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/*=========================================================================
Program: Visualization Toolkit
Module: vtkPHardwareSelector.cxx
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.
=========================================================================*/
#include "vtkPHardwareSelector.h"
#include "vtkCommand.h"
#include "vtkObjectFactory.h"
#include "vtkRenderWindow.h"
#include "vtkRenderer.h"
class vtkPHardwareSelector::vtkObserver : public vtkCommand
{
public:
static vtkObserver* New() { return new vtkObserver(); }
void Execute(vtkObject*, unsigned long eventId, void*) override
{
if (eventId == vtkCommand::StartEvent)
{
this->Target->StartRender();
}
else if (eventId == vtkCommand::EndEvent)
{
this->Target->EndRender();
}
}
vtkPHardwareSelector* Target;
};
//----------------------------------------------------------------------------
vtkStandardNewMacro(vtkPHardwareSelector);
//----------------------------------------------------------------------------
vtkPHardwareSelector::vtkPHardwareSelector()
{
this->ProcessIsRoot = false;
this->Observer = vtkObserver::New();
this->Observer->Target = this;
}
//----------------------------------------------------------------------------
vtkPHardwareSelector::~vtkPHardwareSelector()
{
this->Observer->Target = nullptr;
this->Observer->Delete();
}
//----------------------------------------------------------------------------
bool vtkPHardwareSelector::CaptureBuffers()
{
if (this->ProcessIsRoot)
{
return this->Superclass::CaptureBuffers();
}
this->InvokeEvent(vtkCommand::StartEvent);
this->BeginSelection();
vtkRenderWindow* rwin = this->Renderer->GetRenderWindow();
rwin->AddObserver(vtkCommand::StartEvent, this->Observer);
rwin->AddObserver(vtkCommand::EndEvent, this->Observer);
for (this->CurrentPass = MIN_KNOWN_PASS; this->CurrentPass < MAX_KNOWN_PASS; this->CurrentPass++)
{
if (this->PassRequired(this->CurrentPass))
{
break;
}
}
if (this->CurrentPass == MAX_KNOWN_PASS)
{
this->EndRender();
}
return false;
}
//----------------------------------------------------------------------------
void vtkPHardwareSelector::StartRender() {}
//----------------------------------------------------------------------------
void vtkPHardwareSelector::EndRender()
{
this->CurrentPass++;
for (; this->CurrentPass < MAX_KNOWN_PASS; this->CurrentPass++)
{
if (this->PassRequired(this->CurrentPass))
{
break;
}
}
if (this->CurrentPass >= MAX_KNOWN_PASS)
{
vtkRenderWindow* rwin = this->Renderer->GetRenderWindow();
rwin->RemoveObserver(this->Observer);
this->EndSelection();
this->InvokeEvent(vtkCommand::EndEvent);
}
}
//----------------------------------------------------------------------------
void vtkPHardwareSelector::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
os << indent << "ProcessIsRoot: " << this->ProcessIsRoot << endl;
}
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