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/*=========================================================================
Program: ParaView
Module: vtkNetworkImageSource.cxx
Copyright (c) Kitware, Inc.
All rights reserved.
See Copyright.txt or http://www.paraview.org/HTML/Copyright.html 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 "vtkNetworkImageSource.h"
#include "vtkBMPReader.h"
#include "vtkImageData.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkJPEGReader.h"
#include "vtkMultiProcessController.h"
#include "vtkObjectFactory.h"
#include "vtkPNGReader.h"
#include "vtkPNMReader.h"
#include "vtkProcessModule.h"
#include "vtkPVSession.h"
#include "vtkSmartPointer.h"
#include "vtkStreamingDemandDrivenPipeline.h"
#include "vtkTIFFReader.h"
#include <vtksys/SystemTools.hxx>
vtkStandardNewMacro(vtkNetworkImageSource);
//----------------------------------------------------------------------------
vtkNetworkImageSource::vtkNetworkImageSource()
{
this->SetNumberOfInputPorts(0);
this->Buffer = vtkImageData::New();
this->FileName = 0;
}
//----------------------------------------------------------------------------
vtkNetworkImageSource::~vtkNetworkImageSource()
{
this->SetFileName(0);
this->Buffer->Delete();
this->Buffer = NULL;
}
//----------------------------------------------------------------------------
void vtkNetworkImageSource::UpdateImage()
{
if (this->GetMTime() < this->UpdateImageTime)
{
return;
}
if (this->FileName == NULL || this->FileName[0] == 0)
{
return;
}
vtkPVSession* session = vtkPVSession::SafeDownCast(
vtkProcessModule::GetProcessModule()->GetActiveSession());
if (!session)
{
vtkErrorMacro("Active session must be a vtkPVSession.");
return;
}
vtkPVSession::ServerFlags roles = session->GetProcessRoles();
if ( (roles & vtkPVSession::CLIENT) != 0)
{
// We are expected to read the image on this process.
this->ReadImageFromFile(this->FileName);
vtkMultiProcessController* rs_controller =
session->GetController(vtkPVSession::RENDER_SERVER);
if (rs_controller)
{
rs_controller->Send(this->Buffer, 1, 0x287823);
}
}
else if ( (roles & vtkPVSession::RENDER_SERVER) != 0 ||
(roles & vtkPVSession::RENDER_SERVER_ROOT) != 0)
{
// receive the image from the client.
vtkMultiProcessController* client_controller =
session->GetController(vtkPVSession::CLIENT);
if (client_controller)
{
client_controller->Receive(this->Buffer, 1, 0x287823);
}
}
vtkMultiProcessController* globalController =
vtkMultiProcessController::GetGlobalController();
if (globalController->GetNumberOfProcesses() > 1)
{
globalController->Broadcast(this->Buffer, 0);
}
this->UpdateImageTime.Modified();
}
//----------------------------------------------------------------------------
int vtkNetworkImageSource::ReadImageFromFile(const char* filename)
{
if (!filename || !filename[0])
{
vtkErrorMacro("FileName must be set.");
return 0;
}
vtkSmartPointer<vtkImageReader2> reader;
// determine type of reader to create.
std::string ext =
vtksys::SystemTools::LowerCase(vtksys::SystemTools::GetFilenameLastExtension(filename));
if (ext == ".bmp")
{
reader.TakeReference(vtkBMPReader::New());
}
else if ( ext == ".jpg")
{
reader.TakeReference(vtkJPEGReader::New());
}
else if ( ext == ".png")
{
reader.TakeReference(vtkPNGReader::New());
}
else if (ext == ".ppm")
{
reader.TakeReference(vtkPNMReader::New());
}
else if ( ext == ".tif")
{
reader.TakeReference(vtkTIFFReader::New());
}
else
{
vtkErrorMacro("Unknown texture file extension: " << filename);
return 0;
}
if (!reader->CanReadFile(filename))
{
vtkErrorMacro("Reader cannot read file " << filename);
return 0;
}
reader->SetFileName(filename);
reader->Update();
this->Buffer->ShallowCopy(reader->GetOutput());
return 1;
}
//----------------------------------------------------------------------------
int vtkNetworkImageSource::RequestInformation(
vtkInformation* vtkNotUsed(request),
vtkInformationVector** vtkNotUsed(inputVector),
vtkInformationVector* outputVector)
{
vtkInformation* outInfo = outputVector->GetInformationObject(0);
outInfo->Set(vtkStreamingDemandDrivenPipeline::WHOLE_EXTENT(),
this->Buffer->GetExtent(), 6);
return 1;
}
//----------------------------------------------------------------------------
int vtkNetworkImageSource::RequestData(
vtkInformation *vtkNotUsed(request),
vtkInformationVector** vtkNotUsed(inputVector),
vtkInformationVector* outputVector)
{
// shallow copy internal buffer to output
vtkInformation *outInfo = outputVector->GetInformationObject(0);
vtkImageData *output = vtkImageData::SafeDownCast(
outInfo->Get(vtkDataObject::DATA_OBJECT()));
output->ShallowCopy(this->Buffer);
return 1;
}
//----------------------------------------------------------------------------
void vtkNetworkImageSource::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
}
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