Add Chromium-only Blender WebEngine parity work

blender-5.2.0/source/blender/nodes/NOD_shader.h

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+/* SPDX-FileCopyrightText: 2005 Blender Authors
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later */
+
+/** \file
+ * \ingroup nodes
+ */
+
+#pragma once
+
+#include "BKE_node.hh"
+
+namespace blender {
+
+extern struct bke::bNodeTreeType *ntreeType_Shader;
+
+void register_node_type_sh_custom_group(bke::bNodeType *ntype);
+
+struct bNodeTreeExec *ntreeShaderBeginExecTree(struct bNodeTree *ntree);
+void ntreeShaderEndExecTree(struct bNodeTreeExec *exec);
+
+/**
+ * Find an output node of the shader tree.
+ *
+ * \note it will only return output which is NOT in the group, which isn't how
+ * render engines works but it's how the GPU shader compilation works. This we
+ * can change in the future and make it a generic function, but for now it stays
+ * private here.
+ */
+struct bNode *ntreeShaderOutputNode(struct bNodeTree *ntree, int target);
+
+/**
+ * This one needs to work on a local tree.
+ */
+void ntreeGPUMaterialNodes(struct bNodeTree *localtree, struct GPUMaterial *mat);
+
+}  // namespace blender