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

  Program:   Visualization Toolkit
  Module:    TestGPURayCastFourComponentsMinIP.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.

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

// This test volume renders the vase dataset with 4 dependent components the
// minimum intensity projection method.

#include "vtkGPUVolumeRayCastMapper.h"
#include "vtkTestUtilities.h"
#include "vtkXMLImageDataReader.h"
#include "vtkImageShiftScale.h"
#include "vtkColorTransferFunction.h"
#include "vtkPiecewiseFunction.h"
#include "vtkTransform.h"
#include "vtkRenderer.h"
#include "vtkRenderWindow.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkVolumeProperty.h"
#include "vtkCamera.h"
#include "vtkRegressionTestImage.h"

int TestGPURayCastFourComponentsMinIP(int argc,
                                      char *argv[])
{
  cout << "CTEST_FULL_OUTPUT (Avoid ctest truncation of output)" << endl;
  char *cfname=
    vtkTestUtilities::ExpandDataFileName(argc, argv, "Data/vase_4comp.vti");

  vtkXMLImageDataReader *reader=vtkXMLImageDataReader::New();
  reader->SetFileName(cfname);
  delete [] cfname;

  vtkImageShiftScale *shiftScale=vtkImageShiftScale::New();
  shiftScale->SetShift(-255);
  shiftScale->SetScale(-1);
  shiftScale->SetInputConnection(reader->GetOutputPort());


  vtkRenderer *ren1=vtkRenderer::New();
  vtkRenderWindow *renWin=vtkRenderWindow::New();
  renWin->AddRenderer(ren1);
  renWin->SetSize(301,300);
  vtkRenderWindowInteractor *iren=vtkRenderWindowInteractor::New();
  iren->SetRenderWindow(renWin);

  renWin->Render();

  vtkGPUVolumeRayCastMapper *volumeMapper;
  vtkVolumeProperty *volumeProperty;
  vtkVolume *volume;

  volumeMapper=vtkGPUVolumeRayCastMapper::New();
  volumeMapper->SetBlendModeToMinimumIntensity();
  volumeMapper->SetInputConnection(
    shiftScale->GetOutputPort());

  volumeProperty=vtkVolumeProperty::New();
  volumeProperty->IndependentComponentsOff();

  vtkPiecewiseFunction *f = vtkPiecewiseFunction::New();
  f->AddPoint(0,1.0);
  f->AddPoint(255,0.0);
  volumeProperty->SetScalarOpacity(f);
  f->Delete();

  volume=vtkVolume::New();
  volume->SetMapper(volumeMapper);
  volume->SetProperty(volumeProperty);
  ren1->AddViewProp(volume);

  int valid=volumeMapper->IsRenderSupported(renWin,volumeProperty);

  int retVal;
  if(valid)
    {
    iren->Initialize();
    ren1->SetBackground(0.1,0.4,0.2);
    ren1->ResetCamera();
    renWin->Render();

    retVal = vtkTesting::Test(argc, argv, renWin, 75);
    if (retVal == vtkRegressionTester::DO_INTERACTOR)
      {
      iren->Start();
      }
    }
  else
    {
    retVal=vtkTesting::PASSED;
    cout << "Required extensions not supported." << endl;
    }

  iren->Delete();
  renWin->Delete();
  ren1->Delete();
  volumeMapper->Delete();
  volumeProperty->Delete();
  volume->Delete();

  reader->Delete();
  shiftScale->Delete();

  if ((retVal == vtkTesting::PASSED) || (retVal == vtkTesting::DO_INTERACTOR))
    {
    return 0;
    }
  else
    {
    return 1;
    }
}
