prefixingSceneIndex.h

//
// Copyright 2021 Pixar
//
// Licensed under the terms set forth in the LICENSE.txt file available at
// https://openusd.org/license.
//
#ifndef PXR_IMAGING_HD_PREFIXING_SCENE_INDEX_H
#define PXR_IMAGING_HD_PREFIXING_SCENE_INDEX_H
 
#include "pxr/imaging/hd/api.h"
#include "pxr/imaging/hd/filteringSceneIndex.h"
 
PXR_NAMESPACE_OPEN_SCOPE
 
class HdPrefixingSceneIndex;
TF_DECLARE_REF_PTRS(HdPrefixingSceneIndex);
 
class HdPrefixingSceneIndex : public HdSingleInputFilteringSceneIndexBase
{
public:
 
    static HdPrefixingSceneIndexRefPtr New(
            const HdSceneIndexBaseRefPtr &inputScene, const SdfPath &prefix) 
    {
        return TfCreateRefPtr(new HdPrefixingSceneIndex(inputScene, prefix));
    }
 
    // satisfying HdSceneIndexBase
    HD_API 
    HdSceneIndexPrim GetPrim(const SdfPath &primPath) const override;
 
    HD_API
    SdfPathVector GetChildPrimPaths(const SdfPath &primPath) const override;
 
protected:
 
    HD_API
    HdPrefixingSceneIndex(const HdSceneIndexBaseRefPtr &inputScene,
        const SdfPath &prefix);
 
    // satisfying HdSingleInputFilteringSceneIndexBase
    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:
 
    SdfPath _AddPathPrefix(const SdfPath &primPath) const;
 
    SdfPath _RemovePathPrefix(const SdfPath &primPath) const;
 
    const SdfPath _prefix;
};
 
PXR_NAMESPACE_CLOSE_SCOPE
 
#endif