bufferArrayRange.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_BUFFER_ARRAY_RANGE_H
#define PXR_IMAGING_HD_ST_BUFFER_ARRAY_RANGE_H
 
#include "pxr/pxr.h"
#include "pxr/imaging/hdSt/api.h"
#include "pxr/imaging/hd/version.h"
#include "pxr/base/tf/token.h"
#include "pxr/imaging/hd/bufferArrayRange.h"
 
#include <memory>
 
PXR_NAMESPACE_OPEN_SCOPE
 
 
class HdBufferArrayGL;
class HdStResourceRegistry;
 
using HdStBufferArrayRangeSharedPtr = 
    std::shared_ptr<class HdStBufferArrayRange>;
 
class HdStBufferResource;
 
using HdStBufferResourceSharedPtr = 
    std::shared_ptr<class HdStBufferResource>;
using HdStBufferResourceNamedList =
    std::vector< std::pair<TfToken, HdStBufferResourceSharedPtr> >;
 
class HdStBufferArrayRange : public HdBufferArrayRange 
{
public:
    HdStBufferArrayRange(HdStResourceRegistry* resourceRegistry);
 
    HDST_API
    virtual ~HdStBufferArrayRange();
 
    virtual HdStBufferResourceSharedPtr GetResource() const = 0;
 
    virtual HdStBufferResourceSharedPtr GetResource(TfToken const& name) = 0;
 
    virtual HdStBufferResourceNamedList const& GetResources() const = 0;
 
    HDST_API
    virtual void GetBufferSpecs(HdBufferSpecVector *bufferSpecs) const override;
 
    virtual int GetElementStride() const {
        return 0;
    }
    
protected:
    HdStResourceRegistry* GetResourceRegistry();
 
    HdStResourceRegistry* GetResourceRegistry() const;
    
private:
    HdStResourceRegistry* _resourceRegistry;
};
 
HDST_API
std::ostream &operator <<(std::ostream &out,
                          const HdStBufferArrayRange &self);
 
class HdStBufferArrayRangeContainer
{
public:
    HdStBufferArrayRangeContainer(int size) : _ranges(size) { }
 
    HDST_API
    void Set(int index, HdStBufferArrayRangeSharedPtr const &range);
 
    // is out of range or not yet set.
    HDST_API
    HdStBufferArrayRangeSharedPtr const &Get(int index) const;
 
private:
    std::vector<HdStBufferArrayRangeSharedPtr> _ranges;
};
 
 
PXR_NAMESPACE_CLOSE_SCOPE
 
#endif  // HD_BUFFER_ARRAY_RANGE_GL_H