renderDelegate.h

//
// Copyright 2017 Pixar
//
// Licensed under the terms set forth in the LICENSE.txt file available at
// https://openusd.org/license.
#ifndef PXR_IMAGING_HD_ST_RENDER_DELEGATE_H
#define PXR_IMAGING_HD_ST_RENDER_DELEGATE_H
 
#include "pxr/pxr.h"
#include "pxr/imaging/hdSt/api.h"
#include "pxr/imaging/hd/renderDelegate.h"
 
#include <memory>
#include <mutex>
 
PXR_NAMESPACE_OPEN_SCOPE
 
class Hgi;
class HdStRenderParam;
using HdStDrawItemsCacheUniquePtr =
    std::unique_ptr<class HdSt_DrawItemsCache>;
using HdStDrawItemsCachePtr = HdSt_DrawItemsCache *;
 
using HdStResourceRegistrySharedPtr = 
    std::shared_ptr<class HdStResourceRegistry>;
 
struct HdRenderDelegateInfo;
 
class HdStRenderDelegate final : public HdRenderDelegate
{
public:
    HDST_API
    HdStRenderDelegate();
    HDST_API
    HdStRenderDelegate(HdRenderSettingsMap const& settingsMap);
 
    HDST_API
    ~HdStRenderDelegate() override;
    
    // ---------------------------------------------------------------------- //
    // ---------------------------------------------------------------------- //
 
    HDST_API
    void SetDrivers(HdDriverVector const& drivers) override;
 
    HDST_API
    HdRenderParam *GetRenderParam() const override;
 
    HDST_API
    const TfTokenVector &GetSupportedRprimTypes() const override;
    HDST_API
    const TfTokenVector &GetSupportedSprimTypes() const override;
    HDST_API
    const TfTokenVector &GetSupportedBprimTypes() const override;
    HDST_API
    HdResourceRegistrySharedPtr GetResourceRegistry() const override;
 
    HDST_API
    HdRenderPassSharedPtr CreateRenderPass(HdRenderIndex *index,
                HdRprimCollection const& collection) override;
    HDST_API
    HdRenderPassStateSharedPtr CreateRenderPassState() const override;
 
    HDST_API
    HdInstancer *CreateInstancer(HdSceneDelegate *delegate,
                                 SdfPath const& id) override;
 
    HDST_API
    void DestroyInstancer(HdInstancer *instancer) override;
 
    HDST_API
    HdRprim *CreateRprim(TfToken const& typeId,
                         SdfPath const& rprimId) override;
    HDST_API
    void DestroyRprim(HdRprim *rPrim) override;
 
    HDST_API
    HdSprim *CreateSprim(TfToken const& typeId,
                         SdfPath const& sprimId) override;
    HDST_API
    HdSprim *CreateFallbackSprim(TfToken const& typeId) override;
    HDST_API
    void DestroySprim(HdSprim *sPrim) override;
 
    HDST_API
    HdBprim *CreateBprim(TfToken const& typeId,
                         SdfPath const& bprimId) override;
    HDST_API
    HdBprim *CreateFallbackBprim(TfToken const& typeId) override;
    HDST_API
    void DestroyBprim(HdBprim *bPrim) override;
 
    HDST_API
    void CommitResources(HdChangeTracker *tracker) override;
 
    HDST_API
    TfTokenVector GetMaterialRenderContexts() const override;
 
    HDST_API
    TfTokenVector GetShaderSourceTypes() const override;
 
    HDST_API
    bool IsPrimvarFilteringNeeded() const override;
 
    HDST_API
    HdRenderSettingDescriptorList
        GetRenderSettingDescriptors() const override;
 
    HDST_API
    VtDictionary GetRenderStats() const override;
 
    HDST_API
    HdAovDescriptor
        GetDefaultAovDescriptor(TfToken const& name) const override;
 
    HDST_API
    bool RequiresStormTasks() const override;
 
    // ---------------------------------------------------------------------- //
    // ---------------------------------------------------------------------- //
 
    // Returns whether HdStRenderDelegate can run on the given hardware.
    HDST_API
    static bool IsSupported(
        const HdRendererCreateArgsSchema &,
        std::string * reasonWhyNot = nullptr);
 
    // Returns a raw pointer to the draw items cache owned (solely) by the
    // render delegate.
    HDST_API
    HdStDrawItemsCachePtr GetDrawItemsCache() const;
 
    // Returns Hydra graphics interface
    HDST_API
    Hgi* GetHgi();
 
    HDST_API
    static
    const HdRenderDelegateInfo &GetRenderDelegateInfo();
 
    HDST_API
    static bool IsEnabledNativeSphereRenderingSupport();
    
private:
    void _ApplyTextureSettings();
    HdSprim *_CreateFallbackMaterialPrim();
 
    HdStRenderDelegate(const HdStRenderDelegate &)             = delete;
    HdStRenderDelegate &operator =(const HdStRenderDelegate &) = delete;
 
    static const TfTokenVector SUPPORTED_RPRIM_TYPES;
    static const TfTokenVector SUPPORTED_SPRIM_TYPES;
 
    // Resource registry used in this render delegate
    HdStResourceRegistrySharedPtr _resourceRegistry;
 
    HdRenderSettingDescriptorList _settingDescriptors;
 
    Hgi* _hgi;
 
    std::unique_ptr<HdStRenderParam> _renderParam;
 
    HdStDrawItemsCacheUniquePtr _drawItemsCache;
};
 
 
PXR_NAMESPACE_CLOSE_SCOPE
 
#endif // PXR_IMAGING_HD_ST_RENDER_DELEGATE_H