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blender-archive/source/blender/nodes/intern/geometry_nodes_execute.cc

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/* SPDX-License-Identifier: GPL-2.0-or-later */
/** \file
* \ingroup nodes
*
* This file mainly converts a #bNodeTree into a lazy-function graph. This generally works by
* creating a lazy-function for every node, which is then put into the lazy-function graph. Then
* the nodes in the new graph are linked based on links in the original #bNodeTree. Some additional
* nodes are inserted for things like type conversions and multi-input sockets.
*
* Currently, lazy-functions are even created for nodes that don't strictly require it, like
* reroutes or muted nodes. In the future we could avoid that at the cost of additional code
* complexity. So far, this does not seem to be a performance issue.
*/
#include "NOD_geometry_exec.hh"
#include "NOD_geometry_nodes_execute.hh"
#include "NOD_geometry_nodes_lazy_function.hh"
#include "NOD_multi_function.hh"
#include "NOD_node_declaration.hh"
#include "BLI_cpp_types.hh"
#include "BLI_dot_export.hh"
#include "BLI_hash.h"
#include "BLI_lazy_threading.hh"
#include "BLI_map.hh"
#include "DNA_ID.h"
#include "BKE_compute_contexts.hh"
#include "BKE_geometry_set.hh"
#include "BKE_idprop.hh"
#include "BKE_type_conversions.hh"
#include "FN_field_cpp_type.hh"
#include "FN_lazy_function_execute.hh"
#include "FN_lazy_function_graph_executor.hh"
#include "DEG_depsgraph_query.h"
namespace lf = blender::fn::lazy_function;
namespace geo_log = blender::nodes::geo_eval_log;
namespace blender::nodes {
static const std::string use_attribute_suffix = "_use_attribute";
static const std::string attribute_name_suffix = "_attribute_name";
bool socket_type_has_attribute_toggle(const bNodeSocket &socket)
{
return ELEM(socket.type, SOCK_FLOAT, SOCK_VECTOR, SOCK_BOOLEAN, SOCK_RGBA, SOCK_INT);
}
bool input_has_attribute_toggle(const bNodeTree &node_tree, const int socket_index)
{
BLI_assert(node_tree.runtime->field_inferencing_interface);
const nodes::FieldInferencingInterface &field_interface =
*node_tree.runtime->field_inferencing_interface;
return field_interface.inputs[socket_index] != nodes::InputSocketFieldType::None;
}
std::unique_ptr<IDProperty, bke::idprop::IDPropertyDeleter> id_property_create_from_socket(
const bNodeSocket &socket)
{
switch (socket.type) {
case SOCK_FLOAT: {
const bNodeSocketValueFloat *value = static_cast<const bNodeSocketValueFloat *>(
socket.default_value);
auto property = bke::idprop::create(socket.identifier, value->value);
IDPropertyUIDataFloat *ui_data = (IDPropertyUIDataFloat *)IDP_ui_data_ensure(property.get());
ui_data->base.rna_subtype = value->subtype;
ui_data->soft_min = double(value->min);
ui_data->soft_max = double(value->max);
ui_data->default_value = value->value;
return property;
}
case SOCK_INT: {
const bNodeSocketValueInt *value = static_cast<const bNodeSocketValueInt *>(
socket.default_value);
auto property = bke::idprop::create(socket.identifier, value->value);
IDPropertyUIDataInt *ui_data = (IDPropertyUIDataInt *)IDP_ui_data_ensure(property.get());
ui_data->base.rna_subtype = value->subtype;
ui_data->soft_min = value->min;
ui_data->soft_max = value->max;
ui_data->default_value = value->value;
return property;
}
case SOCK_VECTOR: {
const bNodeSocketValueVector *value = static_cast<const bNodeSocketValueVector *>(
socket.default_value);
auto property = bke::idprop::create(
socket.identifier, Span<float>{value->value[0], value->value[1], value->value[2]});
IDPropertyUIDataFloat *ui_data = (IDPropertyUIDataFloat *)IDP_ui_data_ensure(property.get());
ui_data->base.rna_subtype = value->subtype;
ui_data->soft_min = double(value->min);
ui_data->soft_max = double(value->max);
ui_data->default_array = (double *)MEM_mallocN(sizeof(double[3]), "mod_prop_default");
ui_data->default_array_len = 3;
for (const int i : IndexRange(3)) {
ui_data->default_array[i] = double(value->value[i]);
}
return property;
}
case SOCK_RGBA: {
const bNodeSocketValueRGBA *value = static_cast<const bNodeSocketValueRGBA *>(
socket.default_value);
auto property = bke::idprop::create(
socket.identifier,
Span<float>{value->value[0], value->value[1], value->value[2], value->value[3]});
IDPropertyUIDataFloat *ui_data = (IDPropertyUIDataFloat *)IDP_ui_data_ensure(property.get());
ui_data->base.rna_subtype = PROP_COLOR;
ui_data->default_array = (double *)MEM_mallocN(sizeof(double[4]), __func__);
ui_data->default_array_len = 4;
ui_data->min = 0.0;
ui_data->max = FLT_MAX;
ui_data->soft_min = 0.0;
ui_data->soft_max = 1.0;
for (const int i : IndexRange(4)) {
ui_data->default_array[i] = double(value->value[i]);
}
return property;
}
case SOCK_BOOLEAN: {
const bNodeSocketValueBoolean *value = static_cast<const bNodeSocketValueBoolean *>(
socket.default_value);
auto property = bke::idprop::create_bool(socket.identifier, value->value);
IDPropertyUIDataBool *ui_data = (IDPropertyUIDataBool *)IDP_ui_data_ensure(property.get());
ui_data->default_value = value->value != 0;
return property;
}
case SOCK_STRING: {
const bNodeSocketValueString *value = static_cast<const bNodeSocketValueString *>(
socket.default_value);
auto property = bke::idprop::create(socket.identifier, value->value);
IDPropertyUIDataString *ui_data = (IDPropertyUIDataString *)IDP_ui_data_ensure(
property.get());
ui_data->default_value = BLI_strdup(value->value);
return property;
}
case SOCK_OBJECT: {
const bNodeSocketValueObject *value = static_cast<const bNodeSocketValueObject *>(
socket.default_value);
auto property = bke::idprop::create(socket.identifier, reinterpret_cast<ID *>(value->value));
IDPropertyUIDataID *ui_data = (IDPropertyUIDataID *)IDP_ui_data_ensure(property.get());
ui_data->id_type = ID_OB;
return property;
}
case SOCK_COLLECTION: {
const bNodeSocketValueCollection *value = static_cast<const bNodeSocketValueCollection *>(
socket.default_value);
return bke::idprop::create(socket.identifier, reinterpret_cast<ID *>(value->value));
}
case SOCK_TEXTURE: {
const bNodeSocketValueTexture *value = static_cast<const bNodeSocketValueTexture *>(
socket.default_value);
return bke::idprop::create(socket.identifier, reinterpret_cast<ID *>(value->value));
}
case SOCK_IMAGE: {
const bNodeSocketValueImage *value = static_cast<const bNodeSocketValueImage *>(
socket.default_value);
return bke::idprop::create(socket.identifier, reinterpret_cast<ID *>(value->value));
}
case SOCK_MATERIAL: {
const bNodeSocketValueMaterial *value = static_cast<const bNodeSocketValueMaterial *>(
socket.default_value);
return bke::idprop::create(socket.identifier, reinterpret_cast<ID *>(value->value));
}
}
return nullptr;
}
bool id_property_type_matches_socket(const bNodeSocket &socket, const IDProperty &property)
{
switch (socket.type) {
case SOCK_FLOAT:
return ELEM(property.type, IDP_FLOAT, IDP_DOUBLE);
case SOCK_INT:
return property.type == IDP_INT;
case SOCK_VECTOR:
return property.type == IDP_ARRAY && property.subtype == IDP_FLOAT && property.len == 3;
case SOCK_RGBA:
return property.type == IDP_ARRAY && property.subtype == IDP_FLOAT && property.len == 4;
case SOCK_BOOLEAN:
return property.type == IDP_BOOLEAN;
case SOCK_STRING:
return property.type == IDP_STRING;
case SOCK_OBJECT:
case SOCK_COLLECTION:
case SOCK_TEXTURE:
case SOCK_IMAGE:
case SOCK_MATERIAL:
return property.type == IDP_ID;
}
BLI_assert_unreachable();
return false;
}
static void init_socket_cpp_value_from_property(const IDProperty &property,
const eNodeSocketDatatype socket_value_type,
void *r_value)
{
switch (socket_value_type) {
case SOCK_FLOAT: {
float value = 0.0f;
if (property.type == IDP_FLOAT) {
value = IDP_Float(&property);
}
else if (property.type == IDP_DOUBLE) {
value = float(IDP_Double(&property));
}
new (r_value) fn::ValueOrField<float>(value);
break;
}
case SOCK_INT: {
int value = IDP_Int(&property);
new (r_value) fn::ValueOrField<int>(value);
break;
}
case SOCK_VECTOR: {
float3 value = (const float *)IDP_Array(&property);
new (r_value) fn::ValueOrField<float3>(value);
break;
}
case SOCK_RGBA: {
ColorGeometry4f value = (const float *)IDP_Array(&property);
new (r_value) fn::ValueOrField<ColorGeometry4f>(value);
break;
}
case SOCK_BOOLEAN: {
const bool value = IDP_Bool(&property);
new (r_value) fn::ValueOrField<bool>(value);
break;
}
case SOCK_STRING: {
std::string value = IDP_String(&property);
new (r_value) fn::ValueOrField<std::string>(std::move(value));
break;
}
case SOCK_OBJECT: {
ID *id = IDP_Id(&property);
Object *object = (id && GS(id->name) == ID_OB) ? (Object *)id : nullptr;
*(Object **)r_value = object;
break;
}
case SOCK_COLLECTION: {
ID *id = IDP_Id(&property);
Collection *collection = (id && GS(id->name) == ID_GR) ? (Collection *)id : nullptr;
*(Collection **)r_value = collection;
break;
}
case SOCK_TEXTURE: {
ID *id = IDP_Id(&property);
Tex *texture = (id && GS(id->name) == ID_TE) ? (Tex *)id : nullptr;
*(Tex **)r_value = texture;
break;
}
case SOCK_IMAGE: {
ID *id = IDP_Id(&property);
Image *image = (id && GS(id->name) == ID_IM) ? (Image *)id : nullptr;
*(Image **)r_value = image;
break;
}
case SOCK_MATERIAL: {
ID *id = IDP_Id(&property);
Material *material = (id && GS(id->name) == ID_MA) ? (Material *)id : nullptr;
*(Material **)r_value = material;
break;
}
default: {
BLI_assert_unreachable();
break;
}
}
}
static void initialize_group_input(const bNodeTree &tree,
const IDProperty *properties,
const int input_index,
void *r_value)
{
const bNodeSocket &io_input = *tree.interface_inputs()[input_index];
const bNodeSocketType &socket_type = *io_input.typeinfo;
const eNodeSocketDatatype socket_data_type = static_cast<eNodeSocketDatatype>(io_input.type);
if (properties == nullptr) {
socket_type.get_geometry_nodes_cpp_value(io_input, r_value);
return;
}
const IDProperty *property = IDP_GetPropertyFromGroup(properties, io_input.identifier);
if (property == nullptr) {
socket_type.get_geometry_nodes_cpp_value(io_input, r_value);
return;
}
if (!id_property_type_matches_socket(io_input, *property)) {
socket_type.get_geometry_nodes_cpp_value(io_input, r_value);
return;
}
if (!input_has_attribute_toggle(tree, input_index)) {
init_socket_cpp_value_from_property(*property, socket_data_type, r_value);
return;
}
const IDProperty *property_use_attribute = IDP_GetPropertyFromGroup(
properties, (io_input.identifier + use_attribute_suffix).c_str());
const IDProperty *property_attribute_name = IDP_GetPropertyFromGroup(
properties, (io_input.identifier + attribute_name_suffix).c_str());
if (property_use_attribute == nullptr || property_attribute_name == nullptr) {
init_socket_cpp_value_from_property(*property, socket_data_type, r_value);
return;
}
const bool use_attribute = IDP_Int(property_use_attribute) != 0;
if (use_attribute) {
const StringRef attribute_name{IDP_String(property_attribute_name)};
if (!bke::allow_procedural_attribute_access(attribute_name)) {
init_socket_cpp_value_from_property(*property, socket_data_type, r_value);
return;
}
fn::GField attribute_field = bke::AttributeFieldInput::Create(attribute_name,
*socket_type.base_cpp_type);
const auto *value_or_field_cpp_type = fn::ValueOrFieldCPPType::get_from_self(
*socket_type.geometry_nodes_cpp_type);
BLI_assert(value_or_field_cpp_type != nullptr);
value_or_field_cpp_type->construct_from_field(r_value, std::move(attribute_field));
}
else {
init_socket_cpp_value_from_property(*property, socket_data_type, r_value);
}
}
struct OutputAttributeInfo {
fn::GField field;
StringRefNull name;
};
struct OutputAttributeToStore {
GeometryComponentType component_type;
eAttrDomain domain;
StringRefNull name;
GMutableSpan data;
};
/**
* The output attributes are organized based on their domain, because attributes on the same domain
* can be evaluated together.
*/
static MultiValueMap<eAttrDomain, OutputAttributeInfo> find_output_attributes_to_store(
const bNodeTree &tree, const IDProperty *properties, Span<GMutablePointer> output_values)
{
const bNode &output_node = *tree.group_output_node();
MultiValueMap<eAttrDomain, OutputAttributeInfo> outputs_by_domain;
for (const bNodeSocket *socket : output_node.input_sockets().drop_front(1).drop_back(1)) {
if (!socket_type_has_attribute_toggle(*socket)) {
continue;
}
const std::string prop_name = socket->identifier + attribute_name_suffix;
const IDProperty *prop = IDP_GetPropertyFromGroup(properties, prop_name.c_str());
if (prop == nullptr) {
continue;
}
const StringRefNull attribute_name = IDP_String(prop);
if (attribute_name.is_empty()) {
continue;
}
if (!bke::allow_procedural_attribute_access(attribute_name)) {
continue;
}
const int index = socket->index();
const GPointer value = output_values[index];
const auto *value_or_field_type = fn::ValueOrFieldCPPType::get_from_self(*value.type());
BLI_assert(value_or_field_type != nullptr);
const fn::GField field = value_or_field_type->as_field(value.get());
const bNodeSocket *interface_socket = (const bNodeSocket *)BLI_findlink(&tree.outputs, index);
const eAttrDomain domain = (eAttrDomain)interface_socket->attribute_domain;
OutputAttributeInfo output_info;
output_info.field = std::move(field);
output_info.name = attribute_name;
outputs_by_domain.add(domain, std::move(output_info));
}
return outputs_by_domain;
}
/**
* The computed values are stored in newly allocated arrays. They still have to be moved to the
* actual geometry.
*/
static Vector<OutputAttributeToStore> compute_attributes_to_store(
const GeometrySet &geometry,
const MultiValueMap<eAttrDomain, OutputAttributeInfo> &outputs_by_domain)
{
Vector<OutputAttributeToStore> attributes_to_store;
for (const GeometryComponentType component_type : {GEO_COMPONENT_TYPE_MESH,
GEO_COMPONENT_TYPE_POINT_CLOUD,
GEO_COMPONENT_TYPE_CURVE,
GEO_COMPONENT_TYPE_INSTANCES}) {
if (!geometry.has(component_type)) {
continue;
}
const GeometryComponent &component = *geometry.get_component_for_read(component_type);
const bke::AttributeAccessor attributes = *component.attributes();
for (const auto item : outputs_by_domain.items()) {
const eAttrDomain domain = item.key;
const Span<OutputAttributeInfo> outputs_info = item.value;
if (!attributes.domain_supported(domain)) {
continue;
}
const int domain_size = attributes.domain_size(domain);
bke::GeometryFieldContext field_context{component, domain};
fn::FieldEvaluator field_evaluator{field_context, domain_size};
for (const OutputAttributeInfo &output_info : outputs_info) {
const CPPType &type = output_info.field.cpp_type();
const bke::AttributeValidator validator = attributes.lookup_validator(output_info.name);
OutputAttributeToStore store{
component_type,
domain,
output_info.name,
GMutableSpan{
type, MEM_malloc_arrayN(domain_size, type.size(), __func__), domain_size}};
fn::GField field = validator.validate_field_if_necessary(output_info.field);
field_evaluator.add_with_destination(std::move(field), store.data);
attributes_to_store.append(store);
}
field_evaluator.evaluate();
}
}
return attributes_to_store;
}
static void store_computed_output_attributes(
GeometrySet &geometry, const Span<OutputAttributeToStore> attributes_to_store)
{
for (const OutputAttributeToStore &store : attributes_to_store) {
GeometryComponent &component = geometry.get_component_for_write(store.component_type);
bke::MutableAttributeAccessor attributes = *component.attributes_for_write();
const eCustomDataType data_type = bke::cpp_type_to_custom_data_type(store.data.type());
const std::optional<bke::AttributeMetaData> meta_data = attributes.lookup_meta_data(
store.name);
/* Attempt to remove the attribute if it already exists but the domain and type don't match.
* Removing the attribute won't succeed if it is built in and non-removable. */
if (meta_data.has_value() &&
(meta_data->domain != store.domain || meta_data->data_type != data_type)) {
attributes.remove(store.name);
}
/* Try to create the attribute reusing the stored buffer. This will only succeed if the
* attribute didn't exist before, or if it existed but was removed above. */
if (attributes.add(store.name,
store.domain,
bke::cpp_type_to_custom_data_type(store.data.type()),
bke::AttributeInitMoveArray(store.data.data()))) {
continue;
}
bke::GAttributeWriter attribute = attributes.lookup_or_add_for_write(
store.name, store.domain, data_type);
if (attribute) {
attribute.varray.set_all(store.data.data());
attribute.finish();
}
/* We were unable to reuse the data, so it must be destructed and freed. */
store.data.type().destruct_n(store.data.data(), store.data.size());
MEM_freeN(store.data.data());
}
}
static void store_output_attributes(GeometrySet &geometry,
const bNodeTree &tree,
const IDProperty *properties,
Span<GMutablePointer> output_values)
{
/* All new attribute values have to be computed before the geometry is actually changed. This is
* necessary because some fields might depend on attributes that are overwritten. */
MultiValueMap<eAttrDomain, OutputAttributeInfo> outputs_by_domain =
find_output_attributes_to_store(tree, properties, output_values);
Vector<OutputAttributeToStore> attributes_to_store = compute_attributes_to_store(
geometry, outputs_by_domain);
store_computed_output_attributes(geometry, attributes_to_store);
}
GeometrySet execute_geometry_nodes(
const bNodeTree &btree,
const IDProperty *properties,
const ComputeContext &base_compute_context,
GeometrySet input_geometry,
const FunctionRef<void(nodes::GeoNodesLFUserData &)> fill_user_data)
{
const nodes::GeometryNodesLazyFunctionGraphInfo &lf_graph_info =
*nodes::ensure_geometry_nodes_lazy_function_graph(btree);
const nodes::GeometryNodeLazyFunctionGraphMapping &mapping = lf_graph_info.mapping;
Vector<const lf::OutputSocket *> graph_inputs = mapping.group_input_sockets;
graph_inputs.extend(mapping.group_output_used_sockets);
graph_inputs.extend(mapping.attribute_set_by_geometry_output.values().begin(),
mapping.attribute_set_by_geometry_output.values().end());
Vector<const lf::InputSocket *> graph_outputs = mapping.standard_group_output_sockets;
Array<GMutablePointer> param_inputs(graph_inputs.size());
Array<GMutablePointer> param_outputs(graph_outputs.size());
Array<std::optional<lf::ValueUsage>> param_input_usages(graph_inputs.size());
Array<lf::ValueUsage> param_output_usages(graph_outputs.size(), lf::ValueUsage::Used);
Array<bool> param_set_outputs(graph_outputs.size(), false);
nodes::GeometryNodesLazyFunctionLogger lf_logger(lf_graph_info);
nodes::GeometryNodesLazyFunctionSideEffectProvider lf_side_effect_provider;
lf::GraphExecutor graph_executor{
lf_graph_info.graph, graph_inputs, graph_outputs, &lf_logger, &lf_side_effect_provider};
nodes::GeoNodesLFUserData user_data;
fill_user_data(user_data);
user_data.compute_context = &base_compute_context;
LinearAllocator<> allocator;
Vector<GMutablePointer> inputs_to_destruct;
int input_index = -1;
for (const int i : btree.interface_inputs().index_range()) {
input_index++;
const bNodeSocket &interface_socket = *btree.interface_inputs()[i];
if (interface_socket.type == SOCK_GEOMETRY && input_index == 0) {
param_inputs[input_index] = &input_geometry;
continue;
}
const CPPType *type = interface_socket.typeinfo->geometry_nodes_cpp_type;
BLI_assert(type != nullptr);
void *value = allocator.allocate(type->size(), type->alignment());
initialize_group_input(btree, properties, i, value);
param_inputs[input_index] = {type, value};
inputs_to_destruct.append({type, value});
}
Array<bool> output_used_inputs(btree.interface_outputs().size(), true);
for (const int i : btree.interface_outputs().index_range()) {
input_index++;
param_inputs[input_index] = &output_used_inputs[i];
}
Array<bke::AnonymousAttributeSet> attributes_to_propagate(
mapping.attribute_set_by_geometry_output.size());
for (const int i : attributes_to_propagate.index_range()) {
input_index++;
param_inputs[input_index] = &attributes_to_propagate[i];
}
for (const int i : graph_outputs.index_range()) {
const lf::InputSocket &socket = *graph_outputs[i];
const CPPType &type = socket.type();
void *buffer = allocator.allocate(type.size(), type.alignment());
param_outputs[i] = {type, buffer};
}
lf::Context lf_context;
lf_context.storage = graph_executor.init_storage(allocator);
lf_context.user_data = &user_data;
lf::BasicParams lf_params{graph_executor,
param_inputs,
param_outputs,
param_input_usages,
param_output_usages,
param_set_outputs};
graph_executor.execute(lf_params, lf_context);
graph_executor.destruct_storage(lf_context.storage);
for (GMutablePointer &ptr : inputs_to_destruct) {
ptr.destruct();
}
GeometrySet output_geometry = std::move(*param_outputs[0].get<GeometrySet>());
store_output_attributes(output_geometry, btree, properties, param_outputs);
for (GMutablePointer &ptr : param_outputs) {
ptr.destruct();
}
return output_geometry;
}
void update_input_properties_from_node_tree(const bNodeTree &tree,
const IDProperty *old_properties,
IDProperty &properties)
{
tree.ensure_topology_cache();
const Span<const bNodeSocket *> tree_inputs = tree.interface_inputs();
for (const int i : tree_inputs.index_range()) {
const bNodeSocket &socket = *tree_inputs[i];
IDProperty *new_prop = nodes::id_property_create_from_socket(socket).release();
if (new_prop == nullptr) {
/* Out of the set of supported input sockets, only
* geometry sockets aren't added to the modifier. */
BLI_assert(socket.type == SOCK_GEOMETRY);
continue;
}
new_prop->flag |= IDP_FLAG_OVERRIDABLE_LIBRARY;
if (socket.description[0] != '\0') {
IDPropertyUIData *ui_data = IDP_ui_data_ensure(new_prop);
ui_data->description = BLI_strdup(socket.description);
}
IDP_AddToGroup(&properties, new_prop);
if (old_properties != nullptr) {
const IDProperty *old_prop = IDP_GetPropertyFromGroup(old_properties, socket.identifier);
if (old_prop != nullptr) {
if (nodes::id_property_type_matches_socket(socket, *old_prop)) {
/* #IDP_CopyPropertyContent replaces the UI data as well, which we don't (we only
* want to replace the values). So release it temporarily and replace it after. */
IDPropertyUIData *ui_data = new_prop->ui_data;
new_prop->ui_data = nullptr;
IDP_CopyPropertyContent(new_prop, old_prop);
if (new_prop->ui_data != nullptr) {
IDP_ui_data_free(new_prop);
}
new_prop->ui_data = ui_data;
}
else if (old_prop->type == IDP_INT && new_prop->type == IDP_BOOLEAN) {
/* Support versioning from integer to boolean property values. The actual value is stored
* in the same variable for both types. */
new_prop->data.val = old_prop->data.val != 0;
}
}
}
if (nodes::socket_type_has_attribute_toggle(socket)) {
const std::string use_attribute_id = socket.identifier + use_attribute_suffix;
const std::string attribute_name_id = socket.identifier + attribute_name_suffix;
IDPropertyTemplate idprop = {0};
IDProperty *use_attribute_prop = IDP_New(IDP_INT, &idprop, use_attribute_id.c_str());
IDP_AddToGroup(&properties, use_attribute_prop);
IDProperty *attribute_prop = IDP_New(IDP_STRING, &idprop, attribute_name_id.c_str());
IDP_AddToGroup(&properties, attribute_prop);
if (old_properties == nullptr) {
if (socket.default_attribute_name && socket.default_attribute_name[0] != '\0') {
IDP_AssignString(attribute_prop, socket.default_attribute_name, MAX_NAME);
IDP_Int(use_attribute_prop) = 1;
}
}
else {
IDProperty *old_prop_use_attribute = IDP_GetPropertyFromGroup(old_properties,
use_attribute_id.c_str());
if (old_prop_use_attribute != nullptr) {
IDP_CopyPropertyContent(use_attribute_prop, old_prop_use_attribute);
}
IDProperty *old_attribute_name_prop = IDP_GetPropertyFromGroup(old_properties,
attribute_name_id.c_str());
if (old_attribute_name_prop != nullptr) {
IDP_CopyPropertyContent(attribute_prop, old_attribute_name_prop);
}
}
}
}
}
void update_output_properties_from_node_tree(const bNodeTree &tree,
const IDProperty *old_properties,
IDProperty &properties)
{
tree.ensure_topology_cache();
const Span<const bNodeSocket *> tree_outputs = tree.interface_outputs();
for (const int i : tree_outputs.index_range()) {
const bNodeSocket &socket = *tree_outputs[i];
if (!nodes::socket_type_has_attribute_toggle(socket)) {
continue;
}
const std::string idprop_name = socket.identifier + attribute_name_suffix;
IDProperty *new_prop = IDP_NewString("", idprop_name.c_str(), MAX_NAME);
if (socket.description[0] != '\0') {
IDPropertyUIData *ui_data = IDP_ui_data_ensure(new_prop);
ui_data->description = BLI_strdup(socket.description);
}
IDP_AddToGroup(&properties, new_prop);
if (old_properties == nullptr) {
if (socket.default_attribute_name && socket.default_attribute_name[0] != '\0') {
IDP_AssignString(new_prop, socket.default_attribute_name, MAX_NAME);
}
}
else {
IDProperty *old_prop = IDP_GetPropertyFromGroup(old_properties, idprop_name.c_str());
if (old_prop != nullptr) {
/* #IDP_CopyPropertyContent replaces the UI data as well, which we don't (we only
* want to replace the values). So release it temporarily and replace it after. */
IDPropertyUIData *ui_data = new_prop->ui_data;
new_prop->ui_data = nullptr;
IDP_CopyPropertyContent(new_prop, old_prop);
if (new_prop->ui_data != nullptr) {
IDP_ui_data_free(new_prop);
}
new_prop->ui_data = ui_data;
}
}
}
}
} // namespace blender::nodes
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