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/*=========================================================================
Program: Visualization Toolkit
Module: vtkPHardwareSelector.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 vtkPHardwareSelector
* @brief vtkHardwareSelector useful for parallel
* rendering.
*
* vtkPHardwareSelector is a vtkHardwareSelector that is parallel aware. It
* relies on the fact that the application is going to use some other mechanism
* to ensure that renders are synchronized among windows on all processes. The
* synchronization happens from the root node. When the root node renders, all
* processes render. Only vtkPHardwareSelector instance on the root node
* triggers the renders. All other processes, simply listen to the StartEvent
* fired and beginning of the render to ensure that vtkHardwareSelector's
* CurrentPass is updated appropriately.
*/
#ifndef vtkPHardwareSelector_h
#define vtkPHardwareSelector_h
#include "vtkOpenGLHardwareSelector.h"
#include "vtkRenderingParallelModule.h" // For export macro
class VTKRENDERINGPARALLEL_EXPORT vtkPHardwareSelector : public vtkOpenGLHardwareSelector
{
public:
static vtkPHardwareSelector* New();
vtkTypeMacro(vtkPHardwareSelector, vtkOpenGLHardwareSelector);
void PrintSelf(ostream& os, vtkIndent indent) override;
//@{
/**
* Set/Get the is the root process. The root processes
* is the only processes which has the composited result and hence the only
* processes that capture buffers and builds selected list ids.
*/
vtkSetMacro(ProcessIsRoot, bool);
vtkGetMacro(ProcessIsRoot, bool);
vtkBooleanMacro(ProcessIsRoot, bool);
//@}
/**
* Overridden to only allow the superclass implementation on the root node. On
* all other processes, the updating the internal state of the
* vtkHardwareSelector as the capturing of buffers progresses is done as a
* slave to the master render.
*/
bool CaptureBuffers() override;
protected:
vtkPHardwareSelector();
~vtkPHardwareSelector() override;
void StartRender();
void EndRender();
bool ProcessIsRoot;
private:
vtkPHardwareSelector(const vtkPHardwareSelector&) = delete;
void operator=(const vtkPHardwareSelector&) = delete;
class vtkObserver;
friend class vtkObserver;
vtkObserver* Observer;
};
#endif
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