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

  Program:   Visualization Toolkit
  Module:    TestBMPReader.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.

=========================================================================*/
// .NAME Test of vtkBMPReader
// .SECTION Description
//

#include "vtkBMPReader.h"
#include "vtkImageData.h"
#include "vtkImageMapToColors.h"
#include "vtkImageViewer.h"
#include "vtkLookupTable.h"
#include "vtkRegressionTestImage.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkRenderer.h"
#include "vtkSmartPointer.h"

int TestBMPReader(int argc, char *argv[])
{

  if ( argc <= 1 )
  {
    cout << "Usage: " << argv[0] << " <bmp file>" << endl;
    return EXIT_FAILURE;
  }

  std::string filename = argv[1];

  vtkSmartPointer<vtkBMPReader> BMPReader =
    vtkSmartPointer<vtkBMPReader>::New();

  // Check the image can be read
  if (!BMPReader->CanReadFile(filename.c_str()))
  {
    cerr << "CanReadFile failed for " << filename.c_str() << "\n";
    return EXIT_FAILURE;
  }

  // Read the input image
  BMPReader->SetFileName(filename.c_str());
  BMPReader->Update();

  // Read and display the image properties
  int depth = BMPReader->GetDepth();
  cout << "depth: " << depth << endl;

  const char* fileExtensions = BMPReader->GetFileExtensions();
  cout << "fileExtensions: " << fileExtensions << endl;

  const char* descriptiveName = BMPReader->GetDescriptiveName();
  cout << "descriptiveName: " << *descriptiveName << endl;

  vtkSmartPointer<vtkLookupTable> lookupTable = BMPReader->GetLookupTable();
  lookupTable->Print(cout);

  const unsigned char* colors = BMPReader->GetColors();
  unsigned char const * first = reinterpret_cast<unsigned char *>(&colors);
  unsigned char const * last = reinterpret_cast<unsigned char *>(&colors + 1);
  cout << "colors: ";
  while( first != last )
    {
    cout << (int)*first << ' ';
    ++first;
    }
  cout << std::endl;

  int allow8BitBMP = 1;
  BMPReader->SetAllow8BitBMP(allow8BitBMP);
  cout << "allow8BitBMP: " << BMPReader->GetAllow8BitBMP() << endl;


  // Visualize
  vtkSmartPointer<vtkImageMapToColors> map =
    vtkSmartPointer<vtkImageMapToColors>::New();
  map->SetInputConnection(BMPReader->GetOutputPort());
  map->SetLookupTable(BMPReader->GetLookupTable());
  map->SetOutputFormatToRGB();

  vtkSmartPointer<vtkImageViewer> imageViewer =
    vtkSmartPointer<vtkImageViewer>::New();
  imageViewer->SetInputConnection(map->GetOutputPort());
  imageViewer->SetColorWindow(256);
  imageViewer->SetColorLevel(127.5);

  vtkNew<vtkRenderWindowInteractor> renderWindowInteractor;
  imageViewer->SetupInteractor(renderWindowInteractor);
  imageViewer->Render();

  vtkRenderWindow* renWin = imageViewer->GetRenderWindow();
  int retVal = vtkRegressionTestImage(renWin);
  if (retVal == vtkRegressionTester::DO_INTERACTOR)
  {
    renderWindowInteractor->Start();
  }

  return !retVal;
}
