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/* SPDX-License-Identifier: Apache-2.0
* Copyright 2022 NVIDIA Corporation
* Copyright 2022 Blender Foundation */
#include "hydra/field.h"
#include "hydra/session.h"
#include "scene/image_vdb.h"
#include "scene/scene.h"
#include <pxr/imaging/hd/sceneDelegate.h>
#include <pxr/usd/sdf/assetPath.h>
HDCYCLES_NAMESPACE_OPEN_SCOPE
#if PXR_VERSION < 2108
// clang-format off
TF_DEFINE_PRIVATE_TOKENS(_tokens,
(fieldName)
);
// clang-format on
#endif
#ifdef WITH_OPENVDB
class HdCyclesVolumeLoader : public VDBImageLoader {
public:
HdCyclesVolumeLoader(const std::string &filePath, const std::string &gridName)
: VDBImageLoader(gridName)
{
openvdb::io::File file(filePath);
file.setCopyMaxBytes(0);
if (file.open()) {
grid = file.readGrid(gridName);
}
}
};
#endif
HdCyclesField::HdCyclesField(const SdfPath &bprimId, const TfToken &typeId) : HdField(bprimId)
{
}
HdCyclesField::~HdCyclesField()
{
}
HdDirtyBits HdCyclesField::GetInitialDirtyBitsMask() const
{
return DirtyBits::DirtyParams;
}
void HdCyclesField::Sync(HdSceneDelegate *sceneDelegate,
HdRenderParam *renderParam,
HdDirtyBits *dirtyBits)
{
#ifdef WITH_OPENVDB
VtValue value;
const SdfPath &id = GetId();
if (*dirtyBits & DirtyBits::DirtyParams) {
value = sceneDelegate->Get(id, HdFieldTokens->filePath);
if (value.IsHolding<SdfAssetPath>()) {
std::string filename = value.UncheckedGet<SdfAssetPath>().GetResolvedPath();
if (filename.empty()) {
filename = value.UncheckedGet<SdfAssetPath>().GetAssetPath();
}
# if PXR_VERSION >= 2108
value = sceneDelegate->Get(id, HdFieldTokens->fieldName);
# else
value = sceneDelegate->Get(id, _tokens->fieldName);
# endif
if (value.IsHolding<TfToken>()) {
ImageLoader *const loader = new HdCyclesVolumeLoader(
filename, value.UncheckedGet<TfToken>().GetString());
const SceneLock lock(renderParam);
ImageParams params;
params.frame = 0.0f;
_handle = lock.scene->image_manager->add_image(loader, params, false);
}
}
}
#endif
*dirtyBits = DirtyBits::Clean;
}
HDCYCLES_NAMESPACE_CLOSE_SCOPE
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