dataSourceLegacyPrim.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_DATA_SOURCE_LEGACY_PRIM_H
#define PXR_IMAGING_HD_DATA_SOURCE_LEGACY_PRIM_H
 
#include "pxr/imaging/hd/api.h"
#include "pxr/imaging/hd/dataSource.h"
#include "pxr/imaging/hd/dataSourceLocator.h"
 
#include "pxr/usd/sdf/path.h"
 
#include "pxr/base/tf/staticTokens.h"
#include "pxr/base/tf/token.h"
 
#include "pxr/pxr.h"
 
#include <atomic>
 
PXR_NAMESPACE_OPEN_SCOPE
 
class HdSceneDelegate;
class HdExtComputationContext;
 
#define HD_LEGACY_PRIMTYPE_TOKENS  \
    /* Bprims */                   \
    (openvdbAsset)                 \
    (field3dAsset)
 
TF_DECLARE_PUBLIC_TOKENS(HdLegacyPrimTypeTokens, HD_API, 
                         HD_LEGACY_PRIMTYPE_TOKENS);
 
class HdExtComputationCallbackDataSource : public HdDataSourceBase
{
public:
    HD_DECLARE_DATASOURCE(HdExtComputationCallbackDataSource);
 
    HdExtComputationCallbackDataSource(
        const SdfPath &id, HdSceneDelegate *sceneDelegate)
    : _id(id), _sceneDelegate(sceneDelegate) {}
 
    HD_API
    void Invoke(HdExtComputationContext *context);
 
private:
    SdfPath _id;
    HdSceneDelegate *_sceneDelegate;
};
 
HD_DECLARE_DATASOURCE_HANDLES(HdExtComputationCallbackDataSource);
 
class HdDataSourceLegacyPrim : public HdContainerDataSource
{
public:
    HD_DECLARE_DATASOURCE(HdDataSourceLegacyPrim);
 
    TfTokenVector GetNames() override;
    HdDataSourceBaseHandle Get(const TfToken &name) override;
 
    void PrimDirtied(const HdDataSourceLocatorSet &locators);
 
    static const HdDataSourceLocatorSet &GetCachedLocators();
 
protected:
    HdDataSourceLegacyPrim(
        const SdfPath& id, 
        const TfToken& type, 
        HdSceneDelegate *sceneDelegate);
 
private:
    HdDataSourceBaseHandle _GetPrimvarsDataSource();
    HdDataSourceBaseHandle _GetExtComputationPrimvarsDataSource();
    HdDataSourceBaseHandle _GetMaterialBindingsDataSource();
    HdDataSourceBaseHandle _GetXformDataSource();
    HdDataSourceBaseHandle _GetMaterialDataSource();
    HdDataSourceBaseHandle _GetIntegratorDataSource();
    HdDataSourceBaseHandle _GetSampleFilterDataSource();
    HdDataSourceBaseHandle _GetDisplayFilterDataSource();
    HdDataSourceBaseHandle _GetDisplayStyleDataSource();
    HdDataSourceBaseHandle _GetInstancedByDataSource();
    HdDataSourceBaseHandle _GetInstancerTopologyDataSource();
    HdDataSourceBaseHandle _GetVolumeFieldBindingDataSource();
    HdDataSourceBaseHandle _GetCoordSysBindingDataSource();
    HdDataSourceBaseHandle _GetVisibilityDataSource();
    HdDataSourceBaseHandle _GetPurposeDataSource();
    HdDataSourceBaseHandle _GetExtentDataSource();
    HdDataSourceBaseHandle _GetCategoriesDataSource();
    HdDataSourceBaseHandle _GetInstanceCategoriesDataSource();
 
    bool _IsLight();
    bool _IsInstanceable();
 
protected:
    SdfPath _id;
    TfToken _type;
    HdSceneDelegate *_sceneDelegate;
 
private:
    std::atomic_bool _primvarsBuilt;
    bool _extComputationPrimvarsBuilt : 1;
 
    HdContainerDataSourceAtomicHandle _primvars;
    HdContainerDataSourceHandle _extComputationPrimvars;
 
    // Note: _instancerTopology needs to be an atomic handle, since
    // some downstream customers of it (render index sync, hdSt instancer sync)
    // are not threadsafe.
    HdContainerDataSourceAtomicHandle _instancerTopology;
};
 
HD_DECLARE_DATASOURCE_HANDLES(HdDataSourceLegacyPrim);
 
bool HdLegacyPrimTypeIsVolumeField(TfToken const &primType);
 
PXR_NAMESPACE_CLOSE_SCOPE
 
#endif