Add Chromium-only Blender WebEngine parity work

blender-5.2.0/source/blender/nodes/NOD_dependencies.hh

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+/* SPDX-FileCopyrightText: 2024 Blender Authors
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later */
+
+#pragma once
+
+#include "BLI_map.hh"
+
+namespace blender {
+
+struct ID;
+struct Object;
+struct bNodeTree;
+
+namespace nodes {
+
+/**
+ * Gathers dependencies that the node tree requires before it can be evaluated.
+ */
+struct EvalDependencies {
+  /**
+   * Stores additional dependency information for objects. It can be more efficient to only depend
+   * on an object partially.
+   */
+  struct ObjectDependencyInfo {
+    bool transform = false;
+    bool geometry = false;
+    bool camera_parameters = false;
+    bool pose = false;
+
+    friend bool operator==(const ObjectDependencyInfo &a, const ObjectDependencyInfo &b) = default;
+  };
+  static constexpr ObjectDependencyInfo all_object_deps{true, true, true, true};
+
+  /**
+   * Maps `session_uid` to the corresponding data-block.
+   * The data-block pointer is not used as key in this map, so that it can be modified in
+   * #node_foreach_id.
+   */
+  Map<uint32_t, ID *> ids;
+
+  /** Additional information for object dependencies. */
+  Map<uint32_t, ObjectDependencyInfo> objects_info;
+
+  bool needs_own_transform = false;
+  bool needs_active_camera = false;
+  bool needs_scene_render_params = false;
+  bool time_dependent = false;
+
+  /**
+   * Adds a generic data-block dependency. Note that this does not add a dependency to e.g. the
+   * transform or geometry of an object. If that is desired, use #add_object or
+   * #add_generic_id_full instead.
+   */
+  void add_generic_id(ID *id);
+
+  /**
+   * Adds a data-block as dependency. For objects, it also adds a dependency to the transform and
+   * geometry.
+   */
+  void add_generic_id_full(ID *id);
+
+  /**
+   * Add an object as dependency. It's customizable whether e.g. the transform and/or geometry is
+   * required.
+   */
+  void add_object(Object *object, const ObjectDependencyInfo &object_deps = all_object_deps);
+
+  /**
+   * Add all the given dependencies to this one.
+   */
+  void merge(const EvalDependencies &other);
+
+  friend bool operator==(const EvalDependencies &a, const EvalDependencies &b) = default;
+};
+
+/**
+ * Finds all evaluation dependencies for the given node. This does not include dependencies that
+ * are passed into the node group. It also may not contain all data-blocks referenced by the node
+ * tree if some of them can statically be detected to not be used by the evaluation.
+ */
+EvalDependencies gather_eval_dependencies_recursive(const bNodeTree &ntree);
+/**
+ * Same as above, but assumes that dependencies are already cached on the referenced node groups.
+ */
+EvalDependencies gather_eval_dependencies_with_cache(const bNodeTree &ntree);
+
+}  // namespace nodes
+}  // namespace blender