PIKApp/app/core/pikamybrush-load.c

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2023-09-26 00:35:21 +02:00
/* PIKA - Photo and Image Kooker Application
* a rebranding of The GNU Image Manipulation Program (created with heckimp)
* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
*
* Original copyright, applying to most contents (license remains unchanged):
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* pikamybrush-load.c
*
* 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 <gdk-pixbuf/gdk-pixbuf.h>
#include <gegl.h>
#include <mypaint-brush.h>
#include "libpikabase/pikabase.h"
#include "core-types.h"
#include "pikamybrush.h"
#include "pikamybrush-load.h"
#include "pikamybrush-private.h"
#include "pika-intl.h"
/* public functions */
GList *
pika_mybrush_load (PikaContext *context,
GFile *file,
GInputStream *input,
GError **error)
{
PikaMybrush *brush = NULL;
MyPaintBrush *mypaint_brush;
GdkPixbuf *pixbuf;
GFileInfo *info;
guint64 size;
guchar *buffer;
gchar *path;
gchar *basename;
gchar *preview_filename;
gchar *p;
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);
info = g_file_query_info (file,
G_FILE_ATTRIBUTE_STANDARD_SIZE,
G_FILE_QUERY_INFO_NONE,
NULL, error);
if (! info)
return NULL;
size = g_file_info_get_attribute_uint64 (info,
G_FILE_ATTRIBUTE_STANDARD_SIZE);
g_object_unref (info);
if (size > 32768)
{
g_set_error (error, PIKA_DATA_ERROR, PIKA_DATA_ERROR_READ,
_("MyPaint brush file is unreasonably large, skipping."));
return NULL;
}
buffer = g_new0 (guchar, size + 1);
if (! g_input_stream_read_all (input, buffer, size, NULL, NULL, error))
{
g_free (buffer);
return NULL;
}
mypaint_brush = mypaint_brush_new ();
mypaint_brush_from_defaults (mypaint_brush);
if (! mypaint_brush_from_string (mypaint_brush, (const gchar *) buffer))
{
g_set_error (error, PIKA_DATA_ERROR, PIKA_DATA_ERROR_READ,
_("Failed to deserialize MyPaint brush."));
mypaint_brush_unref (mypaint_brush);
g_free (buffer);
return NULL;
}
path = g_file_get_path (file);
basename = g_strndup (path, strlen (path) - 4);
g_free (path);
preview_filename = g_strconcat (basename, "_prev.png", NULL);
g_free (basename);
pixbuf = gdk_pixbuf_new_from_file_at_size (preview_filename,
48, 48, error);
g_free (preview_filename);
basename = g_path_get_basename (pika_file_get_utf8_name (file));
basename[strlen (basename) - 4] = '\0';
for (p = basename; *p; p++)
if (*p == '_' || *p == '-')
*p = ' ';
brush = g_object_new (PIKA_TYPE_MYBRUSH,
"name", basename,
"mime-type", "image/x-pika-myb",
"icon-pixbuf", pixbuf,
NULL);
g_free (basename);
if (pixbuf)
g_object_unref (pixbuf);
brush->priv->brush_json = (gchar *) buffer;
brush->priv->radius =
mypaint_brush_get_base_value (mypaint_brush,
MYPAINT_BRUSH_SETTING_RADIUS_LOGARITHMIC);
brush->priv->opaque =
mypaint_brush_get_base_value (mypaint_brush,
MYPAINT_BRUSH_SETTING_OPAQUE);
brush->priv->hardness =
mypaint_brush_get_base_value (mypaint_brush,
MYPAINT_BRUSH_SETTING_HARDNESS);
brush->priv->eraser =
mypaint_brush_get_base_value (mypaint_brush,
MYPAINT_BRUSH_SETTING_ERASER) > 0.5f;
brush->priv->offset_by_random =
mypaint_brush_get_base_value (mypaint_brush,
MYPAINT_BRUSH_SETTING_OFFSET_BY_RANDOM);
mypaint_brush_unref (mypaint_brush);
return g_list_prepend (NULL, brush);
}