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/* 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 <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <stdlib.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <gegl.h>
#include "libgimpbase/gimpbase.h"
#include "core-types.h"
#include "gimp-utils.h"
#include "gimpbrushgenerated.h"
#include "gimpbrushgenerated-load.h"
#include "gimp-intl.h"
GList *
gimp_brush_generated_load (GimpContext *context,
GFile *file,
GInputStream *input,
GError **error)
{
GimpBrush *brush;
GDataInputStream *data_input;
gchar *string;
gsize string_len;
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 (G_IS_FILE (file), NULL);
g_return_val_if_fail (G_IS_INPUT_STREAM (input), NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
data_input = g_data_input_stream_new (input);
/* make sure the file we are reading is the right type */
linenum = 1;
string_len = 256;
string = gimp_data_input_stream_read_line_always (data_input, &string_len,
NULL, error);
if (! string)
goto failed;
if (! g_str_has_prefix (string, "GIMP-VBR"))
{
g_set_error (error, GIMP_DATA_ERROR, GIMP_DATA_ERROR_READ,
_("Not a GIMP brush file."));
g_free (string);
goto failed;
}
g_free (string);
/* make sure we are reading a compatible version */
linenum++;
string_len = 256;
string = gimp_data_input_stream_read_line_always (data_input, &string_len,
NULL, error);
if (! string)
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,
_("Unknown GIMP brush version."));
g_free (string);
goto failed;
}
else
{
have_shape = TRUE;
}
}
g_free (string);
/* read name */
linenum++;
string_len = 256;
string = gimp_data_input_stream_read_line_always (data_input, &string_len,
NULL, error);
if (! string)
goto failed;
g_strstrip (string);
/* the empty string is not an allowed name */
if (strlen (string) < 1)
{
name = g_strdup (_("Untitled"));
}
else
{
name = gimp_any_to_utf8 (string, -1,
_("Invalid UTF-8 string in brush file '%s'."),
gimp_file_get_utf8_name (file));
}
g_free (string);
if (have_shape)
{
GEnumClass *enum_class;
GEnumValue *shape_val;
enum_class = g_type_class_peek (GIMP_TYPE_BRUSH_GENERATED_SHAPE);
/* read shape */
linenum++;
string_len = 256;
string = gimp_data_input_stream_read_line_always (data_input, &string_len,
NULL, error);
if (! string)
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,
_("Unknown GIMP brush shape."));
g_free (string);
goto failed;
}
g_free (string);
shape = shape_val->value;
}
/* read brush spacing */
linenum++;
string_len = 256;
string = gimp_data_input_stream_read_line_always (data_input, &string_len,
NULL, error);
if (! string)
goto failed;
if (! gimp_ascii_strtod (string, NULL, &spacing))
{
g_set_error (error, GIMP_DATA_ERROR, GIMP_DATA_ERROR_READ,
_("Invalid brush spacing."));
g_free (string);
goto failed;
}
g_free (string);
/* read brush radius */
linenum++;
string_len = 256;
string = gimp_data_input_stream_read_line_always (data_input, &string_len,
NULL, error);
if (! string)
goto failed;
if (! gimp_ascii_strtod (string, NULL, &radius))
{
g_set_error (error, GIMP_DATA_ERROR, GIMP_DATA_ERROR_READ,
_("Invalid brush radius."));
g_free (string);
goto failed;
}
g_free (string);
if (have_shape)
{
/* read number of spikes */
linenum++;
string_len = 256;
string = gimp_data_input_stream_read_line_always (data_input, &string_len,
NULL, error);
if (! string)
goto failed;
if (! gimp_ascii_strtoi (string, NULL, 10, &spikes) ||
spikes < 2 || spikes > 20)
{
g_set_error (error, GIMP_DATA_ERROR, GIMP_DATA_ERROR_READ,
_("Invalid brush spike count."));
g_free (string);
goto failed;
}
g_free (string);
}
/* read brush hardness */
linenum++;
string_len = 256;
string = gimp_data_input_stream_read_line_always (data_input, &string_len,
NULL, error);
if (! string)
goto failed;
if (! gimp_ascii_strtod (string, NULL, &hardness))
{
g_set_error (error, GIMP_DATA_ERROR, GIMP_DATA_ERROR_READ,
_("Invalid brush hardness."));
g_free (string);
goto failed;
}
g_free (string);
/* read brush aspect_ratio */
linenum++;
string_len = 256;
string = gimp_data_input_stream_read_line_always (data_input, &string_len,
NULL, error);
if (! string)
goto failed;
if (! gimp_ascii_strtod (string, NULL, &aspect_ratio))
{
g_set_error (error, GIMP_DATA_ERROR, GIMP_DATA_ERROR_READ,
_("Invalid brush aspect ratio."));
g_free (string);
goto failed;
}
g_free (string);
/* read brush angle */
linenum++;
string_len = 256;
string = gimp_data_input_stream_read_line_always (data_input, &string_len,
NULL, error);
if (! string)
goto failed;
if (! gimp_ascii_strtod (string, NULL, &angle))
{
g_set_error (error, GIMP_DATA_ERROR, GIMP_DATA_ERROR_READ,
_("Invalid brush angle."));
g_free (string);
goto failed;
}
g_free (string);
g_object_unref (data_input);
brush = GIMP_BRUSH (gimp_brush_generated_new (name, shape, radius, spikes,
hardness, aspect_ratio, angle));
g_free (name);
gimp_brush_set_spacing (brush, spacing);
return g_list_prepend (NULL, brush);
failed:
g_object_unref (data_input);
if (name)
g_free (name);
g_prefix_error (error, _("In line %d of brush file: "), linenum);
return NULL;
}
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