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 /*@@
   @file      Write2D.c
   @date      
   @author    Gabrielle Allen
   @desc 
   
   @enddesc 
   @version $Header$
 @@*/

#include "cctk.h"

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif

#include "cctk_Parameters.h"
#include "CactusBase/IOUtil/src/ioutil_AdvertisedFiles.h"
#include "IOJpeg.h"

static char *rcsid = "$Header$";

CCTK_FILEVERSION(CactusIO_IOJpeg_Write2D_c)

/* The dimension of the Jpeg hyperslabs */
#define JPEG_SLABDIM 2

/********************************************************************
 *********************     Local Data Types   ***********************
 ********************************************************************/

/********************************************************************
 ********************* Local Routine Prototypes *********************
 ********************************************************************/

/********************************************************************
 ********************* Other Routine Prototypes *********************
 ********************************************************************/

/********************************************************************
 *********************     Local Data   *****************************
 ********************************************************************/

#ifdef _WIN32
#define FILEOPENSTRING "wb"
#else
#define FILEOPENSTRING "w"
#endif

/********************************************************************
 *********************     External Routines   **********************
 ********************************************************************/


 /*@@
   @routine    IOJpeg_Write2D
   @date       
   @author     Gabrielle Allen
   @desc 
   
   @enddesc 
   @calls     
   @calledby   
   @history 
 
   @endhistory 

@@*/
int IOJpeg_Write2D (cGH *GH, int vindex, const char *alias)
{
  DECLARE_CCTK_PARAMETERS
  int timelevel;
  IOJpegGH *ssGH; 
  IOJpegGeo_t *geo;
  FILE *file;                    /* output file descriptor */
  int si,max_slabs;
  char *filename;
  char *fullname;
  char slice[20];
  ioAdvertisedFileDesc advertised_file; 
  int myproc;
  int retval;


  /* the return code for success */
  retval = 0;

  /* get the processor ID */
  myproc = CCTK_MyProc (0);

  /* get the variable's full name and the current timelevel */
  fullname = CCTK_FullName (vindex);
  timelevel = CCTK_NumTimeLevelsFromVarI (vindex) - 1;
  if (timelevel > 0)
  {
    timelevel--;
  }

  /* Get the handle for Jpeg's IO extensions */
  ssGH = (IOJpegGH *) GH->extensions[CCTK_GHExtensionHandle ("IOJpeg")];

  /* Get this variable's slab geometry for 2D slabs */
  geo  = &ssGH->out_geo[vindex][JPEG_SLABDIM];

  /* Maximal number of 2D slabs in given volume (dimension vdim) */
  max_slabs = (geo->vdim * (geo->vdim - 1)) / 2;
  if (max_slabs <= 0)
  {
    CCTK_VWarn (1, __LINE__, __FILE__, CCTK_THORNSTRING,
                "No 2D jpeg output available for variable '%s' alias '%s' "
                "(dim %d)", fullname, alias, geo->vdim);
    free (fullname);
    return (-1);
  }

  if (! CCTK_Equals (verbose, "no"))
  {
    CCTK_VInfo (CCTK_THORNSTRING, "IOJpeg 2D-output of variable '%s' "
                "alias '%s'", fullname, alias);
  }

  /* allocate memory for building the filename */
  filename = (char *) malloc (strlen (ssGH->outdir2D) + strlen (alias) + 50);

  /* Loop over all possible hyperslabs */
  for (si = 0; si < max_slabs; si++)
  {

    /* Get the next set of slab directions */
    if (IOJpeg_SetDirection (geo, si) < 0)
    {
      CCTK_VWarn (1, __LINE__, __FILE__, CCTK_THORNSTRING,
                  "Cannot set direction for slab (#%d) in given volume (%d).",
                  si, geo->vdim);
      continue;
    }

    /* set the slice string */
    sprintf (slice, "%d_%d", si, geo->vdim);

    /* processor 0 opens the output file */
    if (myproc == 0)
    {
      /* get the output filename
         skip pathname if output goes into current directory */
      if (CCTK_Equals (mode, "remove"))
      {
        if (strcmp (ssGH->outdir2D, "."))
        {
          sprintf (filename, "%s/%s_%s.jpeg", ssGH->outdir2D, alias, slice);
        }
        else
        {
          sprintf (filename, "%s_%s.jpeg", alias, slice);
        }
      }
      else
      {
        if (strcmp (ssGH->outdir2D, "."))
        {
          sprintf (filename, "%s/%s_%s.%d.jpeg", ssGH->outdir2D, alias, slice,
                   GH->cctk_iteration);
        }
        else
        {
          sprintf (filename, "%s_%s.%d.jpeg", alias, slice, GH->cctk_iteration);
        }
      }

      file = fopen (filename, FILEOPENSTRING);
      if (! file)
      {
        CCTK_VWarn (1, __LINE__, __FILE__, CCTK_THORNSTRING,
                    "Cannot open 2D jpeg output file '%s'", filename);
      }
    }
    else
    {
      file = NULL;
    }

    /* now output the actual data */
    if (IOJpeg_DumpVar (GH, vindex, timelevel, geo, file) < 0)
    {
      CCTK_VWarn (1, __LINE__, __FILE__, CCTK_THORNSTRING,
                  "IOJpeg_DumpVar failed for variable '%s'", fullname);
      retval--;
    }

    /* close the output file and advertise it */
    if (file)
    {
      /* Close the file */
      fclose (file);

      /* advertise the file for downloading */
      if (CCTK_Equals (mode, "remove") && ! ssGH->advertised[si][vindex])
      {
        /* Set flag for remembering if file has been advertised */
        ssGH->advertised[si][vindex] = 1;

        advertised_file.slice       = slice;
        advertised_file.thorn       = CCTK_THORNSTRING;
        advertised_file.varname     = fullname;
        advertised_file.description = "Jpegs of slices";
        advertised_file.mimetype    = "image/jpeg";
      
        IOUtil_AdvertiseFile (GH, filename, &advertised_file);
      }
    }

  } /* end of loop over all 2D hyperslabs */

  /* free allocated resources */
  free (filename); 
  free (fullname);

  return (retval);
}