Add latest feature/fixes from Lottie-Android (#209)

- Added support for rounded corners on shapes and rects
- Add support for text in dynamic properties (ValueDelegate)
- Improve stroke with offset
- Add support for reversed polystar paths
- Enforce order of operations to avoid rounding errors

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

@@ -10,11 +10,11 @@ jobs:
     name: Flutter analyze
     strategy:
       matrix:
-        flutter: ['beta']
+        flutter: ['stable']
     runs-on: macos-latest
     steps:
       - uses: actions/checkout@v2
-      - uses: subosito/flutter-action@v1
+      - uses: subosito/flutter-action@v2
         with:
           channel: ${{ matrix.flutter }}
       - run: flutter doctor
@@ -22,8 +22,8 @@ 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
+      - run: flutter test
+      - run: flutter test
         working-directory: example
       - run: flutter pub run tool/prepare_submit.dart
       - name: "check for uncommitted changes"
@@ -38,10 +38,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - uses: subosito/flutter-action@v1
+      - uses: subosito/flutter-action@v2
         with:
-          channel: 'beta'
-      - run: flutter config --enable-web
+          channel: 'stable'
       - run: flutter precache web
       - run: flutter pub get
         working-directory: example

.gitignore

@@ -3,6 +3,7 @@ _*
 
 !.gitignore
 !.github
+!.pubignore
 
 **/failures/*.png
 

.pubignore

@@ -0,0 +1,15 @@
+.dart_tool/
+.packages
+build/
+doc/api/
+*.iml
+_*
+.*
+**/failures/*.png
+test/golden/
+test/goldens/
+example/assets/
+example/android/
+example/ios/
+example/macos/
+example/web/

CHANGELOG.md

@@ -1,3 +1,28 @@
+## [1.3.0]
+- Added support for rounded corners on shapes and rects
+- Add support for text in dynamic properties (`ValueDelegate`)
+
+Example:
+
+```dart
+Lottie.asset(
+  'assets/DynamicText.json',
+  delegates: LottieDelegates(values: [
+    ValueDelegate.text(
+      ['Text layer'], // The path to the text element to change
+      value: 'The new text',
+    ),
+  ]),
+)
+```
+
+- Improve stroke with offset
+- Add support for reversed polystar paths
+- Enforce order of operations to avoid rounding errors
+
+## [1.2.2]
+- Internal maintenance: fix lints for Flutter 2.10
+
 ## [1.2.1]
 - Fix: Revert Cubic to `PathInterpolator.cubic`
 

example/android/.gitignore

@@ -5,3 +5,9 @@ gradle-wrapper.jar
 /gradlew.bat
 /local.properties
 GeneratedPluginRegistrant.java
+
+# Remember to never publicly share your keystore.
+# See https://flutter.dev/docs/deployment/android#reference-the-keystore-from-the-app
+key.properties
+**/*.keystore
+**/*.jks

example/android/app/build.gradle

@@ -8,7 +8,7 @@ if (localPropertiesFile.exists()) {
 
 def flutterRoot = localProperties.getProperty('flutter.sdk')
 if (flutterRoot == null) {
-    throw new Exception("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
+    throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
 }
 
 def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
@@ -26,23 +26,28 @@ apply plugin: 'kotlin-android'
 apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
 
 android {
-    compileSdkVersion 28
+    compileSdkVersion flutter.compileSdkVersion
+
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
+    kotlinOptions {
+        jvmTarget = '1.8'
+    }
 
     sourceSets {
         main.java.srcDirs += 'src/main/kotlin'
     }
 
-    lintOptions {
-        disable 'InvalidPackage'
-    }
-
     defaultConfig {
-        applicationId "com.github.xvrh.lottie.sample"
-        minSdkVersion 16
-        targetSdkVersion 28
+        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
+        applicationId "com.github.xvrh.lottie.example"
+        minSdkVersion flutter.minSdkVersion
+        targetSdkVersion flutter.targetSdkVersion
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName
-        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }
 
     buildTypes {
@@ -60,7 +65,4 @@ flutter {
 
 dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
-    testImplementation 'junit:junit:4.12'
-    androidTestImplementation 'androidx.test:runner:1.1.1'
-    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.1'
 }

example/android/app/src/debug/AndroidManifest.xml

@@ -1,5 +1,5 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="com.github.xvrh.lottie.sample">
+    package="com.github.xvrh.lottie.example">
     <!-- Flutter needs it to communicate with the running application
          to allow setting breakpoints, to provide hot reload, etc.
     -->

example/android/app/src/main/AndroidManifest.xml

@@ -1,21 +1,25 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="com.github.xvrh.lottie.sample">
-    <!-- io.flutter.app.FlutterApplication is an android.app.Application that
-         calls FlutterMain.startInitialization(this); in its onCreate method.
-         In most cases you can leave this as-is, but you if you want to provide
-         additional functionality it is fine to subclass or reimplement
-         FlutterApplication and put your custom class here. -->
-    <application
-        android:name="io.flutter.app.FlutterApplication"
+    package="com.github.xvrh.lottie.example">
+   <application
         android:label="example"
+        android:name="${applicationName}"
         android:icon="@mipmap/ic_launcher">
         <activity
             android:name=".MainActivity"
+            android:exported="true"
             android:launchMode="singleTop"
             android:theme="@style/LaunchTheme"
             android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
             android:hardwareAccelerated="true"
             android:windowSoftInputMode="adjustResize">
+            <!-- Specifies an Android theme to apply to this Activity as soon as
+                 the Android process has started. This theme is visible to the user
+                 while the Flutter UI initializes. After that, this theme continues
+                 to determine the Window background behind the Flutter UI. -->
+            <meta-data
+              android:name="io.flutter.embedding.android.NormalTheme"
+              android:resource="@style/NormalTheme"
+              />
             <intent-filter>
                 <action android:name="android.intent.action.MAIN"/>
                 <category android:name="android.intent.category.LAUNCHER"/>

example/android/app/src/main/kotlin/com/github/xvrh/lottie/example/MainActivity.kt

@@ -0,0 +1,6 @@
+package com.github.xvrh.lottie.example
+
+import io.flutter.embedding.android.FlutterActivity
+
+class MainActivity: FlutterActivity() {
+}

example/android/app/src/main/kotlin/com/github/xvrh/lottie/sample/MainActivity.kt

@@ -1,12 +0,0 @@
-package com.github.xvrh.lottie.sample
-
-import androidx.annotation.NonNull;
-import io.flutter.embedding.android.FlutterActivity
-import io.flutter.embedding.engine.FlutterEngine
-import io.flutter.plugins.GeneratedPluginRegistrant
-
-class MainActivity: FlutterActivity() {
-    override fun configureFlutterEngine(@NonNull flutterEngine: FlutterEngine) {
-        GeneratedPluginRegistrant.registerWith(flutterEngine);
-    }
-}

example/android/app/src/main/res/drawable-v21/launch_background.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Modify this file to customize your launch splash screen -->
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="?android:colorBackground" />
+
+    <!-- You can insert your own image assets here -->
+    <!-- <item>
+        <bitmap
+            android:gravity="center"
+            android:src="@mipmap/launch_image" />
+    </item> -->
+</layer-list>

example/android/app/src/main/res/values-night/styles.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <!-- Theme applied to the Android Window while the process is starting when the OS's Dark Mode setting is on -->
+    <style name="LaunchTheme" parent="@android:style/Theme.Black.NoTitleBar">
+        <!-- Show a splash screen on the activity. Automatically removed when
+             Flutter draws its first frame -->
+        <item name="android:windowBackground">@drawable/launch_background</item>
+    </style>
+    <!-- Theme applied to the Android Window as soon as the process has started.
+         This theme determines the color of the Android Window while your
+         Flutter UI initializes, as well as behind your Flutter UI while its
+         running.
+
+         This Theme is only used starting with V2 of Flutter's Android embedding. -->
+    <style name="NormalTheme" parent="@android:style/Theme.Black.NoTitleBar">
+        <item name="android:windowBackground">?android:colorBackground</item>
+    </style>
+</resources>

example/android/app/src/main/res/values/styles.xml

@@ -1,8 +1,18 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <style name="LaunchTheme" parent="@android:style/Theme.Black.NoTitleBar">
+    <!-- Theme applied to the Android Window while the process is starting when the OS's Dark Mode setting is off -->
+    <style name="LaunchTheme" parent="@android:style/Theme.Light.NoTitleBar">
         <!-- Show a splash screen on the activity. Automatically removed when
              Flutter draws its first frame -->
         <item name="android:windowBackground">@drawable/launch_background</item>
     </style>
+    <!-- Theme applied to the Android Window as soon as the process has started.
+         This theme determines the color of the Android Window while your
+         Flutter UI initializes, as well as behind your Flutter UI while its
+         running.
+
+         This Theme is only used starting with V2 of Flutter's Android embedding. -->
+    <style name="NormalTheme" parent="@android:style/Theme.Light.NoTitleBar">
+        <item name="android:windowBackground">?android:colorBackground</item>
+    </style>
 </resources>

example/android/app/src/profile/AndroidManifest.xml

@@ -1,5 +1,5 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="com.github.xvrh.lottie.sample">
+    package="com.github.xvrh.lottie.example">
     <!-- Flutter needs it to communicate with the running application
          to allow setting breakpoints, to provide hot reload, etc.
     -->

example/android/build.gradle

@@ -1,12 +1,12 @@
 buildscript {
-    ext.kotlin_version = '1.3.50'
+    ext.kotlin_version = '1.6.10'
     repositories {
         google()
-        jcenter()
+        mavenCentral()
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.5.0'
+        classpath 'com.android.tools.build:gradle:4.1.0'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
     }
 }
@@ -14,7 +14,7 @@ buildscript {
 allprojects {
     repositories {
         google()
-        jcenter()
+        mavenCentral()
     }
 }
 

example/android/gradle.properties

@@ -1,4 +1,3 @@
 org.gradle.jvmargs=-Xmx1536M
-android.enableR8=true
 android.useAndroidX=true
 android.enableJetifier=true

example/android/gradle/wrapper/gradle-wrapper.properties

@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.2-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.7-all.zip

example/android/settings.gradle

@@ -1,15 +1,11 @@
 include ':app'
 
-def flutterProjectRoot = rootProject.projectDir.parentFile.toPath()
+def localPropertiesFile = new File(rootProject.projectDir, "local.properties")
+def properties = new Properties()
 
-def plugins = new Properties()
-def pluginsFile = new File(flutterProjectRoot.toFile(), '.flutter-plugins')
-if (pluginsFile.exists()) {
-    pluginsFile.withReader('UTF-8') { reader -> plugins.load(reader) }
-}
+assert localPropertiesFile.exists()
+localPropertiesFile.withReader("UTF-8") { reader -> properties.load(reader) }
 
-plugins.each { name, path ->
-    def pluginDirectory = flutterProjectRoot.resolve(path).resolve('android').toFile()
-    include ":$name"
-    project(":$name").projectDir = pluginDirectory
-}
+def flutterSdkPath = properties.getProperty("flutter.sdk")
+assert flutterSdkPath != null, "flutter.sdk not set in local.properties"
+apply from: "$flutterSdkPath/packages/flutter_tools/gradle/app_plugin_loader.gradle"

example/assets/Tests/ReversedStar.json

@@ -0,0 +1,288 @@
+{
+  "v": "5.8.2",
+  "fr": 24,
+  "ip": 0,
+  "op": 94,
+  "w": 150,
+  "h": 150,
+  "nm": "Anim_load",
+  "ddd": 0,
+  "assets": [],
+  "layers": [
+    {
+      "ddd": 0,
+      "ind": 1,
+      "ty": 4,
+      "nm": "LF03",
+      "sr": 1,
+      "ks": {
+        "o": {
+          "a": 0,
+          "k": 100,
+          "ix": 11
+        },
+        "r": {
+          "a": 0,
+          "k": -19,
+          "ix": 10
+        },
+        "p": {
+          "a": 0,
+          "k": [
+            75,
+            76.005,
+            0
+          ],
+          "ix": 2,
+          "l": 2
+        },
+        "a": {
+          "a": 0,
+          "k": [
+            0,
+            0,
+            0
+          ],
+          "ix": 1,
+          "l": 2
+        },
+        "s": {
+          "a": 0,
+          "k": [
+            19.986,
+            19.986,
+            100
+          ],
+          "ix": 6,
+          "l": 2
+        }
+      },
+      "ao": 0,
+      "shapes": [
+        {
+          "ty": "gr",
+          "it": [
+            {
+              "ty": "sr",
+              "sy": 1,
+              "d": 3,
+              "pt": {
+                "a": 0,
+                "k": 14,
+                "ix": 3
+              },
+              "p": {
+                "a": 0,
+                "k": [
+                  0,
+                  0
+                ],
+                "ix": 4
+              },
+              "r": {
+                "a": 0,
+                "k": 0,
+                "ix": 5
+              },
+              "ir": {
+                "a": 0,
+                "k": 91.612,
+                "ix": 6
+              },
+              "is": {
+                "a": 0,
+                "k": 0,
+                "ix": 8
+              },
+              "or": {
+                "a": 0,
+                "k": 113.225,
+                "ix": 7
+              },
+              "os": {
+                "a": 0,
+                "k": 0,
+                "ix": 9
+              },
+              "ix": 1,
+              "nm": "Polystar Path 1",
+              "mn": "ADBE Vector Shape - Star",
+              "hd": false
+            },
+            {
+              "ty": "st",
+              "c": {
+                "a": 0,
+                "k": [
+                  0.937254905701,
+                  0.89411765337,
+                  0.850980401039,
+                  1
+                ],
+                "ix": 3
+              },
+              "o": {
+                "a": 0,
+                "k": 100,
+                "ix": 4
+              },
+              "w": {
+                "a": 0,
+                "k": 30,
+                "ix": 5
+              },
+              "lc": 1,
+              "lj": 1,
+              "ml": 4,
+              "bm": 0,
+              "nm": "Stroke 1",
+              "mn": "ADBE Vector Graphic - Stroke",
+              "hd": false
+            },
+            {
+              "ty": "tr",
+              "p": {
+                "a": 0,
+                "k": [
+                  -1.979,
+                  -0.604
+                ],
+                "ix": 2
+              },
+              "a": {
+                "a": 0,
+                "k": [
+                  0,
+                  0
+                ],
+                "ix": 1
+              },
+              "s": {
+                "a": 0,
+                "k": [
+                  100,
+                  100
+                ],
+                "ix": 3
+              },
+              "r": {
+                "a": 0,
+                "k": 0,
+                "ix": 6
+              },
+              "o": {
+                "a": 0,
+                "k": 100,
+                "ix": 7
+              },
+              "sk": {
+                "a": 0,
+                "k": 0,
+                "ix": 4
+              },
+              "sa": {
+                "a": 0,
+                "k": 0,
+                "ix": 5
+              },
+              "nm": "Transform"
+            }
+          ],
+          "nm": "Polystar 1",
+          "np": 2,
+          "cix": 2,
+          "bm": 0,
+          "ix": 1,
+          "mn": "ADBE Vector Group",
+          "hd": false
+        },
+        {
+          "ty": "tm",
+          "s": {
+            "a": 1,
+            "k": [
+              {
+                "i": {
+                  "x": [
+                    0.667
+                  ],
+                  "y": [
+                    1
+                  ]
+                },
+                "o": {
+                  "x": [
+                    0.333
+                  ],
+                  "y": [
+                    0
+                  ]
+                },
+                "t": -0.127,
+                "s": [
+                  100
+                ]
+              },
+              {
+                "t": 32,
+                "s": [
+                  0
+                ]
+              }
+            ],
+            "ix": 1
+          },
+          "e": {
+            "a": 1,
+            "k": [
+              {
+                "i": {
+                  "x": [
+                    0.833
+                  ],
+                  "y": [
+                    1
+                  ]
+                },
+                "o": {
+                  "x": [
+                    0.333
+                  ],
+                  "y": [
+                    0
+                  ]
+                },
+                "t": 36,
+                "s": [
+                  100
+                ]
+              },
+              {
+                "t": 68,
+                "s": [
+                  0
+                ]
+              }
+            ],
+            "ix": 2
+          },
+          "o": {
+            "a": 0,
+            "k": -43,
+            "ix": 3
+          },
+          "m": 1,
+          "ix": 2,
+          "nm": "Trim Paths 1",
+          "mn": "ADBE Vector Filter - Trim",
+          "hd": false
+        }
+      ],
+      "ip": 0,
+      "op": 94,
+      "st": 18,
+      "bm": 0
+    }
+  ],
+  "markers": []
+}

example/assets/Tests/RoundedCorners.json

@@ -0,0 +1,390 @@
+{
+  "v": "5.8.1",
+  "fr": 29.9700012207031,
+  "ip": 0,
+  "op": 900.000036657751,
+  "w": 1000,
+  "h": 1000,
+  "nm": "Rounded Corners",
+  "ddd": 0,
+  "assets": [],
+  "layers": [
+    {
+      "ddd": 0,
+      "ind": 1,
+      "ty": 4,
+      "nm": "Shape Layer 1",
+      "sr": 1,
+      "ks": {
+        "o": {
+          "a": 0,
+          "k": 100,
+          "ix": 11
+        },
+        "r": {
+          "a": 0,
+          "k": 0,
+          "ix": 10
+        },
+        "p": {
+          "a": 0,
+          "k": [
+            500,
+            500,
+            0
+          ],
+          "ix": 2,
+          "l": 2
+        },
+        "a": {
+          "a": 0,
+          "k": [
+            0,
+            0,
+            0
+          ],
+          "ix": 1,
+          "l": 2
+        },
+        "s": {
+          "a": 0,
+          "k": [
+            100,
+            100,
+            100
+          ],
+          "ix": 6,
+          "l": 2
+        }
+      },
+      "ao": 0,
+      "shapes": [
+        {
+          "ind": 0,
+          "ty": "sh",
+          "ix": 1,
+          "ks": {
+            "a": 0,
+            "k": {
+              "i": [
+                [
+                  0,
+                  0
+                ],
+                [
+                  0,
+                  0
+                ],
+                [
+                  0,
+                  0
+                ],
+                [
+                  0,
+                  0
+                ]
+              ],
+              "o": [
+                [
+                  0,
+                  0
+                ],
+                [
+                  0,
+                  0
+                ],
+                [
+                  0,
+                  0
+                ],
+                [
+                  0,
+                  0
+                ]
+              ],
+              "v": [
+                [
+                  -75,
+                  -475
+                ],
+                [
+                  -75,
+                  -75
+                ],
+                [
+                  -475,
+                  -75
+                ],
+                [
+                  -475,
+                  -475
+                ]
+              ],
+              "c": true
+            },
+            "ix": 2
+          },
+          "nm": "Path 1",
+          "mn": "ADBE Vector Shape - Group",
+          "hd": false
+        },
+        {
+          "ty": "rc",
+          "d": 1,
+          "s": {
+            "a": 0,
+            "k": [
+              400,
+              400
+            ],
+            "ix": 2
+          },
+          "p": {
+            "a": 0,
+            "k": [
+              275,
+              -275
+            ],
+            "ix": 3
+          },
+          "r": {
+            "a": 0,
+            "k": 0,
+            "ix": 4
+          },
+          "nm": "Rectangle Path 1",
+          "mn": "ADBE Vector Shape - Rect",
+          "hd": false
+        },
+        {
+          "ty": "sr",
+          "sy": 1,
+          "d": 1,
+          "pt": {
+            "a": 0,
+            "k": 5,
+            "ix": 3
+          },
+          "p": {
+            "a": 0,
+            "k": [
+              275,
+              275
+            ],
+            "ix": 4
+          },
+          "r": {
+            "a": 0,
+            "k": 0,
+            "ix": 5
+          },
+          "ir": {
+            "a": 0,
+            "k": 107,
+            "ix": 6
+          },
+          "is": {
+            "a": 0,
+            "k": 0,
+            "ix": 8
+          },
+          "or": {
+            "a": 0,
+            "k": 275,
+            "ix": 7
+          },
+          "os": {
+            "a": 0,
+            "k": 0,
+            "ix": 9
+          },
+          "ix": 3,
+          "nm": "Polystar Path 1",
+          "mn": "ADBE Vector Shape - Star",
+          "hd": false
+        },
+        {
+          "ind": 3,
+          "ty": "sh",
+          "ix": 4,
+          "ks": {
+            "a": 0,
+            "k": {
+              "i": [
+                [
+                  0,
+                  0
+                ],
+                [
+                  0,
+                  0
+                ],
+                [
+                  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
+                ],
+                [
+                  0,
+                  0
+                ],
+                [
+                  0,
+                  0
+                ]
+              ],
+              "v": [
+                [
+                  -275,
+                  0
+                ],
+                [
+                  -212.107,
+                  188.435
+                ],
+                [
+                  -13.459,
+                  190.02
+                ],
+                [
+                  -173.237,
+                  308.065
+                ],
+                [
+                  -113.359,
+                  497.48
+                ],
+                [
+                  -275,
+                  382
+                ],
+                [
+                  -436.641,
+                  497.48
+                ],
+                [
+                  -376.763,
+                  308.065
+                ],
+                [
+                  -536.541,
+                  190.02
+                ],
+                [
+                  -337.893,
+                  188.435
+                ]
+              ],
+              "c": true
+            },
+            "ix": 2
+          },
+          "nm": "Path 2",
+          "mn": "ADBE Vector Shape - Group",
+          "hd": false
+        },
+        {
+          "ty": "rd",
+          "nm": "Round Corners 1",
+          "r": {
+            "a": 0,
+            "k": 136,
+            "ix": 1
+          },
+          "ix": 5,
+          "mn": "ADBE Vector Filter - RC",
+          "hd": false
+        },
+        {
+          "ty": "fl",
+          "c": {
+            "a": 0,
+            "k": [
+              1,
+              0,
+              0,
+              1
+            ],
+            "ix": 4
+          },
+          "o": {
+            "a": 0,
+            "k": 100,
+            "ix": 5
+          },
+          "r": 1,
+          "bm": 0,
+          "nm": "Fill 1",
+          "mn": "ADBE Vector Graphic - Fill",
+          "hd": false
+        }
+      ],
+      "ip": 0,
+      "op": 900.000036657751,
+      "st": 0,
+      "bm": 0
+    }
+  ],
+  "markers": []
+}

example/ios/Runner.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>

example/ios/Runner.xcodeproj/project.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>PreviewsEnabled</key>
+	<false/>
+</dict>
+</plist>

example/ios/Runner.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>PreviewsEnabled</key>
+	<false/>
+</dict>
+</plist>

example/lib/examples/custom_draw.dart

@@ -1,6 +1,5 @@
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
-import 'package:flutter/widgets.dart';
 import 'package:lottie/lottie.dart';
 
 void main() => runApp(const MyApp());

example/lib/examples/custom_load.dart

@@ -1,6 +1,5 @@
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
-import 'package:flutter/widgets.dart';
 import 'package:lottie/lottie.dart';
 
 void main() => runApp(const MyApp());

example/lib/examples/dynamic_properties.dart

@@ -1,4 +1,3 @@
-import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_colorpicker/flutter_colorpicker.dart';
 import 'package:lottie/lottie.dart';
@@ -72,7 +71,7 @@ class _AppState extends State<App> with TickerProviderStateMixin {
                       _color = newColor;
                     });
                   },
-                  showLabel: false,
+                  labelTypes: const [],
                   enableAlpha: false,
                   pickerAreaHeightPercent: 0.8,
                 ),

example/lib/main_app.dart

@@ -1,4 +1,3 @@
-import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 import 'package:logging/logging.dart';
 import 'package:lottie/lottie.dart';

example/pubspec.lock

@@ -7,14 +7,14 @@ packages:
       name: archive
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.1.2"
+    version: "3.3.0"
   async:
     dependency: transitive
     description:
       name: async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.5.0"
+    version: "2.8.2"
   boolean_selector:
     dependency: transitive
     description:
@@ -28,14 +28,14 @@ packages:
       name: characters
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0"
+    version: "1.2.0"
   charcode:
     dependency: transitive
     description:
       name: charcode
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0"
+    version: "1.3.1"
   clock:
     dependency: transitive
     description:
@@ -89,14 +89,14 @@ packages:
       name: flutter_colorpicker
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.5.0"
+    version: "1.0.3"
   flutter_lints:
     dependency: "direct dev"
     description:
       name: flutter_lints
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.3"
+    version: "1.0.4"
   flutter_test:
     dependency: "direct dev"
     description: flutter
@@ -108,14 +108,14 @@ packages:
       name: golden_toolkit
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.9.0"
+    version: "0.13.0"
   http:
     dependency: "direct main"
     description:
       name: http
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.13.3"
+    version: "0.13.4"
   http_parser:
     dependency: transitive
     description:
@@ -136,28 +136,35 @@ packages:
       name: logging
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.1"
+    version: "1.0.2"
   lottie:
     dependency: "direct main"
     description:
       path: ".."
       relative: true
     source: path
-    version: "1.2.0"
+    version: "1.3.0"
   matcher:
     dependency: transitive
     description:
       name: matcher
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.12.10"
+    version: "0.12.11"
+  material_color_utilities:
+    dependency: transitive
+    description:
+      name: material_color_utilities
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.1.3"
   meta:
     dependency: transitive
     description:
       name: meta
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.0"
+    version: "1.7.0"
   path:
     dependency: transitive
     description:
@@ -171,63 +178,70 @@ packages:
       name: path_provider
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.2"
+    version: "2.0.9"
+  path_provider_android:
+    dependency: transitive
+    description:
+      name: path_provider_android
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.12"
+  path_provider_ios:
+    dependency: transitive
+    description:
+      name: path_provider_ios
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.8"
   path_provider_linux:
     dependency: transitive
     description:
       name: path_provider_linux
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.0"
+    version: "2.1.5"
   path_provider_macos:
     dependency: transitive
     description:
       name: path_provider_macos
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.0"
+    version: "2.0.5"
   path_provider_platform_interface:
     dependency: transitive
     description:
       name: path_provider_platform_interface
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.1"
+    version: "2.0.3"
   path_provider_windows:
     dependency: transitive
     description:
       name: path_provider_windows
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.1"
-  pedantic:
-    dependency: transitive
-    description:
-      name: pedantic
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.11.1"
+    version: "2.0.5"
   platform:
     dependency: transitive
     description:
       name: platform
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.0.0"
+    version: "3.1.0"
   plugin_platform_interface:
     dependency: transitive
     description:
       name: plugin_platform_interface
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.0"
+    version: "2.1.2"
   process:
     dependency: transitive
     description:
       name: process
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "4.2.1"
+    version: "4.2.4"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -274,7 +288,7 @@ packages:
       name: test_api
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.3.0"
+    version: "0.4.8"
   typed_data:
     dependency: transitive
     description:
@@ -288,21 +302,21 @@ packages:
       name: vector_math
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0"
+    version: "2.1.1"
   win32:
     dependency: transitive
     description:
       name: win32
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.2.5"
+    version: "2.5.1"
   xdg_directories:
     dependency: transitive
     description:
       name: xdg_directories
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.2.0"
+    version: "0.2.0+1"
 sdks:
-  dart: ">=2.13.0 <3.0.0"
-  flutter: ">=1.20.0"
+  dart: ">=2.15.0 <3.0.0"
+  flutter: ">=2.10.0"

example/web/manifest.json

@@ -0,0 +1,35 @@
+{
+    "name": "example",
+    "short_name": "example",
+    "start_url": ".",
+    "display": "standalone",
+    "background_color": "#0175C2",
+    "theme_color": "#0175C2",
+    "description": "A new Flutter project.",
+    "orientation": "portrait-primary",
+    "prefer_related_applications": false,
+    "icons": [
+        {
+            "src": "icons/Icon-192.png",
+            "sizes": "192x192",
+            "type": "image/png"
+        },
+        {
+            "src": "icons/Icon-512.png",
+            "sizes": "512x512",
+            "type": "image/png"
+        },
+        {
+            "src": "icons/Icon-maskable-192.png",
+            "sizes": "192x192",
+            "type": "image/png",
+            "purpose": "maskable"
+        },
+        {
+            "src": "icons/Icon-maskable-512.png",
+            "sizes": "512x512",
+            "type": "image/png",
+            "purpose": "maskable"
+        }
+    ]
+}

lib/src/animation/content/base_stroke_content.dart

@@ -196,7 +196,8 @@ abstract class BaseStrokeContent
   void _applyTrimPath(
       Canvas canvas, _PathGroup pathGroup, Matrix4 parentMatrix) {
     L.beginSection('StrokeContent#applyTrimPath');
-    if (pathGroup.trimPath == null) {
+    var trimPath = pathGroup.trimPath;
+    if (trimPath == null) {
       L.endSection('StrokeContent#applyTrimPath');
       return;
     }
@@ -205,13 +206,24 @@ abstract class BaseStrokeContent
       _path.addPath(pathGroup.paths[j].getPath(), Offset.zero,
           matrix4: parentMatrix.storage);
     }
+    var animStartValue = trimPath.start.value / 100;
+    var animEndValue = trimPath.end.value / 100;
+    var animOffsetValue = trimPath.offset.value / 360;
+
+    // If the start-end is ~100, consider it to be the full path.
+    if (animStartValue < 0.01 && animEndValue > 0.99) {
+      canvas.drawPath(_path, paint);
+      L.endSection('StrokeContent#applyTrimPath');
+      return;
+    }
+
     var pathMetrics = _path.computeMetrics().toList();
     var totalLength = pathMetrics.fold<double>(0.0, (a, b) => a + b.length);
 
-    var trimPath = pathGroup.trimPath!;
-    var offsetLength = totalLength * trimPath.offset.value / 360.0;
-    var startLength = totalLength * trimPath.start.value / 100.0 + offsetLength;
-    var endLength = totalLength * trimPath.end.value / 100.0 + offsetLength;
+    var offsetLength = totalLength * animOffsetValue;
+    var startLength = totalLength * animStartValue + offsetLength;
+    var endLength = min(totalLength * animEndValue + offsetLength,
+        startLength + totalLength - 1);
 
     var currentLength = 0.0;
     for (var j = pathGroup.paths.length - 1; j >= 0; j--) {

lib/src/animation/content/polystar_content.dart

@@ -134,6 +134,9 @@ class PolystarContent implements PathContent, KeyPathElementContent {
     currentAngle = radians(currentAngle);
     // adjust current angle for partial points
     var anglePerPoint = 2 * pi / points;
+    if (_polystarShape.isReversed) {
+      anglePerPoint *= -1;
+    }
     var halfAnglePerPoint = anglePerPoint / 2.0;
     var partialPointAmount = points - points.toInt();
     if (partialPointAmount != 0) {

lib/src/animation/content/rectangle_content.dart

@@ -15,6 +15,7 @@ import 'compound_trim_path_content.dart';
 import 'content.dart';
 import 'key_path_element_content.dart';
 import 'path_content.dart';
+import 'rounded_corners_content.dart';
 import 'trim_path_content.dart';
 
 class RectangleContent implements KeyPathElementContent, PathContent {
@@ -29,6 +30,9 @@ class RectangleContent implements KeyPathElementContent, PathContent {
   final BaseKeyframeAnimation<Object, double> _cornerRadiusAnimation;
 
   final CompoundTrimPathContent _trimPaths = CompoundTrimPathContent();
+
+  /// This corner radius is from a layer item. The first one is from the roundedness on this specific rect.
+  BaseKeyframeAnimation<double, double>? _roundedCornersAnimation;
   bool _isPathValid = false;
 
   RectangleContent(
@@ -61,6 +65,8 @@ class RectangleContent implements KeyPathElementContent, PathContent {
         var trimPath = content;
         _trimPaths.addTrimPath(trimPath);
         trimPath.addListener(invalidate);
+      } else if (content is RoundedCornersContent) {
+        _roundedCornersAnimation = content.roundedCorners;
       }
     }
   }
@@ -82,6 +88,10 @@ class RectangleContent implements KeyPathElementContent, PathContent {
     var halfWidth = size.dx / 2.0;
     var halfHeight = size.dy / 2.0;
     var radius = _cornerRadiusAnimation.value;
+    var roundedCornersAnimation = _roundedCornersAnimation;
+    if (radius == 0 && roundedCornersAnimation != null) {
+      radius = min(roundedCornersAnimation.value, min(halfWidth, halfHeight));
+    }
     var maxRadius = min(halfWidth, halfHeight);
     if (radius > maxRadius) {
       radius = maxRadius;

lib/src/animation/content/rounded_corners_content.dart

@@ -0,0 +1,236 @@
+import 'dart:math' as math;
+import 'dart:ui';
+import '../../lottie_drawable.dart';
+import '../../model/content/rounded_corners.dart';
+import '../../model/content/shape_data.dart';
+import '../../model/cubic_curve_data.dart';
+import '../../model/layer/base_layer.dart';
+import '../../utils.dart';
+import '../keyframe/base_keyframe_animation.dart';
+import 'content.dart';
+import 'shape_modifier_content.dart';
+
+class RoundedCornersContent implements ShapeModifierContent {
+  /// Copied from:
+  /// https://github.com/airbnb/lottie-web/blob/bb71072a26e03f1ca993da60915860f39aae890b/player/js/utils/common.js#L47
+  static const _roundedCornerMagicNumber = 0.5519;
+
+  final LottieDrawable lottieDrawable;
+
+  @override
+  final String name;
+  final BaseKeyframeAnimation<double, double> roundedCorners;
+  ShapeData? shapeData;
+
+  RoundedCornersContent(
+      this.lottieDrawable, BaseLayer layer, RoundedCorners roundedCorners)
+      : name = roundedCorners.name,
+        roundedCorners = roundedCorners.cornerRadius.createAnimation() {
+    layer.addAnimation(this.roundedCorners);
+    this.roundedCorners.addUpdateListener(_onValueChanged);
+  }
+
+  void _onValueChanged() {
+    lottieDrawable.invalidateSelf();
+  }
+
+  @override
+  void setContents(List<Content> contentsBefore, List<Content> contentsAfter) {
+    // Do nothing.
+  }
+
+  /// Rounded corner algorithm:
+  /// Iterate through each vertex.
+  /// If a vertex is a sharp corner, it rounds it.
+  /// If a vertex has control points, it is already rounded, so it does nothing.
+  /// <p>
+  /// To round a vertex:
+  /// Split the vertex into two.
+  /// Move vertex 1 directly towards the previous vertex.
+  /// Set vertex 1's in control point to itself so it is not rounded on that side.
+  /// Extend vertex 1's out control point towards the original vertex.
+  /// <p>
+  /// Repeat for vertex 2:
+  /// Move vertex 2 directly towards the next vertex.
+  /// Set vertex 2's out point to itself so it is not rounded on that side.
+  /// Extend vertex 2's in control point towards the original vertex.
+  /// <p>
+  /// The distance that the vertices and control points are moved are relative to the
+  /// shape's vertex distances and the roundedness set in the animation.
+  @override
+  ShapeData modifyShape(ShapeData startingShapeData) {
+    var startingCurves = startingShapeData.curves;
+    if (startingCurves.length <= 2) {
+      return startingShapeData;
+    }
+    var roundedness = roundedCorners.value;
+    if (roundedness == 0) {
+      return startingShapeData;
+    }
+
+    var modifiedShapeData = _getShapeData(startingShapeData);
+    modifiedShapeData.setInitialPoint(
+        startingShapeData.initialPoint.dx, startingShapeData.initialPoint.dy);
+    var modifiedCurves = modifiedShapeData.curves;
+    var modifiedCurvesIndex = 0;
+    var isClosed = startingShapeData.isClosed;
+
+    // i represents which vertex we are currently on. Refer to the docs of CubicCurveData prior to working with
+    // this code.
+    // When i == 0
+    //    vertex=ShapeData.initialPoint
+    //    inCp=if closed vertex else curves[size - 1].cp2
+    //    outCp=curves[0].cp1
+    // When i == 1
+    //    vertex=curves[0].vertex
+    //    inCp=curves[0].cp2
+    //    outCp=curves[1].cp1.
+    // When i == size - 1
+    //    vertex=curves[size - 1].vertex
+    //    inCp=curves[size - 1].cp2
+    //    outCp=if closed vertex else curves[0].cp1
+    for (var i = 0; i < startingCurves.length; i++) {
+      var startingCurve = startingCurves[i];
+      var previousCurve =
+          startingCurves[floorMod(i - 1, startingCurves.length)];
+      var previousPreviousCurve =
+          startingCurves[floorMod(i - 2, startingCurves.length)];
+      var vertex = (i == 0 && !isClosed)
+          ? startingShapeData.initialPoint
+          : previousCurve.vertex;
+      var inPoint =
+          (i == 0 && !isClosed) ? vertex : previousCurve.controlPoint2;
+      var outPoint = startingCurve.controlPoint1;
+      var previousVertex = previousPreviousCurve.vertex;
+      var nextVertex = startingCurve.vertex;
+
+      // We can't round the corner of the end of a non-closed curve.
+      var isEndOfCurve = !startingShapeData.isClosed &&
+          (i == 0 && i == startingCurves.length - 1);
+      if (inPoint == vertex && outPoint == vertex && !isEndOfCurve) {
+        // This vertex is a point. Round its corners
+        var dxToPreviousVertex = vertex.dx - previousVertex.dx;
+        var dyToPreviousVertex = vertex.dy - previousVertex.dy;
+        var dxToNextVertex = nextVertex.dx - vertex.dx;
+        var dyToNextVertex = nextVertex.dy - vertex.dy;
+
+        var dToPreviousVertex = hypot(dxToPreviousVertex, dyToPreviousVertex);
+        var dToNextVertex = hypot(dxToNextVertex, dyToNextVertex);
+
+        double previousVertexPercent =
+            math.min(roundedness / dToPreviousVertex, 0.5);
+        double nextVertexPercent = math.min(roundedness / dToNextVertex, 0.5);
+
+        // Split the vertex into two and move each vertex towards the previous/next vertex.
+        var newVertex1X =
+            vertex.dx + (previousVertex.dx - vertex.dx) * previousVertexPercent;
+        var newVertex1Y =
+            vertex.dy + (previousVertex.dy - vertex.dy) * previousVertexPercent;
+        var newVertex2X =
+            vertex.dx + (nextVertex.dx - vertex.dx) * nextVertexPercent;
+        var newVertex2Y =
+            vertex.dy + (nextVertex.dy - vertex.dy) * nextVertexPercent;
+
+        // Extend the new vertex control point towards the original vertex.
+        var newVertex1OutPointX =
+            newVertex1X - (newVertex1X - vertex.dx) * _roundedCornerMagicNumber;
+        var newVertex1OutPointY =
+            newVertex1Y - (newVertex1Y - vertex.dy) * _roundedCornerMagicNumber;
+        var newVertex2InPointX =
+            newVertex2X - (newVertex2X - vertex.dx) * _roundedCornerMagicNumber;
+        var newVertex2InPointY =
+            newVertex2Y - (newVertex2Y - vertex.dy) * _roundedCornerMagicNumber;
+
+        // Remap vertex/in/out point to CubicCurveData.
+        // Refer to the docs for CubicCurveData for more info on the difference.
+        var previousCurveData = modifiedCurves[
+            floorMod(modifiedCurvesIndex - 1, modifiedCurves.length)];
+        var currentCurveData = modifiedCurves[modifiedCurvesIndex];
+        previousCurveData.controlPoint2 = Offset(newVertex1X, newVertex1Y);
+        previousCurveData.vertex = Offset(newVertex1X, newVertex1Y);
+        if (i == 0) {
+          modifiedShapeData.setInitialPoint(newVertex1X, newVertex1Y);
+        }
+        currentCurveData.controlPoint1 =
+            Offset(newVertex1OutPointX, newVertex1OutPointY);
+        modifiedCurvesIndex++;
+
+        previousCurveData = currentCurveData;
+        currentCurveData = modifiedCurves[modifiedCurvesIndex];
+        previousCurveData.controlPoint2 =
+            Offset(newVertex2InPointX, newVertex2InPointY);
+        previousCurveData.vertex = Offset(newVertex2X, newVertex2Y);
+        currentCurveData.controlPoint1 = Offset(newVertex2X, newVertex2Y);
+        modifiedCurvesIndex++;
+      } else {
+        // This vertex is not a point. Don't modify it. Refer to the documentation above and for CubicCurveData for mapping a vertex
+        // oriented point to CubicCurveData (path segments).
+        var previousCurveData = modifiedCurves[
+            floorMod(modifiedCurvesIndex - 1, modifiedCurves.length)];
+        var currentCurveData = modifiedCurves[modifiedCurvesIndex];
+        previousCurveData.controlPoint2 =
+            Offset(previousCurve.vertex.dx, previousCurve.vertex.dy);
+        previousCurveData.vertex =
+            Offset(previousCurve.vertex.dx, previousCurve.vertex.dy);
+        currentCurveData.controlPoint1 =
+            Offset(startingCurve.vertex.dx, startingCurve.vertex.dy);
+        modifiedCurvesIndex++;
+      }
+    }
+    return modifiedShapeData;
+  }
+
+  /// Returns a shape data with the correct number of vertices for the rounded corners shape.
+  /// This just returns the object. It does not update any values within the shape.
+
+  ShapeData _getShapeData(ShapeData startingShapeData) {
+    var startingCurves = startingShapeData.curves;
+    var isClosed = startingShapeData.isClosed;
+    var vertices = 0;
+    for (var i = startingCurves.length - 1; i >= 0; i--) {
+      var startingCurve = startingCurves[i];
+      var previousCurve =
+          startingCurves[floorMod(i - 1, startingCurves.length)];
+      var vertex = (i == 0 && !isClosed)
+          ? startingShapeData.initialPoint
+          : previousCurve.vertex;
+      var inPoint =
+          (i == 0 && !isClosed) ? vertex : previousCurve.controlPoint2;
+      var outPoint = startingCurve.controlPoint1;
+
+      var isEndOfCurve = !startingShapeData.isClosed &&
+          (i == 0 && i == startingCurves.length - 1);
+      if (inPoint == vertex && outPoint == vertex && !isEndOfCurve) {
+        vertices += 2;
+      } else {
+        vertices += 1;
+      }
+    }
+    var shapeData = this.shapeData;
+    if (shapeData == null || shapeData.curves.length != vertices) {
+      var newCurves = <CubicCurveData>[];
+      for (var i = 0; i < vertices; i++) {
+        newCurves.add(CubicCurveData());
+      }
+      this.shapeData = shapeData =
+          ShapeData(newCurves, initialPoint: Offset.zero, closed: false);
+    }
+    shapeData.setClosed(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;
+  }
+}

lib/src/animation/content/shape_content.dart

@@ -5,10 +5,11 @@ import '../../model/content/shape_trim_path.dart';
 import '../../model/layer/base_layer.dart';
 import '../../utils.dart';
 import '../../utils/path_factory.dart';
-import '../keyframe/base_keyframe_animation.dart';
+import '../keyframe/shape_keyframe_animation.dart';
 import 'compound_trim_path_content.dart';
 import 'content.dart';
 import 'path_content.dart';
+import 'shape_modifier_content.dart';
 import 'trim_path_content.dart';
 
 class ShapeContent implements PathContent {
@@ -17,7 +18,7 @@ class ShapeContent implements PathContent {
   final ShapePath _shape;
 
   final LottieDrawable lottieDrawable;
-  final BaseKeyframeAnimation<Object, Path> _shapeAnimation;
+  final ShapeKeyframeAnimation _shapeAnimation;
 
   bool _isPathValid = false;
   final _trimPaths = CompoundTrimPathContent();
@@ -35,6 +36,7 @@ class ShapeContent implements PathContent {
 
   @override
   void setContents(List<Content> contentsBefore, List<Content> contentsAfter) {
+    List<ShapeModifierContent>? shapeModifierContents;
     for (var i = 0; i < contentsBefore.length; i++) {
       var content = contentsBefore[i];
       if (content is TrimPathContent &&
@@ -43,8 +45,12 @@ class ShapeContent implements PathContent {
         var trimPath = content;
         _trimPaths.addTrimPath(trimPath);
         trimPath.addListener(_invalidate);
+      } else if (content is ShapeModifierContent) {
+        shapeModifierContents ??= [];
+        shapeModifierContents.add(content);
       }
     }
+    _shapeAnimation.setShapeModifiers(shapeModifierContents);
   }
 
   @override

lib/src/animation/content/shape_modifier_content.dart

@@ -0,0 +1,6 @@
+import '../../model/content/shape_data.dart';
+import 'content.dart';
+
+abstract class ShapeModifierContent extends Content {
+  ShapeData modifyShape(ShapeData shapeData);
+}

lib/src/animation/keyframe/drop_shadow_keyframe_animation.dart

@@ -10,7 +10,7 @@ import 'base_keyframe_animation.dart';
 import 'color_keyframe_animation.dart';
 
 class DropShadowKeyframeAnimation {
-  static final double _degToRad = math.pi / 180.0;
+  static const double _degToRad = math.pi / 180.0;
 
   final void Function() listener;
   late final ColorKeyframeAnimation _color;

lib/src/animation/keyframe/shape_keyframe_animation.dart

@@ -3,11 +3,13 @@ import '../../model/content/shape_data.dart';
 import '../../utils/misc.dart';
 import '../../utils/path_factory.dart';
 import '../../value/keyframe.dart';
+import '../content/shape_modifier_content.dart';
 import 'base_keyframe_animation.dart';
 
 class ShapeKeyframeAnimation extends BaseKeyframeAnimation<ShapeData, Path> {
   final ShapeData _tempShapeData = ShapeData.empty();
   final Path _tempPath = PathFactory.create();
+  List<ShapeModifierContent>? _shapeModifiers;
 
   ShapeKeyframeAnimation(List<Keyframe<ShapeData>> keyframes)
       : super(keyframes);
@@ -19,7 +21,18 @@ class ShapeKeyframeAnimation extends BaseKeyframeAnimation<ShapeData, Path> {
 
     _tempShapeData.interpolateBetween(
         startShapeData, endShapeData, keyframeProgress);
-    MiscUtils.getPathFromData(_tempShapeData, _tempPath);
+    var modifiedShapeData = _tempShapeData;
+    var shapeModifiers = _shapeModifiers;
+    if (shapeModifiers != null) {
+      for (var i = shapeModifiers.length - 1; i >= 0; i--) {
+        modifiedShapeData = shapeModifiers[i].modifyShape(modifiedShapeData);
+      }
+    }
+    MiscUtils.getPathFromData(modifiedShapeData, _tempPath);
     return _tempPath;
   }
+
+  void setShapeModifiers(List<ShapeModifierContent>? shapeModifiers) {
+    _shapeModifiers = shapeModifiers;
+  }
 }

lib/src/animation/keyframe/text_keyframe_animation.dart

@@ -1,5 +1,7 @@
 import '../../model/document_data.dart';
 import '../../value/keyframe.dart';
+import '../../value/lottie_frame_info.dart';
+import '../../value/lottie_value_callback.dart';
 import 'keyframe_animation.dart';
 
 class TextKeyframeAnimation extends KeyframeAnimation<DocumentData> {
@@ -9,10 +11,58 @@ class TextKeyframeAnimation extends KeyframeAnimation<DocumentData> {
   @override
   DocumentData getValue(
       Keyframe<DocumentData> keyframe, double keyframeProgress) {
-    if (keyframeProgress != 1.0 || keyframe.endValue == null) {
+    var valueCallback = this.valueCallback;
+    if (valueCallback != null) {
+      return valueCallback.getValueInternal(
+          keyframe.startFrame,
+          keyframe.endFrame ?? double.maxFinite,
+          keyframe.startValue,
+          keyframe.endValue ?? keyframe.startValue,
+          keyframeProgress,
+          getInterpolatedCurrentKeyframeProgress(),
+          progress)!;
+    } else if (keyframeProgress != 1.0 || keyframe.endValue == null) {
       return keyframe.startValue!;
     } else {
       return keyframe.endValue!;
     }
   }
+
+  void setStringValueCallback(LottieValueCallback<String> valueCallback) {
+    super.setValueCallback(_DocumentDataValueCallback(valueCallback));
+  }
+}
+
+class _DocumentDataValueCallback extends LottieValueCallback<DocumentData> {
+  final LottieValueCallback<String> valueCallback;
+
+  _DocumentDataValueCallback(this.valueCallback) : super(null);
+
+  @override
+  DocumentData getValue(LottieFrameInfo<DocumentData> frameInfo) {
+    var stringFrameInfo = LottieFrameInfo<String>(
+        frameInfo.startFrame,
+        frameInfo.endFrame,
+        frameInfo.startValue!.text,
+        frameInfo.endValue!.text,
+        frameInfo.linearKeyframeProgress,
+        frameInfo.interpolatedKeyframeProgress,
+        frameInfo.overallProgress);
+    var text = valueCallback.getValue(stringFrameInfo)!;
+    var baseDocumentData = frameInfo.interpolatedKeyframeProgress == 1
+        ? 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);
+  }
 }

lib/src/lottie.dart

@@ -1,13 +1,9 @@
 import 'dart:typed_data';
-import 'package:flutter/services.dart';
 import 'package:flutter/widgets.dart';
 import '../lottie.dart';
 import 'composition.dart';
-import 'frame_rate.dart';
 import 'l.dart';
 import 'lottie_builder.dart';
-import 'options.dart';
-import 'providers/load_image.dart';
 
 /// A widget to display a loaded [LottieComposition].
 /// The [controller] property allows to specify a custom AnimationController that

lib/src/lottie_builder.dart

@@ -1,12 +1,12 @@
 import 'dart:async';
 import 'dart:typed_data';
 import 'package:flutter/foundation.dart';
-import 'package:flutter/services.dart';
 import 'package:flutter/widgets.dart';
-import '../lottie.dart';
 import 'composition.dart';
 import 'frame_rate.dart';
 import 'lottie.dart';
+import 'lottie_delegates.dart';
+import 'options.dart';
 import 'providers/asset_provider.dart';
 import 'providers/file_provider.dart';
 import 'providers/load_image.dart';

lib/src/lottie_delegates.dart

@@ -1,7 +1,8 @@
 import 'dart:ui' as ui;
 import 'package:flutter/widgets.dart';
-import '../lottie.dart';
+import 'composition.dart';
 import 'lottie_drawable.dart';
+import 'lottie_image_asset.dart';
 import 'value_delegate.dart';
 
 // TODO(xha): recognize style Bold, Medium, Regular, SemiBold, etc...

lib/src/lottie_drawable.dart

@@ -1,6 +1,5 @@
 import 'dart:ui' as ui;
 import 'package:flutter/rendering.dart';
-import 'package:vector_math/vector_math_64.dart';
 import 'composition.dart';
 import 'frame_rate.dart';
 import 'lottie_delegates.dart';

lib/src/lottie_property.dart

@@ -129,8 +129,12 @@ abstract class LottieProperty {
   static const dropShadow = DropShadow(
       color: Color(0x00000000), direction: 0, distance: 0, radius: 0);
 
+  /// Set the color filter for an entire drawable content. Can be applied to fills, strokes, images, and solids.
   static const ColorFilter colorFilter =
       ColorFilter.mode(Color(0xFF000000), BlendMode.dst);
 
   static final List<Color> gradientColor = [];
+
+  /// Replace the text for a text layer.
+  static const text = 'dynamic_text';
 }

lib/src/model/animatable/animatable_shape_value.dart

@@ -1,5 +1,4 @@
 import 'dart:ui';
-import '../../animation/keyframe/base_keyframe_animation.dart';
 import '../../animation/keyframe/shape_keyframe_animation.dart';
 import '../../value/keyframe.dart';
 import '../content/shape_data.dart';
@@ -10,7 +9,7 @@ class AnimatableShapeValue extends BaseAnimatableValue<ShapeData, Path> {
       : super.fromKeyframes(keyframes);
 
   @override
-  BaseKeyframeAnimation<ShapeData, Path> createAnimation() {
+  ShapeKeyframeAnimation createAnimation() {
     return ShapeKeyframeAnimation(keyframes);
   }
 }

lib/src/model/content/polystar_shape.dart

@@ -37,6 +37,7 @@ class PolystarShape implements ContentModel {
   final AnimatableDoubleValue? innerRoundedness;
   final AnimatableDoubleValue outerRoundedness;
   final bool hidden;
+  final bool isReversed;
 
   PolystarShape({
     this.name,
@@ -49,6 +50,7 @@ class PolystarShape implements ContentModel {
     this.innerRoundedness,
     required this.outerRoundedness,
     required this.hidden,
+    required this.isReversed,
   });
 
   @override

lib/src/model/content/rounded_corners.dart

@@ -0,0 +1,18 @@
+import '../../animation/content/content.dart';
+import '../../animation/content/rounded_corners_content.dart';
+import '../../lottie_drawable.dart';
+import '../animatable/animatable_value.dart';
+import '../layer/base_layer.dart';
+import 'content_model.dart';
+
+class RoundedCorners implements ContentModel {
+  final String name;
+  final AnimatableValue<double, double> cornerRadius;
+
+  RoundedCorners(this.name, this.cornerRadius);
+
+  @override
+  Content toContent(LottieDrawable drawable, BaseLayer layer) {
+    return RoundedCornersContent(drawable, layer, this);
+  }
+}

lib/src/model/content/shape_data.dart

@@ -22,6 +22,10 @@ class ShapeData {
     return _initialPoint;
   }
 
+  void setClosed(bool closed) {
+    _closed = closed;
+  }
+
   bool get isClosed {
     return _closed;
   }

lib/src/model/cubic_curve_data.dart

@@ -1,7 +1,44 @@
 import 'dart:ui';
 
+/// One cubic path operation. CubicCurveData is structured such that it is easy to iterate through
+/// it and build a path. However, it is modeled differently than most path operations.
+///
+/// CubicCurveData
+/// |                     - vertex
+/// |                   /
+/// |    cp1          cp2
+/// |   /
+/// |  |
+/// | /
+/// --------------------------
+///
+/// When incrementally building a path, it will already have a "current point" so that is
+/// not captured in this data structure.
+/// The control points here represent {@link android.graphics.Path#cubicTo(float, float, float, float, float, float)}.
+///
+/// Most path operations are centered around a vertex and its in control point and out control point like this:
+/// |           outCp
+/// |          /
+/// |         |
+/// |         v
+/// |        /
+/// |      inCp
+/// --------------------------
 class CubicCurveData {
   Offset controlPoint1 = Offset.zero;
   Offset controlPoint2 = Offset.zero;
   Offset vertex = Offset.zero;
+
+  void setFrom(CubicCurveData curveData) {
+    vertex = Offset(curveData.vertex.dx, curveData.vertex.dy);
+    controlPoint1 =
+        Offset(curveData.controlPoint1.dx, curveData.controlPoint1.dy);
+    controlPoint2 =
+        Offset(curveData.controlPoint2.dx, curveData.controlPoint2.dy);
+  }
+
+  @override
+  String toString() {
+    return 'v=$vertex cp1$controlPoint1 cp2=$controlPoint2';
+  }
 }

lib/src/model/layer/base_layer.dart

@@ -2,7 +2,6 @@ import 'dart:math';
 import 'dart:ui' as ui;
 import 'package:flutter/foundation.dart';
 import 'package:flutter/rendering.dart' hide Layer;
-import 'package:vector_math/vector_math_64.dart';
 import '../../animation/content/content.dart';
 import '../../animation/content/drawing_content.dart';
 import '../../animation/keyframe/base_keyframe_animation.dart';

lib/src/model/layer/text_layer.dart

@@ -1,7 +1,5 @@
 import 'dart:ui';
-import 'package:characters/characters.dart';
 import 'package:flutter/widgets.dart';
-import 'package:vector_math/vector_math_64.dart';
 import '../../animation/content/content_group.dart';
 import '../../animation/keyframe/base_keyframe_animation.dart';
 import '../../animation/keyframe/text_keyframe_animation.dart';
@@ -486,6 +484,11 @@ class TextLayer extends BaseLayer {
           ..addUpdateListener(invalidateSelf);
         addAnimation(_textSizeCallbackAnimation);
       }
+    } else if (property == LottieProperty.text) {
+      if (callback != null) {
+        _textAnimation
+            .setStringValueCallback(callback as LottieValueCallback<String>);
+      }
     }
   }
 }

lib/src/parser/content_model_parser.dart

@@ -9,6 +9,7 @@ import 'moshi/json_reader.dart';
 import 'polysar_shape_parser.dart';
 import 'rectangle_shape_parser.dart';
 import 'repeat_parser.dart';
+import 'rounded_corners_parser.dart';
 import 'shape_fill_parser.dart';
 import 'shape_group_parser.dart';
 import 'shape_path_parser.dart';
@@ -80,7 +81,7 @@ class ContentModelParser {
         model = ShapeTrimPathParser.parse(reader, composition);
         break;
       case 'sr':
-        model = PolystarShapeParser.parse(reader, composition);
+        model = PolystarShapeParser.parse(reader, composition, d: d);
         break;
       case 'mm':
         model = MergePathsParser.parse(reader);
@@ -88,6 +89,9 @@ class ContentModelParser {
       case 'rp':
         model = RepeaterParser.parse(reader, composition);
         break;
+      case 'rd':
+        model = RoundedCornersParser.parse(reader, composition);
+        break;
       default:
         composition.addWarning('Unknown shape type $type');
     }

lib/src/parser/document_data_parser.dart

@@ -3,8 +3,19 @@ import '../model/document_data.dart';
 import 'json_utils.dart';
 import 'moshi/json_reader.dart';
 
-final JsonReaderOptions _names = JsonReaderOptions.of(
-    ['t', 'f', 's', 'j', 'tr', 'lh', 'ls', 'fc', 'sc', 'sw', 'of']);
+final JsonReaderOptions _names = JsonReaderOptions.of([
+  't', // 0
+  'f', // 1
+  's', // 2
+  'j', // 3
+  'tr', // 4
+  'lh', // 5
+  'ls', // 6
+  'fc', // 7
+  'sc', // 8
+  'sw', // 9
+  'of', // 10
+]);
 
 DocumentData documentDataParser(JsonReader reader, {required double scale}) {
   String? text;

lib/src/parser/gradient_color_parser.dart

@@ -37,6 +37,17 @@ class GradientColorParser {
     while (reader.hasNext()) {
       array.add(reader.nextDouble());
     }
+    if (array.length == 4 && array[0] == 1) {
+      // If a gradient color only contains one color at position 1, add a second stop with the same
+      // color at position 0. Android's LinearGradient shader requires at least two colors.
+      // https://github.com/airbnb/lottie-android/issues/1967
+      array[0] = 0;
+      array.add(1);
+      array.add(array[1]);
+      array.add(array[2]);
+      array.add(array[3]);
+      _colorPoints = 2;
+    }
     if (isArray) {
       reader.endArray();
     }

lib/src/parser/keyframe_parser.dart

@@ -13,7 +13,7 @@ class KeyframeParser {
   /// PathInterpolator fails to create the interpolator in those cases and hangs.
   /// Clamping the cp helps prevent that.
   static const _maxCpValue = 100.0;
-  static final _linearInterpolator = Curves.linear;
+  static const _linearInterpolator = Curves.linear;
   static final _pathInterpolatorCache = <int, Curve>{};
 
   static final JsonReaderOptions _names =

lib/src/parser/polysar_shape_parser.dart

@@ -9,11 +9,12 @@ import 'moshi/json_reader.dart';
 
 class PolystarShapeParser {
   static final JsonReaderOptions _names = JsonReaderOptions.of(
-      ['nm', 'sy', 'pt', 'p', 'r', 'or', 'os', 'ir', 'is', 'hd']);
+      ['nm', 'sy', 'pt', 'p', 'r', 'or', 'os', 'ir', 'is', 'hd', 'd']);
 
   PolystarShapeParser._();
 
-  static PolystarShape parse(JsonReader reader, LottieComposition composition) {
+  static PolystarShape parse(JsonReader reader, LottieComposition composition,
+      {required int d}) {
     String? name;
     PolystarShapeType? type;
     late AnimatableDoubleValue points;
@@ -24,6 +25,7 @@ class PolystarShapeParser {
     AnimatableDoubleValue? innerRadius;
     AnimatableDoubleValue? innerRoundedness;
     var hidden = false;
+    var reversed = d == 3;
 
     while (reader.hasNext()) {
       switch (reader.selectName(_names)) {
@@ -64,6 +66,10 @@ class PolystarShapeParser {
         case 9:
           hidden = reader.nextBoolean();
           break;
+        case 10:
+          // "d" is 2 for normal and 3 for reversed.
+          reversed = reader.nextInt() == 3;
+          break;
         default:
           reader.skipName();
           reader.skipValue();
@@ -81,6 +87,7 @@ class PolystarShapeParser {
       innerRoundedness: innerRoundedness,
       outerRoundedness: outerRoundedness,
       hidden: hidden,
+      isReversed: reversed,
     );
   }
 }

lib/src/parser/rounded_corners_parser.dart

@@ -0,0 +1,39 @@
+import '../composition.dart';
+import '../model/animatable/animatable_value.dart';
+import '../model/content/rounded_corners.dart';
+import 'animatable_value_parser.dart';
+import 'moshi/json_reader.dart';
+
+class RoundedCornersParser {
+  static final _names = JsonReaderOptions.of([
+    'nm', // 0
+    'r', // 1
+    'hd' // 1
+  ]);
+
+  static RoundedCorners? parse(
+      JsonReader reader, LottieComposition composition) {
+    String? name;
+    AnimatableValue<double, double>? cornerRadius;
+    var hidden = false;
+
+    while (reader.hasNext()) {
+      switch (reader.selectName(_names)) {
+        case 0: //nm
+          name = reader.nextString();
+          break;
+        case 1: // r
+          cornerRadius =
+              AnimatableValueParser.parseFloat(reader, composition, isDp: true);
+          break;
+        case 2: // hd
+          hidden = reader.nextBoolean();
+          break;
+        default:
+          reader.skipValue();
+      }
+    }
+
+    return hidden ? null : RoundedCorners(name!, cornerRadius!);
+  }
+}

lib/src/raw_lottie.dart

@@ -1,8 +1,10 @@
 import 'package:flutter/rendering.dart';
 import 'package:flutter/widgets.dart';
-import '../lottie.dart';
+import 'composition.dart';
 import 'frame_rate.dart';
+import 'lottie_delegates.dart';
 import 'lottie_drawable.dart';
+import 'options.dart';
 import 'render_lottie.dart';
 
 /// A widget that displays a [LottieDrawable] directly.

lib/src/render_lottie.dart

@@ -1,6 +1,7 @@
 import 'package:flutter/rendering.dart';
-import '../lottie.dart';
+import 'composition.dart';
 import 'frame_rate.dart';
+import 'lottie_delegates.dart';
 import 'lottie_drawable.dart';
 
 /// A Lottie animation in the render tree.

lib/src/utils.dart

@@ -1,5 +1,4 @@
 import 'dart:math';
-import 'dart:ui';
 import 'package:flutter/rendering.dart';
 import 'package:vector_math/vector_math_64.dart';
 

lib/src/value_delegate.dart

@@ -254,6 +254,11 @@ class ValueDelegate<T> {
           double? relative}) =>
       _double(keyPath, LottieProperty.textSize, value, callback, relative);
 
+  static ValueDelegate<String> text(List<String> keyPath,
+          {String? value,
+          String Function(LottieFrameInfo<String>)? callback}) =>
+      ValueDelegate._(keyPath, LottieProperty.text, value, callback);
+
   static ValueDelegate<ColorFilter> colorFilter(List<String> keyPath,
           {ColorFilter? value,
           ColorFilter Function(LottieFrameInfo<ColorFilter>)? callback}) =>

pubspec.lock

@@ -7,21 +7,21 @@ packages:
       name: _fe_analyzer_shared
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "26.0.0"
+    version: "38.0.0"
   analyzer:
     dependency: "direct dev"
     description:
       name: analyzer
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.3.0"
+    version: "3.4.1"
   archive:
     dependency: "direct main"
     description:
       name: archive
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.1.2"
+    version: "3.3.0"
   args:
     dependency: transitive
     description:
@@ -35,7 +35,7 @@ packages:
       name: async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.8.1"
+    version: "2.8.2"
   boolean_selector:
     dependency: transitive
     description:
@@ -49,7 +49,7 @@ packages:
       name: build
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0"
+    version: "2.2.2"
   build_config:
     dependency: transitive
     description:
@@ -63,28 +63,28 @@ packages:
       name: build_daemon
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.0.0"
+    version: "3.0.1"
   build_resolvers:
     dependency: transitive
     description:
       name: build_resolvers
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.4"
+    version: "2.0.7"
   build_runner:
     dependency: "direct dev"
     description:
       name: build_runner
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.2"
+    version: "2.1.8"
   build_runner_core:
     dependency: transitive
     description:
       name: build_runner_core
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "7.1.0"
+    version: "7.2.3"
   built_collection:
     dependency: transitive
     description:
@@ -98,14 +98,14 @@ packages:
       name: built_value
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "8.1.2"
+    version: "8.1.4"
   characters:
-    dependency: "direct main"
+    dependency: transitive
     description:
       name: characters
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0"
+    version: "1.2.0"
   charcode:
     dependency: transitive
     description:
@@ -120,13 +120,6 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.0.1"
-  cli_util:
-    dependency: transitive
-    description:
-      name: cli_util
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.3.3"
   clock:
     dependency: transitive
     description:
@@ -168,7 +161,7 @@ packages:
       name: dart_style
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0"
+    version: "2.2.2"
   fake_async:
     dependency: transitive
     description:
@@ -220,7 +213,7 @@ packages:
       name: glob
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.1"
+    version: "2.0.2"
   graphs:
     dependency: transitive
     description:
@@ -234,7 +227,7 @@ packages:
       name: http_multi_server
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.0.1"
+    version: "3.2.0"
   http_parser:
     dependency: transitive
     description:
@@ -255,14 +248,14 @@ packages:
       name: js
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.6.3"
+    version: "0.6.4"
   json_annotation:
     dependency: transitive
     description:
       name: json_annotation
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "4.0.1"
+    version: "4.4.0"
   lints:
     dependency: transitive
     description:
@@ -283,7 +276,14 @@ packages:
       name: matcher
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.12.10"
+    version: "0.12.11"
+  material_color_utilities:
+    dependency: transitive
+    description:
+      name: material_color_utilities
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.1.3"
   meta:
     dependency: transitive
     description:
@@ -297,7 +297,7 @@ packages:
       name: mime
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.0"
+    version: "1.0.1"
   package_config:
     dependency: transitive
     description:
@@ -312,13 +312,6 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.8.0"
-  pedantic:
-    dependency: transitive
-    description:
-      name: pedantic
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.11.1"
   pool:
     dependency: transitive
     description:
@@ -332,21 +325,21 @@ packages:
       name: pub_semver
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0"
+    version: "2.1.1"
   pubspec_parse:
     dependency: transitive
     description:
       name: pubspec_parse
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.0"
+    version: "1.2.0"
   shelf:
     dependency: transitive
     description:
       name: shelf
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0"
+    version: "1.3.0"
   shelf_web_socket:
     dependency: transitive
     description:
@@ -407,7 +400,7 @@ packages:
       name: test_api
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.4.2"
+    version: "0.4.8"
   timing:
     dependency: transitive
     description:
@@ -428,14 +421,14 @@ packages:
       name: vector_math
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0"
+    version: "2.1.1"
   watcher:
     dependency: transitive
     description:
       name: watcher
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.0"
+    version: "1.0.1"
   web_socket_channel:
     dependency: transitive
     description:
@@ -451,4 +444,5 @@ packages:
     source: hosted
     version: "3.1.0"
 sdks:
-  dart: ">=2.12.0 <3.0.0"
+  dart: ">=2.16.0 <3.0.0"
+  flutter: ">=2.10.0"

pubspec.yaml

@@ -1,14 +1,14 @@
 name: lottie
 description: Render After Effects animations natively on Flutter. This package is a pure Dart implementation of a Lottie player.
-version: 1.2.1
+version: 1.3.0
 homepage: https://github.com/xvrh/lottie-flutter
 
 environment:
   sdk: '>=2.12.0 <3.0.0'
+  flutter: '>=2.10.0'
 
 dependencies:
   archive: ^3.0.0
-  characters: ^1.1.0
   flutter:
     sdk: flutter
   path: ^1.8.0

test/dynamic_properties_test.dart

@@ -1,7 +1,6 @@
 import 'dart:io';
 import 'dart:ui';
 import 'package:flutter/material.dart';
-import 'package:flutter/painting.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:lottie/lottie.dart';
 import 'utils.dart';

test/dynamic_text_test.dart

@@ -2,27 +2,83 @@ import 'dart:io';
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:lottie/lottie.dart';
+import 'utils.dart';
 
 void main() {
-  testWidgets('Dynamic test', (tester) async {
-    var composition = await LottieComposition.fromBytes(
+  late LottieComposition composition;
+
+  setUpAll(() async {
+    composition = await LottieComposition.fromBytes(
         File('example/assets/Tests/DynamicText.json').readAsBytesSync());
-
-    await tester.pumpWidget(
-      MaterialApp(
-        home: Lottie(
-          composition: composition,
-          animate: false,
-          delegates: LottieDelegates(
-              text: (input) => '🔥c️🔥👮🏿‍🔥',
-              textStyle: (font) => const TextStyle(
-                  fontFamily: 'Roboto', fontFamilyFallback: ['Noto Emoji']),
-              values: const []),
-        ),
-      ),
-    );
-
-    await expectLater(
-        find.byType(Lottie), matchesGoldenFile('goldens/dynamic_text.png'));
   });
+
+  void testGolden(String description, LottieDelegates delegates) async {
+    var screenshotName = description
+        .toLowerCase()
+        .replaceAll(RegExp('[^a-z0-9 ]'), '')
+        .replaceAll(' ', '_');
+
+    var size = const Size(500, 400);
+    testWidgets(description, (tester) async {
+      await tester.pumpWidget(
+        MaterialApp(
+          home: FilmStrip(
+            composition,
+            delegates: delegates,
+            size: size,
+          ),
+        ),
+      );
+      await tester.pump();
+      await expectLater(find.byType(FilmStrip),
+          matchesGoldenFile('goldens/dynamic_text/$screenshotName.png'));
+    });
+  }
+
+  testGolden(
+      'Dynamic text delegate',
+      LottieDelegates(
+          text: (input) => '🔥c️🔥👮🏿‍🔥',
+          textStyle: (font) => const TextStyle(
+              fontFamily: 'Roboto', fontFamilyFallback: ['Noto Emoji']),
+          values: const []));
+
+  testGolden(
+    'Dynamic Text ValueDelegate',
+    LottieDelegates(values: [
+      ValueDelegate.text(['NAME'], value: 'Text with ValueDelegate')
+    ]),
+  );
+
+  testGolden(
+    'Dynamic Text ValueDelegate overallProgress',
+    LottieDelegates(values: [
+      ValueDelegate.text(['NAME'],
+          callback: (frame) => '${frame.overallProgress}')
+    ]),
+  );
+
+  testGolden(
+    'Dynamic Text ValueDelegate startValue',
+    LottieDelegates(values: [
+      ValueDelegate.text(['NAME'], callback: (frame) => '${frame.startValue}!!')
+    ]),
+  );
+
+  testGolden(
+    'Dynamic Text ValueDelegate endValue',
+    LottieDelegates(values: [
+      ValueDelegate.text(['NAME'], callback: (frame) => '${frame.endValue}!!')
+    ]),
+  );
+
+  testGolden(
+    'Dynamic Text Emoji',
+    LottieDelegates(
+        textStyle: (font) => const TextStyle(
+            fontFamily: 'Roboto', fontFamilyFallback: ['Noto Emoji']),
+        values: [
+          ValueDelegate.text(['NAME'], value: '🔥💪💯'),
+        ]),
+  );
 }

test/gradient_test.dart

@@ -1,5 +1,4 @@
 import 'dart:io';
-import 'dart:ui';
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:lottie/lottie.dart';