Jacques Lucke
25e307d725
The purpose of `NodeTreeRef` was to speed up various queries on a read-only `bNodeTree`. Not that we have runtime data in nodes and sockets, we can also store the result of some queries there. This has some benefits: * No need for a read-only separate node tree data structure which increased complexity. * Makes it easier to reuse cached queries in more parts of Blender that can benefit from it. A downside is that we loose some type safety that we got by having different types for input and output sockets, as well as internal and non-internal links. This patch also refactors `DerivedNodeTree` so that it does not use `NodeTreeRef` anymore, but uses `bNodeTree` directly instead. To provide a convenient API (that is also close to what `NodeTreeRef` has), a new approach is implemented: `bNodeTree`, `bNode`, `bNodeSocket` and `bNodeLink` now have C++ methods declared in `DNA_node_types.h` which are implemented in `BKE_node_runtime.hh`. To make this work, `makesdna` now skips c++ sections when parsing dna header files. No user visible changes are expected. Differential Revision: https://developer.blender.org/D15491
123 lines
2.8 KiB
C++
123 lines
2.8 KiB
C++
/* SPDX-License-Identifier: GPL-2.0-or-later */
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#pragma once
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#include "FN_multi_function.hh"
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#include "DNA_node_types.h"
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#include "NOD_derived_node_tree.hh"
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namespace blender::nodes {
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using namespace fn::multi_function_types;
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class NodeMultiFunctions;
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/**
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* Utility class to help nodes build a multi-function for themselves.
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*/
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class NodeMultiFunctionBuilder : NonCopyable, NonMovable {
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private:
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const bNode &node_;
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const bNodeTree &tree_;
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std::shared_ptr<MultiFunction> owned_built_fn_;
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const MultiFunction *built_fn_ = nullptr;
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friend NodeMultiFunctions;
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public:
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NodeMultiFunctionBuilder(const bNode &node, const bNodeTree &tree);
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/**
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* Assign a multi-function for the current node. The input and output parameters of the function
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* have to match the available sockets in the node.
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*/
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void set_matching_fn(const MultiFunction *fn);
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void set_matching_fn(const MultiFunction &fn);
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/**
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* Utility method for creating and assigning a multi-function when it can't have a static
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* lifetime.
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*/
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template<typename T, typename... Args> void construct_and_set_matching_fn(Args &&...args);
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const bNode &node();
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const bNodeTree &tree();
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};
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/**
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* Gives access to multi-functions for all nodes in a node tree that support them.
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*/
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class NodeMultiFunctions {
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public:
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struct Item {
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const MultiFunction *fn = nullptr;
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std::shared_ptr<MultiFunction> owned_fn;
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};
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private:
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Map<const bNode *, Item> map_;
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public:
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NodeMultiFunctions(const DerivedNodeTree &tree);
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const Item &try_get(const DNode &node) const;
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};
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/* -------------------------------------------------------------------- */
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/** \name #NodeMultiFunctionBuilder Inline Methods
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* \{ */
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inline NodeMultiFunctionBuilder::NodeMultiFunctionBuilder(const bNode &node, const bNodeTree &tree)
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: node_(node), tree_(tree)
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{
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}
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inline const bNode &NodeMultiFunctionBuilder::node()
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{
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return node_;
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}
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inline const bNodeTree &NodeMultiFunctionBuilder::tree()
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{
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return tree_;
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}
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inline void NodeMultiFunctionBuilder::set_matching_fn(const MultiFunction *fn)
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{
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built_fn_ = fn;
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}
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inline void NodeMultiFunctionBuilder::set_matching_fn(const MultiFunction &fn)
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{
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built_fn_ = &fn;
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}
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template<typename T, typename... Args>
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inline void NodeMultiFunctionBuilder::construct_and_set_matching_fn(Args &&...args)
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{
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owned_built_fn_ = std::make_shared<T>(std::forward<Args>(args)...);
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built_fn_ = &*owned_built_fn_;
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}
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/** \} */
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/* -------------------------------------------------------------------- */
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/** \name #NodeMultiFunctions Inline Methods
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* \{ */
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inline const NodeMultiFunctions::Item &NodeMultiFunctions::try_get(const DNode &node) const
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{
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static Item empty_item;
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const Item *item = map_.lookup_ptr(node.bnode());
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if (item == nullptr) {
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return empty_item;
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}
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return *item;
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}
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/** \} */
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} // namespace blender::nodes
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