Add Chromium-only Blender WebEngine parity work

blender-5.2.0/intern/cycles/scene/procedural.h

@@ -0,0 +1,68 @@
+/* SPDX-FileCopyrightText: 2011-2022 Blender Foundation
+ *
+ * SPDX-License-Identifier: Apache-2.0 */
+
+#pragma once
+
+#include "graph/node.h"
+
+#include "util/unique_ptr_vector.h"
+
+CCL_NAMESPACE_BEGIN
+
+class Progress;
+class Scene;
+
+/* A Procedural is a Node which can create other Nodes before rendering starts.
+ *
+ * The Procedural is supposed to be the owner of any nodes that it creates. It can also create
+ * Nodes directly in the Scene (through Scene.create_node), it should still be set as the owner of
+ * those Nodes.
+ */
+class Procedural : public Node, public NodeOwner {
+ public:
+  NODE_ABSTRACT_DECLARE
+
+  explicit Procedural(const NodeType *type);
+  ~Procedural() override;
+
+  /* Called each time the ProceduralManager is tagged for an update, this function is the entry
+   * point for the data generated by this Procedural. */
+  virtual void generate(Scene *scene, Progress &progress) = 0;
+
+  /* Create a node and set this Procedural as the owner. */
+  template<typename T> T *create_node()
+  {
+    unique_ptr<T> node = make_unique<T>();
+    T *node_ptr = node.get();
+    node->set_owner(this);
+    nodes.push_back(std::move(node));
+    return node_ptr;
+  }
+
+  /* Delete a Node created and owned by this Procedural. */
+  template<typename T> void delete_node(T *node)
+  {
+    assert(node->get_owner() == this);
+    nodes.erase(node);
+  }
+
+ protected:
+  unique_ptr_vector<Node> nodes;
+};
+
+class ProceduralManager {
+  bool need_update_;
+
+ public:
+  ProceduralManager();
+  ~ProceduralManager();
+
+  void update(Scene *scene, Progress &progress);
+
+  void tag_update();
+
+  bool need_update() const;
+};
+
+CCL_NAMESPACE_END