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

  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 "vtkActor.h"
#include "vtkCamera.h"
#include "vtkNew.h"
#include "vtkOpenGLRenderer.h"
#include "vtkPLYReader.h"
#include "vtkPlaneSource.h"
#include "vtkPolyDataMapper.h"
#include "vtkRegressionTestImage.h"
#include "vtkRenderStepsPass.h"
#include "vtkRenderWindow.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkRenderer.h"
#include "vtkSSAOPass.h"
#include "vtkTestUtilities.h"

//------------------------------------------------------------------------------
int TestSSAOPass(int argc, char* argv[])
{
  vtkNew<vtkRenderer> renderer;
  renderer->SetBackground(0.3, 0.4, 0.6);
  vtkNew<vtkRenderWindow> renderWindow;
  renderWindow->SetSize(600, 600);
  renderWindow->AddRenderer(renderer);
  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;

  vtkNew<vtkPolyDataMapper> mapper;
  mapper->SetInputConnection(reader->GetOutputPort());

  vtkNew<vtkActor> actor;
  actor->SetMapper(mapper);
  renderer->AddActor(actor);

  vtkNew<vtkPlaneSource> plane;
  const double* plybounds = mapper->GetBounds();
  plane->SetOrigin(-0.2, plybounds[2], -0.2);
  plane->SetPoint1(-0.2, plybounds[2], 0.2);
  plane->SetPoint2(0.2, plybounds[2], -0.2);

  vtkNew<vtkPolyDataMapper> planeMapper;
  planeMapper->SetInputConnection(plane->GetOutputPort());
  vtkNew<vtkActor> planeActor;
  planeActor->SetMapper(planeMapper);
  renderer->AddActor(planeActor);

  renderWindow->SetMultiSamples(0);

  vtkNew<vtkRenderStepsPass> basicPasses;

  vtkNew<vtkSSAOPass> ssao;
  ssao->SetRadius(0.05);
  ssao->SetKernelSize(128);
  ssao->SetDelegatePass(basicPasses);

  vtkOpenGLRenderer* glrenderer = vtkOpenGLRenderer::SafeDownCast(renderer);
  glrenderer->SetPass(ssao);

  renderer->GetActiveCamera()->SetPosition(-0.2, 0.8, 1);
  renderer->GetActiveCamera()->SetFocalPoint(0, 0, 0);
  renderer->GetActiveCamera()->SetViewUp(0, 1, 0);
  renderer->GetActiveCamera()->OrthogonalizeViewUp();
  renderer->ResetCamera();
  renderer->GetActiveCamera()->Zoom(2.5);
  renderWindow->Render();

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

  return !retVal;
}