Add Chromium-only Blender WebEngine parity work

blender-5.2.0/intern/cycles/bvh/bvh.h

@@ -0,0 +1,92 @@
+/* SPDX-FileCopyrightText: 2009-2010 NVIDIA Corporation
+ * SPDX-FileCopyrightText: 2011-2022 Blender Foundation
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Adapted code from NVIDIA Corporation. */
+
+#pragma once
+
+#include "bvh/params.h"
+#include "util/array.h"
+#include "util/types.h"
+#include "util/unique_ptr.h"
+#include "util/vector.h"
+
+CCL_NAMESPACE_BEGIN
+
+class BoundBox;
+class BVHNode;
+class BVHParams;
+class Device;
+class DeviceScene;
+class Geometry;
+class LeafNode;
+class Object;
+class Progress;
+class Stats;
+
+#define BVH_ALIGN 4096   // NOLINT
+#define TRI_NODE_SIZE 3  // NOLINT
+
+/* Packed BVH
+ *
+ * BVH stored as it will be used for traversal on the rendering device. */
+
+struct PackedBVH {
+  /* BVH nodes storage, one node is 4x int4, and contains two bounding boxes,
+   * and child, triangle or object indexes depending on the node type */
+  array<int4> nodes;
+  /* BVH leaf nodes storage. */
+  array<int4> leaf_nodes;
+  /* object index to BVH node index mapping for instances */
+  array<int> object_node;
+  /* primitive type - triangle or strand */
+  array<int> prim_type;
+  /* Visibility visibilities for primitives. */
+  array<uint> prim_visibility;
+  /* mapping from BVH primitive index to true primitive index, as primitives
+   * may be duplicated due to spatial splits. -1 for instances. */
+  array<int> prim_index;
+  /* mapping from BVH primitive index, to the object id of that primitive. */
+  array<int> prim_object;
+  /* Time range of BVH primitive. */
+  array<float2> prim_time;
+
+  /* index of the root node. */
+  int root_index;
+
+  PackedBVH()
+  {
+    root_index = 0;
+  }
+};
+
+/* BVH */
+
+class BVH {
+ public:
+  BVHParams params;
+  vector<Geometry *> geometry;
+  vector<Object *> objects;
+
+  static unique_ptr<BVH> create(const BVHParams &params,
+                                const vector<Geometry *> &geometry,
+                                const vector<Object *> &objects,
+                                Device *device);
+  virtual ~BVH() = default;
+
+  virtual void replace_geometry(const vector<Geometry *> &geometry,
+                                const vector<Object *> &objects)
+  {
+    this->geometry = geometry;
+    this->objects = objects;
+  }
+
+ protected:
+  BVH(const BVHParams &params,
+      const vector<Geometry *> &geometry,
+      const vector<Object *> &objects);
+};
+
+CCL_NAMESPACE_END