Add Chromium-only Blender WebEngine parity work

blender-5.2.0/intern/cycles/scene/image_vdb.h

@@ -0,0 +1,76 @@
+/* SPDX-FileCopyrightText: 2011-2022 Blender Foundation
+ *
+ * SPDX-License-Identifier: Apache-2.0 */
+
+#pragma once
+
+#ifdef WITH_OPENVDB
+#  include <openvdb/openvdb.h>
+#endif
+#ifdef WITH_NANOVDB
+#  include <nanovdb/NanoVDB.h>
+#  if NANOVDB_MAJOR_VERSION_NUMBER > 32 || \
+      (NANOVDB_MAJOR_VERSION_NUMBER == 32 && NANOVDB_MINOR_VERSION_NUMBER >= 7)
+#    include <nanovdb/GridHandle.h>
+#  else
+#    include <nanovdb/util/GridHandle.h>
+#  endif
+#endif
+
+#include "scene/image_loader.h"
+
+#include "util/transform.h"
+
+CCL_NAMESPACE_BEGIN
+
+class VDBImageLoader : public ImageLoader {
+ public:
+#ifdef WITH_OPENVDB
+  VDBImageLoader(openvdb::GridBase::ConstPtr grid_,
+                 const string &grid_name,
+                 const float clipping = 0.001f);
+#endif
+  VDBImageLoader(const string &grid_name, const float clipping = 0.001f);
+  ~VDBImageLoader() override;
+
+  bool load_metadata(ImageMetaData &metadata,
+                     const ImageLoaderParams &params,
+                     Progress &progress) override;
+
+  bool load_pixels(const ImageMetaData &metadata, void *pixels) override;
+
+  string name() const override;
+
+  bool equals(const ImageLoader &other) const override;
+
+  void cleanup() override;
+
+  bool is_vdb_loader() const override;
+
+#ifdef WITH_OPENVDB
+  openvdb::GridBase::ConstPtr get_grid();
+#endif
+
+ protected:
+  virtual void load_grid() {}
+
+  void grid_from_dense_voxels(const size_t width,
+                              const size_t height,
+                              const size_t depth,
+                              const int channels,
+                              const float *voxels,
+                              Transform transform_3d);
+
+  string grid_name;
+  float clipping = 0.001f;
+#ifdef WITH_OPENVDB
+  openvdb::GridBase::ConstPtr grid;
+  openvdb::CoordBBox bbox;
+#endif
+#ifdef WITH_NANOVDB
+  nanovdb::GridHandle<> nanogrid;
+  int precision = 16;
+#endif
+};
+
+CCL_NAMESPACE_END