/*******************************************************************************
 * winconsole.cpp
 *
 * This file contains a basic proof-of-concept POV implementation using VFE.
 *
 * Author: Christopher J. Cason
 *
 * ---------------------------------------------------------------------------
 * Persistence of Vision Ray Tracer ('POV-Ray') version 3.7.
 * Copyright 1991-2013 Persistence of Vision Raytracer Pty. Ltd.
 *
 * POV-Ray is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * POV-Ray is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 * ---------------------------------------------------------------------------
 * POV-Ray is based on the popular DKB raytracer version 2.12.
 * DKBTrace was originally written by David K. Buck.
 * DKBTrace Ver 2.0-2.12 were written by David K. Buck & Aaron A. Collins.
 * ---------------------------------------------------------------------------
 * $File: //depot/public/povray/3.x/vfe/win/console/winconsole.cpp $
 * $Revision: #1 $
 * $Change: 6069 $
 * $DateTime: 2013/11/06 11:59:40 $
 * $Author: chrisc $
 *******************************************************************************/

#include "vfe.h"

#ifndef _CONSOLE
#error You must define _CONSOLE in vfe\win\syspovconfig.h prior to building the console version, otherwise you will get link errors.
#endif

using namespace vfe;
using namespace vfePlatform;

namespace pov_frontend
{
	////////////////////////////////
	// Called from the shellout code
	////////////////////////////////
	bool MinimizeShellouts(void) { return false; } // TODO
	bool ShelloutsPermitted(void) { return false; } // TODO
}


static void PrintStatus (vfeSession *session)
{
  string str;
  vfeSession::MessageType type;
  static vfeSession::MessageType lastType = vfeSession::mUnclassified;

  while (session->GetNextCombinedMessage (type, str))
  {
    if (type != vfeSession::mGenericStatus)
    {
      if (lastType == vfeSession::mGenericStatus)
        fprintf (stderr, "\n") ;
      fprintf (stderr, "%s\n", str.c_str());
    }
    else
      fprintf (stderr, "%s\r", str.c_str());
    lastType = type;
  }
}

static void ErrorExit(vfeSession *session)
{
  fprintf (stderr, "%s\n", session->GetErrorString());
  session->Shutdown();
  delete session;
  exit (1);
}

// this is an example of a minimal console version of POV-Ray using the VFE
// (virtual front-end) library. it is NOT INTENDED TO BE A FULLY-FEATURED
// CONSOLE IMPLEMENTATION OF POV-RAY and is not officially supported. see
// the unix version for a example of a more comprehensive console build.
int main (int argc, char **argv)
{
  char              *s;
  vfeWinSession     *session = new vfeWinSession() ;
  vfeStatusFlags    flags;
  vfeRenderOptions  opts;

  fprintf(stderr,
          "This is an example of a minimal console build of POV-Ray under Windows.\n\n"
          "Persistence of Vision Raytracer(tm) " POV_RAY_VERSION COMPILER_VER SSE2_INCLUDED "." PVENGINE_VER ".\n"
		  DISTRIBUTION_MESSAGE_1 "\n"
		  DISTRIBUTION_MESSAGE_2 "\n"
		  DISTRIBUTION_MESSAGE_3 "\n"
		  POV_RAY_COPYRIGHT "\n"
		  DISCLAIMER_MESSAGE_1 "\n"
		  DISCLAIMER_MESSAGE_2 "\n\n");
  
  if (session->Initialize(NULL, NULL) != vfeNoError)
    ErrorExit(session);

  if ((s = getenv ("POVINC")) != NULL)
    opts.AddLibraryPath (s);
  while (*++argv)
    opts.AddCommand (*argv);

  if (session->SetOptions(opts) != vfeNoError)
    ErrorExit(session);
  if (session->StartRender() != vfeNoError)
    ErrorExit(session);

  bool pauseWhenDone = session->GetBoolOption("Pause_When_Done", false);
  while (((flags = session->GetStatus(true, 1000)) & stRenderShutdown) == 0)
    PrintStatus (session) ;
  session->Shutdown() ;
  PrintStatus (session) ;
  delete session;

  if (pauseWhenDone)
  {
    fprintf (stderr, "Press enter to continue ... ");
    fflush(stderr);
    getchar();
  }

  return 0;
}