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extComputationContext.h
1 //
2 // Copyright 2017 Pixar
3 //
4 // Licensed under the Apache License, Version 2.0 (the "Apache License")
5 // with the following modification; you may not use this file except in
6 // compliance with the Apache License and the following modification to it:
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24 #ifndef HD_EXT_COMPUATION_CONTEXT_H
25 #define HD_EXT_COMPUATION_CONTEXT_H
26 
27 #include "pxr/pxr.h"
28 #include "pxr/imaging/hd/api.h"
29 #include "pxr/base/vt/value.h"
30 
31 PXR_NAMESPACE_OPEN_SCOPE
32 
38 public:
39  HdExtComputationContext() = default;
40  virtual ~HdExtComputationContext();
41 
48  virtual const VtValue &GetInputValue(const TfToken &name) const = 0;
49 
56  virtual const VtValue *GetOptionalInputValuePtr(
57  const TfToken &name) const = 0;
58 
62  virtual void SetOutputValue(const TfToken &name, const VtValue &output) = 0;
63 
68  virtual void RaiseComputationError() = 0;
69 
70 private:
73  = delete;
74 };
75 
76 PXR_NAMESPACE_CLOSE_SCOPE
77 
78 #endif // HD_EXT_COMPUATION_CONTEXT_H
Interface class that defines the execution environment for the client to run a computation.
virtual const VtValue * GetOptionalInputValuePtr(const TfToken &name) const =0
Obtains the value of an named input to the computation.
virtual const VtValue & GetInputValue(const TfToken &name) const =0
Obtains the value of an named input to the computation.
Token for efficient comparison, assignment, and hashing of known strings.
Definition: token.h:89
virtual void SetOutputValue(const TfToken &name, const VtValue &output)=0
Set the value of the specified output.
virtual void RaiseComputationError()=0
Called to indicate an error occurred while executing a computation so that its output are invalid...
Provides a container which may hold any type, and provides introspection and iteration over array typ...
Definition: value.h:182