Commit: fdb7d3f48936ad0fc1cc0a70f1df43c4558ec9be Author: Hans Goudey Date: Thu Apr 22 09:20:03 2021 -0500 Branches: temp-gpencil-bezier-stroke-type https://developer.blender.org/rBfdb7d3f48936ad0fc1cc0a70f1df43c4558ec9be
Geometry Nodes: Add initializer for attribute creation Previously we always had to set attribute values after creating the attribute. This patch adds an initializer argument to `attribute_try_create` which can fill it in a few ways, which are explained in code comments. This fixes T87597. Differential Revision: https://developer.blender.org/D11045 =================================================================== M source/blender/blenkernel/BKE_geometry_set.hh M source/blender/blenkernel/intern/attribute_access.cc M source/blender/blenkernel/intern/attribute_access_intern.hh M source/blender/blenkernel/intern/geometry_component_mesh.cc M source/blender/blenkernel/intern/geometry_set_instances.cc =================================================================== diff --git a/source/blender/blenkernel/BKE_geometry_set.hh b/source/blender/blenkernel/BKE_geometry_set.hh index e9545cba1f1..027338a5d5c 100644 --- a/source/blender/blenkernel/BKE_geometry_set.hh +++ b/source/blender/blenkernel/BKE_geometry_set.hh @@ -69,6 +69,65 @@ struct AttributeMetaData { using AttributeForeachCallback = blender::FunctionRef<bool(blender::StringRefNull attribute_name, const AttributeMetaData &meta_data)>; +/** + * Base class for the attribute intializer types described below. + */ +struct AttributeInit { + enum class Type { + Default, + VArray, + MoveArray, + }; + Type type; + AttributeInit(const Type type) : type(type) + { + } +}; + +/** + * Create an attribute using the default value for the data type. + * The default values may depend on the attribute provider implementation. + */ +struct AttributeInitDefault : public AttributeInit { + AttributeInitDefault() : AttributeInit(Type::Default) + { + } +}; + +/** + * Create an attribute by copying data from an existing virtual array. The virtual array + * must have the same type as the newly created attribute. + * + * Note that this can be used to fill the new attribute with the default + */ +struct AttributeInitVArray : public AttributeInit { + const blender::fn::GVArray *varray; + + AttributeInitVArray(const blender::fn::GVArray *varray) + : AttributeInit(Type::VArray), varray(varray) + { + } +}; + +/** + * Create an attribute with a by passing ownership of a pre-allocated contiguous array of data. + * Sometimes data is created before a geometry component is available. In that case, it's + * preferable to move data directly to the created attribute to avoid a new allocation and a copy. + * + * Note that this will only have a benefit for attributes that are stored directly as contigious + * arrays, so not for some built-in attributes. + * + * The array must be allocated with MEM_*, since `attribute_try_create` will free the array if it + * can't be used directly, and that is generally how Blender expects custom data to be allocated. + */ +struct AttributeInitMove : public AttributeInit { + void *data = nullptr; + + AttributeInitMove(void *data) : AttributeInit(Type::MoveArray), data(data) + { + } +}; + /** * This is the base class for specialized geometry component types. */ @@ -137,11 +196,13 @@ class GeometryComponent { /* Returns true when the attribute has been created. */ bool attribute_try_create(const blender::StringRef attribute_name, const AttributeDomain domain, - const CustomDataType data_type); + const CustomDataType data_type, + const AttributeInit &initializer); /* Try to create the builtin attribute with the given name. No data type or domain has to be * provided, because those are fixed for builtin attributes. */ - bool attribute_try_create_builtin(const blender::StringRef attribute_name); + bool attribute_try_create_builtin(const blender::StringRef attribute_name, + const AttributeInit &initializer); blender::Set<std::string> attribute_names() const; bool attribute_foreach(const AttributeForeachCallback callback) const; diff --git a/source/blender/blenkernel/intern/attribute_access.cc b/source/blender/blenkernel/intern/attribute_access.cc index 571763e3719..6c37d34dc9b 100644 --- a/source/blender/blenkernel/intern/attribute_access.cc +++ b/source/blender/blenkernel/intern/attribute_access.cc @@ -254,7 +254,43 @@ bool BuiltinCustomDataLayerProvider::try_delete(GeometryComponent &component) co return delete_success; } -bool BuiltinCustomDataLayerProvider::try_create(GeometryComponent &component) const +static bool add_custom_data_layer_from_attribute_init(CustomData &custom_data, + const CustomDataType data_type, + const int domain_size, + const AttributeInit &initializer) +{ + switch (initializer.type) { + case AttributeInit::Type::Default: { + void *data = CustomData_add_layer(&custom_data, data_type, CD_DEFAULT, nullptr, domain_size); + return data != nullptr; + } + case AttributeInit::Type::VArray: { + void *data = CustomData_add_layer(&custom_data, data_type, CD_DEFAULT, nullptr, domain_size); + if (data == nullptr) { + return false; + } + const GVArray *varray = static_cast<const AttributeInitVArray &>(initializer).varray; + varray->materialize_to_uninitialized(IndexRange(varray->size()), data); + return true; + } + case AttributeInit::Type::MoveArray: { + void *source_data = static_cast<const AttributeInitMove &>(initializer).data; + void *data = CustomData_add_layer( + &custom_data, data_type, CD_ASSIGN, source_data, domain_size); + if (data == nullptr) { + MEM_freeN(source_data); + return false; + } + return true; + } + } + + BLI_assert_unreachable(); + return false; +} + +bool BuiltinCustomDataLayerProvider::try_create(GeometryComponent &component, + const AttributeInit &initializer) const { if (createable_ != Creatable) { return false; @@ -267,10 +303,10 @@ bool BuiltinCustomDataLayerProvider::try_create(GeometryComponent &component) co /* Exists already. */ return false; } + const int domain_size = component.attribute_domain_size(domain_); - const void *data = CustomData_add_layer( - custom_data, stored_type_, CD_DEFAULT, nullptr, domain_size); - const bool success = data != nullptr; + const bool success = add_custom_data_layer_from_attribute_init( + *custom_data, stored_type_, domain_size, initializer); if (success) { custom_data_access_.update_custom_data_pointers(component); } @@ -372,10 +408,52 @@ bool CustomDataAttributeProvider::try_delete(GeometryComponent &component, return false; } +static bool add_named_custom_data_layer_from_attribute_init(const StringRef attribute_name, + CustomData &custom_data, + const CustomDataType data_type, + const int domain_size, + const AttributeInit &initializer) +{ + char attribute_name_c[MAX_NAME]; + attribute_name.copy(attribute_name_c); + + switch (initializer.type) { + case AttributeInit::Type::Default: { + void *data = CustomData_add_layer_named( + &custom_data, data_type, CD_DEFAULT, nullptr, domain_size, attribute_name_c); + return data != nullptr; + } + case AttributeInit::Type::VArray: { + void *data = CustomData_add_layer_named( + &custom_data, data_type, CD_DEFAULT, nullptr, domain_size, attribute_name_c); + if (data == nullptr) { + return false; + } + const GVArray *varray = static_cast<const AttributeInitVArray &>(initializer).varray; + varray->materialize_to_uninitialized(IndexRange(varray->size()), data); + return true; + } + case AttributeInit::Type::MoveArray: { + void *source_data = static_cast<const AttributeInitMove &>(initializer).data; + void *data = CustomData_add_layer_named( + &custom_data, data_type, CD_ASSIGN, source_data, domain_size, attribute_name_c); + if (data == nullptr) { + MEM_freeN(source_data); + return false; + } + return true; + } + } + + BLI_assert_unreachable(); + return false; +} + bool CustomDataAttributeProvider::try_create(GeometryComponent &component, const StringRef attribute_name, const AttributeDomain domain, - const CustomDataType data_type) const + const CustomDataType data_type, + const AttributeInit &initializer) const { if (domain_ != domain) { return false; @@ -393,10 +471,8 @@ bool CustomDataAttributeProvider::try_create(GeometryComponent &component, } } const int domain_size = component.attribute_domain_size(domain_); - char attribute_name_c[MAX_NAME]; - attribute_name.copy(attribute_name_c); - CustomData_add_layer_named( - custom_data, data_type, CD_DEFAULT, nullptr, domain_size, attribute_name_c); + add_named_custom_data_layer_from_attribute_init( + attribute_name, *custom_data, data_type, domain_size, initializer); return true; } @@ -621,7 +697,8 @@ bool GeometryComponent::attribute_try_delete(const StringRef attribute_name) bool GeometryComponent::attribute_try_create(const StringRef attribute_name, const AttributeDomain domain, - const CustomDataType data_type) + const CustomDataType data_type, + const AttributeInit &initializer) { using namespace blender::bke; if (attribute_name.is_empty()) { @@ -640,18 +717,19 @@ bool GeometryComponent::attribute_try_create(const StringRef attribute_name, if (builtin_provider->data_type() != data_type) { return false; } - return builtin_provider->try_create(*this); + return builtin_provider->try_create(*this, initializer); } for (const DynamicAttributesProvider *dynamic_provider : providers->dynamic_attribute_providers()) { - if (dynamic_provider->try_create(*this, attribute_name, domain, data_type)) { + if (dynamic_provider->try_create(*this, attribute_name, domain, data_type, initializer)) { return true; } } return false; } -bool GeometryComponent::attribute_try_create_builtin(const blender::StringRef attribute_name) +bool GeometryComponent::attribute_try_create_builtin(const blender::StringRef att @@ Diff output truncated at 10240 characters. @@ _______________________________________________ Bf-blender-cvs mailing list [email protected] https://lists.blender.org/mailman/listinfo/bf-blender-cvs
