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gimp/plug-ins/file-fits/fits.c

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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
* FITS file plugin
* reading and writing code Copyright (C) 1997 Peter Kirchgessner
* e-mail: peter@kirchgessner.net, WWW: http://www.kirchgessner.net
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
*/
/* Event history:
* V 1.00, PK, 05-May-97: Creation
* V 1.01, PK, 19-May-97: Problem with compilation on Irix fixed
* V 1.02, PK, 08-Jun-97: Bug with saving gray images fixed
* V 1.03, PK, 05-Oct-97: Parse rc-file
* V 1.04, PK, 12-Oct-97: No progress bars for non-interactive mode
* V 1.05, nn, 20-Dec-97: Initialize image_ID in run()
* V 1.06, PK, 21-Nov-99: Internationalization
* Fix bug with gimp_export_image()
* (moved it from load to save)
* V 1.07, PK, 16-Aug-06: Fix problems with internationalization
* (writing 255,0 instead of 255.0)
* Fix problem with not filling up properly last record
*/
#include "config.h"
#include <string.h>
#include <errno.h>
#include <glib/gstdio.h>
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include <fitsio.h>
#include "libgimp/stdplugins-intl.h"
#define LOAD_PROC "file-fits-load"
#define EXPORT_PROC "file-fits-export"
#define PLUG_IN_BINARY "file-fits"
#define PLUG_IN_ROLE "gimp-file-fits"
typedef struct _Fits Fits;
typedef struct _FitsClass FitsClass;
struct _Fits
{
GimpPlugIn parent_instance;
};
struct _FitsClass
{
GimpPlugInClass parent_class;
};
#define FITS_TYPE (fits_get_type ())
#define FITS(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), FITS_TYPE, Fits))
GType fits_get_type (void) G_GNUC_CONST;
typedef struct
{
gint naxis;
glong naxisn[3];
gint bitpix;
gint bpp;
gint datatype;
} FitsHduData;
static GList * fits_query_procedures (GimpPlugIn *plug_in);
static GimpProcedure * fits_create_procedure (GimpPlugIn *plug_in,
const gchar *name);
static GimpValueArray * fits_load (GimpProcedure *procedure,
GimpRunMode run_mode,
GFile *file,
GimpMetadata *metadata,
GimpMetadataLoadFlags *flags,
GimpProcedureConfig *config,
gpointer run_data);
static GimpValueArray * fits_export (GimpProcedure *procedure,
GimpRunMode run_mode,
GimpImage *image,
GFile *file,
GimpMetadata *metadata,
GimpProcedureConfig *config,
gpointer run_data);
static GimpImage * load_image (GFile *file,
GObject *config,
GimpRunMode run_mode,
GError **error);
static gint export_image (GFile *file,
GimpImage *image,
GimpDrawable *drawable,
GError **error);
static gint export_fits (GFile *file,
GimpImage *image,
GimpDrawable *drawable);
static GimpImage * create_new_image (GFile *file,
guint pagenum,
guint width,
guint height,
GimpImageBaseType itype,
GimpImageType dtype,
GimpPrecision iprecision,
GimpLayer **layer,
GeglBuffer **buffer);
static gboolean load_dialog (GimpProcedure *procedure,
GObject *config);
static void show_fits_errors (gint status);
G_DEFINE_TYPE (Fits, fits, GIMP_TYPE_PLUG_IN)
GIMP_MAIN (FITS_TYPE)
DEFINE_STD_SET_I18N
static void
fits_class_init (FitsClass *klass)
{
GimpPlugInClass *plug_in_class = GIMP_PLUG_IN_CLASS (klass);
plug_in_class->query_procedures = fits_query_procedures;
plug_in_class->create_procedure = fits_create_procedure;
plug_in_class->set_i18n = STD_SET_I18N;
}
static void
fits_init (Fits *fits)
{
}
static GList *
fits_query_procedures (GimpPlugIn *plug_in)
{
GList *list = NULL;
list = g_list_append (list, g_strdup (LOAD_PROC));
list = g_list_append (list, g_strdup (EXPORT_PROC));
return list;
}
static GimpProcedure *
fits_create_procedure (GimpPlugIn *plug_in,
const gchar *name)
{
GimpProcedure *procedure = NULL;
if (! strcmp (name, LOAD_PROC))
{
procedure = gimp_load_procedure_new (plug_in, name,
GIMP_PDB_PROC_TYPE_PLUGIN,
fits_load, NULL, NULL);
gimp_procedure_set_menu_label (procedure,
_("Flexible Image Transport System"));
gimp_procedure_set_documentation (procedure,
_("Load file of the FITS file format"),
_("Load file of the FITS file format "
"(Flexible Image Transport System)"),
name);
gimp_procedure_set_attribution (procedure,
"Peter Kirchgessner",
"Peter Kirchgessner (peter@kirchgessner.net), "
"Alex Sa.",
"1997 - 2023");
gimp_file_procedure_set_mime_types (GIMP_FILE_PROCEDURE (procedure),
"image/x-fits");
gimp_file_procedure_set_extensions (GIMP_FILE_PROCEDURE (procedure),
"fit,fits");
gimp_file_procedure_set_magics (GIMP_FILE_PROCEDURE (procedure),
"0,string,SIMPLE");
gimp_procedure_add_choice_aux_argument (procedure, "replace",
_("Re_placement for undefined pixels"),
_("Replacement for undefined pixels"),
gimp_choice_new_with_values ("black", 0, _("Black"), NULL,
"white", 255, _("White"), NULL,
NULL),
"black",
G_PARAM_READWRITE);
gimp_procedure_add_choice_aux_argument (procedure, "use-data-min-max",
_("Pi_xel value scaling"),
_("Whether to use DATAMIN/DATAMAX-scaling if possible"),
gimp_choice_new_with_values ("automatic", 0, _("Automatic"), NULL,
"data-min-max", 1, _("By DATAMIN/DATAMAX"), NULL,
NULL),
"automatic",
G_PARAM_READWRITE);
}
else if (! strcmp (name, EXPORT_PROC))
{
procedure = gimp_export_procedure_new (plug_in, name,
GIMP_PDB_PROC_TYPE_PLUGIN,
FALSE, fits_export, NULL, NULL);
gimp_procedure_set_image_types (procedure, "RGB, GRAY, INDEXED");
gimp_procedure_set_menu_label (procedure,
_("Flexible Image Transport System"));
gimp_procedure_set_documentation (procedure,
_("Export file in the FITS file format"),
_("FITS exporting handles all image "
"types except those with alpha channels."),
name);
gimp_procedure_set_attribution (procedure,
"Peter Kirchgessner",
"Peter Kirchgessner (peter@kirchgessner.net), "
"Alex Sa.",
"1997 - 2023");
gimp_file_procedure_set_mime_types (GIMP_FILE_PROCEDURE (procedure),
"image/x-fits");
gimp_file_procedure_set_extensions (GIMP_FILE_PROCEDURE (procedure),
"fit,fits");
}
return procedure;
}
static GimpValueArray *
fits_load (GimpProcedure *procedure,
GimpRunMode run_mode,
GFile *file,
GimpMetadata *metadata,
GimpMetadataLoadFlags *flags,
GimpProcedureConfig *config,
gpointer run_data)
{
GimpValueArray *return_vals;
GimpImage *image;
GError *error = NULL;
gegl_init (NULL, NULL);
if (run_mode == GIMP_RUN_INTERACTIVE)
{
if (! load_dialog (procedure, G_OBJECT (config)))
return gimp_procedure_new_return_values (procedure,
GIMP_PDB_CANCEL,
NULL);
}
image = load_image (file, G_OBJECT (config), run_mode, &error);
if (! image)
return gimp_procedure_new_return_values (procedure,
GIMP_PDB_EXECUTION_ERROR,
error);
return_vals = gimp_procedure_new_return_values (procedure,
GIMP_PDB_SUCCESS,
NULL);
GIMP_VALUES_SET_IMAGE (return_vals, 1, image);
return return_vals;
}
static GimpValueArray *
fits_export (GimpProcedure *procedure,
GimpRunMode run_mode,
GimpImage *image,
GFile *file,
GimpMetadata *metadata,
GimpProcedureConfig *config,
gpointer run_data)
{
GimpImage *duplicate_image;
GimpItem **flipped_drawables;
GimpPDBStatusType status = GIMP_PDB_SUCCESS;
GimpExportReturn export = GIMP_EXPORT_IGNORE;
GList *drawables;
gint n_drawables;
GError *error = NULL;
gegl_init (NULL, NULL);
if (run_mode == GIMP_RUN_INTERACTIVE)
gimp_ui_init (PLUG_IN_BINARY);
export = gimp_export_image (&image,
GIMP_EXPORT_CAN_HANDLE_RGB |
GIMP_EXPORT_CAN_HANDLE_GRAY |
GIMP_EXPORT_CAN_HANDLE_INDEXED);
drawables = gimp_image_list_layers (image);
n_drawables = g_list_length (drawables);
/* Flip image vertical since FITS writes from bottom to top */
duplicate_image = gimp_image_duplicate (image);
gimp_image_flip (duplicate_image, GIMP_ORIENTATION_VERTICAL);
flipped_drawables =
gimp_image_get_selected_drawables (duplicate_image, &n_drawables);
if (! export_image (file, image, GIMP_DRAWABLE (flipped_drawables[0]),
&error))
status = GIMP_PDB_EXECUTION_ERROR;
gimp_image_delete (duplicate_image);
g_free (flipped_drawables);
if (export == GIMP_EXPORT_EXPORT)
gimp_image_delete (image);
g_list_free (drawables);
return gimp_procedure_new_return_values (procedure, status, error);
}
static GimpImage *
load_image (GFile *file,
GObject *config,
GimpRunMode run_mode,
GError **error)
{
GimpImage *image = NULL;
GimpLayer *layer;
GeglBuffer *buffer;
FILE *fp;
fitsfile *ifp;
FitsHduData hdu;
gint n_pics;
gint count = 1;
gint width;
gint height;
gint row_length;
int status = 0;
glong fpixel[3] = {1, 1, 1};
GimpImageBaseType itype = GIMP_GRAY;
GimpImageType dtype = GIMP_GRAYA_IMAGE;
GimpPrecision iprecision = GIMP_PRECISION_U16_NON_LINEAR;
const Babl *type = NULL;
const Babl *format = NULL;
gdouble *pixels;
gdouble datamin = 1.0E30f;
gdouble datamax = -1.0E30f;
gint channels = 1;
gint replace;
gdouble replace_val = 0;
gboolean use_datamin;
replace = gimp_procedure_config_get_choice_id (GIMP_PROCEDURE_CONFIG (config),
"replace");
use_datamin = gimp_procedure_config_get_choice_id (GIMP_PROCEDURE_CONFIG (config),
"use-data-min-max");
fp = g_fopen (g_file_peek_path (file), "rb");
if (! fp)
{
g_set_error (error, G_FILE_ERROR, g_file_error_from_errno (errno),
_("Could not open '%s' for reading: %s"),
gimp_file_get_utf8_name (file), g_strerror (errno));
return NULL;
}
fclose (fp);
if (fits_open_diskfile (&ifp, g_file_peek_path (file), READONLY, &status))
show_fits_errors (status);
if (! ifp)
{
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
"%s", _("Error during opening of FITS file"));
return NULL;
}
/* Get first item */
fits_get_num_hdus (ifp, &n_pics, &status);
if (status)
show_fits_errors (status);
if (n_pics <= 0)
{
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
"%s", _("FITS file keeps no displayable images"));
fits_close_file (ifp, &status);
return NULL;
}
while (count <= n_pics)
{
hdu.naxis = 0;
fits_movabs_hdu (ifp, count, NULL, &status);
fits_get_img_param (ifp, 3, &hdu.bitpix, &hdu.naxis, hdu.naxisn,
&status);
/* Skip if invalid dimensions; possibly header data */
if (hdu.naxis < 2)
{
count++;
continue;
}
width = hdu.naxisn[0];
height = hdu.naxisn[1];
type = babl_type ("double");
switch (hdu.bitpix)
{
case 8:
iprecision = GIMP_PRECISION_U8_LINEAR;
if (replace)
replace_val = 255;
break;
case 16:
iprecision = GIMP_PRECISION_U16_NON_LINEAR;
if (replace)
replace_val = G_MAXSHORT;
break;
case 32:
iprecision = GIMP_PRECISION_U32_LINEAR;
if (replace)
replace_val = G_MAXINT;
break;
case -32:
iprecision = GIMP_PRECISION_FLOAT_LINEAR;
if (replace)
replace_val = G_MAXFLOAT;
break;
case -64:
iprecision = GIMP_PRECISION_DOUBLE_LINEAR;
if (replace)
replace_val = G_MAXDOUBLE;
break;
}
if (hdu.naxis == 2)
{
itype = GIMP_GRAY;
dtype = GIMP_GRAYA_IMAGE;
format = babl_format_new (babl_model ("Y'"),
type,
babl_component ("Y'"),
NULL);
}
else if (hdu.naxisn[2])
{
/* Original RGB format */
if (hdu.naxisn[0] == 3)
{
width = hdu.naxisn[1];
height = hdu.naxisn[2];
}
channels = 3;
itype = GIMP_RGB;
dtype = GIMP_RGB_IMAGE;
format = babl_format_new (babl_model ("R'G'B'"),
type,
babl_component ("R'"),
babl_component ("G'"),
babl_component ("B'"),
NULL);
}
/* If RGB FITS image, we need to read in the whole image so we can convert
* the planes format to RGB */
if (hdu.naxis == 2)
pixels = (gdouble *) malloc (width * sizeof (gdouble) * channels);
else
pixels = (gdouble *) malloc (width * height * sizeof (gdouble) * channels);
if (! image)
{
image = create_new_image (file, count, width, height,
itype, dtype, iprecision,
&layer, &buffer);
}
else
{
layer = gimp_layer_new (image, _("FITS HDU"), width, height,
dtype, 100,
gimp_image_get_default_new_layer_mode (image));
gimp_image_insert_layer (image, layer, NULL, 0);
buffer = gimp_drawable_get_buffer (GIMP_DRAWABLE (layer));
}
row_length = width * channels;
/* Calculate min/max pixel value for normalizing */
for (fpixel[1] = height; fpixel[1] >= 1; fpixel[1]--)
{
if (fits_read_pix (ifp, TDOUBLE, fpixel, row_length, NULL,
pixels, NULL, &status))
break;
for (gint ii = 0; ii < row_length; ii++)
{
if (pixels[ii] < datamin)
datamin = pixels[ii];
if (pixels[ii] > datamax)
datamax = pixels[ii];
}
}
if (status)
show_fits_errors (status);
/* Read pixel values in */
if (hdu.naxis == 2)
{
for (fpixel[1] = height; fpixel[1] >= 1; fpixel[1]--)
{
if (fits_read_pix (ifp, TDOUBLE, fpixel, row_length, &replace_val,
pixels, NULL, &status))
break;
if (datamin < datamax)
{
for (gint ii = 0; ii < row_length; ii++)
pixels[ii] = (pixels[ii] - datamin) / (datamax - datamin);
}
gegl_buffer_set (buffer,
GEGL_RECTANGLE (0, height - fpixel[1],
width, 1), 0,
format, pixels, GEGL_AUTO_ROWSTRIDE);
}
}
else if (hdu.naxisn[2] && hdu.naxisn[2] == 3)
{
gint total_size = width * height * channels;
fits_read_img (ifp, TDOUBLE, 1, total_size, &replace_val,
pixels, NULL, &status);
if (! status)
{
gdouble *temp;
temp = (gdouble *) malloc (width * height * sizeof (gdouble) * channels);
if (datamin < datamax)
{
for (gint ii = 0; ii < total_size; ii++)
pixels[ii] = (pixels[ii] - datamin) / (datamax - datamin);
}
for (gint ii = 0; ii < (total_size / 3); ii++)
{
temp[(ii * 3)] = pixels[ii];
temp[(ii * 3) + 1] = pixels[ii + (total_size / 3)];
temp[(ii * 3) + 2] = pixels[ii + ((total_size / 3) * 2)];
}
gegl_buffer_set (buffer, GEGL_RECTANGLE (0, 0, width, height), 0,
format, temp, GEGL_AUTO_ROWSTRIDE);
if (temp)
g_free (temp);
}
}
if (status)
show_fits_errors (status);
g_object_unref (buffer);
if (hdu.naxisn[2] && hdu.naxisn[2] == 3)
{
/* Per SiriL developers, FITS images should be loaded from the
* bottom up. fits_read_img () loads them from top down, so we
* should flip the layer. */
gimp_item_transform_flip_simple (GIMP_ITEM (layer),
GIMP_ORIENTATION_VERTICAL,
TRUE, -1.0);
}
if (pixels)
g_free (pixels);
count++;
}
if (! image)
{
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
"%s", _("FITS file keeps no displayable images"));
fits_close_file (ifp, &status);
return NULL;
}
/* As there might be different sized layers,
* we need to resize the canvas afterwards */
gimp_image_resize_to_layers (image);
fits_close_file (ifp, &status);
return image;
}
static gint
export_image (GFile *file,
GimpImage *image,
GimpDrawable *drawable,
GError **error)
{
GimpImageType drawable_type;
gint retval;
drawable_type = gimp_drawable_type (drawable);
/* Make sure we're not exporting an image with an alpha channel */
if (gimp_drawable_has_alpha (drawable))
{
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
"%s",
_("FITS export cannot handle images with alpha channels"));
return FALSE;
}
switch (drawable_type)
{
case GIMP_INDEXED_IMAGE: case GIMP_INDEXEDA_IMAGE:
case GIMP_GRAY_IMAGE: case GIMP_GRAYA_IMAGE:
case GIMP_RGB_IMAGE: case GIMP_RGBA_IMAGE:
break;
default:
g_message (_("Cannot operate on unknown image types."));
return (FALSE);
break;
}
gimp_progress_init_printf (_("Exporting '%s'"),
gimp_file_get_utf8_name (file));
retval = export_fits (file, image, drawable);
return retval;
}
/* Create an image. Sets layer_ID, drawable and rgn. Returns image_ID */
static GimpImage *
create_new_image (GFile *file,
guint pagenum,
guint width,
guint height,
GimpImageBaseType itype,
GimpImageType dtype,
GimpPrecision iprecision,
GimpLayer **layer,
GeglBuffer **buffer)
{
GimpImage *image;
image = gimp_image_new_with_precision (width, height, itype, iprecision);
gimp_image_undo_disable (image);
*layer = gimp_layer_new (image, _("Background"), width, height,
dtype, 100,
gimp_image_get_default_new_layer_mode (image));
gimp_image_insert_layer (image, *layer, NULL, 0);
*buffer = gimp_drawable_get_buffer (GIMP_DRAWABLE (*layer));
return image;
}
/* Export direct colors (GRAY, GRAYA, RGB, RGBA) */
static gint
export_fits (GFile *file,
GimpImage *image,
GimpDrawable *drawable)
{
fitsfile *fptr;
gint status = 0;
gint height, width, channelnum;
gint bitpix;
gint naxis = 2;
glong naxes[3];
gint export_type;
gint nelements;
void *data = NULL;
GeglBuffer *buffer;
const Babl *format, *type;
buffer = gimp_drawable_get_buffer (drawable);
width = gegl_buffer_get_width (buffer);
height = gegl_buffer_get_height (buffer);
format = gegl_buffer_get_format (buffer);
type = babl_format_get_type (format, 0);
naxes[0] = width;
naxes[1] = height;
nelements = width * height;
if (type == babl_type ("u8"))
{
bitpix = 8;
export_type = TBYTE;
}
else if (type == babl_type ("u16"))
{
bitpix = 16;
export_type = TSHORT;
}
else if (type == babl_type ("u32"))
{
bitpix = 32;
export_type = TLONG;
}
else if (type == babl_type ("half") ||
type == babl_type ("float"))
{
bitpix = -32;
type = babl_type ("float");
export_type = TFLOAT;
}
else if (type == babl_type ("double"))
{
bitpix = -64;
export_type = TDOUBLE;
}
else
{
return FALSE;
}
switch (gimp_drawable_type (drawable))
{
case GIMP_GRAY_IMAGE:
format = babl_format_new (babl_model ("Y'"),
type,
babl_component ("Y'"),
NULL);
break;
case GIMP_GRAYA_IMAGE:
format = babl_format_new (babl_model ("Y'A"),
type,
babl_component ("Y'"),
babl_component ("A"),
NULL);
break;
case GIMP_RGB_IMAGE:
case GIMP_INDEXED_IMAGE:
format = babl_format_new (babl_model ("R'G'B'"),
type,
babl_component ("R'"),
babl_component ("G'"),
babl_component ("B'"),
NULL);
naxis = 3;
naxes[2] = 3;
break;
case GIMP_RGBA_IMAGE:
case GIMP_INDEXEDA_IMAGE:
format = babl_format_new (babl_model ("R'G'B'A"),
type,
babl_component ("R'"),
babl_component ("G'"),
babl_component ("B'"),
babl_component ("A"),
NULL);
naxis = 4;
naxes[2] = 4;
break;
}
channelnum = babl_format_get_n_components (format);
/* allocate a buffer for retrieving information from the pixel region */
if (export_type == TFLOAT)
data = (gfloat *) g_malloc (width * height * sizeof (gfloat) * channelnum);
else if (export_type == TDOUBLE)
data = (gdouble *) g_malloc (width * height * sizeof (gdouble) *
channelnum);
else
data = (guchar *) g_malloc (width * height * sizeof (guchar *) *
(bitpix / 8) * channelnum);
/* CFITSIO can't overwrite files unless you start the filename
* with a "!". Instead, we'll try to open the existing file
* in READWRITE mode, clear it, and then recreate it.
*/
if (fits_create_file (&fptr, g_file_peek_path (file), &status))
{
/* You have to set status back to 0 - subsequent successful
functions do not remove the error value */
status = 0;
if (fits_open_file (&fptr, g_file_peek_path (file), READWRITE, &status))
{
show_fits_errors (status);
return FALSE;
}
fits_delete_file (fptr, &status);
if (fits_create_file (&fptr, g_file_peek_path (file), &status))
{
show_fits_errors (status);
return FALSE;
}
}
if (fits_create_img (fptr, bitpix, naxis, naxes, &status))
{
show_fits_errors (status);
return FALSE;
}
/* FITS uses signed 16/32 integers, so we need to convert the unsigned
* values to that range via an offset */
if (bitpix == 16 || bitpix == 32)
{
GeglBufferIterator *iter;
iter = gegl_buffer_iterator_new (buffer,
GEGL_RECTANGLE (0, 0, width, height), 0,
format,
GEGL_BUFFER_READWRITE,
GEGL_ABYSS_NONE, 1);
while (gegl_buffer_iterator_next (iter))
{
gint length = iter->length;
if (bitpix == 16)
{
gushort *pixel = iter->items[0].data;
gushort offset = pow (2, 15);
while (length--)
{
for (gint i = 0; i < channelnum; i++)
pixel[i] -= offset;
pixel += channelnum;
}
}
else
{
guint32 *pixel = iter->items[0].data;
guint32 offset = pow (2, 31);
while (length--)
{
for (gint i = 0; i < channelnum; i++)
pixel[i] -= offset;
pixel += channelnum;
}
}
}
}
/* Grayscale images can be exported as-is. RGB images must be
* converted into planes of RRR...GGG...BBB... */
if (naxis == 2)
{
gegl_buffer_get (buffer,
GEGL_RECTANGLE (0, 0, width, height), 1.0,
format, data,
GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
if (fits_write_img (fptr, export_type, 1, nelements, data, &status))
{
show_fits_errors (status);
return FALSE;
}
}
else
{
gdouble *rgb_data;
gdouble *rgb_output;
const Babl *rgb_format;
const Babl *output_format = babl_format ("Y' double");
const Babl *converted_format;
rgb_format = (channelnum == 3) ? babl_format ("R'G'B' double") :
babl_format ("R'G'B'A double");
/* We export a single channel at a time, so we need a
* an output format with a single channel */
converted_format = babl_format_new (babl_model ("Y'"), type,
babl_component ("Y'"),
NULL);
rgb_data = (gdouble *) g_malloc (width * height * sizeof (gdouble) *
channelnum);
rgb_output = (gdouble *) g_malloc (width * height * sizeof (gdouble));
gegl_buffer_get (buffer, GEGL_RECTANGLE (0, 0, width, height), 1.0,
rgb_format, rgb_data,
GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
for (gint rgb = 0; rgb < channelnum; rgb++)
{
gint offset = 0;
gint src_offset = 0;
void *converted_output = NULL;
for (gint i = 0; i < height - 1; i++)
{
for (gint j = 0; j < (width * channelnum); j += channelnum)
{
rgb_output[(j / channelnum) + offset] =
rgb_data[j + src_offset + rgb];
}
src_offset += width * channelnum;
offset += width;
}
if (export_type == TFLOAT)
converted_output = (gfloat *) g_malloc (width * height *
sizeof (gfloat));
else if (export_type == TDOUBLE)
converted_output = (gdouble *) g_malloc (width * height *
sizeof (gdouble));
else
converted_output = (guchar *) g_malloc (width * height *
sizeof (guchar *) *
(bitpix / 8));
babl_process (babl_fish (output_format, converted_format),
rgb_output, converted_output, nelements);
if (fits_write_img (fptr, export_type, 1, nelements,
converted_output, &status))
{
show_fits_errors (status);
return FALSE;
}
g_free (converted_output);
}
g_free (rgb_data);
g_free (rgb_output);
}
g_free (data);
g_object_unref (buffer);
/* Add history of file update */
fits_write_history (fptr,
"THIS FITS FILE WAS GENERATED BY GIMP USING CFITSIO",
&status);
gimp_progress_update (1.0);
if (fits_close_file (fptr, &status))
{
show_fits_errors (status);
return FALSE;
}
return TRUE;
}
/* Load interface functions */
static gboolean
load_dialog (GimpProcedure *procedure,
GObject *config)
{
GtkWidget *dialog;
GtkWidget *frame;
gboolean run;
gimp_ui_init (PLUG_IN_BINARY);
dialog = gimp_procedure_dialog_new (procedure,
GIMP_PROCEDURE_CONFIG (config),
_("Open FITS File"));
frame = gimp_procedure_dialog_get_widget (GIMP_PROCEDURE_DIALOG (dialog),
"replace", GIMP_TYPE_INT_RADIO_FRAME);
gtk_widget_set_margin_bottom (frame, 12);
frame = gimp_procedure_dialog_get_widget (GIMP_PROCEDURE_DIALOG (dialog),
"use-data-min-max", GIMP_TYPE_INT_RADIO_FRAME);
gtk_widget_set_margin_bottom (frame, 12);
gimp_procedure_dialog_fill (GIMP_PROCEDURE_DIALOG (dialog),
NULL);
gtk_widget_show (dialog);
run = gimp_procedure_dialog_run (GIMP_PROCEDURE_DIALOG (dialog));
gtk_widget_destroy (dialog);
return run;
}
static void
show_fits_errors (gint status)
{
gchar status_str[FLEN_STATUS];
/* Write out error messages of FITS-Library */
fits_get_errstatus (status, status_str);
g_message ("FITS: %s\n", status_str);
}
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