extComputationContext.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_EXT_COMPUTATION_CONTEXT_H
#define PXR_IMAGING_HD_EXT_COMPUTATION_CONTEXT_H
 
#include "pxr/pxr.h"
#include "pxr/imaging/hd/api.h"
#include "pxr/base/vt/value.h"
 
PXR_NAMESPACE_OPEN_SCOPE
 
class HdExtComputationContext {
public:
    HdExtComputationContext() = default;
    virtual ~HdExtComputationContext();
 
    virtual const VtValue &GetInputValue(const TfToken &name) const = 0;
 
    virtual const VtValue *GetOptionalInputValuePtr(
                                                 const TfToken &name) const = 0;
 
    virtual void SetOutputValue(const TfToken &name, const VtValue &output) = 0;
 
    virtual void RaiseComputationError() = 0;
 
private:
    HdExtComputationContext(const HdExtComputationContext &)           = delete;
    HdExtComputationContext &operator = (const HdExtComputationContext &)
                                                                       = delete;
};
 
PXR_NAMESPACE_CLOSE_SCOPE
 
#endif // PXR_IMAGING_HD_EXT_COMPUTATION_CONTEXT_H