Allow missing end values for integer animations (#349)

CHANGELOG.md

@@ -1,3 +1,7 @@
+## 3.1.1
+- Fix rounding-off error on progress calculation
+- Allow missing end values for integer animations
+
 ## 3.1.0
 - Use `package:http` for `Lottie.network`. This allows to drop dependency on `dart:html` and be compatible with `wasm`.
 - Fix new lints

FUNDING.yml

@@ -0,0 +1,2 @@
+github: xvrh
+custom: https://buymeacoffee.com/xvrh

example/ios/Flutter/AppFrameworkInfo.plist

@@ -21,6 +21,6 @@
   <key>CFBundleVersion</key>
   <string>1.0</string>
   <key>MinimumOSVersion</key>
-  <string>11.0</string>
+  <string>12.0</string>
 </dict>
 </plist>

example/ios/Podfile

@@ -1,5 +1,5 @@
 # Uncomment this line to define a global platform for your project
-platform :ios, '11.0'
+platform :ios, '12.0'
 
 # CocoaPods analytics sends network stats synchronously affecting flutter build latency.
 ENV['COCOAPODS_DISABLE_STATS'] = 'true'

example/ios/Podfile.lock

@@ -15,9 +15,9 @@ EXTERNAL SOURCES:
     :path: ".symlinks/plugins/path_provider_foundation/darwin"
 
 SPEC CHECKSUMS:
-  Flutter: f04841e97a9d0b0a8025694d0796dd46242b2854
+  Flutter: e0871f40cf51350855a761d2e70bf5af5b9b5de7
-  path_provider_foundation: 29f094ae23ebbca9d3d0cec13889cd9060c0e943
+  path_provider_foundation: 3784922295ac71e43754bd15e0653ccfd36a147c
 
-PODFILE CHECKSUM: 7368163408c647b7eb699d0d788ba6718e18fb8d
+PODFILE CHECKSUM: 4e8f8b2be68aeea4c0d5beb6ff1e79fface1d048
 
-COCOAPODS: 1.14.2
+COCOAPODS: 1.15.2

example/ios/Runner.xcodeproj/project.pbxproj

@@ -163,7 +163,7 @@
 		97C146E61CF9000F007C117D /* Project object */ = {
 			isa = PBXProject;
 			attributes = {
-				LastUpgradeCheck = 1430;
+				LastUpgradeCheck = 1510;
 				ORGANIZATIONNAME = "";
 				TargetAttributes = {
 					97C146ED1CF9000F007C117D = {
@@ -351,7 +351,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 11.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				MTL_ENABLE_DEBUG_INFO = NO;
 				SDKROOT = iphoneos;
 				SUPPORTED_PLATFORMS = iphoneos;
@@ -366,8 +366,10 @@
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CLANG_ENABLE_MODULES = YES;
+				CODE_SIGN_IDENTITY = "Apple Development";
+				CODE_SIGN_STYLE = Automatic;
 				CURRENT_PROJECT_VERSION = "$(FLUTTER_BUILD_NUMBER)";
-				DEVELOPMENT_TEAM = TC6K7794M3;
+				DEVELOPMENT_TEAM = PS45A9TPZ7;
 				ENABLE_BITCODE = NO;
 				FRAMEWORK_SEARCH_PATHS = (
 					"$(inherited)",
@@ -382,8 +384,9 @@
 					"$(inherited)",
 					"$(PROJECT_DIR)/Flutter",
 				);
-				PRODUCT_BUNDLE_IDENTIFIER = com.github.xvrh.lottie.example;
+				PRODUCT_BUNDLE_IDENTIFIER = com.example;
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				PROVISIONING_PROFILE_SPECIFIER = "";
 				SWIFT_OBJC_BRIDGING_HEADER = "Runner/Runner-Bridging-Header.h";
 				SWIFT_VERSION = 5.0;
 				VERSIONING_SYSTEM = "apple-generic";
@@ -437,7 +440,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 11.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				MTL_ENABLE_DEBUG_INFO = YES;
 				ONLY_ACTIVE_ARCH = YES;
 				SDKROOT = iphoneos;
@@ -486,7 +489,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 11.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				MTL_ENABLE_DEBUG_INFO = NO;
 				SDKROOT = iphoneos;
 				SUPPORTED_PLATFORMS = iphoneos;
@@ -502,8 +505,10 @@
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CLANG_ENABLE_MODULES = YES;
+				CODE_SIGN_IDENTITY = "Apple Development";
+				CODE_SIGN_STYLE = Automatic;
 				CURRENT_PROJECT_VERSION = "$(FLUTTER_BUILD_NUMBER)";
-				DEVELOPMENT_TEAM = TC6K7794M3;
+				DEVELOPMENT_TEAM = PS45A9TPZ7;
 				ENABLE_BITCODE = NO;
 				FRAMEWORK_SEARCH_PATHS = (
 					"$(inherited)",
@@ -518,8 +523,9 @@
 					"$(inherited)",
 					"$(PROJECT_DIR)/Flutter",
 				);
-				PRODUCT_BUNDLE_IDENTIFIER = com.github.xvrh.lottie.example;
+				PRODUCT_BUNDLE_IDENTIFIER = com.example;
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				PROVISIONING_PROFILE_SPECIFIER = "";
 				SWIFT_OBJC_BRIDGING_HEADER = "Runner/Runner-Bridging-Header.h";
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
 				SWIFT_VERSION = 5.0;
@@ -533,8 +539,10 @@
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CLANG_ENABLE_MODULES = YES;
+				CODE_SIGN_IDENTITY = "Apple Development";
+				CODE_SIGN_STYLE = Automatic;
 				CURRENT_PROJECT_VERSION = "$(FLUTTER_BUILD_NUMBER)";
-				DEVELOPMENT_TEAM = TC6K7794M3;
+				DEVELOPMENT_TEAM = PS45A9TPZ7;
 				ENABLE_BITCODE = NO;
 				FRAMEWORK_SEARCH_PATHS = (
 					"$(inherited)",
@@ -549,8 +557,9 @@
 					"$(inherited)",
 					"$(PROJECT_DIR)/Flutter",
 				);
-				PRODUCT_BUNDLE_IDENTIFIER = com.github.xvrh.lottie.example;
+				PRODUCT_BUNDLE_IDENTIFIER = com.example;
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				PROVISIONING_PROFILE_SPECIFIER = "";
 				SWIFT_OBJC_BRIDGING_HEADER = "Runner/Runner-Bridging-Header.h";
 				SWIFT_VERSION = 5.0;
 				VERSIONING_SYSTEM = "apple-generic";

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

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1430"
+   LastUpgradeVersion = "1510"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"

example/macos/Podfile.lock

@@ -16,8 +16,8 @@ EXTERNAL SOURCES:
 
 SPEC CHECKSUMS:
   FlutterMacOS: 8f6f14fa908a6fb3fba0cd85dbd81ec4b251fb24
-  path_provider_foundation: 29f094ae23ebbca9d3d0cec13889cd9060c0e943
+  path_provider_foundation: 3784922295ac71e43754bd15e0653ccfd36a147c
 
 PODFILE CHECKSUM: 353c8bcc5d5b0994e508d035b5431cfe18c1dea7
 
-COCOAPODS: 1.14.2
+COCOAPODS: 1.15.2

example/macos/Runner.xcodeproj/project.pbxproj

@@ -203,7 +203,7 @@
 			isa = PBXProject;
 			attributes = {
 				LastSwiftUpdateCheck = 0920;
-				LastUpgradeCheck = 1430;
+				LastUpgradeCheck = 1510;
 				ORGANIZATIONNAME = "The Flutter Authors";
 				TargetAttributes = {
 					33CC10EC2044A3C60003C045 = {

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

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1430"
+   LastUpgradeVersion = "1510"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"

example/pubspec.lock

@@ -5,10 +5,10 @@ packages:
     dependency: transitive
     description:
       name: archive
-      sha256: "22600aa1e926be775fa5fe7e6894e7fb3df9efda8891c73f70fb3262399a432d"
+      sha256: ecf4273855368121b1caed0d10d4513c7241dfc813f7d3c8933b36622ae9b265
       url: "https://pub.dev"
     source: hosted
-    version: "3.4.10"
+    version: "3.5.1"
   async:
     dependency: transitive
     description:
@@ -98,10 +98,10 @@ packages:
     dependency: "direct dev"
     description:
       name: flutter_lints
-      sha256: e2a421b7e59244faef694ba7b30562e489c2b489866e505074eb005cd7060db7
+      sha256: "3f41d009ba7172d5ff9be5f6e6e6abb4300e263aab8866d2a0842ed2a70f8f0c"
       url: "https://pub.dev"
     source: hosted
-    version: "3.0.1"
+    version: "4.0.0"
   flutter_test:
     dependency: "direct dev"
     description: flutter
@@ -123,14 +123,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "4.0.2"
-  js:
-    dependency: transitive
-    description:
-      name: js
-      sha256: c1b2e9b5ea78c45e1a0788d29606ba27dc5f71f019f32ca5140f61ef071838cf
-      url: "https://pub.dev"
-    source: hosted
-    version: "0.7.1"
   leak_tracker:
     dependency: transitive
     description:
@@ -159,10 +151,10 @@ packages:
     dependency: transitive
     description:
       name: lints
-      sha256: cbf8d4b858bb0134ef3ef87841abdf8d63bfc255c266b7bf6b39daa1085c4290
+      sha256: "976c774dd944a42e83e2467f4cc670daef7eed6295b10b36ae8c85bcbf828235"
       url: "https://pub.dev"
     source: hosted
-    version: "3.0.0"
+    version: "4.0.0"
   logging:
     dependency: "direct main"
     description:
@@ -177,7 +169,7 @@ packages:
       path: ".."
       relative: true
     source: path
-    version: "3.1.0"
+    version: "3.1.1"
   matcher:
     dependency: transitive
     description:
@@ -222,26 +214,26 @@ packages:
     dependency: "direct main"
     description:
       name: path_provider
-      sha256: b27217933eeeba8ff24845c34003b003b2b22151de3c908d0e679e8fe1aa078b
+      sha256: c9e7d3a4cd1410877472158bee69963a4579f78b68c65a2b7d40d1a7a88bb161
       url: "https://pub.dev"
     source: hosted
-    version: "2.1.2"
+    version: "2.1.3"
   path_provider_android:
     dependency: transitive
     description:
       name: path_provider_android
-      sha256: "477184d672607c0a3bf68fbbf601805f92ef79c82b64b4d6eb318cbca4c48668"
+      sha256: a248d8146ee5983446bf03ed5ea8f6533129a12b11f12057ad1b4a67a2b3b41d
       url: "https://pub.dev"
     source: hosted
-    version: "2.2.2"
+    version: "2.2.4"
   path_provider_foundation:
     dependency: transitive
     description:
       name: path_provider_foundation
-      sha256: "5a7999be66e000916500be4f15a3633ebceb8302719b47b9cc49ce924125350f"
+      sha256: f234384a3fdd67f989b4d54a5d73ca2a6c422fa55ae694381ae0f4375cd1ea16
       url: "https://pub.dev"
     source: hosted
-    version: "2.3.2"
+    version: "2.4.0"
   path_provider_linux:
     dependency: transitive
     description:
@@ -282,14 +274,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.1.8"
-  pointycastle:
-    dependency: transitive
-    description:
-      name: pointycastle
-      sha256: "43ac87de6e10afabc85c445745a7b799e04de84cebaa4fd7bf55a5e1e9604d29"
-      url: "https://pub.dev"
-    source: hosted
-    version: "3.7.4"
   shelf:
     dependency: "direct dev"
     description:
@@ -387,18 +371,18 @@ packages:
     dependency: transitive
     description:
       name: web
-      sha256: "1d9158c616048c38f712a6646e317a3426da10e884447626167240d45209cbad"
+      sha256: "97da13628db363c635202ad97068d47c5b8aa555808e7a9411963c533b449b27"
       url: "https://pub.dev"
     source: hosted
-    version: "0.5.0"
+    version: "0.5.1"
   win32:
     dependency: transitive
     description:
       name: win32
-      sha256: "464f5674532865248444b4c3daca12bd9bf2d7c47f759ce2617986e7229494a8"
+      sha256: "0eaf06e3446824099858367950a813472af675116bf63f008a4c2a75ae13e9cb"
       url: "https://pub.dev"
     source: hosted
-    version: "5.2.0"
+    version: "5.5.0"
   xdg_directories:
     dependency: transitive
     description:
@@ -409,4 +393,4 @@ packages:
     version: "1.0.4"
 sdks:
   dart: ">=3.3.0 <4.0.0"
-  flutter: ">=3.16.0"
+  flutter: ">=3.16.6"

lib/src/animation/keyframe/integer_keyframe_animation.dart

@@ -7,16 +7,18 @@ class IntegerKeyframeAnimation extends KeyframeAnimation<int> {
 
   @override
   int getValue(Keyframe<int> keyframe, double keyframeProgress) {
-    if (keyframe.startValue == null || keyframe.endValue == null) {
+    if (keyframe.startValue == null) {
       throw Exception('Missing values for keyframe.');
     }
 
+    var endValue = keyframe.endValue ?? keyframe.startValue;
+
     if (valueCallback != null) {
       var value = valueCallback!.getValueInternal(
           keyframe.startFrame,
           keyframe.endFrame,
           keyframe.startValue,
-          keyframe.endValue,
+          endValue,
           keyframeProgress,
           getLinearCurrentKeyframeProgress(),
           progress);
@@ -25,7 +27,6 @@ class IntegerKeyframeAnimation extends KeyframeAnimation<int> {
       }
     }
 
-    return lerpDouble(keyframe.startValue, keyframe.endValue, keyframeProgress)!
+    return lerpDouble(keyframe.startValue, endValue, keyframeProgress)!.round();
-        .round();
   }
 }

pubspec.lock

@@ -21,18 +21,18 @@ packages:
     dependency: "direct main"
     description:
       name: archive
-      sha256: "22600aa1e926be775fa5fe7e6894e7fb3df9efda8891c73f70fb3262399a432d"
+      sha256: ecf4273855368121b1caed0d10d4513c7241dfc813f7d3c8933b36622ae9b265
       url: "https://pub.dev"
     source: hosted
-    version: "3.4.10"
+    version: "3.5.1"
   args:
     dependency: transitive
     description:
       name: args
-      sha256: eef6c46b622e0494a36c5a12d10d77fb4e855501a91c1b9ef9339326e58f0596
+      sha256: "7cf60b9f0cc88203c5a190b4cd62a99feea42759a7fa695010eb5de1c0b2252a"
       url: "https://pub.dev"
     source: hosted
-    version: "2.4.2"
+    version: "2.5.0"
   async:
     dependency: transitive
     description:
@@ -93,10 +93,10 @@ packages:
     dependency: "direct dev"
     description:
       name: dart_style
-      sha256: "40ae61a5d43feea6d24bd22c0537a6629db858963b99b4bc1c3db80676f32368"
+      sha256: "99e066ce75c89d6b29903d788a7bb9369cf754f7b24bf70bf4b6d6d6b26853b9"
       url: "https://pub.dev"
     source: hosted
-    version: "2.3.4"
+    version: "2.3.6"
   fake_async:
     dependency: transitive
     description:
@@ -122,10 +122,10 @@ packages:
     dependency: "direct dev"
     description:
       name: flutter_lints
-      sha256: e2a421b7e59244faef694ba7b30562e489c2b489866e505074eb005cd7060db7
+      sha256: "3f41d009ba7172d5ff9be5f6e6e6abb4300e263aab8866d2a0842ed2a70f8f0c"
       url: "https://pub.dev"
     source: hosted
-    version: "3.0.1"
+    version: "4.0.0"
   flutter_test:
     dependency: "direct dev"
     description: flutter
@@ -155,14 +155,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "4.0.2"
-  js:
-    dependency: transitive
-    description:
-      name: js
-      sha256: c1b2e9b5ea78c45e1a0788d29606ba27dc5f71f019f32ca5140f61ef071838cf
-      url: "https://pub.dev"
-    source: hosted
-    version: "0.7.1"
   leak_tracker:
     dependency: transitive
     description:
@@ -191,10 +183,10 @@ packages:
     dependency: transitive
     description:
       name: lints
-      sha256: cbf8d4b858bb0134ef3ef87841abdf8d63bfc255c266b7bf6b39daa1085c4290
+      sha256: "976c774dd944a42e83e2467f4cc670daef7eed6295b10b36ae8c85bcbf828235"
       url: "https://pub.dev"
     source: hosted
-    version: "3.0.0"
+    version: "4.0.0"
   matcher:
     dependency: transitive
     description:
@@ -235,14 +227,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.9.0"
-  pointycastle:
-    dependency: transitive
-    description:
-      name: pointycastle
-      sha256: "43ac87de6e10afabc85c445745a7b799e04de84cebaa4fd7bf55a5e1e9604d29"
-      url: "https://pub.dev"
-    source: hosted
-    version: "3.7.4"
   pub_semver:
     dependency: transitive
     description:
@@ -340,10 +324,10 @@ packages:
     dependency: transitive
     description:
       name: web
-      sha256: "1d9158c616048c38f712a6646e317a3426da10e884447626167240d45209cbad"
+      sha256: "97da13628db363c635202ad97068d47c5b8aa555808e7a9411963c533b449b27"
       url: "https://pub.dev"
     source: hosted
-    version: "0.5.0"
+    version: "0.5.1"
   yaml:
     dependency: "direct dev"
     description:

pubspec.yaml

@@ -1,10 +1,11 @@
 name: lottie
 description: Render After Effects animations natively on Flutter. This package is a pure Dart implementation of a Lottie player.
-version: 3.1.0
+version: 3.1.1
 repository: https://github.com/xvrh/lottie-flutter
 
 funding:
   - https://www.buymeacoffee.com/xvrh
+  - https://github.com/sponsors/xvrh
 
 environment:
   sdk: '^3.2.0'