gimp/app/core/gimpbrushgenerated-load.c

239 lines
6.3 KiB
C

/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimp_brush_generated module Copyright 1998 Jay Cox <jaycox@earthlink.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 <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <glib-object.h>
#include <glib/gstdio.h>
#include "libgimpbase/gimpbase.h"
#include "core-types.h"
#include "base/temp-buf.h"
#include "gimpbrushgenerated.h"
#include "gimpbrushgenerated-load.h"
#include "gimp-intl.h"
GList *
gimp_brush_generated_load (GimpContext *context,
const gchar *filename,
GError **error)
{
GimpBrush *brush;
FILE *file;
gchar string[256];
gint linenum;
gchar *name = NULL;
GimpBrushGeneratedShape shape = GIMP_BRUSH_GENERATED_CIRCLE;
gboolean have_shape = FALSE;
gint spikes = 2;
gdouble spacing;
gdouble radius;
gdouble hardness;
gdouble aspect_ratio;
gdouble angle;
g_return_val_if_fail (filename != NULL, NULL);
g_return_val_if_fail (g_path_is_absolute (filename), NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
file = g_fopen (filename, "rb");
if (! file)
{
g_set_error (error, GIMP_DATA_ERROR, GIMP_DATA_ERROR_OPEN,
_("Could not open '%s' for reading: %s"),
gimp_filename_to_utf8 (filename), g_strerror (errno));
return NULL;
}
/* make sure the file we are reading is the right type */
errno = 0;
linenum = 1;
if (! fgets (string, sizeof (string), file))
goto failed;
if (! g_str_has_prefix (string, "GIMP-VBR"))
{
g_set_error (error, GIMP_DATA_ERROR, GIMP_DATA_ERROR_READ,
_("Fatal parse error in brush file '%s': "
"Not a GIMP brush file."),
gimp_filename_to_utf8 (filename));
goto failed;
}
/* make sure we are reading a compatible version */
errno = 0;
linenum++;
if (! fgets (string, sizeof (string), file))
goto failed;
if (! g_str_has_prefix (string, "1.0"))
{
if (! g_str_has_prefix (string, "1.5"))
{
g_set_error (error, GIMP_DATA_ERROR, GIMP_DATA_ERROR_READ,
_("Fatal parse error in brush file '%s': "
"Unknown GIMP brush version in line %d."),
gimp_filename_to_utf8 (filename), linenum);
goto failed;
}
else
{
have_shape = TRUE;
}
}
/* read name */
errno = 0;
linenum++;
if (! fgets (string, sizeof (string), file))
goto failed;
g_strstrip (string);
/* the empty string is not an allowed name */
if (strlen (string) < 1)
g_strlcpy (string, _("Untitled"), sizeof (string));
name = gimp_any_to_utf8 (string, -1,
_("Invalid UTF-8 string in brush file '%s'."),
gimp_filename_to_utf8 (filename));
if (have_shape)
{
GEnumClass *enum_class;
GEnumValue *shape_val;
enum_class = g_type_class_peek (GIMP_TYPE_BRUSH_GENERATED_SHAPE);
/* read shape */
errno = 0;
linenum++;
if (! fgets (string, sizeof (string), file))
goto failed;
g_strstrip (string);
shape_val = g_enum_get_value_by_nick (enum_class, string);
if (! shape_val)
{
g_set_error (error, GIMP_DATA_ERROR, GIMP_DATA_ERROR_READ,
_("Fatal parse error in brush file '%s': "
"Unknown GIMP brush shape in line %d."),
gimp_filename_to_utf8 (filename), linenum);
goto failed;
}
shape = shape_val->value;
}
/* read brush spacing */
errno = 0;
linenum++;
if (! fgets (string, sizeof (string), file))
goto failed;
spacing = g_ascii_strtod (string, NULL);
/* read brush radius */
errno = 0;
linenum++;
if (! fgets (string, sizeof (string), file))
goto failed;
radius = g_ascii_strtod (string, NULL);
if (have_shape)
{
/* read number of spikes */
errno = 0;
linenum++;
if (! fgets (string, sizeof (string), file))
goto failed;
spikes = CLAMP (atoi (string), 2, 20);
}
/* read brush hardness */
errno = 0;
linenum++;
if (! fgets (string, sizeof (string), file))
goto failed;
hardness = g_ascii_strtod (string, NULL);
/* read brush aspect_ratio */
errno = 0;
linenum++;
if (! fgets (string, sizeof (string), file))
goto failed;
aspect_ratio = g_ascii_strtod (string, NULL);
/* read brush angle */
errno = 0;
linenum++;
if (! fgets (string, sizeof (string), file))
goto failed;
angle = g_ascii_strtod (string, NULL);
fclose (file);
brush = GIMP_BRUSH (gimp_brush_generated_new (name, shape, radius, spikes,
hardness, aspect_ratio, angle));
g_free (name);
brush->spacing = spacing;
return g_list_prepend (NULL, brush);
failed:
fclose (file);
if (name)
g_free (name);
if (error && *error == NULL)
{
gchar *msg;
if (errno)
msg = g_strdup_printf (_("Line %d: %s"), linenum, g_strerror (errno));
else
msg = g_strdup_printf (_("File is truncated in line %d"), linenum);
g_set_error (error, GIMP_DATA_ERROR, GIMP_DATA_ERROR_READ,
_("Error while reading brush file '%s': %s"),
gimp_filename_to_utf8 (filename), msg);
g_free (msg);
}
return NULL;
}