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/*=========================================================================
Program: Visualization Toolkit
Module: vtkOSPRayCache.h
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
/**
* @class vtkOSPRayCache
* @brief temporal cache ospray structures to speed flipbooks
*
* A temporal cache of templated objects that are created on the first
* playthrough and reused afterward to speed up animations. Cache is
* first come first serve. In other words the first 'Size' Set()
* calls will succeed, later calls will be silently ignored. Decreasing
* the size of the cache frees all previously held contents.
*
* This class is internal.
*/
#ifndef vtkOSPRayCache_h
#define vtkOSPRayCache_h
#include "vtkRenderingRayTracingModule.h" // For export macro
#include "vtkSystemIncludes.h" //dll warning suppression
#include <map> // for stl
#include <memory>
#include "RTWrapper/RTWrapper.h" // for handle types
VTK_ABI_NAMESPACE_BEGIN
template <class T>
class VTKRENDERINGRAYTRACING_EXPORT vtkOSPRayCache
{
public:
vtkOSPRayCache() { this->Size = 0; }
~vtkOSPRayCache() { this->Empty(); }
/**
* Insert a new object into the cache.
*/
void Set(double tstep, std::shared_ptr<T> payload)
{
if (this->Contents.size() >= this->Size)
{
return;
}
this->Contents[tstep] = payload;
}
/**
* Obtain an object from the cache.
* Return nullptr if none present at tstep.
*/
std::shared_ptr<T> Get(double tstep)
{
auto ret = this->Contents.find(tstep);
if (ret != this->Contents.end())
{
return ret->second;
}
return nullptr;
}
///@{
/**
* Set/Get the number of slots available in the cache.
* Default is 0.
*/
void SetSize(size_t sz)
{
if (sz == this->Size)
{
return;
}
if (sz < this->Size)
{
this->Empty();
}
this->Size = sz;
}
size_t GetSize() { return this->Size; }
///@}
/**
* Query whether cache contains tstep
*/
bool Contains(double tstep) { return this->Get(tstep) != nullptr; }
/**
* Check if the cache has space left.
*/
bool HasRoom() { return this->Contents.size() < this->Size; }
private:
// deletes all of the content in the cache
void Empty()
{
this->Contents.clear();
this->Size = 0;
}
size_t Size;
std::map<double, std::shared_ptr<T>> Contents;
};
class vtkOSPRayCacheItemObject
{
public:
vtkOSPRayCacheItemObject(RTW::Backend* be, OSPObject obj)
: backend(be)
{
object = obj;
}
~vtkOSPRayCacheItemObject() { ospRelease(object); }
OSPObject object{ nullptr };
size_t size{ 0 };
RTW::Backend* backend = nullptr;
};
VTK_ABI_NAMESPACE_END
#endif // vtkOSPRayCache_h
// VTK-HeaderTest-Exclude: vtkOSPRayCache.h
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