testVideoDevice.cpp

Image display manipulations.

/****************************************************************************
 *
 * This file is part of the ViSP software.
 * Copyright (C) 2005 - 2017 by Inria. All rights reserved.
 *
 * This software is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * ("GPL") version 2 as published by the Free Software Foundation.
 * See the file LICENSE.txt at the root directory of this source
 * distribution for additional information about the GNU GPL.
 *
 * For using ViSP with software that can not be combined with the GNU
 * GPL, please contact Inria about acquiring a ViSP Professional
 * Edition License.
 *
 * See http://visp.inria.fr for more information.
 *
 * This software was developed at:
 * Inria Rennes - Bretagne Atlantique
 * Campus Universitaire de Beaulieu
 * 35042 Rennes Cedex
 * France
 *
 * If you have questions regarding the use of this file, please contact
 * Inria at visp@inria.fr
 *
 * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
 * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 * Description:
 * Test for image display.
 *
 * Authors:
 * Anthony Saunier
 *
 *****************************************************************************/


#include <visp3/core/vpConfig.h>
#include <visp3/core/vpDebug.h>

#include <stdlib.h>
#include <iostream>
#include <string>
#if (defined (VISP_HAVE_GTK) || defined(VISP_HAVE_X11) || defined(VISP_HAVE_GDI) || defined(VISP_HAVE_D3D9) || defined(VISP_HAVE_OPENCV))

#include <visp3/core/vpImage.h>
#include <visp3/io/vpImageIo.h>
#include <visp3/io/vpParseArgv.h>
#include <visp3/core/vpIoTools.h>

#include <visp3/gui/vpDisplayOpenCV.h>
#include <visp3/gui/vpDisplayGTK.h>
#include <visp3/gui/vpDisplayX.h>
#include <visp3/gui/vpDisplayGDI.h>
#include <visp3/gui/vpDisplayD3D.h>

// List of allowed command line options
#define GETOPTARGS  "i:hlt:dc"

typedef enum {
  vpX11,
  vpGTK,
  vpGDI,
  vpD3D,
  vpCV 
} vpDisplayType;

void usage(const char *name, const char *badparam, std::string ipath, vpDisplayType &dtype);
bool getOptions(int argc, const char **argv,
                std::string &ipath, vpDisplayType &dtype, bool &list,
                bool &click_allowed, bool &display );

void usage(const char *name, const char *badparam, std::string ipath, vpDisplayType &dtype)
{
  fprintf(stdout, "\n\
Test video devices or display.\n\
\n\
SYNOPSIS\n\
  %s [-i <input image path>] \n\
     [-t <type of video device>] [-l] [-c] [-d] [-h]\n\
", name);

  std::string display;
  switch(dtype) {
  case vpX11: display = "X11"; break;
  case vpGTK: display = "GTK"; break;
  case vpGDI: display = "GDI"; break;
  case vpD3D: display = "D3D"; break;
  case vpCV: display = "CV"; break;
  }

  fprintf(stdout, "\n\
OPTIONS:                                               Default\n\
  -i <input image path>                                %s\n\
     Set image input path.\n\
     From this path read \"ViSP-images/Klimt/Klimt.pgm\"\n\
     and \"ViSP-images/Klimt/Klimt.ppm\" images.\n\
     Setting the VISP_INPUT_IMAGE_PATH environment\n\
     variable produces the same behaviour than using\n\
     this option.\n\
\n\
  -t <type of video device>                            \"%s\"\n\
     String specifying the video device to use.\n\
     Possible values:\n\
       \"X11\": only on UNIX platforms,\n\
       \"GTK\": on all plaforms,\n\
       \"GDI\": only on Windows platform (Graphics Device Interface),\n\
       \"D3D\": only on Windows platform (Direct3D).\n\
       \"CV\" : (OpenCV).\n\
\n\
  -c\n\
     Disable the mouse click. Useful to automaze the \n\
     execution of this program without humain intervention.\n\
\n\
  -d \n\
     Turn off the display.\n\
\n\
  -l\n\
     Print the list of video-devices available and exit.\n\
\n\
  -h\n\
     Print the help.\n\n",
      ipath.c_str(), display.c_str());

  if (badparam)
    fprintf(stdout, "\nERROR: Bad parameter [%s]\n", badparam);
}

bool getOptions(int argc, const char **argv,
                std::string &ipath, vpDisplayType &dtype, bool &list,
                bool &click_allowed, bool &display )
{
  const char *optarg_;
  int   c;
  std::string sDisplayType;
  while ((c = vpParseArgv::parse(argc, argv, GETOPTARGS, &optarg_)) > 1) {

    switch (c) {
    case 'i': ipath = optarg_; break;
    case 'l': list = true; break;
    case 't': sDisplayType = optarg_;
      // Parse the display type option
      if (sDisplayType.compare("X11") == 0) {
        dtype = vpX11;
      }
      else if (sDisplayType.compare("GTK") == 0) {
        dtype = vpGTK;
      }
      else if (sDisplayType.compare("GDI") == 0) {
        dtype = vpGDI;
      }
      else if (sDisplayType.compare("D3D") == 0) {
        dtype = vpD3D;
      }
      else if (sDisplayType.compare("CV") == 0) {
        dtype = vpCV;
      }

      break;
    case 'h': usage(argv[0], NULL, ipath,dtype); return false; break;
    case 'c': click_allowed = false; break;
    case 'd': display = false; break;

    default:
      usage(argv[0], optarg_, ipath,dtype); return false; break;
    }
  }


  if ((c == 1) || (c == -1)) {
    // standalone param or error
    usage(argv[0], NULL, ipath, dtype);
    std::cerr << "ERROR: " << std::endl;
    std::cerr << "  Bad argument " << optarg_ << std::endl << std::endl;
    return false;
  }

  return true;
}

int
main(int argc, const char ** argv)
{
  try{
    std::string env_ipath;
    std::string opt_ipath;
    bool opt_list = false; // To print the list of video devices
    vpDisplayType opt_dtype; // Type of display to use
    std::string ipath;
    std::string filename;
    bool opt_click_allowed = true;
    bool opt_display = true;

    // Default display is one available
#if defined VISP_HAVE_GTK
    opt_dtype = vpGTK;
#elif defined VISP_HAVE_X11
    opt_dtype = vpX11;
#elif defined VISP_HAVE_GDI
    opt_dtype = vpGDI;
#elif defined VISP_HAVE_D3D9
    opt_dtype = vpD3D;
#elif defined VISP_HAVE_OPENCV
    opt_dtype = vpCV;  
#endif

    // Get the visp-images-data package path or VISP_INPUT_IMAGE_PATH environment variable value
    env_ipath = vpIoTools::getViSPImagesDataPath();

    // Set the default input path
    if (! env_ipath.empty())
      ipath = env_ipath;

    // Read the command line options
    if (getOptions(argc, argv, opt_ipath, opt_dtype, opt_list,
                   opt_click_allowed, opt_display) == false) {
      exit (-1);
    }

    // Print the list of video-devices available
    if (opt_list) {
      unsigned nbDevices = 0;
      std::cout << "List of video-devices available: \n";
#if defined VISP_HAVE_GTK
      std::cout << "  GTK (use \"-t GTK\" option to use it)\n";
      nbDevices ++;
#endif
#if defined VISP_HAVE_X11
      std::cout << "  X11 (use \"-t X11\" option to use it)\n";
      nbDevices ++;
#endif
#if defined VISP_HAVE_GDI
      std::cout << "  GDI (use \"-t GDI\" option to use it)\n";
      nbDevices ++;
#endif
#if defined VISP_HAVE_D3D9
      std::cout << "  D3D (use \"-t D3D\" option to use it)\n";
      nbDevices ++;
#endif
#if defined VISP_HAVE_OPENCV
      std::cout << "  CV (use \"-t CV\" option to use it)\n";
      nbDevices ++;
#endif   
      if (!nbDevices) {
        std::cout << "  No display is available\n";
      }
      return (0);
    }

    // Get the option values
    if (!opt_ipath.empty())
      ipath = opt_ipath;

    // Compare ipath and env_ipath. If they differ, we take into account
    // the input path comming from the command line option
    if (!opt_ipath.empty() && !env_ipath.empty()) {
      if (ipath != env_ipath) {
        std::cout << std::endl
                  << "WARNING: " << std::endl;
        std::cout << "  Since -i <visp image path=" << ipath << "> "
                  << "  is different from VISP_IMAGE_PATH=" << env_ipath << std::endl
                  << "  we skip the environment variable." << std::endl;
      }
    }

    // Test if an input path is set
    if (opt_ipath.empty() && env_ipath.empty()){
      usage(argv[0], NULL, ipath, opt_dtype);
      std::cerr << std::endl
                << "ERROR:" << std::endl;
      std::cerr << "  Use -i <visp image path> option or set VISP_INPUT_IMAGE_PATH "
                << std::endl
                << "  environment variable to specify the location of the " << std::endl
                << "  image path where test images are located." << std::endl << std::endl;
      exit(-1);
    }

    // Create a grey level image
    vpImage<unsigned char> I ;
    // Create a color image
    vpImage<vpRGBa> Irgba ;

    // Load a grey image from the disk
    filename = vpIoTools::createFilePath(ipath, "ViSP-images/Klimt/Klimt.pgm");
    vpCTRACE << "Load " <<  filename << std::endl;
    vpImageIo::read(I, filename) ;

    // Load a color image from the disk
    filename = vpIoTools::createFilePath(ipath, "ViSP-images/Klimt/Klimt.ppm");
    vpCTRACE << "Load " <<  filename << std::endl;
    vpImageIo::read(Irgba, filename) ;


    // Create a display for the image
    vpDisplay *display = NULL;

    switch(opt_dtype) {
    case vpX11:
      std::cout << "Requested X11 display functionnalities..." << std::endl;
#if defined VISP_HAVE_X11
      display = new vpDisplayX;
#else
      std::cout << "  Sorry, X11 video device is not available.\n";
      std::cout << "Use \"" << argv[0]
                << " -l\" to print the list of available devices.\n";
      return 0;
#endif
      break;
    case vpGTK:
      std::cout << "Requested GTK display functionnalities..." << std::endl;
#if defined VISP_HAVE_GTK
      display = new vpDisplayGTK;
#else
      std::cout << "  Sorry, GTK video device is not available.\n";
      std::cout << "Use \"" << argv[0]
                << " -l\" to print the list of available devices.\n";
      return 0;
#endif
      break;
    case vpGDI:
      std::cout << "Requested GDI display functionnalities..." << std::endl;
#if defined VISP_HAVE_GDI
      display = new vpDisplayGDI;
#else
      std::cout << "  Sorry, GDI video device is not available.\n";
      std::cout << "Use \"" << argv[0]
                << " -l\" to print the list of available devices.\n";
      return 0;
#endif
      break;
    case vpD3D:
      std::cout << "Requested D3D display functionnalities..." << std::endl;
#if defined VISP_HAVE_D3D9
      display = new vpDisplayD3D;
#else
      std::cout << "  Sorry, D3D video device is not available.\n";
      std::cout << "Use \"" << argv[0]
                << " -l\" to print the list of available devices.\n";
      return 0;
#endif
      break;
    case vpCV:
      std::cout << "Requested OpenCV display functionnalities..." << std::endl;
#if defined(VISP_HAVE_OPENCV)
      display = new vpDisplayOpenCV;
#else
      std::cout << "  Sorry, OpenCV video device is not available.\n";
      std::cout << "Use \"" << argv[0]
                << " -l\" to print the list of available devices.\n";
      return 0;
#endif
      break;
    }
    if (opt_display){

      // We open a window using either X11 or GTK or GDI or D3D.
      // Its size is automatically defined by the image (I) size
      display->init(I, 100, 100,"Display...") ;

      // Display the image
      // The image class has a member that specify a pointer toward
      // the display that has been initialized in the display declaration
      // therefore is is no longuer necessary to make a reference to the
      // display variable.
      vpDisplay::display(I) ;
      //Flush the display
      vpDisplay::flush(I) ;
      std::cout << "A click to continue...\n";
      if ( opt_click_allowed )
        vpDisplay::getClick(I) ;

      display->close(I);

      // We open a window using either X11 or GTK or GDI or D3D
      // but using anothe function who doesn't take title.
      // Its size is automatically defined by the image (I) size

      display->init(I, 100, 100);

      // Display the image
      // The image class has a member that specify a pointer toward
      // the display that has been initialized in the display declaration
      // therefore is is no longuer necessary to make a reference to the
      // display variable.
      vpDisplay::display(I) ;
      //Flush the display
      vpDisplay::flush(I) ;
        std::cout << "A click to continue...\n";
      if ( opt_click_allowed )
        vpDisplay::getClick(I) ;

      display->close(I);

      // We open a window using either X11 or GTK or GDI or D3D.
      // Its size is automatically defined by the image (I) size

      display->init(Irgba, 100, 100,"Color display...");

      // Display the image
      // The image class has a member that specify a pointer toward
      // the display that has been initialized in the display declaration
      // therefore is is no longuer necessary to make a reference to the
      // display variable.
      vpDisplay::display(Irgba) ;
      //Flush the display
      vpDisplay::flush(Irgba) ;

      std::cout << "A click to continue...\n";
      if ( opt_click_allowed )
        vpDisplay::getClick(Irgba) ;

      display->close(Irgba);

      // We open a window using either X11 or GTK or GDI or D3D
      // but using anothe function who doesn't take title.
      // Its size is automatically defined by the image (I) size

      display->init(Irgba, 100, 100);

      // Display the image
      // The image class has a member that specify a pointer toward
      // the display that has been initialized in the display declaration
      // therefore is is no longuer necessary to make a reference to the
      // display variable.
      vpDisplay::display(Irgba) ;
      //Flush the display
      vpDisplay::flush(Irgba) ;

      std::cout << "A click to exit...\n";
      if ( opt_click_allowed )
        vpDisplay::getClick(Irgba) ;
    }
    delete display;
  }
  catch(...) {
    vpERROR_TRACE("Error while displaying the image") ;
    exit(-1);
  }
}

#else
int
main()
{
  vpERROR_TRACE("You do not have display functionalities...");
}

#endif