core/vil/file_formats/vil_viffheader.cxx

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//:
// \file
#include "vil_viffheader.h"
#include <string.h>


//: Construct an image header
// \param ncols - vil_image::ni()
// \param nrows - vil_image::nj()
// \param storage_type - similar to vil_image::pixel_format()
// \param num_bands - similar to vil_image::n_planes()
vil_viff_xvimage::vil_viff_xvimage(
  unsigned ncols, unsigned nrows,
  vil_viff_data_storage storage_type,
  unsigned num_bands)
{
  const unsigned VIL_VIFF_COMMENT_LENGTH = 512L;

  identifier = (char)XV_FILE_MAGIC_NUM;
  file_type = XV_FILE_TYPE_XVIFF;
  release = XV_IMAGE_REL_NUM;
  version = XV_IMAGE_VER_NUM;
  machine_dep = VFF_DEP_IEEEORDER; /* assume IEEE byte order */
  memset(  reserve, 0, VIFF_HEADERSIZE-21*sizeof(vxl_sint_32)-520*sizeof(char)-4*sizeof(float));
  memset(  trash, 0, 3L);
  memset(  comment, 0, VIL_VIFF_COMMENT_LENGTH);
  strcpy(  comment, "vil_viff image writer output"); // This string needs to be shorter than 511 chars.
  row_size = ncols;
  col_size = nrows;
  subrow_size = 0; /* Don't care, just avoid uninitialised memory. */
  startx = VFF_NOTSUB;
  starty = VFF_NOTSUB;
  pixsizx = 1.0;
  pixsizy = 1.0;
  location_type = VFF_LOC_IMPLICIT;
  location_dim = 0;
  location = NULL;
  num_of_images = 1;
  num_data_bands = num_bands;
  data_storage_type = storage_type;
  data_encode_scheme = VFF_DES_RAW;
  map_scheme = VFF_MS_NONE;
  map_storage_type = VFF_MAPTYP_NONE;
  maps = NULL;
  map_row_size = 0;
  map_col_size = 0;
  map_subrow_size = 0;
  map_enable = VFF_MAP_OPTIONAL;
  maps_per_cycle = 0;      /* Don't care */
  color_space_model = VFF_CM_NONE;
  ispare1 = 0;
  ispare2 = 0;
  fspare1 = 0;
  fspare2 = 0;

  unsigned long image_data_n_bytes;
  switch (storage_type)
  {
    case VFF_TYP_BIT:       image_data_n_bytes = (ncols+7)/8; break;
    case VFF_TYP_2_BYTE:    image_data_n_bytes = ncols*2; break;
    case VFF_TYP_4_BYTE:
    case VFF_TYP_FLOAT:     image_data_n_bytes = ncols*4; break;
    case VFF_TYP_DOUBLE:
    case VFF_TYP_COMPLEX:   image_data_n_bytes = ncols*8; break;
    case VFF_TYP_DCOMPLEX:  image_data_n_bytes = ncols*16; break;
    default:                image_data_n_bytes = ncols*255; break;
  }
  image_data_n_bytes *= nrows*num_data_bands;


  imagedata = 0;
}

vil_viff_xvimage::vil_viff_xvimage()
{
  memset(this,0, sizeof(vil_viff_xvimage));
}