strategyBase.h

//
// Copyright 2016 Pixar
//
// Licensed under the terms set forth in the LICENSE.txt file available at
// https://openusd.org/license.
//
#ifndef PXR_IMAGING_HD_ST_STRATEGY_BASE_H
#define PXR_IMAGING_HD_ST_STRATEGY_BASE_H
 
#include "pxr/pxr.h"
#include "pxr/imaging/hdSt/api.h"
 
#include "pxr/imaging/hd/bufferSpec.h"
#include "pxr/imaging/hd/bufferArray.h"
 
#include "pxr/base/tf/token.h"
#include "pxr/base/vt/dictionary.h"
 
#include <memory>
 
PXR_NAMESPACE_OPEN_SCOPE
 
 
using HdBufferArraySharedPtr = std::shared_ptr<class HdBufferArray>;
using HdBufferArrayRangeSharedPtr = std::shared_ptr<class HdBufferArrayRange>;
 
class HdStAggregationStrategy {
public:
    typedef size_t AggregationId;
 
    HDST_API
    virtual ~HdStAggregationStrategy();
 
    virtual HdBufferArraySharedPtr CreateBufferArray(
        TfToken const &role,
        HdBufferSpecVector const &bufferSpecs,
        HdBufferArrayUsageHint usageHint) = 0;
 
    virtual HdBufferArrayRangeSharedPtr CreateBufferArrayRange() = 0;
        
 
    virtual AggregationId ComputeAggregationId(
        HdBufferSpecVector const &bufferSpecs,
        HdBufferArrayUsageHint usageHint) const = 0;
 
    virtual HdBufferSpecVector GetBufferSpecs(
        HdBufferArraySharedPtr const &bufferArray) const = 0;
 
    virtual size_t GetResourceAllocation(
        HdBufferArraySharedPtr const &bufferArray, 
        VtDictionary &result) const = 0;
 
    HDST_API
    virtual void Flush() {}
};
 
 
PXR_NAMESPACE_CLOSE_SCOPE
 
#endif  // PXR_IMAGING_HD_ST_STRATEGY_BASE_H