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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* cel.c -- KISS CEL file format plug-in
* (copyright) 1997,1998 Nick Lamb (njl195@zepler.org.uk)
*
* 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/>.
*/
#include "config.h"
#include <errno.h>
#include <string.h>
#include <glib/gstdio.h>
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include "libgimp/stdplugins-intl.h"
#define LOAD_PROC "file-cel-load"
#define SAVE_PROC "file-cel-save"
#define PLUG_IN_BINARY "file-cel"
#define PLUG_IN_ROLE "gimp-file-cel"
static void query (void);
static void run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals);
static gint load_palette (const gchar *file,
FILE *fp,
guchar palette[],
GError **error);
static gint32 load_image (const gchar *file,
GError **error);
static gboolean save_image (GFile *file,
gint32 image,
gint32 layer,
GError **error);
static void palette_dialog (const gchar *title);
static gboolean need_palette (const gchar *file,
GError **error);
/* Globals... */
const GimpPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run, /* run_proc */
};
static gchar *palette_file = NULL;
static gsize data_length = 0;
/* Let GIMP library handle initialisation (and inquisitive users) */
MAIN ()
/* GIMP queries plug-in for parameters etc. */
static void
query (void)
{
static const GimpParamDef load_args[] =
{
{ GIMP_PDB_INT32, "run-mode", "The run mode { RUN-INTERACTIVE (0), RUN-NONINTERACTIVE (1) }" },
{ GIMP_PDB_STRING, "filename", "Filename to load image from" },
{ GIMP_PDB_STRING, "raw-filename", "Name entered" },
{ GIMP_PDB_STRING, "palette-filename", "Filename to load palette from" }
};
static const GimpParamDef load_return_vals[] =
{
{ GIMP_PDB_IMAGE, "image", "Output image" }
};
static const GimpParamDef save_args[] =
{
{ GIMP_PDB_INT32, "run-mode", "The run mode { RUN-INTERACTIVE (0), RUN-NONINTERACTIVE (1) }" },
{ GIMP_PDB_IMAGE, "image", "Input image" },
{ GIMP_PDB_DRAWABLE, "drawable", "Drawable to export" },
{ GIMP_PDB_STRING, "filename", "Filename to export image to" },
{ GIMP_PDB_STRING, "raw-filename", "Name entered" },
{ GIMP_PDB_STRING, "palette-filename", "Filename to save palette to" },
};
gimp_install_procedure (LOAD_PROC,
"Loads files in KISS CEL file format",
"This plug-in loads individual KISS cell files.",
"Nick Lamb",
"Nick Lamb <njl195@zepler.org.uk>",
"May 1998",
N_("KISS CEL"),
NULL,
GIMP_PLUGIN,
G_N_ELEMENTS (load_args),
G_N_ELEMENTS (load_return_vals),
load_args, load_return_vals);
gimp_register_magic_load_handler (LOAD_PROC,
"cel",
"",
"0,string,KiSS\\040");
gimp_install_procedure (SAVE_PROC,
"Exports files in KISS CEL file format",
"This plug-in exports individual KISS cell files.",
"Nick Lamb",
"Nick Lamb <njl195@zepler.org.uk>",
"May 1998",
N_("KISS CEL"),
"RGB*, INDEXED*",
GIMP_PLUGIN,
G_N_ELEMENTS (save_args), 0,
save_args, NULL);
gimp_register_file_handler_uri (SAVE_PROC);
gimp_register_save_handler (SAVE_PROC, "cel", "");
}
static void
run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals)
{
static GimpParam values[2]; /* Return values */
GimpRunMode run_mode;
gint32 image_ID;
gint32 drawable_ID;
GimpPDBStatusType status = GIMP_PDB_SUCCESS;
gint32 image;
GimpExportReturn export = GIMP_EXPORT_CANCEL;
GError *error = NULL;
gint needs_palette = 0;
INIT_I18N ();
gegl_init (NULL, NULL);
run_mode = param[0].data.d_int32;
/* Set up default return values */
*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)
{
if (run_mode != GIMP_RUN_NONINTERACTIVE)
{
data_length = gimp_get_data_size (SAVE_PROC);
if (data_length > 0)
{
palette_file = g_malloc (data_length);
gimp_get_data (SAVE_PROC, palette_file);
}
else
{
palette_file = g_strdup ("*.kcf");
data_length = strlen (palette_file) + 1;
}
}
if (run_mode == GIMP_RUN_NONINTERACTIVE)
{
palette_file = param[3].data.d_string;
if (palette_file)
data_length = strlen (palette_file) + 1;
else
data_length = 0;
}
else if (run_mode == GIMP_RUN_INTERACTIVE)
{
/* Let user choose KCF palette (cancel ignores) */
needs_palette = need_palette (param[1].data.d_string, &error);
if (! error)
{
if (needs_palette)
palette_dialog (_("Load KISS Palette"));
gimp_set_data (SAVE_PROC, palette_file, data_length);
}
}
if (! error)
{
image = load_image (param[1].data.d_string,
&error);
if (image != -1)
{
*nreturn_vals = 2;
values[1].type = GIMP_PDB_IMAGE;
values[1].data.d_image = image;
}
else
{
status = GIMP_PDB_EXECUTION_ERROR;
}
}
else
{
status = GIMP_PDB_EXECUTION_ERROR;
}
}
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, "CEL",
GIMP_EXPORT_CAN_HANDLE_RGB |
GIMP_EXPORT_CAN_HANDLE_ALPHA |
GIMP_EXPORT_CAN_HANDLE_INDEXED);
if (export == GIMP_EXPORT_CANCEL)
{
values[0].data.d_status = GIMP_PDB_CANCEL;
return;
}
break;
default:
break;
}
if (save_image (g_file_new_for_uri (param[3].data.d_string),
image_ID, drawable_ID, &error))
{
if (data_length)
{
gimp_set_data (SAVE_PROC, palette_file, data_length);
}
}
else
{
status = GIMP_PDB_EXECUTION_ERROR;
}
if (export == GIMP_EXPORT_EXPORT)
gimp_image_delete (image_ID);
}
else
{
status = GIMP_PDB_CALLING_ERROR;
}
if (status != GIMP_PDB_SUCCESS && error)
{
*nreturn_vals = 2;
values[1].type = GIMP_PDB_STRING;
values[1].data.d_string = error->message;
}
values[0].data.d_status = status;
}
/* Peek into the file to determine whether we need a palette */
static gboolean
need_palette (const gchar *file,
GError **error)
{
FILE *fp;
guchar header[32];
size_t n_read;
fp = g_fopen (file, "rb");
if (fp == NULL)
{
g_set_error (error, G_FILE_ERROR, g_file_error_from_errno (errno),
_("Could not open '%s' for reading: %s"),
gimp_filename_to_utf8 (file), g_strerror (errno));
return FALSE;
}
n_read = fread (header, 32, 1, fp);
fclose (fp);
if (n_read < 1)
{
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
_("EOF or error while reading image header"));
return FALSE;
}
return (header[5] < 32);
}
/* Load CEL image into GIMP */
static gint32
load_image (const gchar *file,
GError **error)
{
FILE *fp; /* Read file pointer */
guchar header[32], /* File header */
file_mark, /* KiSS file type */
bpp; /* Bits per pixel */
gint height, width, /* Dimensions of image */
offx, offy, /* Layer offsets */
colors; /* Number of colors */
gint32 image, /* Image */
layer; /* Layer */
guchar *buf; /* Temporary buffer */
guchar *line; /* Pixel data */
GeglBuffer *buffer; /* Buffer for layer */
gint i, j, k; /* Counters */
size_t n_read; /* Number of items read from file */
gimp_progress_init_printf (_("Opening '%s'"),
gimp_filename_to_utf8 (file));
/* Open the file for reading */
fp = g_fopen (file, "r");
if (fp == NULL)
{
g_set_error (error, G_FILE_ERROR, g_file_error_from_errno (errno),
_("Could not open '%s' for reading: %s"),
gimp_filename_to_utf8 (file), g_strerror (errno));
return -1;
}
/* Get the image dimensions and create the image... */
n_read = fread (header, 4, 1, fp);
if (n_read < 1)
{
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
_("EOF or error while reading image header"));
fclose (fp);
return -1;
}
if (strncmp ((const gchar *) header, "KiSS", 4))
{
colors= 16;
bpp = 4;
width = header[0] + (256 * header[1]);
height = header[2] + (256 * header[3]);
offx= 0;
offy= 0;
}
else
{ /* New-style image file, read full header */
n_read = fread (header, 28, 1, fp);
if (n_read < 1)
{
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
_("EOF or error while reading image header"));
fclose (fp);
return -1;
}
file_mark = header[0];
if (file_mark != 0x20 && file_mark != 0x21)
{
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
_("is not a CEL image file"));
fclose (fp);
return -1;
}
bpp = header[1];
switch (bpp)
{
case 4:
case 8:
case 32:
colors = (1 << bpp);
break;
default:
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
_("illegal bpp value in image: %hhu"), bpp);
fclose (fp);
return -1;
}
width = header[4] + (256 * header[5]);
height = header[6] + (256 * header[7]);
offx = header[8] + (256 * header[9]);
offy = header[10] + (256 * header[11]);
}
if ((width == 0) || (height == 0) || (width + offx > GIMP_MAX_IMAGE_SIZE) ||
(height + offy > GIMP_MAX_IMAGE_SIZE))
{
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
_("illegal image dimensions: width: %d, horizontal offset: "
"%d, height: %d, vertical offset: %d"),
width, offx, height, offy);
fclose (fp);
return -1;
}
if (bpp == 32)
image = gimp_image_new (width + offx, height + offy, GIMP_RGB);
else
image = gimp_image_new (width + offx, height + offy, GIMP_INDEXED);
if (image == -1)
{
g_set_error (error, 0, 0, _("Can't create a new image"));
fclose (fp);
return -1;
}
gimp_image_set_filename (image, file);
/* Create an indexed-alpha layer to hold the image... */
if (bpp == 32)
layer = gimp_layer_new (image, _("Background"), width, height,
GIMP_RGBA_IMAGE,
100,
gimp_image_get_default_new_layer_mode (image));
else
layer = gimp_layer_new (image, _("Background"), width, height,
GIMP_INDEXEDA_IMAGE,
100,
gimp_image_get_default_new_layer_mode (image));
gimp_image_insert_layer (image, layer, -1, 0);
gimp_layer_set_offsets (layer, offx, offy);
/* Get the drawable and set the pixel region for our load... */
buffer = gimp_drawable_get_buffer (layer);
/* Read the image in and give it to GIMP a line at a time */
buf = g_new (guchar, width * 4);
line = g_new (guchar, (width + 1) * 4);
for (i = 0; i < height && !feof(fp); ++i)
{
switch (bpp)
{
case 4:
n_read = fread (buf, (width + 1) / 2, 1, fp);
if (n_read < 1)
{
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
_("EOF or error while reading image data"));
fclose (fp);
return -1;
}
for (j = 0, k = 0; j < width * 2; j+= 4, ++k)
{
if (buf[k] / 16 == 0)
{
line[j] = 16;
line[j+ 1 ] = 0;
}
else
{
line[j] = (buf[k] / 16) - 1;
line[j + 1] = 255;
}
if (buf[k] % 16 == 0)
{
line[j + 2] = 16;
line[j + 3] = 0;
}
else
{
line[j + 2] = (buf[k] % 16) - 1;
line[j + 3] = 255;
}
}
break;
case 8:
n_read = fread (buf, width, 1, fp);
if (n_read < 1)
{
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
_("EOF or error while reading image data"));
fclose (fp);
return -1;
}
for (j = 0, k = 0; j < width * 2; j+= 2, ++k)
{
if (buf[k] == 0)
{
line[j] = 255;
line[j + 1] = 0;
}
else
{
line[j] = buf[k] - 1;
line[j + 1] = 255;
}
}
break;
case 32:
n_read = fread (line, width * 4, 1, fp);
if (n_read < 1)
{
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
_("EOF or error while reading image data"));
fclose (fp);
return -1;
}
/* The CEL file order is BGR so we need to swap B and R
* to get the Gimp RGB order.
*/
for (j= 0; j < width; j++)
{
guint8 tmp = line[j*4];
line[j*4] = line[j*4+2];
line[j*4+2] = tmp;
}
break;
default:
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
_("Unsupported bit depth (%d)!"), bpp);
fclose (fp);
return -1;
}
gegl_buffer_set (buffer, GEGL_RECTANGLE (0, i, width, 1), 0,
NULL, line, GEGL_AUTO_ROWSTRIDE);
gimp_progress_update ((float) i / (float) height);
}
/* Close image files, give back allocated memory */
fclose (fp);
g_free (buf);
g_free (line);
if (bpp != 32)
{
/* Use palette from file or otherwise default grey palette */
guchar palette[256 * 3];
/* Open the file for reading if user picked one */
if (palette_file == NULL)
{
fp = NULL;
}
else
{
fp = g_fopen (palette_file, "r");
if (fp == NULL)
{
g_set_error (error, G_FILE_ERROR, g_file_error_from_errno (errno),
_("Could not open '%s' for reading: %s"),
gimp_filename_to_utf8 (palette_file),
g_strerror (errno));
return -1;
}
}
if (fp != NULL)
{
colors = load_palette (palette_file, fp, palette, error);
fclose (fp);
if (colors < 0 || *error)
return -1;
}
else
{
for (i= 0; i < colors; ++i)
{
palette[i * 3] = palette[i * 3 + 1] = palette[i * 3 + 2]= i * 256 / colors;
}
}
gimp_image_set_colormap (image, palette + 3, colors - 1);
}
/* Now get everything redrawn and hand back the finished image */
g_object_unref (buffer);
gimp_progress_update (1.0);
return image;
}
static gint
load_palette (const gchar *file,
FILE *fp,
guchar palette[],
GError **error)
{
guchar header[32]; /* File header */
guchar buffer[2];
guchar file_mark, bpp;
gint i, colors = 0;
size_t n_read;
n_read = fread (header, 4, 1, fp);
if (n_read < 1)
{
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
_("'%s': EOF or error while reading palette header"),
gimp_filename_to_utf8 (file));
return -1;
}
if (!strncmp ((const gchar *) header, "KiSS", 4))
{
n_read = fread (header+4, 28, 1, fp);
if (n_read < 1)
{
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
_("'%s': EOF or error while reading palette header"),
gimp_filename_to_utf8 (file));
return -1;
}
file_mark = header[4];
if (file_mark != 0x10)
{
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
_("'%s': is not a KCF palette file"),
gimp_filename_to_utf8 (file));
return -1;
}
bpp = header[5];
if (bpp != 12 && bpp != 24)
{
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
_("'%s': illegal bpp value in palette: %hhu"),
gimp_filename_to_utf8 (file), bpp);
return -1;
}
colors = header[8] + header[9] * 256;
if (colors != 16 && colors != 256)
{
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
_("'%s': illegal number of colors: %u"),
gimp_filename_to_utf8 (file), colors);
return -1;
}
switch (bpp)
{
case 12:
for (i = 0; i < colors; ++i)
{
n_read = fread (buffer, 1, 2, fp);
if (n_read < 2)
{
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
_("'%s': EOF or error while reading "
"palette data"),
gimp_filename_to_utf8 (file));
return -1;
}
palette[i*3]= buffer[0] & 0xf0;
palette[i*3+1]= (buffer[1] & 0x0f) * 16;
palette[i*3+2]= (buffer[0] & 0x0f) * 16;
}
break;
case 24:
n_read = fread (palette, colors, 3, fp);
if (n_read < 3)
{
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
_("'%s': EOF or error while reading palette data"),
gimp_filename_to_utf8 (file));
return -1;
}
break;
default:
g_assert_not_reached ();
}
}
else
{
colors = 16;
fseek (fp, 0, SEEK_SET);
for (i= 0; i < colors; ++i)
{
n_read = fread (buffer, 1, 2, fp);
if (n_read < 2)
{
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
_("'%s': EOF or error while reading palette data"),
gimp_filename_to_utf8 (file));
return -1;
}
palette[i*3] = buffer[0] & 0xf0;
palette[i*3+1] = (buffer[1] & 0x0f) * 16;
palette[i*3+2] = (buffer[0] & 0x0f) * 16;
}
}
return colors;
}
static gboolean
save_image (GFile *file,
gint32 image,
gint32 layer,
GError **error)
{
GOutputStream *output;
GeglBuffer *buffer;
const Babl *format;
GCancellable *cancellable;
gint width;
gint height;
guchar header[32]; /* File header */
gint bpp; /* Bit per pixel */
gint colors; /* Number of colors */
gint type; /* type of layer */
gint offx, offy; /* Layer offsets */
guchar *buf = NULL; /* Temporary buffer */
guchar *line = NULL; /* Pixel data */
gint i, j, k; /* Counters */
/* Check that this is an indexed image, fail otherwise */
type = gimp_drawable_type (layer);
if (type == GIMP_INDEXEDA_IMAGE)
{
bpp = 4;
format = NULL;
}
else
{
bpp = 32;
format = babl_format ("R'G'B'A u8");
}
/* Find out how offset this layer was */
gimp_drawable_offsets (layer, &offx, &offy);
buffer = gimp_drawable_get_buffer (layer);
width = gegl_buffer_get_width (buffer);
height = gegl_buffer_get_height (buffer);
gimp_progress_init_printf (_("Exporting '%s'"),
gimp_file_get_utf8_name (file));
output = G_OUTPUT_STREAM (g_file_replace (file,
NULL, FALSE, G_FILE_CREATE_NONE,
NULL, error));
if (output)
{
GOutputStream *buffered;
buffered = g_buffered_output_stream_new (output);
g_object_unref (output);
output = buffered;
}
else
{
return FALSE;
}
/* Headers */
memset (header, 0, 32);
strcpy ((gchar *) header, "KiSS");
header[4]= 0x20;
/* Work out whether to save as 8bit or 4bit */
if (bpp < 32)
{
g_free (gimp_image_get_colormap (image, &colors));
if (colors > 15)
{
header[5] = 8;
}
else
{
header[5] = 4;
}
}
else
{
header[5] = 32;
}
/* Fill in the blanks ... */
header[8] = width % 256;
header[9] = width / 256;
header[10] = height % 256;
header[11] = height / 256;
header[12] = offx % 256;
header[13] = offx / 256;
header[14] = offy % 256;
header[15] = offy / 256;
if (! g_output_stream_write_all (output, header, 32, NULL,
NULL, error))
goto fail;
/* Arrange for memory etc. */
buf = g_new (guchar, width * 4);
line = g_new (guchar, (width + 1) * 4);
/* Get the image from GIMP one line at a time and write it out */
for (i = 0; i < height; ++i)
{
gegl_buffer_get (buffer, GEGL_RECTANGLE (0, i, width, 1), 1.0,
format, line,
GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
memset (buf, 0, width);
if (bpp == 32)
{
for (j = 0; j < width; j++)
{
buf[4 * j] = line[4 * j + 2]; /* B */
buf[4 * j + 1] = line[4 * j + 1]; /* G */
buf[4 * j + 2] = line[4 * j + 0]; /* R */
buf[4 * j + 3] = line[4 * j + 3]; /* Alpha */
}
if (! g_output_stream_write_all (output, buf, width * 4, NULL,
NULL, error))
goto fail;
}
else if (colors > 16)
{
for (j = 0, k = 0; j < width * 2; j += 2, ++k)
{
if (line[j + 1] > 127)
{
buf[k]= line[j] + 1;
}
}
if (! g_output_stream_write_all (output, buf, width, NULL,
NULL, error))
goto fail;
}
else
{
for (j = 0, k = 0; j < width * 2; j+= 4, ++k)
{
buf[k] = 0;
if (line[j + 1] > 127)
{
buf[k] += (line[j] + 1)<< 4;
}
if (line[j + 3] > 127)
{
buf[k] += (line[j + 2] + 1);
}
}
if (! g_output_stream_write_all (output, buf, width + 1 / 2, NULL,
NULL, error))
goto fail;
}
gimp_progress_update ((float) i / (float) height);
}
if (! g_output_stream_close (output, NULL, error))
goto fail;
gimp_progress_update (1.0);
g_free (buf);
g_free (line);
g_object_unref (buffer);
g_object_unref (output);
return TRUE;
fail:
cancellable = g_cancellable_new ();
g_cancellable_cancel (cancellable);
g_output_stream_close (output, cancellable, NULL);
g_object_unref (cancellable);
g_free (buf);
g_free (line);
g_object_unref (buffer);
g_object_unref (output);
return FALSE;
}
static void
palette_dialog (const gchar *title)
{
GtkWidget *dialog;
gimp_ui_init (PLUG_IN_BINARY, FALSE);
dialog = gtk_file_chooser_dialog_new (title, NULL,
GTK_FILE_CHOOSER_ACTION_OPEN,
_("_Cancel"), GTK_RESPONSE_CANCEL,
_("_Open"), GTK_RESPONSE_OK,
NULL);
gtk_dialog_set_alternative_button_order (GTK_DIALOG (dialog),
GTK_RESPONSE_OK,
GTK_RESPONSE_CANCEL,
-1);
gtk_file_chooser_set_filename (GTK_FILE_CHOOSER (dialog), palette_file);
gtk_dialog_set_default_response (GTK_DIALOG (dialog), GTK_RESPONSE_OK);
gtk_widget_show (dialog);
if (gtk_dialog_run (GTK_DIALOG (dialog)) == GTK_RESPONSE_OK)
{
g_free (palette_file);
palette_file = gtk_file_chooser_get_filename (GTK_FILE_CHOOSER (dialog));
data_length = strlen (palette_file) + 1;
}
gtk_widget_destroy (dialog);
}
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