[flutter] Wrap and expose AnimationStateData.

spine-flutter/example/lib/main.dart

@@ -80,6 +80,7 @@ class AnimationStateEvents extends StatelessWidget {
       controller.skeleton?.setScaleX(0.5);
       controller.skeleton?.setScaleY(0.5);
       controller.skeleton?.findSlot("gun")?.setColor(Color(1, 0, 0, 1));
+      controller.animationStateData?.setDefaultMix(0.2);
       controller.animationState?.setAnimation(0, "walk", true)?.setListener((type, trackEntry, event) {
         print("Walk animation event ${type}");
       });

spine-flutter/lib/spine_flutter.dart

@@ -2654,7 +2654,50 @@ class Event {
 typedef AnimationStateListener = void Function(EventType type, TrackEntry entry, Event? event);
 
 class AnimationStateData {
-  // FIXME
+  spine_animation_state_data _data;
+
+  AnimationStateData._(this._data);
+
+  SkeletonData getSkeletonData() {
+    return SkeletonData._(_bindings.spine_animation_state_data_get_skeleton_data(_data));
+  }
+
+  double getDefaultMix() {
+    return _bindings.spine_animation_state_data_get_default_mix(_data);
+  }
+
+  void setDefaultMix(double defaultMix) {
+    _bindings.spine_animation_state_data_set_default_mix(_data, defaultMix);
+  }
+
+  void setMixByName(String fromName, String toName, double duration) {
+    final fromNative = fromName.toNativeUtf8();
+    final toNative = toName.toNativeUtf8();
+    _bindings.spine_animation_state_data_set_mix_by_name(_data, fromNative.cast(), toNative.cast(), duration);
+    malloc.free(fromNative);
+    malloc.free(toNative);
+  }
+
+  double getMixByName(String fromName, String toName) {
+    final fromNative = fromName.toNativeUtf8();
+    final toNative = toName.toNativeUtf8();
+    final duration = _bindings.spine_animation_state_data_get_mix_by_name(_data, fromNative.cast(), toNative.cast());
+    malloc.free(fromNative);
+    malloc.free(toNative);
+    return duration;
+  }
+
+  void setMix(Animation from, Animation to, double duration) {
+    _bindings.spine_animation_state_data_set_mix(_data, from._animation, to._animation, duration);
+  }
+
+  double getMix(Animation from, Animation to) {
+    return _bindings.spine_animation_state_data_get_mix(_data, from._animation, to._animation);
+  }
+
+  void clear() {
+    _bindings.spine_animation_state_data_clear(_data);
+  }
 }
 
 class AnimationState {
@@ -2820,6 +2863,7 @@ class SkeletonDrawable {
   final SkeletonData skeletonData;
   late final Pointer<spine_skeleton_drawable> _drawable;
   late final Skeleton skeleton;
+  late final AnimationStateData animationStateData;
   late final AnimationState animationState;
   final bool _ownsAtlasAndSkeletonData;
   bool _disposed;
@@ -2827,6 +2871,7 @@ class SkeletonDrawable {
   SkeletonDrawable(this.atlas, this.skeletonData, this._ownsAtlasAndSkeletonData): _disposed = false {
     _drawable = _bindings.spine_skeleton_drawable_create(skeletonData._data);
     skeleton = Skeleton._(_drawable.ref.skeleton);
+    animationStateData = AnimationStateData._(_drawable.ref.animationStateData);
     animationState = AnimationState._(_drawable.ref.animationState, _drawable.ref.animationStateEvents);
   }
 

spine-flutter/lib/spine_flutter_bindings_generated.dart

@@ -873,6 +873,165 @@ class SpineFlutterBindings {
   late final _spine_animation_get_duration = _spine_animation_get_durationPtr
       .asFunction<double Function(spine_animation)>();
 
+  spine_skeleton_data spine_animation_state_data_get_skeleton_data(
+    spine_animation_state_data stateData,
+  ) {
+    return _spine_animation_state_data_get_skeleton_data(
+      stateData,
+    );
+  }
+
+  late final _spine_animation_state_data_get_skeleton_dataPtr = _lookup<
+          ffi.NativeFunction<
+              spine_skeleton_data Function(spine_animation_state_data)>>(
+      'spine_animation_state_data_get_skeleton_data');
+  late final _spine_animation_state_data_get_skeleton_data =
+      _spine_animation_state_data_get_skeleton_dataPtr.asFunction<
+          spine_skeleton_data Function(spine_animation_state_data)>();
+
+  double spine_animation_state_data_get_default_mix(
+    spine_animation_state_data stateData,
+  ) {
+    return _spine_animation_state_data_get_default_mix(
+      stateData,
+    );
+  }
+
+  late final _spine_animation_state_data_get_default_mixPtr = _lookup<
+          ffi.NativeFunction<ffi.Float Function(spine_animation_state_data)>>(
+      'spine_animation_state_data_get_default_mix');
+  late final _spine_animation_state_data_get_default_mix =
+      _spine_animation_state_data_get_default_mixPtr
+          .asFunction<double Function(spine_animation_state_data)>();
+
+  void spine_animation_state_data_set_default_mix(
+    spine_animation_state_data stateData,
+    double defaultMix,
+  ) {
+    return _spine_animation_state_data_set_default_mix(
+      stateData,
+      defaultMix,
+    );
+  }
+
+  late final _spine_animation_state_data_set_default_mixPtr = _lookup<
+      ffi.NativeFunction<
+          ffi.Void Function(spine_animation_state_data,
+              ffi.Float)>>('spine_animation_state_data_set_default_mix');
+  late final _spine_animation_state_data_set_default_mix =
+      _spine_animation_state_data_set_default_mixPtr
+          .asFunction<void Function(spine_animation_state_data, double)>();
+
+  void spine_animation_state_data_set_mix(
+    spine_animation_state_data stateData,
+    spine_animation from,
+    spine_animation to,
+    double duration,
+  ) {
+    return _spine_animation_state_data_set_mix(
+      stateData,
+      from,
+      to,
+      duration,
+    );
+  }
+
+  late final _spine_animation_state_data_set_mixPtr = _lookup<
+      ffi.NativeFunction<
+          ffi.Void Function(
+              spine_animation_state_data,
+              spine_animation,
+              spine_animation,
+              ffi.Float)>>('spine_animation_state_data_set_mix');
+  late final _spine_animation_state_data_set_mix =
+      _spine_animation_state_data_set_mixPtr.asFunction<
+          void Function(spine_animation_state_data, spine_animation,
+              spine_animation, double)>();
+
+  double spine_animation_state_data_get_mix(
+    spine_animation_state_data stateData,
+    spine_animation from,
+    spine_animation to,
+  ) {
+    return _spine_animation_state_data_get_mix(
+      stateData,
+      from,
+      to,
+    );
+  }
+
+  late final _spine_animation_state_data_get_mixPtr = _lookup<
+      ffi.NativeFunction<
+          ffi.Float Function(spine_animation_state_data, spine_animation,
+              spine_animation)>>('spine_animation_state_data_get_mix');
+  late final _spine_animation_state_data_get_mix =
+      _spine_animation_state_data_get_mixPtr.asFunction<
+          double Function(
+              spine_animation_state_data, spine_animation, spine_animation)>();
+
+  void spine_animation_state_data_set_mix_by_name(
+    spine_animation_state_data stateData,
+    ffi.Pointer<ffi.Int8> fromName,
+    ffi.Pointer<ffi.Int8> toName,
+    double duration,
+  ) {
+    return _spine_animation_state_data_set_mix_by_name(
+      stateData,
+      fromName,
+      toName,
+      duration,
+    );
+  }
+
+  late final _spine_animation_state_data_set_mix_by_namePtr = _lookup<
+      ffi.NativeFunction<
+          ffi.Void Function(
+              spine_animation_state_data,
+              ffi.Pointer<ffi.Int8>,
+              ffi.Pointer<ffi.Int8>,
+              ffi.Float)>>('spine_animation_state_data_set_mix_by_name');
+  late final _spine_animation_state_data_set_mix_by_name =
+      _spine_animation_state_data_set_mix_by_namePtr.asFunction<
+          void Function(spine_animation_state_data, ffi.Pointer<ffi.Int8>,
+              ffi.Pointer<ffi.Int8>, double)>();
+
+  double spine_animation_state_data_get_mix_by_name(
+    spine_animation_state_data stateData,
+    ffi.Pointer<ffi.Int8> fromName,
+    ffi.Pointer<ffi.Int8> toName,
+  ) {
+    return _spine_animation_state_data_get_mix_by_name(
+      stateData,
+      fromName,
+      toName,
+    );
+  }
+
+  late final _spine_animation_state_data_get_mix_by_namePtr = _lookup<
+          ffi.NativeFunction<
+              ffi.Float Function(spine_animation_state_data,
+                  ffi.Pointer<ffi.Int8>, ffi.Pointer<ffi.Int8>)>>(
+      'spine_animation_state_data_get_mix_by_name');
+  late final _spine_animation_state_data_get_mix_by_name =
+      _spine_animation_state_data_get_mix_by_namePtr.asFunction<
+          double Function(spine_animation_state_data, ffi.Pointer<ffi.Int8>,
+              ffi.Pointer<ffi.Int8>)>();
+
+  void spine_animation_state_data_clear(
+    spine_animation_state_data stateData,
+  ) {
+    return _spine_animation_state_data_clear(
+      stateData,
+    );
+  }
+
+  late final _spine_animation_state_data_clearPtr = _lookup<
+          ffi.NativeFunction<ffi.Void Function(spine_animation_state_data)>>(
+      'spine_animation_state_data_clear');
+  late final _spine_animation_state_data_clear =
+      _spine_animation_state_data_clearPtr
+          .asFunction<void Function(spine_animation_state_data)>();
+
   void spine_animation_state_update(
     spine_animation_state state,
     double delta,
@@ -8338,6 +8497,8 @@ class spine_path_constraint_data_wrapper extends ffi.Opaque {}
 
 class spine_animation_state_wrapper extends ffi.Opaque {}
 
+class spine_animation_state_data_wrapper extends ffi.Opaque {}
+
 class spine_animation_state_events_wrapper extends ffi.Opaque {}
 
 class spine_event_wrapper extends ffi.Opaque {}
@@ -8496,6 +8657,8 @@ class spine_skeleton_drawable extends ffi.Struct {
 
   external spine_animation_state animationState;
 
+  external spine_animation_state_data animationStateData;
+
   external spine_animation_state_events animationStateEvents;
 
   external ffi.Pointer<ffi.Void> clipping;
@@ -8505,6 +8668,8 @@ class spine_skeleton_drawable extends ffi.Struct {
 
 typedef spine_skeleton = ffi.Pointer<spine_skeleton_wrapper>;
 typedef spine_animation_state = ffi.Pointer<spine_animation_state_wrapper>;
+typedef spine_animation_state_data
+    = ffi.Pointer<spine_animation_state_data_wrapper>;
 typedef spine_animation_state_events
     = ffi.Pointer<spine_animation_state_events_wrapper>;
 

spine-flutter/lib/spine_widget.dart

@@ -29,6 +29,7 @@ class SpineWidgetController {
 
   Atlas? get atlas => _atlas;
   SkeletonData? get skeletonData => _data;
+  AnimationStateData? get animationStateData => _drawable?.animationStateData;
   AnimationState? get animationState => _drawable?.animationState;
   Skeleton? get skeleton => _drawable?.skeleton;
 }

spine-flutter/src/spine_flutter.cpp

@@ -370,7 +370,9 @@ void spine_render_command_dispose(spine_render_command *cmd) {
 FFI_PLUGIN_EXPORT spine_skeleton_drawable *spine_skeleton_drawable_create(spine_skeleton_data skeletonData) {
     spine_skeleton_drawable *drawable = SpineExtension::calloc<spine_skeleton_drawable>(1, __FILE__, __LINE__);
     drawable->skeleton = (spine_skeleton)new (__FILE__, __LINE__) Skeleton((SkeletonData*)skeletonData);
-    AnimationState *state = new (__FILE__, __LINE__) AnimationState(new AnimationStateData((SkeletonData*)skeletonData));
+    AnimationStateData *stateData = new (__FILE__, __LINE__) AnimationStateData((SkeletonData*)skeletonData);
+    drawable->animationStateData = (spine_animation_state_data)stateData;
+    AnimationState *state = new (__FILE__, __LINE__) AnimationState(stateData);
     drawable->animationState = (spine_animation_state)state;
     state->setManualTrackEntryDisposal(true);
     EventListener *listener =  new EventListener();
@@ -383,11 +385,8 @@ FFI_PLUGIN_EXPORT spine_skeleton_drawable *spine_skeleton_drawable_create(spine_
 FFI_PLUGIN_EXPORT void spine_skeleton_drawable_dispose(spine_skeleton_drawable *drawable) {
     if (!drawable) return;
     if (drawable->skeleton) delete (Skeleton*)drawable->skeleton;
-    if (drawable->animationState) {
-        AnimationState *state = (AnimationState*)drawable->animationState;
-        delete state->getData();
-        delete (AnimationState*)state;
-    }
+    if (drawable->animationState) delete (AnimationState*)drawable->animationState;
+    if (drawable->animationStateData) delete (AnimationStateData*)drawable->animationStateData;
     if (drawable->animationStateEvents) delete (Vector<AnimationStateEvent>*)(drawable->animationStateEvents);
     if (drawable->clipping) delete (SkeletonClipping*)drawable->clipping;
     while (drawable->renderCommand) {
@@ -532,8 +531,62 @@ FFI_PLUGIN_EXPORT float spine_animation_get_duration(spine_animation animation)
     return _animation->getDuration();
 }
 
-// AnimationState
+// AnimationStateData
+FFI_PLUGIN_EXPORT spine_skeleton_data spine_animation_state_data_get_skeleton_data(spine_animation_state_data stateData) {
+    if (stateData == nullptr) return nullptr;
+    AnimationStateData* _stateData = (AnimationStateData*)stateData;
+    return (spine_skeleton_data)_stateData->getSkeletonData();
+}
 
+FFI_PLUGIN_EXPORT float spine_animation_state_data_get_default_mix(spine_animation_state_data stateData) {
+    if (stateData == nullptr) return 0;
+    AnimationStateData* _stateData = (AnimationStateData*)stateData;
+    return _stateData->getDefaultMix();
+}
+
+FFI_PLUGIN_EXPORT void spine_animation_state_data_set_default_mix(spine_animation_state_data stateData, float defaultMix) {
+    if (stateData == nullptr) return;
+    AnimationStateData* _stateData = (AnimationStateData*)stateData;
+    _stateData->setDefaultMix(defaultMix);
+}
+
+FFI_PLUGIN_EXPORT void spine_animation_state_data_set_mix(spine_animation_state_data stateData, spine_animation from, spine_animation to, float duration) {
+    if (stateData == nullptr) return;
+    if (from == nullptr || to == nullptr) return;
+    AnimationStateData* _stateData = (AnimationStateData*)stateData;
+    _stateData->setMix((Animation*)from, (Animation*)to, duration);
+}
+
+FFI_PLUGIN_EXPORT float spine_animation_state_data_get_mix(spine_animation_state_data stateData, spine_animation from, spine_animation to) {
+    if (stateData == nullptr) return 0;
+    if (from == nullptr || to == nullptr) return 0;
+    AnimationStateData* _stateData = (AnimationStateData*)stateData;
+    return _stateData->getMix((Animation*)from, (Animation*)to);
+}
+
+FFI_PLUGIN_EXPORT void spine_animation_state_data_set_mix_by_name(spine_animation_state_data stateData, const char* fromName, const char* toName, float duration) {
+    if (stateData == nullptr) return;
+    if (fromName == nullptr || toName == nullptr) return;
+    AnimationStateData* _stateData = (AnimationStateData*)stateData;
+    _stateData->setMix(fromName, toName, duration);
+}
+
+FFI_PLUGIN_EXPORT float spine_animation_state_data_get_mix_by_name(spine_animation_state_data stateData, const char* fromName, const char* toName) {
+    if (stateData == nullptr) return 0;
+    AnimationStateData* _stateData = (AnimationStateData*)stateData;
+    Animation* from = _stateData->getSkeletonData()->findAnimation(fromName);
+    Animation* to = _stateData->getSkeletonData()->findAnimation(toName);
+    if (from == nullptr || to == nullptr) return 0;
+    return _stateData->getMix(from, to);
+}
+
+FFI_PLUGIN_EXPORT void spine_animation_state_data_clear(spine_animation_state_data stateData) {
+    if (stateData == nullptr) return ;
+    AnimationStateData* _stateData = (AnimationStateData*)stateData;
+    _stateData->clear();
+}
+
+// AnimationState
 FFI_PLUGIN_EXPORT void spine_animation_state_update(spine_animation_state state, float delta) {
     if (state == nullptr) return;
     AnimationState *_state = (AnimationState*)state;

spine-flutter/src/spine_flutter.h

@@ -53,6 +53,7 @@ SPINE_OPAQUE_TYPE(spine_transform_constraint_data)
 SPINE_OPAQUE_TYPE(spine_path_constraint)
 SPINE_OPAQUE_TYPE(spine_path_constraint_data)
 SPINE_OPAQUE_TYPE(spine_animation_state)
+SPINE_OPAQUE_TYPE(spine_animation_state_data)
 SPINE_OPAQUE_TYPE(spine_animation_state_events)
 SPINE_OPAQUE_TYPE(spine_event)
 SPINE_OPAQUE_TYPE(spine_event_data)
@@ -162,6 +163,7 @@ typedef struct spine_vector {
 typedef struct spine_skeleton_drawable {
     spine_skeleton skeleton;
     spine_animation_state animationState;
+    spine_animation_state_data animationStateData;
     spine_animation_state_events animationStateEvents;
     void *clipping;
     spine_render_command *renderCommand;
@@ -236,6 +238,15 @@ FFI_PLUGIN_EXPORT void spine_skeleton_drawable_dispose(spine_skeleton_drawable *
 FFI_PLUGIN_EXPORT const char* spine_animation_get_name(spine_animation animation);
 FFI_PLUGIN_EXPORT float spine_animation_get_duration(spine_animation animation);
 
+FFI_PLUGIN_EXPORT spine_skeleton_data spine_animation_state_data_get_skeleton_data(spine_animation_state_data stateData);
+FFI_PLUGIN_EXPORT float spine_animation_state_data_get_default_mix(spine_animation_state_data stateData);
+FFI_PLUGIN_EXPORT void spine_animation_state_data_set_default_mix(spine_animation_state_data stateData, float defaultMix);
+FFI_PLUGIN_EXPORT void spine_animation_state_data_set_mix(spine_animation_state_data stateData, spine_animation from, spine_animation to, float duration);
+FFI_PLUGIN_EXPORT float spine_animation_state_data_get_mix(spine_animation_state_data stateData, spine_animation from, spine_animation to);
+FFI_PLUGIN_EXPORT void spine_animation_state_data_set_mix_by_name(spine_animation_state_data stateData, const char* fromName, const char* toName, float duration);
+FFI_PLUGIN_EXPORT float spine_animation_state_data_get_mix_by_name(spine_animation_state_data stateData, const char* fromName, const char* toName);
+FFI_PLUGIN_EXPORT void spine_animation_state_data_clear(spine_animation_state_data stateData);
+
 FFI_PLUGIN_EXPORT void spine_animation_state_update(spine_animation_state state, float delta);
 FFI_PLUGIN_EXPORT void spine_animation_state_dispose_track_entry(spine_animation_state state, spine_track_entry entry);
 FFI_PLUGIN_EXPORT void spine_animation_state_apply(spine_animation_state state, spine_skeleton skeleton);