         image.loadedImage ??= await _loadImage(composition, image);

lib/src/providers/file_provider.dart

@@ -18,7 +18,8 @@ class FileLottie extends LottieProvider {
     return sharedLottieCache.putIfAbsent(cacheKey, () async {
       var bytes = await io.loadFile(file);
       var composition = await LottieComposition.fromBytes(bytes,
-          name: p.basenameWithoutExtension(io.filePath(file)));
+          name: p.basenameWithoutExtension(io.filePath(file)),
+          imageProviderFactory: imageProviderFactory);
 
       for (var image in composition.images.values) {
         image.loadedImage ??= await _loadImage(composition, image);

lib/src/providers/load_image.dart

@@ -4,7 +4,7 @@ import 'package:flutter/widgets.dart';
 import '../composition.dart';
 import '../lottie_image_asset.dart';
 
-typedef LottieImageProviderFactory = ImageProvider Function(LottieImageAsset);
+typedef LottieImageProviderFactory = ImageProvider? Function(LottieImageAsset);
 
 Future<ui.Image?> loadImage(LottieComposition composition,
     LottieImageAsset lottieImage, ImageProvider provider) {

lib/src/providers/memory_provider.dart

@@ -18,7 +18,8 @@ class MemoryLottie extends LottieProvider {
     // TODO(xha): hash the list content
     var cacheKey = 'memory-${bytes.hashCode}-${bytes.lengthInBytes}';
     return sharedLottieCache.putIfAbsent(cacheKey, () async {
-      var composition = await LottieComposition.fromBytes(bytes);
+      var composition = await LottieComposition.fromBytes(bytes,
+          imageProviderFactory: imageProviderFactory);
       for (var image in composition.images.values) {
         image.loadedImage ??= await _loadImage(composition, image);
       }

lib/src/providers/network_provider.dart

@@ -24,7 +24,8 @@ class NetworkLottie extends LottieProvider {
       var bytes = await network.loadHttp(resolved, headers: headers);
 
       var composition = await LottieComposition.fromBytes(bytes,
-          name: p.url.basenameWithoutExtension(url));
+          name: p.url.basenameWithoutExtension(url),
+          imageProviderFactory: imageProviderFactory);
 
       for (var image in composition.images.values) {
         image.loadedImage ??= await _loadImage(resolved, composition, image);

lib/src/providers/provider_web.dart

@@ -1,3 +1,5 @@
+// This file is using conditional import so it is safe to import dart:html
+// ignore: avoid_web_libraries_in_flutter
 import 'dart:html';
 import 'dart:typed_data';
 import 'package:flutter/rendering.dart';
@@ -30,6 +32,6 @@ String filePath(Object file) {
   return (file as File).relativePath ?? '';
 }
 
-ImageProvider? loadImageForFile(Object file, LottieImageAsset lottieImage) {
-  return null;
+ImageProvider loadImageForFile(Object file, LottieImageAsset lottieImage) {
+  throw UnimplementedError();
 }

lib/src/render_lottie.dart

@@ -185,6 +185,11 @@ class RenderLottie extends RenderBox {
   @override
   bool hitTestSelf(Offset position) => true;
 
+  @override
+  Size computeDryLayout(BoxConstraints constraints) {
+    return _sizeForConstraints(constraints);
+  }
+
   @override
   void performLayout() {
     size = _sizeForConstraints(constraints);

pubspec.lock

@@ -7,189 +7,189 @@ packages:
       name: _fe_analyzer_shared
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "14.0.0"
+    version: "21.0.0"
   analyzer:
     dependency: "direct dev"
     description:
       name: analyzer
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.41.2"
+    version: "1.5.0"
   archive:
     dependency: "direct main"
     description:
       name: archive
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.0.0-nullsafety.0"
+    version: "3.1.2"
   args:
     dependency: transitive
     description:
       name: args
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.6.0"
+    version: "2.1.0"
   async:
     dependency: transitive
     description:
       name: async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.5.0-nullsafety.3"
+    version: "2.5.0"
   boolean_selector:
     dependency: transitive
     description:
       name: boolean_selector
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0-nullsafety.3"
+    version: "2.1.0"
   build:
     dependency: transitive
     description:
       name: build
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.6.2"
+    version: "2.0.1"
   build_config:
     dependency: transitive
     description:
       name: build_config
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.4.5"
+    version: "1.0.0"
   build_daemon:
     dependency: transitive
     description:
       name: build_daemon
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.7"
+    version: "3.0.0"
   build_resolvers:
     dependency: transitive
     description:
       name: build_resolvers
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.5.3"
+    version: "2.0.1"
   build_runner:
     dependency: "direct dev"
     description:
       name: build_runner
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.11.1"
+    version: "2.0.2"
   build_runner_core:
     dependency: transitive
     description:
       name: build_runner_core
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "6.1.7"
+    version: "7.0.0"
   built_collection:
     dependency: transitive
     description:
       name: built_collection
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "4.3.2"
+    version: "5.0.0"
   built_value:
     dependency: transitive
     description:
       name: built_value
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "7.1.0"
+    version: "8.0.5"
   characters:
     dependency: "direct main"
     description:
       name: characters
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0-nullsafety.5"
+    version: "1.1.0"
   charcode:
     dependency: "direct main"
     description:
       name: charcode
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0-nullsafety.3"
+    version: "1.2.0"
   checked_yaml:
     dependency: transitive
     description:
       name: checked_yaml
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.4"
+    version: "2.0.1"
   cli_util:
     dependency: transitive
     description:
       name: cli_util
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.2.0"
+    version: "0.3.0"
   clock:
     dependency: transitive
     description:
       name: clock
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0-nullsafety.3"
+    version: "1.1.0"
   code_builder:
     dependency: transitive
     description:
       name: code_builder
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.6.0"
+    version: "4.0.0"
   collection:
     dependency: "direct main"
     description:
       name: collection
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.15.0-nullsafety.5"
+    version: "1.15.0"
   convert:
     dependency: transitive
     description:
       name: convert
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.1"
+    version: "3.0.0"
   crypto:
     dependency: transitive
     description:
       name: crypto
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.0.0-nullsafety.0"
+    version: "3.0.1"
   dart_style:
     dependency: "direct dev"
     description:
       name: dart_style
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.11"
+    version: "2.0.1"
   fake_async:
     dependency: transitive
     description:
       name: fake_async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0-nullsafety.3"
+    version: "1.2.0"
   file:
     dependency: transitive
     description:
       name: file
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "5.2.1"
+    version: "6.1.0"
   fixnum:
     dependency: transitive
     description:
       name: fixnum
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.10.11"
+    version: "1.0.0"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -200,48 +200,48 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  frontend_server_client:
+    dependency: transitive
+    description:
+      name: frontend_server_client
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.0"
   glob:
     dependency: transitive
     description:
       name: glob
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0"
+    version: "2.0.1"
   graphs:
     dependency: transitive
     description:
       name: graphs
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.2.0"
+    version: "2.0.0"
   http_multi_server:
     dependency: transitive
     description:
       name: http_multi_server
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.2.0"
+    version: "3.0.1"
   http_parser:
     dependency: transitive
     description:
       name: http_parser
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.1.4"
-  intl:
-    dependency: transitive
-    description:
-      name: intl
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.16.1"
+    version: "4.0.0"
   io:
     dependency: transitive
     description:
       name: io
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.3.4"
+    version: "1.0.0"
   js:
     dependency: transitive
     description:
@@ -255,28 +255,28 @@ packages:
       name: json_annotation
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.1.1"
+    version: "4.0.1"
   logging:
     dependency: "direct main"
     description:
       name: logging
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.0"
+    version: "1.0.1"
   matcher:
     dependency: transitive
     description:
       name: matcher
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.12.10-nullsafety.3"
+    version: "0.12.10"
   meta:
     dependency: "direct main"
     description:
       name: meta
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.0-nullsafety.6"
+    version: "1.3.0"
   mime:
     dependency: transitive
     description:
@@ -290,84 +290,63 @@ packages:
       name: mockito
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "5.0.0-nullsafety.7"
-  node_interop:
-    dependency: transitive
-    description:
-      name: node_interop
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.2.1"
-  node_io:
-    dependency: transitive
-    description:
-      name: node_io
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.2.0"
+    version: "5.0.7"
   package_config:
     dependency: transitive
     description:
       name: package_config
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.9.3"
+    version: "2.0.0"
   path:
     dependency: "direct main"
     description:
       name: path
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.8.0-nullsafety.3"
+    version: "1.8.0"
   pedantic:
     dependency: transitive
     description:
       name: pedantic
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.10.0"
+    version: "1.11.0"
   pool:
     dependency: transitive
     description:
       name: pool
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.4.0"
+    version: "1.5.0"
   pub_semver:
-    dependency: transitive
+    dependency: "direct dev"
     description:
       name: pub_semver
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.4.4"
+    version: "2.0.0"
   pubspec_parse:
     dependency: transitive
     description:
       name: pubspec_parse
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.1.7"
-  quiver:
-    dependency: transitive
-    description:
-      name: quiver
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.1.5"
+    version: "1.0.0"
   shelf:
     dependency: transitive
     description:
       name: shelf
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.7.9"
+    version: "1.1.1"
   shelf_web_socket:
     dependency: transitive
     description:
       name: shelf_web_socket
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.2.4"
+    version: "1.0.1"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -379,97 +358,97 @@ packages:
       name: source_gen
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.9.10+1"
+    version: "1.0.0"
   source_span:
     dependency: transitive
     description:
       name: source_span
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.8.0-nullsafety.4"
+    version: "1.8.0"
   stack_trace:
     dependency: transitive
     description:
       name: stack_trace
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.10.0-nullsafety.6"
+    version: "1.10.0"
   stream_channel:
     dependency: transitive
     description:
       name: stream_channel
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0-nullsafety.3"
+    version: "2.1.0"
   stream_transform:
     dependency: transitive
     description:
       name: stream_transform
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0"
+    version: "2.0.0"
   string_scanner:
     dependency: transitive
     description:
       name: string_scanner
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0-nullsafety.3"
+    version: "1.1.0"
   term_glyph:
     dependency: transitive
     description:
       name: term_glyph
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0-nullsafety.3"
+    version: "1.2.0"
   test_api:
     dependency: transitive
     description:
       name: test_api
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.2.19-nullsafety.6"
+    version: "0.2.19"
   timing:
     dependency: transitive
     description:
       name: timing
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.1.1+3"
+    version: "1.0.0"
   typed_data:
     dependency: transitive
     description:
       name: typed_data
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.0-nullsafety.5"
+    version: "1.3.0"
   vector_math:
     dependency: "direct main"
     description:
       name: vector_math
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0-nullsafety.5"
+    version: "2.1.0"
   watcher:
     dependency: transitive
     description:
       name: watcher
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.9.7+15"
+    version: "1.0.0"
   web_socket_channel:
     dependency: transitive
     description:
       name: web_socket_channel
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0"
+    version: "2.1.0"
   yaml:
     dependency: "direct dev"
     description:
       name: yaml
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.0.0-nullsafety.0"
+    version: "3.1.0"
 sdks:
-  dart: ">=2.12.0-0.0 <3.0.0"
+  dart: ">=2.12.0 <3.0.0"

pubspec.yaml

@@ -1,22 +1,22 @@
 name: lottie
 description: Render After Effects animations natively on Flutter. This package is a pure Dart implementation of a Lottie player.
-version: 0.8.0-nullsafety.2
+version: 1.0.2
 homepage: https://github.com/xvrh/lottie-flutter
 
 environment:
   sdk: '>=2.12.0-0 <3.0.0'
 
 dependencies:
-  archive: ^3.0.0-nullsafety.0
-  characters: ^1.1.0-nullsafety.5
-  charcode: ^1.2.0-nullsafety.3
-  collection: ^1.15.0-nullsafety.5
+  archive: ^3.0.0
+  characters: ^1.1.0
+  charcode: ^1.2.0
+  collection: ^1.15.0
   flutter:
     sdk: flutter
   logging: ^1.0.0
-  meta: ^1.3.0-nullsafety.6
-  path: ^1.8.0-nullsafety.3
-  vector_math: ^2.1.0-nullsafety.5
+  meta: ^1.3.0
+  path: ^1.8.0
+  vector_math: ^2.1.0
 
 dev_dependencies:
   analyzer:
@@ -24,5 +24,6 @@ dev_dependencies:
   dart_style:
   flutter_test:
     sdk: flutter
-  mockito: ^5.0.0-nullsafety.7
-  yaml: ^3.0.0-nullsafety.0
+  mockito:
+  pub_semver:
+  yaml:

run_tests.sh

@@ -0,0 +1,2 @@
+flutter test test
+(cd example && flutter test test)

test/dynamic_image_test.dart

@@ -0,0 +1,74 @@
+import 'dart:async';
+import 'dart:io';
+import 'dart:ui' as ui;
+import 'package:flutter/widgets.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:lottie/lottie.dart';
+import 'utils.dart';
+
+void main() {
+  testWidgets('Can specify ImageProvider with zip file ', (tester) async {
+    var size = Size(500, 400);
+    tester.binding.window.physicalSizeTestValue = size;
+    tester.binding.window.devicePixelRatioTestValue = 1.0;
+
+    var callCount = 0;
+    LottieImageProviderFactory imageProviderFactory = (image) {
+      ++callCount;
+      return FileImage(File('example/assets/Images/WeAccept/img_0.png'));
+    };
+
+    var composition = (await tester.runAsync(() => FileLottie(
+            File('example/assets/spinning_carrousel.zip'),
+            imageProviderFactory: imageProviderFactory)
+        .load()))!;
+
+    await tester.pumpWidget(FilmStrip(composition, size: size));
+
+    expect(callCount, 2);
+    await expectLater(find.byType(FilmStrip),
+        matchesGoldenFile('goldens/dynamic_image/zip_with_provider.png'));
+  });
+
+  testWidgets('Can specify image delegate', (tester) async {
+    var size = Size(500, 400);
+    tester.binding.window.physicalSizeTestValue = size;
+    tester.binding.window.devicePixelRatioTestValue = 1.0;
+
+    var image = await tester.runAsync(() =>
+        loadImage(FileImage(File('example/assets/Images/WeAccept/img_0.png'))));
+
+    var composition = (await tester.runAsync(() =>
+        FileLottie(File('example/assets/spinning_carrousel.zip')).load()))!;
+
+    var delegates = LottieDelegates(image: (composition, asset) {
+      return image;
+    });
+    await tester.pumpWidget(FilmStrip(
+      composition,
+      size: size,
+      delegates: delegates,
+    ));
+
+    await expectLater(find.byType(FilmStrip),
+        matchesGoldenFile('goldens/dynamic_image/delegate.png'));
+  });
+}
+
+Future<ui.Image?> loadImage(ImageProvider provider) {
+  var completer = Completer<ui.Image?>();
+  var imageStream = provider.resolve(ImageConfiguration.empty);
+  late ImageStreamListener listener;
+  listener = ImageStreamListener((image, synchronousLoaded) {
+    imageStream.removeListener(listener);
+
+    completer.complete(image.image);
+  }, onError: (dynamic e, __) {
+    imageStream.removeListener(listener);
+
+    completer.complete();
+  });
+  imageStream.addListener(listener);
+
+  return completer.future;
+}

test/dynamic_properties_test.dart

@@ -11,7 +11,7 @@ void main() {
 
   setUpAll(() async {
     composition = await LottieComposition.fromBytes(
-        File('assets/Tests/Shapes.json').readAsBytesSync());
+        File('example/assets/Tests/Shapes.json').readAsBytesSync());
   });
 
   void testGolden(String description, ValueDelegate delegate,
@@ -22,6 +22,9 @@ void main() {
         .replaceAll(' ', '_');
 
     testWidgets(description, (tester) async {
+      tester.binding.window.physicalSizeTestValue = Size(500, 400);
+      tester.binding.window.devicePixelRatioTestValue = 1.0;
+
       var animation =
           AnimationController(vsync: tester, duration: composition.duration);
       if (progress != null) {

test/dynamic_text_test.dart

@@ -1,13 +1,15 @@
 import 'dart:io';
-import 'dart:ui';
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:lottie/lottie.dart';
 
 void main() {
   testWidgets('Dynamic test', (tester) async {
+    tester.binding.window.physicalSizeTestValue = Size(500, 400);
+    tester.binding.window.devicePixelRatioTestValue = 1.0;
+
     var composition = await LottieComposition.fromBytes(
-        File('assets/Tests/DynamicText.json').readAsBytesSync());
+        File('example/assets/Tests/DynamicText.json').readAsBytesSync());
 
     await tester.pumpWidget(
       MaterialApp(

test/fireworks_test.dart

@@ -13,7 +13,7 @@ void main() {
     tester.binding.window.devicePixelRatioTestValue = 1.0;
 
     var composition = await LottieComposition.fromBytes(
-        File('assets/17297-fireworks.json').readAsBytesSync());
+        File('example/assets/17297-fireworks.json').readAsBytesSync());
 
     await tester.pumpWidget(FilmStrip(composition, size: size));
 

test/flutter_test_config.dart

@@ -0,0 +1,22 @@
+import 'dart:async';
+import 'dart:io';
+import 'package:flutter/services.dart';
+import 'package:path/path.dart' as path;
+
+Future<void> testExecutable(FutureOr<void> Function() testMain) async {
+  await loadFonts();
+  return testMain();
+}
+
+Future<void> loadFonts() async {
+  for (var file in Directory('example/assets/fonts')
+      .listSync()
+      .whereType<File>()
+      .where((f) => f.path.endsWith('.ttf'))) {
+    var fontLoader = FontLoader(
+        path.basenameWithoutExtension(file.path).replaceAll('-', ' '));
+    var future = file.readAsBytes().then((value) => value.buffer.asByteData());
+    fontLoader.addFont(future);
+    await fontLoader.load();
+  }
+}

test/golden_test.dart

@@ -7,7 +7,7 @@ import 'package:path/path.dart' as p;
 import 'utils.dart';
 
 void main() {
-  var root = 'assets';
+  var root = 'example/assets';
   for (var asset in Directory(root)
       .listSync(recursive: true)
       .whereType<File>()