Nnnn duplicate state layers

adding support for duplicating state machine layers with view model conditions.
It also handles missing view model conditions in the cpp runtime when they are not fully set
and changes how the default values are retrieved to avoid memory leaks

Diffs=
8f9da9d694 Nnnn duplicate state layers (#9067)

Co-authored-by: hernan <[email protected]>

.rive_head

@@ -1 +1 @@
-63642c62d46f41939545609dd151b68d0f4f67fe
+8f9da9d694556c39397c96dbd24dde118220f0ed

include/rive/animation/transition_property_viewmodel_comparator.hpp

@@ -18,14 +18,17 @@ class TransitionPropertyViewModelComparator
     template <typename T = BindableProperty, typename U>
     U value(const StateMachineInstance* stateMachineInstance)
     {
-        if (m_bindableProperty->is<T>())
+        if (m_bindableProperty != nullptr && m_bindableProperty->is<T>())
         {
             auto bindableInstance =
                 stateMachineInstance->bindablePropertyInstance(
                     m_bindableProperty);
-            return bindableInstance->as<T>()->propertyValue();
+            if (bindableInstance != nullptr)
+            {
+                return bindableInstance->as<T>()->propertyValue();
+            }
         }
-        return (new T())->propertyValue();
+        return T::defaultValue;
     };
     void useInLayer(const StateMachineInstance* stateMachineInstance,
                     StateMachineLayerInstance* layerInstance) const override;

include/rive/data_bind/bindable_property_boolean.hpp

@@ -7,6 +7,7 @@ namespace rive
 class BindablePropertyBoolean : public BindablePropertyBooleanBase
 {
 public:
+    constexpr static bool defaultValue = false;
 };
 } // namespace rive
 

include/rive/data_bind/bindable_property_color.hpp

@@ -7,6 +7,7 @@ namespace rive
 class BindablePropertyColor : public BindablePropertyColorBase
 {
 public:
+    constexpr static int defaultValue = 0;
 };
 } // namespace rive
 

include/rive/data_bind/bindable_property_enum.hpp

@@ -7,6 +7,7 @@ namespace rive
 class BindablePropertyEnum : public BindablePropertyEnumBase
 {
 public:
+    constexpr static uint16_t defaultValue = 0;
 };
 } // namespace rive
 

include/rive/data_bind/bindable_property_number.hpp

@@ -7,6 +7,7 @@ namespace rive
 class BindablePropertyNumber : public BindablePropertyNumberBase
 {
 public:
+    constexpr static float defaultValue = 0;
 };
 } // namespace rive
 

include/rive/data_bind/bindable_property_string.hpp

@@ -2,11 +2,13 @@
 #define _RIVE_BINDABLE_PROPERTY_STRING_HPP_
 #include "rive/generated/data_bind/bindable_property_string_base.hpp"
 #include <stdio.h>
+#include <string_view>
 namespace rive
 {
 class BindablePropertyString : public BindablePropertyStringBase
 {
 public:
+    static constexpr const char* defaultValue = "";
 };
 } // namespace rive
 

include/rive/data_bind/bindable_property_trigger.hpp

@@ -7,6 +7,7 @@ namespace rive
 class BindablePropertyTrigger : public BindablePropertyTriggerBase
 {
 public:
+    constexpr static uint32_t defaultValue = 0;
 };
 } // namespace rive
 

src/animation/transition_property_viewmodel_comparator.cpp

@@ -204,6 +204,10 @@ void TransitionPropertyViewModelComparator::useInLayer(
 
     auto bindableInstance =
         stateMachineInstance->bindablePropertyInstance(m_bindableProperty);
+    if (bindableInstance == nullptr)
+    {
+        return;
+    }
     auto dataBind =
         stateMachineInstance->bindableDataBindToTarget(bindableInstance);
     auto source = dataBind->source();