/*=========================================================================

  Program:   Visualization Toolkit
  Module:    Test_StreamIteration.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.

=========================================================================*/

// Tests that the stream driver can cycle through pieces and render whole
// objects.

#include "vtkActor.h"
#include "vtkCamera.h"
#include "vtkContourFilter.h"
#include "vtkDataSetMapper.h"
#include "vtkPieceCacheFilter.h"
#include "vtkRegressionTestImage.h"
#include "vtkRenderer.h"
#include "vtkRenderWindow.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkSmartPointer.h"
#include "vtkStreamedMandelbrot.h"
#include "vtkIterativeStreamer.h"
#include "vtkStreamingHarness.h"

#include "vtksys/SystemTools.hxx"

//---------------------------------------------------------------------------
int Iteration(int argc, char *argv[])
{
  vtkSmartPointer<vtkRenderer> renderer = vtkSmartPointer<vtkRenderer>::New();
  vtkSmartPointer<vtkRenderWindow> renWin =
    vtkSmartPointer<vtkRenderWindow>::New();
  renWin->AddRenderer(renderer);
  renderer->GetActiveCamera()->SetPosition( 0, 0, 10);
  renderer->GetActiveCamera()->SetFocalPoint(0, 0, 0);
  renderer->GetActiveCamera()->SetViewUp(0, 1, 0);
  renderer->SetBackground(0.0,0.0,0.0);
  renWin->SetSize(300,300);
  vtkSmartPointer<vtkRenderWindowInteractor> iren =
    vtkSmartPointer<vtkRenderWindowInteractor>::New();
  iren->SetRenderWindow(renWin);
  renWin->Render();

  // create a streaming capable source.
  // it provides data and meta data (including world space bounds and
  // possibly scalar ranges) for any requested piece at any requested
  // resolution
  vtkSmartPointer<vtkStreamedMandelbrot> sms =
    vtkSmartPointer<vtkStreamedMandelbrot>::New();
  sms->SetWholeExtent(0,127,0,127,0,127);
  sms->SetOriginCX(-1.75,-1.25,0,0);

  // Set up a sample pipeline containing filters that pass meta info
  // downstream
  vtkSmartPointer<vtkContourFilter> contour =
    vtkSmartPointer<vtkContourFilter>::New();
  contour->SetInputConnection(sms->GetOutputPort());
  contour->SetValue(0,50.0);

  // A cache in the pipeline is essential for decent performance
  vtkSmartPointer<vtkPieceCacheFilter> pcf =
    vtkSmartPointer<vtkPieceCacheFilter>::New();
  pcf->SetInputConnection(contour->GetOutputPort());

  // An access point to inject resolution into the pipeline
  vtkSmartPointer<vtkStreamingHarness> harness=
    vtkSmartPointer<vtkStreamingHarness>::New();
  harness->SetInputConnection(pcf->GetOutputPort());
  harness->SetNumberOfPieces(16);
  harness->SetPiece(0);
  harness->SetResolution(1.0);

  vtkSmartPointer<vtkDataSetMapper> map1 =
    vtkSmartPointer<vtkDataSetMapper>::New();
  map1->SetInputConnection(harness->GetOutputPort());

  vtkSmartPointer<vtkActor> act1 = vtkSmartPointer<vtkActor>::New();
  act1->SetMapper(map1);
  renderer->AddActor(act1);

  vtkSmartPointer<vtkIterativeStreamer> sd =
    vtkSmartPointer<vtkIterativeStreamer>::New();
  sd->SetRenderWindow(renWin);
  sd->SetRenderer(renderer);
  sd->AddHarness(harness);

  //TODO:
  //add a meaningful test of render later/interuptability
  //sd->AssignRenderLaterFunction(foo);

  renWin->Render();

  int retVal = vtkRegressionTestImage( renWin );
  if ( retVal == vtkRegressionTester::DO_INTERACTOR )
    {
    iren->Start();
    }
  return !retVal;
}
