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gimp/plug-ins/fits/fits.c

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/* The GIMP -- an 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 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
*/
/* 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)
*/
#include "config.h"
#include <string.h>
#include <errno.h>
#include <glib/gstdio.h>
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include "fitsrw.h"
#include "libgimp/stdplugins-intl.h"
#define LOAD_PROC "file-fits-load"
#define SAVE_PROC "file-fits-save"
#define PLUG_IN_BINARY "fits"
/* Load info */
typedef struct
{
gint replace; /* replacement for blank/NaN-values */
gint use_datamin; /* Use DATAMIN/MAX-scaling if possible */
gint compose; /* compose images with naxis==3 */
} FITSLoadVals;
/* Declare some local functions.
*/
static void query (void);
static void run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals);
static gint32 load_image (const gchar *filename);
static gint save_image (const gchar *filename,
gint32 image_ID,
gint32 drawable_ID);
static FITS_HDU_LIST *create_fits_header (FITS_FILE *ofp,
guint width,
guint height,
guint bpp);
static gint save_index (FITS_FILE *ofp,
gint32 image_ID,
gint32 drawable_ID);
static gint save_direct (FITS_FILE *ofp,
gint32 image_ID,
gint32 drawable_ID);
static gint32 create_new_image (const gchar *filename,
guint pagenum,
guint width,
guint height,
GimpImageBaseType itype,
GimpImageType dtype,
gint32 *layer_ID,
GimpDrawable **drawable,
GimpPixelRgn *pixel_rgn);
static void check_load_vals (void);
static gint32 load_fits (const gchar *filename,
FITS_FILE *ifp,
guint picnum,
guint ncompose);
static gboolean load_dialog (void);
static void show_fits_errors (void);
static FITSLoadVals plvals =
{
0, /* Replace with black */
0, /* Do autoscale on pixel-values */
0 /* Dont compose images */
};
GimpPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run, /* run_proc */
};
/* The run mode */
static GimpRunMode l_run_mode;
MAIN ()
static void
query (void)
{
static GimpParamDef load_args[] =
{
{ GIMP_PDB_INT32, "run-mode", "Interactive, non-interactive" },
{ GIMP_PDB_STRING, "filename", "The name of the file to load" },
{ GIMP_PDB_STRING, "raw-filename", "The name of the file to load" },
};
static GimpParamDef load_return_vals[] =
{
{ GIMP_PDB_IMAGE, "image", "Output image" },
};
static GimpParamDef save_args[] =
{
{ GIMP_PDB_INT32, "run-mode", "Interactive, non-interactive" },
{ GIMP_PDB_IMAGE, "image", "Input image" },
{ GIMP_PDB_DRAWABLE, "drawable", "Drawable to save" },
{ GIMP_PDB_STRING, "filename", "The name of the file to save the image in" },
{ GIMP_PDB_STRING, "raw-filename", "The name of the file to save the image in" },
};
gimp_install_procedure (LOAD_PROC,
"load file of the FITS file format",
"load file of the FITS file format "
"(Flexible Image Transport System)",
"Peter Kirchgessner",
"Peter Kirchgessner (peter@kirchgessner.net)",
"1997",
N_("Flexible Image Transport System"),
NULL,
GIMP_PLUGIN,
G_N_ELEMENTS (load_args),
G_N_ELEMENTS (load_return_vals),
load_args, load_return_vals);
gimp_register_file_handler_mime (LOAD_PROC, "image/x-fits");
gimp_register_magic_load_handler (LOAD_PROC,
"fit,fits",
"",
"0,string,SIMPLE");
gimp_install_procedure (SAVE_PROC,
"save file in the FITS file format",
"FITS saving handles all image types except "
"those with alpha channels.",
"Peter Kirchgessner",
"Peter Kirchgessner (peter@kirchgessner.net)",
"1997",
N_("Flexible Image Transport System"),
"RGB, GRAY, INDEXED",
GIMP_PLUGIN,
G_N_ELEMENTS (save_args), 0,
save_args, NULL);
gimp_register_file_handler_mime (SAVE_PROC, "image/x-fits");
gimp_register_save_handler (SAVE_PROC, "fit,fits", "");
}
static void
run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals)
{
static GimpParam values[2];
GimpRunMode run_mode;
GimpPDBStatusType status = GIMP_PDB_SUCCESS;
gint32 image_ID;
gint32 drawable_ID;
GimpExportReturn export = GIMP_EXPORT_CANCEL;
l_run_mode = run_mode = (GimpRunMode)param[0].data.d_int32;
INIT_I18N ();
*nreturn_vals = 1;
*return_vals = values;
values[0].type = GIMP_PDB_STATUS;
values[0].data.d_status = GIMP_PDB_EXECUTION_ERROR;
if (strcmp (name, LOAD_PROC) == 0)
{
switch (run_mode)
{
case GIMP_RUN_INTERACTIVE:
/* Possibly retrieve data */
gimp_get_data (LOAD_PROC, &plvals);
if (!load_dialog ())
status = GIMP_PDB_CANCEL;
break;
case GIMP_RUN_NONINTERACTIVE:
if (nparams != 3)
status = GIMP_PDB_CALLING_ERROR;
break;
case GIMP_RUN_WITH_LAST_VALS:
/* Possibly retrieve data */
gimp_get_data (LOAD_PROC, &plvals);
break;
default:
break;
}
if (status == GIMP_PDB_SUCCESS)
{
check_load_vals ();
image_ID = load_image (param[1].data.d_string);
/* Write out error messages of FITS-Library */
show_fits_errors ();
if (image_ID != -1)
{
*nreturn_vals = 2;
values[1].type = GIMP_PDB_IMAGE;
values[1].data.d_image = image_ID;
}
else
{
status = GIMP_PDB_EXECUTION_ERROR;
}
/* Store plvals data */
if (status == GIMP_PDB_SUCCESS)
gimp_set_data (LOAD_PROC, &plvals, sizeof (FITSLoadVals));
}
}
else if (strcmp (name, SAVE_PROC) == 0)
{
image_ID = param[1].data.d_int32;
drawable_ID = param[2].data.d_int32;
/* eventually export the image */
switch (run_mode)
{
case GIMP_RUN_INTERACTIVE:
case GIMP_RUN_WITH_LAST_VALS:
gimp_ui_init (PLUG_IN_BINARY, FALSE);
export = gimp_export_image (&image_ID, &drawable_ID, "FITS",
(GIMP_EXPORT_CAN_HANDLE_RGB |
GIMP_EXPORT_CAN_HANDLE_GRAY |
GIMP_EXPORT_CAN_HANDLE_INDEXED));
if (export == GIMP_EXPORT_CANCEL)
{
values[0].data.d_status = GIMP_PDB_CANCEL;
return;
}
break;
default:
break;
}
switch (run_mode)
{
case GIMP_RUN_INTERACTIVE:
break;
case GIMP_RUN_NONINTERACTIVE:
/* Make sure all the arguments are there! */
if (nparams != 5)
status = GIMP_PDB_CALLING_ERROR;
break;
case GIMP_RUN_WITH_LAST_VALS:
break;
default:
break;
}
if (status == GIMP_PDB_SUCCESS)
{
if (! save_image (param[3].data.d_string, image_ID, drawable_ID))
status = GIMP_PDB_EXECUTION_ERROR;
}
if (export == GIMP_EXPORT_EXPORT)
gimp_image_delete (image_ID);
}
else
{
status = GIMP_PDB_CALLING_ERROR;
}
values[0].data.d_status = status;
}
static gint32
load_image (const gchar *filename)
{
gint32 image_ID, *image_list, *nl;
guint picnum;
gint k, n_images, max_images, hdu_picnum;
gint compose;
FILE *fp;
FITS_FILE *ifp;
FITS_HDU_LIST *hdu;
fp = g_fopen (filename, "rb");
if (!fp)
{
g_message (_("Could not open '%s' for reading: %s"),
gimp_filename_to_utf8 (filename), g_strerror (errno));
return (-1);
}
fclose (fp);
ifp = fits_open (filename, "r");
if (ifp == NULL)
{
g_message (_("Error during open of FITS file"));
return (-1);
}
if (ifp->n_pic <= 0)
{
g_message (_("FITS file keeps no displayable images"));
fits_close (ifp);
return (-1);
}
image_list = g_new (gint32, 10);
n_images = 0;
max_images = 10;
for (picnum = 1; picnum <= ifp->n_pic; )
{
/* Get image info to see if we can compose them */
hdu = fits_image_info (ifp, picnum, &hdu_picnum);
if (hdu == NULL) break;
/* Get number of FITS-images to compose */
compose = ( plvals.compose && (hdu_picnum == 1) && (hdu->naxis == 3)
&& (hdu->naxisn[2] > 1) && (hdu->naxisn[2] <= 4));
if (compose)
compose = hdu->naxisn[2];
else
compose = 1; /* Load as GRAY */
image_ID = load_fits (filename, ifp, picnum, compose);
/* Write out error messages of FITS-Library */
show_fits_errors ();
if (image_ID == -1) break;
if (n_images == max_images)
{
nl = (gint32 *)g_realloc (image_list, (max_images+10)*sizeof (gint32));
if (nl == NULL) break;
image_list = nl;
max_images += 10;
}
image_list[n_images++] = image_ID;
picnum += compose;
}
/* Write out error messages of FITS-Library */
show_fits_errors ();
fits_close (ifp);
/* Display images in reverse order. The last will be displayed by GIMP itself*/
if (l_run_mode != GIMP_RUN_NONINTERACTIVE)
{
for (k = n_images-1; k >= 1; k--)
{
gimp_image_undo_enable (image_list[k]);
gimp_image_clean_all (image_list[k]);
gimp_display_new (image_list[k]);
}
}
image_ID = (n_images > 0) ? image_list[0] : -1;
g_free (image_list);
return (image_ID);
}
static gint
save_image (const gchar *filename,
gint32 image_ID,
gint32 drawable_ID)
{
FITS_FILE* ofp;
GimpImageType drawable_type;
gint retval;
drawable_type = gimp_drawable_type (drawable_ID);
/* Make sure we're not saving an image with an alpha channel */
if (gimp_drawable_has_alpha (drawable_ID))
{
g_message (_("FITS save 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;
}
/* Open the output file. */
ofp = fits_open (filename, "w");
if (!ofp)
{
g_message (_("Could not open '%s' for writing: %s"),
gimp_filename_to_utf8 (filename), g_strerror (errno));
return (FALSE);
}
gimp_progress_init (NULL);
gimp_progress_set_text (_("Saving '%s'..."),
gimp_filename_to_utf8 (filename));
if ((drawable_type == GIMP_INDEXED_IMAGE) ||
(drawable_type == GIMP_INDEXEDA_IMAGE))
retval = save_index (ofp,image_ID, drawable_ID);
else
retval = save_direct (ofp,image_ID, drawable_ID);
fits_close (ofp);
return (retval);
}
/* Check (and correct) the load values plvals */
static void
check_load_vals (void)
{
if (plvals.replace > 255) plvals.replace = 255;
}
/* Create an image. Sets layer_ID, drawable and rgn. Returns image_ID */
static gint32
create_new_image (const gchar *filename,
guint pagenum,
guint width,
guint height,
GimpImageBaseType itype,
GimpImageType dtype,
gint32 *layer_ID,
GimpDrawable **drawable,
GimpPixelRgn *pixel_rgn)
{
gint32 image_ID;
char *tmp;
image_ID = gimp_image_new (width, height, itype);
if ((tmp = g_malloc (strlen (filename) + 64)) != NULL)
{
sprintf (tmp, "%s-img%ld", filename, (long)pagenum);
gimp_image_set_filename (image_ID, tmp);
g_free (tmp);
}
else
gimp_image_set_filename (image_ID, filename);
gimp_image_undo_disable (image_ID);
*layer_ID = gimp_layer_new (image_ID, _("Background"), width, height,
dtype, 100, GIMP_NORMAL_MODE);
gimp_image_add_layer (image_ID, *layer_ID, 0);
*drawable = gimp_drawable_get (*layer_ID);
gimp_pixel_rgn_init (pixel_rgn, *drawable, 0, 0, (*drawable)->width,
(*drawable)->height, TRUE, FALSE);
return (image_ID);
}
/* Load FITS image. ncompose gives the number of FITS-images which have */
/* to be composed together. This will result in different GIMP image types: */
/* 1: GRAY, 2: GRAYA, 3: RGB, 4: RGBA */
static gint32
load_fits (const gchar *filename,
FITS_FILE *ifp,
guint picnum,
guint ncompose)
{
register guchar *dest, *src;
guchar *data, *data_end, *linebuf;
int width, height, tile_height, scan_lines;
int i, j, channel, max_scan;
double a, b;
gint32 layer_ID, image_ID;
GimpPixelRgn pixel_rgn;
GimpDrawable *drawable;
GimpImageBaseType itype;
GimpImageType dtype;
gint err = 0;
FITS_HDU_LIST *hdulist;
FITS_PIX_TRANSFORM trans;
hdulist = fits_seek_image (ifp, (int)picnum);
if (hdulist == NULL) return (-1);
width = hdulist->naxisn[0]; /* Set the size of the FITS image */
height = hdulist->naxisn[1];
if (ncompose == 2) { itype = GIMP_GRAY; dtype = GIMP_GRAYA_IMAGE; }
else if (ncompose == 3) { itype = GIMP_RGB; dtype = GIMP_RGB_IMAGE; }
else if (ncompose == 4) { itype = GIMP_RGB; dtype = GIMP_RGBA_IMAGE; }
else { ncompose = 1; itype = GIMP_GRAY; dtype = GIMP_GRAY_IMAGE;}
image_ID = create_new_image (filename, picnum, width, height, itype, dtype,
&layer_ID, &drawable, &pixel_rgn);
tile_height = gimp_tile_height ();
data = g_malloc (tile_height * width * ncompose);
if (data == NULL) return (-1);
data_end = data + tile_height * width * ncompose;
/* If the transformation from pixel value to */
/* data value has been specified, use it */
if ( plvals.use_datamin
&& hdulist->used.datamin && hdulist->used.datamax
&& hdulist->used.bzero && hdulist->used.bscale)
{
a = (hdulist->datamin - hdulist->bzero) / hdulist->bscale;
b = (hdulist->datamax - hdulist->bzero) / hdulist->bscale;
if (a < b) trans.pixmin = a, trans.pixmax = b;
else trans.pixmin = b, trans.pixmax = a;
}
else
{
trans.pixmin = hdulist->pixmin;
trans.pixmax = hdulist->pixmax;
}
trans.datamin = 0.0;
trans.datamax = 255.0;
trans.replacement = plvals.replace;
trans.dsttyp = 'c';
/* FITS stores images with bottom row first. Therefore we have */
/* to fill the image from bottom to top. */
if (ncompose == 1)
{
dest = data + tile_height * width;
scan_lines = 0;
for (i = 0; i < height; i++)
{
/* Read FITS line */
dest -= width;
if (fits_read_pixel (ifp, hdulist, width, &trans, dest) != width)
{
err = 1;
break;
}
scan_lines++;
if ((i % 20) == 0)
gimp_progress_update ((gdouble) (i + 1) / (gdouble) height);
if ((scan_lines == tile_height) || ((i+1) == height))
{
gimp_pixel_rgn_set_rect (&pixel_rgn, dest, 0, height-i-1,
width, scan_lines);
scan_lines = 0;
dest = data + tile_height * width;
}
if (err) break;
}
}
else /* multiple images to compose */
{
linebuf = g_malloc (width);
if (linebuf == NULL) return (-1);
for (channel = 0; channel < ncompose; channel++)
{
dest = data + tile_height * width * ncompose + channel;
scan_lines = 0;
for (i = 0; i < height; i++)
{
if ((channel > 0) && ((i % tile_height) == 0))
{ /* Reload a region for follow up channels */
max_scan = tile_height;
if (i + tile_height > height) max_scan = height - i;
gimp_pixel_rgn_get_rect (&pixel_rgn,
data_end-max_scan*width*ncompose,
0, height-i-max_scan, width,
max_scan);
}
/* Read FITS scanline */
dest -= width*ncompose;
if (fits_read_pixel (ifp, hdulist, width, &trans, linebuf) != width)
{
err = 1;
break;
}
j = width;
src = linebuf;
while (j--)
{
*dest = *(src++);
dest += ncompose;
}
dest -= width*ncompose;
scan_lines++;
if ((i % 20) == 0)
gimp_progress_update ((gdouble) (channel * height + i + 1) /
(gdouble) (height * ncompose));
if ((scan_lines == tile_height) || ((i+1) == height))
{
gimp_pixel_rgn_set_rect (&pixel_rgn, dest-channel,
0, height-i-1, width, scan_lines);
scan_lines = 0;
dest = data + tile_height * width * ncompose + channel;
}
if (err) break;
}
}
g_free (linebuf);
}
g_free (data);
if (err)
g_message (_("EOF encountered on reading"));
gimp_drawable_flush (drawable);
return (err ? -1 : image_ID);
}
static FITS_HDU_LIST *
create_fits_header (FITS_FILE *ofp,
guint width,
guint height,
guint bpp)
{
FITS_HDU_LIST *hdulist;
int print_ctype3 = 0; /* The CTYPE3-card may not be FITS-conforming */
static char *ctype3_card[] =
{
NULL, NULL, NULL, /* bpp = 0: no additional card */
"COMMENT Image type within GIMP: GIMP_GRAY_IMAGE",
NULL,
NULL,
"COMMENT Image type within GIMP: GIMP_GRAYA_IMAGE (gray with alpha channel)",
"COMMENT Sequence for NAXIS3 : GRAY, ALPHA",
"CTYPE3 = 'GRAYA ' / GRAY IMAGE WITH ALPHA CHANNEL",
"COMMENT Image type within GIMP: GIMP_RGB_IMAGE",
"COMMENT Sequence for NAXIS3 : RED, GREEN, BLUE",
"CTYPE3 = 'RGB ' / RGB IMAGE",
"COMMENT Image type within GIMP: GIMP_RGBA_IMAGE (rgb with alpha channel)",
"COMMENT Sequence for NAXIS3 : RED, GREEN, BLUE, ALPHA",
"CTYPE3 = 'RGBA ' / RGB IMAGE WITH ALPHA CHANNEL"
};
hdulist = fits_add_hdu (ofp);
if (hdulist == NULL) return (NULL);
hdulist->used.simple = 1;
hdulist->bitpix = 8;
hdulist->naxis = (bpp == 1) ? 2 : 3;
hdulist->naxisn[0] = width;
hdulist->naxisn[1] = height;
hdulist->naxisn[2] = bpp;
hdulist->used.datamin = 1;
hdulist->datamin = 0.0;
hdulist->used.datamax = 1;
hdulist->datamax = 255.0;
hdulist->used.bzero = 1;
hdulist->bzero = 0.0;
hdulist->used.bscale = 1;
hdulist->bscale = 1.0;
fits_add_card (hdulist, "");
fits_add_card (hdulist,
"HISTORY THIS FITS FILE WAS GENERATED BY GIMP USING FITSRW");
fits_add_card (hdulist, "");
fits_add_card (hdulist,
"COMMENT FitsRW is (C) Peter Kirchgessner (peter@kirchgessner.net), but available");
fits_add_card (hdulist,
"COMMENT under the GNU general public licence."),
fits_add_card (hdulist,
"COMMENT For sources see http://www.kirchgessner.net");
fits_add_card (hdulist, "");
fits_add_card (hdulist, ctype3_card[bpp*3]);
if (ctype3_card[bpp*3+1] != NULL)
fits_add_card (hdulist, ctype3_card[bpp*3+1]);
if (print_ctype3 && (ctype3_card[bpp*3+2] != NULL))
fits_add_card (hdulist, ctype3_card[bpp*3+2]);
fits_add_card (hdulist, "");
return (hdulist);
}
/* Save direct colours (GRAY, GRAYA, RGB, RGBA) */
static gint
save_direct (FITS_FILE *ofp,
gint32 image_ID,
gint32 drawable_ID)
{
int height, width, i, j, channel;
int tile_height, bpp, bpsl;
long nbytes;
guchar *data, *src;
GimpPixelRgn pixel_rgn;
GimpDrawable *drawable;
GimpImageType drawable_type;
FITS_HDU_LIST *hdu;
drawable = gimp_drawable_get (drawable_ID);
drawable_type = gimp_drawable_type (drawable_ID);
width = drawable->width;
height = drawable->height;
bpp = drawable->bpp; /* Bytes per pixel */
bpsl = width * bpp; /* Bytes per scanline */
tile_height = gimp_tile_height ();
gimp_pixel_rgn_init (&pixel_rgn, drawable, 0, 0, width, height, FALSE, FALSE);
/* allocate a buffer for retrieving information from the pixel region */
src = data = (unsigned char *)g_malloc (width * height * bpp);
hdu = create_fits_header (ofp, width, height, bpp);
if (hdu == NULL) return (FALSE);
if (fits_write_header (ofp, hdu) < 0) return (FALSE);
#define GET_DIRECT_TILE(begin) \
{int scan_lines; \
scan_lines = (i+tile_height-1 < height) ? tile_height : (height-i); \
gimp_pixel_rgn_get_rect (&pixel_rgn, begin, 0, height-i-scan_lines, \
width, scan_lines); \
src = begin+bpsl*(scan_lines-1)+channel; }
nbytes = 0;
for (channel = 0; channel < bpp; channel++)
{
for (i = 0; i < height; i++)
{
if ((i % tile_height) == 0) GET_DIRECT_TILE (data); /* get more data */
if (bpp == 1) /* One channel only ? Write the scanline */
{
fwrite (src, 1, width, ofp->fp);
src += bpsl;
}
else /* Multiple channels */
{
for (j = 0; j < width; j++) /* Write out bytes for current channel */
{
putc (*src, ofp->fp);
src += bpp;
}
}
nbytes += bpsl;
src -= 2*bpsl;
if ((i % 20) == 0)
gimp_progress_update ((gdouble) (i + channel * height) /
(gdouble) (height * bpp));
}
}
nbytes = nbytes % FITS_RECORD_SIZE;
if (nbytes)
{
while (nbytes++ < FITS_RECORD_SIZE)
putc (0, ofp->fp);
}
g_free (data);
gimp_drawable_detach (drawable);
if (ferror (ofp->fp))
{
g_message (_("Write error occurred"));
return (FALSE);
}
return (TRUE);
#undef GET_DIRECT_TILE
}
/* Save indexed colours (INDEXED, INDEXEDA) */
static gint
save_index (FITS_FILE *ofp,
gint32 image_ID,
gint32 drawable_ID)
{
int height, width, i, j, channel;
int tile_height, bpp, bpsl, ncols;
long nbytes;
guchar *data, *src, *cmap, *cmapptr;
guchar red[256], green[256], blue[256];
guchar *channels[3];
GimpPixelRgn pixel_rgn;
GimpDrawable *drawable;
GimpImageType drawable_type;
FITS_HDU_LIST *hdu;
channels[0] = red; channels[1] = green; channels[2] = blue;
drawable = gimp_drawable_get (drawable_ID);
drawable_type = gimp_drawable_type (drawable_ID);
width = drawable->width;
height = drawable->height;
bpp = drawable->bpp; /* Bytes per pixel */
bpsl = width * bpp; /* Bytes per scanline */
tile_height = gimp_tile_height ();
gimp_pixel_rgn_init (&pixel_rgn, drawable, 0, 0, width, height, FALSE, FALSE);
/* allocate a buffer for retrieving information from the pixel region */
src = data = (guchar *)g_malloc (width * height * bpp);
cmapptr = cmap = gimp_image_get_colormap (image_ID, &ncols);
if (ncols > sizeof (red)) ncols = sizeof (red);
for (i = 0; i < ncols; i++)
{
red[i] = *(cmapptr++);
green[i] = *(cmapptr++);
blue[i] = *(cmapptr++);
}
for (i = ncols; i < sizeof (red); i++)
red[i] = green[i] = blue[i] = 0;
hdu = create_fits_header (ofp, width, height, bpp+2);
if (hdu == NULL) return (FALSE);
if (fits_write_header (ofp, hdu) < 0) return (FALSE);
#define GET_INDEXED_TILE(begin) \
{int scan_lines; \
scan_lines = (i+tile_height-1 < height) ? tile_height : (height-i); \
gimp_pixel_rgn_get_rect (&pixel_rgn, begin, 0, height-i-scan_lines, \
width, scan_lines); \
src = begin+bpsl*(scan_lines-1); }
nbytes = 0;
/* Write the RGB-channels */
for (channel = 0; channel < 3; channel++)
{
cmapptr = channels[channel];
for (i = 0; i < height; i++)
{
if ((i % tile_height) == 0)
GET_INDEXED_TILE (data); /* get more data */
for (j = 0; j < width; j++) /* Write out bytes for current channel */
{
putc (cmapptr[*src], ofp->fp);
src += bpp;
}
nbytes += width;
src -= 2*bpsl;
}
if ((i % 20) == 0)
gimp_progress_update ((gdouble) (i + channel * height) /
(gdouble) (height * (bpp + 2)));
}
/* Write the Alpha-channel */
if (bpp > 1)
{
for (i = 0; i < height; i++)
{
if ((i % tile_height) == 0)
{
GET_INDEXED_TILE (data); /* get more data */
src++; /* Step to alpha channel data */
}
for (j = 0; j < width; j++) /* Write out bytes for alpha channel */
{
putc (*src, ofp->fp);
src += bpp;
}
nbytes += width;
src -= 2*bpsl;
}
if ((i % 20) == 0)
gimp_progress_update ((gdouble) (i + channel * height) /
(gdouble) (height * (bpp + 2)));
}
nbytes = nbytes % FITS_RECORD_SIZE;
if (nbytes)
{
while (nbytes++ < FITS_RECORD_SIZE)
putc (0, ofp->fp);
}
g_free (data);
gimp_drawable_detach (drawable);
if (ferror (ofp->fp))
{
g_message (_("Write error occurred"));
return (FALSE);
}
return (TRUE);
#undef GET_INDEXED_TILE
}
/* Load interface functions */
static gboolean
load_dialog (void)
{
GtkWidget *dialog;
GtkWidget *vbox;
GtkWidget *frame;
gboolean run;
gimp_ui_init (PLUG_IN_BINARY, FALSE);
dialog = gimp_dialog_new (_("Load FITS File"), PLUG_IN_BINARY,
NULL, 0,
gimp_standard_help_func, LOAD_PROC,
GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
GTK_STOCK_OK, GTK_RESPONSE_OK,
NULL);
gtk_dialog_set_alternative_button_order (GTK_DIALOG (dialog),
GTK_RESPONSE_OK,
GTK_RESPONSE_CANCEL,
-1);
vbox = gtk_vbox_new (FALSE, 12);
gtk_container_set_border_width (GTK_CONTAINER (vbox), 12);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dialog)->vbox), vbox,
TRUE, TRUE, 0);
gtk_widget_show (vbox);
frame = gimp_int_radio_group_new (TRUE, _("Replacement for undefined pixels"),
G_CALLBACK (gimp_radio_button_update),
&plvals.replace, plvals.replace,
_("Black"), 0, NULL,
_("White"), 255, NULL,
NULL);
gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
frame =
gimp_int_radio_group_new (TRUE, _("Pixel value scaling"),
G_CALLBACK (gimp_radio_button_update),
&plvals.use_datamin, plvals.use_datamin,
_("Automatic"), FALSE, NULL,
_("By DATAMIN/DATAMAX"), TRUE, NULL,
NULL);
gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
frame =
gimp_int_radio_group_new (TRUE, _("Image Composing"),
G_CALLBACK (gimp_radio_button_update),
&plvals.compose, plvals.compose,
_("None"), FALSE, NULL,
"NAXIS=3, NAXIS3=2,...,4", TRUE, NULL,
NULL);
gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
gtk_widget_show (dialog);
run = (gimp_dialog_run (GIMP_DIALOG (dialog)) == GTK_RESPONSE_OK);
gtk_widget_destroy (dialog);
return run;
}
static void
show_fits_errors (void)
{
gchar *msg;
/* Write out error messages of FITS-Library */
while ((msg = fits_get_error ()) != NULL)
g_message (msg);
}
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