Add Chromium-only Blender WebEngine parity work

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

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+/* SPDX-FileCopyrightText: 2023 Blender Authors
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later */
+
+#pragma once
+
+namespace blender {
+
+void register_nodes();
+
+void register_node_type_frame();
+void register_node_type_reroute();
+void register_node_type_implicit_conversion();
+
+void register_node_type_group_input();
+void register_node_type_group_output();
+
+void register_compositor_nodes();
+void register_function_nodes();
+void register_geometry_nodes();
+void register_shader_nodes();
+void register_texture_nodes();
+
+/**
+ * This macro has three purposes:
+ * - It serves as marker in source code that `discover_nodes.py` can search for to find nodes that
+ *   need to be registered. This script generates code that calls the register functions of all
+ *   nodes.
+ * - It creates a non-static wrapper function for the registration function that is then called by
+ *   the generated code. This wrapper is necessary because the normal registration is static and
+ *   can't be called from somewhere else. It could be made non-static, but then it would require
+ *   a declaration to avoid warnings.
+ * - It reduces the amount of "magic" with how node registration works. The script could also
+ *   search for `node_register` functions directly, but then it would not be apparent in the code
+ *   that anything unusual is going on.
+ */
+#define NOD_REGISTER_NODE(REGISTER_FUNC) \
+  void REGISTER_FUNC##_discover(); \
+  void REGISTER_FUNC##_discover() \
+  { \
+    REGISTER_FUNC(); \
+  }
+
+}  // namespace blender