Add Chromium-only Blender WebEngine parity work

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

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+/* 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 <cfloat>
+
+#include "bvh/params.h"
+#include "bvh/unaligned.h"
+
+#include "util/array.h"
+#include "util/task.h"
+#include "util/unique_ptr.h"
+#include "util/vector.h"
+
+CCL_NAMESPACE_BEGIN
+
+class Boundbox;
+class BVHBuildTask;
+class BVHNode;
+class BVHSpatialSplitBuildTask;
+class BVHParams;
+class InnerNode;
+class Geometry;
+class Hair;
+class Mesh;
+class Object;
+class PointCloud;
+class Progress;
+
+/* BVH Builder */
+
+class BVHBuild {
+ public:
+  /* Constructor/Destructor */
+  BVHBuild(const vector<Object *> &objects,
+           array<int> &prim_type,
+           array<int> &prim_index,
+           array<int> &prim_object,
+           array<float2> &prim_time,
+           const BVHParams &params,
+           Progress &progress);
+  ~BVHBuild();
+
+  unique_ptr<BVHNode> run();
+
+ protected:
+  friend class BVHMixedSplit;
+  friend class BVHObjectSplit;
+  friend class BVHSpatialSplit;
+  friend class BVHBuildTask;
+  friend class BVHSpatialSplitBuildTask;
+  friend class BVHObjectBinning;
+
+  /* Adding references. */
+  void add_reference_triangles(BoundBox &root,
+                               BoundBox &center,
+                               Mesh *mesh,
+                               const int object_index);
+  void add_reference_curves(BoundBox &root, BoundBox &center, Hair *hair, const int object_index);
+  void add_reference_points(BoundBox &root, BoundBox &center, PointCloud *pointcloud, const int i);
+  void add_reference_geometry(BoundBox &root,
+                              BoundBox &center,
+                              Geometry *geom,
+                              const int object_index);
+  void add_reference_object(BoundBox &root, BoundBox &center, Object *ob, const int i);
+  void add_references(BVHRange &root);
+
+  /* Building. */
+  unique_ptr<BVHNode> build_node(const BVHRange &range,
+                                 vector<BVHReference> &references,
+                                 const int level,
+                                 BVHSpatialStorage *storage);
+  unique_ptr<BVHNode> build_node(const BVHObjectBinning &range, const int level);
+  unique_ptr<BVHNode> create_leaf_node(const BVHRange &range,
+                                       const vector<BVHReference> &references);
+  unique_ptr<BVHNode> create_object_leaf_nodes(const BVHReference *ref,
+                                               const int start,
+                                               const int num);
+
+  bool range_within_max_leaf_size(const BVHRange &range,
+                                  const vector<BVHReference> &references) const;
+
+  /* Threads. */
+  enum { THREAD_TASK_SIZE = 4096 };
+  void thread_build_node(InnerNode *inner,
+                         const int child,
+                         const BVHObjectBinning &range,
+                         const int level);
+  void thread_build_spatial_split_node(InnerNode *inner,
+                                       const int child,
+                                       const BVHRange &range,
+                                       vector<BVHReference> &references,
+                                       int level);
+  thread_mutex build_mutex;
+
+  /* Progress. */
+  void progress_update();
+
+  /* Tree rotations. */
+  void rotate(BVHNode *node, const int max_depth);
+  void rotate(BVHNode *node, const int max_depth, const int iterations);
+
+  /* Objects and primitive references. */
+  vector<Object *> objects;
+  vector<BVHReference> references;
+  int num_original_references;
+
+  /* Output primitive indexes and objects. */
+  array<int> &prim_type;
+  array<int> &prim_index;
+  array<int> &prim_object;
+  array<float2> &prim_time;
+
+  bool need_prim_time;
+
+  /* Build parameters. */
+  BVHParams params;
+
+  /* Progress reporting. */
+  Progress &progress;
+  double progress_start_time;
+  size_t progress_count;
+  size_t progress_total;
+  size_t progress_original_total;
+
+  /* Spatial splitting. */
+  float spatial_min_overlap;
+  enumerable_thread_specific<BVHSpatialStorage> spatial_storage;
+  size_t spatial_free_index;
+  thread_spin_lock spatial_spin_lock;
+
+  /* Threads. */
+  TaskPool task_pool;
+
+  /* Unaligned building. */
+  BVHUnaligned unaligned_heuristic;
+};
+
+CCL_NAMESPACE_END