primTypePruningSceneIndex.h

//
// Copyright 2023 Pixar
//
// Licensed under the terms set forth in the LICENSE.txt file available at
// https://openusd.org/license.
#ifndef PXR_IMAGING_HDSI_PRIM_TYPE_PRUNING_SCENE_INDEX_H
#define PXR_IMAGING_HDSI_PRIM_TYPE_PRUNING_SCENE_INDEX_H
 
#include "pxr/pxr.h"
 
#include "pxr/imaging/hd/filteringSceneIndex.h"
#include "pxr/imaging/hdsi/api.h"
#include "pxr/usd/sdf/pathTable.h"
 
PXR_NAMESPACE_OPEN_SCOPE
 
#define HDSI_PRIM_TYPE_PRUNING_SCENE_INDEX_TOKENS \
    (primTypes)                                   \
    (bindingToken)                                \
    (doNotPruneNonPrimPaths)
 
TF_DECLARE_PUBLIC_TOKENS(HdsiPrimTypePruningSceneIndexTokens, HDSI_API,
                         HDSI_PRIM_TYPE_PRUNING_SCENE_INDEX_TOKENS);
 
TF_DECLARE_WEAK_AND_REF_PTRS(HdsiPrimTypePruningSceneIndex);
 
class HdsiPrimTypePruningSceneIndex final
    : public HdSingleInputFilteringSceneIndexBase
{
public:
    HDSI_API
    static HdsiPrimTypePruningSceneIndexRefPtr
    New(HdSceneIndexBaseRefPtr const &inputSceneIndex,
        HdContainerDataSourceHandle const &inputArgs);
 
    HDSI_API
    bool GetEnabled() const;
    HDSI_API
    void SetEnabled(bool);
 
public: // HdSceneIndex overrides
    HDSI_API
    HdSceneIndexPrim GetPrim(const SdfPath &primPath) const override;
    HDSI_API
    SdfPathVector GetChildPrimPaths(const SdfPath &primPath) const override;
 
    const TfToken &GetBindingToken() const { return _bindingToken; }
 
protected: // HdSingleInputFilteringSceneIndexBase overrides
    HDSI_API
    void _PrimsAdded(
        const HdSceneIndexBase &sender,
        const HdSceneIndexObserver::AddedPrimEntries &entries) override;
    HDSI_API
    void _PrimsRemoved(
        const HdSceneIndexBase &sender,
        const HdSceneIndexObserver::RemovedPrimEntries &entries) override;
    HDSI_API
    void _PrimsDirtied(
        const HdSceneIndexBase &sender,
        const HdSceneIndexObserver::DirtiedPrimEntries &entries) override;
 
protected:
    HDSI_API
    HdsiPrimTypePruningSceneIndex(
        HdSceneIndexBaseRefPtr const &inputSceneIndex,
        HdContainerDataSourceHandle const &inputArgs);
    HDSI_API
    ~HdsiPrimTypePruningSceneIndex() override;
 
private:
    // Should prim be pruned based on its type?
    bool _PruneType(const TfToken &primType) const;
    // Should prim be pruned based on its path?
    bool _PrunePath(const SdfPath &path) const;
 
    const TfTokenVector _primTypes;
    const TfToken _bindingToken;
    const bool _doNotPruneNonPrimPaths;
 
    // Track pruned prims in a SdfPathTable.  A value of true
    // indicates a prim was filtered at that path.
    using _PruneMap = SdfPathTable<bool>;
    _PruneMap _pruneMap;
 
    bool _enabled;
};
 
PXR_NAMESPACE_CLOSE_SCOPE
 
#endif