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

  Program:   Visualization Toolkit

  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 "vtkCamera.h"
#include "vtkRenderer.h"
#include "vtkOpenGLRenderWindow.h"
#include "vtkActor.h"
#include "vtkCellArray.h"
#include "vtkPointData.h"
#include "vtkPolyDataMapper.h"
#include "vtkPLYReader.h"
#include "vtkNew.h"
#include "vtkProperty.h"

#include "vtkRegressionTestImage.h"
#include "vtkTestUtilities.h"

#include "vtkRenderWindowInteractor.h"

//----------------------------------------------------------------------------
int TestSetZBuffer(int argc, char *argv[])
{
  vtkNew<vtkActor> actor;
  vtkNew<vtkRenderer> renderer;
  vtkNew<vtkPolyDataMapper> mapper;
  renderer->SetBackground(0.0, 0.0, 0.0);
  vtkNew<vtkRenderWindow> renderWindow;
  renderWindow->SetSize(300, 300);
  renderWindow->AddRenderer(renderer);
  renderer->AddActor(actor);
  vtkNew<vtkRenderWindowInteractor>  iren;
  iren->SetRenderWindow(renderWindow);

  const char* fileName =
    vtkTestUtilities::ExpandDataFileName(argc, argv, "Data/dragon.ply");
  vtkNew<vtkPLYReader> reader;
  reader->SetFileName(fileName);
  reader->Update();

  delete [] fileName;

  mapper->SetInputConnection(reader->GetOutputPort());
  actor->SetMapper(mapper);
  actor->GetProperty()->SetAmbientColor(0.2, 0.2, 1.0);
  actor->GetProperty()->SetDiffuseColor(1.0, 0.65, 0.7);
  actor->GetProperty()->SetSpecularColor(1.0, 1.0, 1.0);
  actor->GetProperty()->SetSpecular(0.5);
  actor->GetProperty()->SetDiffuse(0.7);
  actor->GetProperty()->SetAmbient(0.5);
  actor->GetProperty()->SetSpecularPower(20.0);
  actor->GetProperty()->SetOpacity(1.0);
  renderWindow->SetMultiSamples(0);

  renderer->GetActiveCamera()->SetPosition(0,0,1);
  renderer->GetActiveCamera()->SetFocalPoint(0,0,0);
  renderer->GetActiveCamera()->SetViewUp(0,1,0);
  renderer->ResetCamera();
  renderWindow->Render();
  renderWindow->Render();

  std::vector<float> depth;
  depth.reserve(90000);
  for (int i = 0; i < 300; i++)
  {
    for (int j = 0; j < 300; j++)
    {
      depth.push_back((j > 149 ? 0.0 : 1.0));
    }
  }

  renderer->SetPreserveDepthBuffer(1);
  for (int i = 0; i < 4; i++)
  {
    renderWindow->SetZbufferData(0,0,299,299,&(depth[0]));
    renderWindow->Render();
  }
  renderer->SetPreserveColorBuffer(1);

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

  return !retVal;
}
