legacyGeomSubsetSceneIndex.h

//
// Copyright 2024 Pixar
//
// Licensed under the terms set forth in the LICENSE.txt file available at
// https://openusd.org/license.
//
#ifndef PXR_IMAGING_HD_LEGACY_GEOM_SUBSET_SCENE_INDEX_H
#define PXR_IMAGING_HD_LEGACY_GEOM_SUBSET_SCENE_INDEX_H
 
#include "pxr/imaging/hd/api.h"
#include "pxr/imaging/hd/filteringSceneIndex.h"
#include "pxr/imaging/hd/sceneIndex.h"
#include "pxr/imaging/hd/sceneIndexObserver.h"
 
#include "pxr/usd/sdf/path.h"
 
#include "pxr/base/tf/declarePtrs.h"
 
#include "pxr/pxr.h"
 
#include <map>
 
PXR_NAMESPACE_OPEN_SCOPE
 
TF_DECLARE_REF_PTRS(HdLegacyGeomSubsetSceneIndex);
 
class HdLegacyGeomSubsetSceneIndex
  : public HdSingleInputFilteringSceneIndexBase
{
public:
    HD_API
    static HdLegacyGeomSubsetSceneIndexRefPtr New(
        const HdSceneIndexBaseRefPtr& inputSceneIndex);
 
    HD_API
    ~HdLegacyGeomSubsetSceneIndex() override;
 
    HD_API
    HdSceneIndexPrim GetPrim(const SdfPath& primPath) const override;
 
    HD_API
    SdfPathVector GetChildPrimPaths(const SdfPath& primPath) const override;
 
protected:
    HdLegacyGeomSubsetSceneIndex(
        const HdSceneIndexBaseRefPtr& inputSceneIndex);
 
    void _PrimsAdded(
        const HdSceneIndexBase& sender,
        const HdSceneIndexObserver::AddedPrimEntries& entries) override;
 
    void _PrimsRemoved(
        const HdSceneIndexBase& sender,
        const HdSceneIndexObserver::RemovedPrimEntries& entries) override;
 
    void _PrimsDirtied(
        const HdSceneIndexBase& sender,
        const HdSceneIndexObserver::DirtiedPrimEntries& entries) override;
 
private:
    static SdfPathVector
    _ListDelegateSubsets(
        const SdfPath& parentPath,
        const HdSceneIndexPrim& parentPrim);
 
    // Unordered map of parent path -> [subset paths...]
    // XXX: Do not use SdfPathTable because we do not want it
    // to implicitly include the extra ancestor paths.
    std::map<SdfPath, SdfPathVector> _parentPrims;
};
 
PXR_NAMESPACE_CLOSE_SCOPE
 
#endif // PXR_IMAGING_HD_LEGACY_GEOM_SUBSET_SCENE_INDEX_H