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gimp/app/core/gimppattern-load.c

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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* 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>
#include <stdio.h>
#include <sys/types.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <fcntl.h>
#include <glib.h>
#include <glib/gstdio.h>
#ifdef G_OS_WIN32
#include <io.h>
#endif
#ifndef _O_BINARY
#define _O_BINARY 0
#endif
#include <cairo.h>
#include <gegl.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include "libgimpbase/gimpbase.h"
#include "libgimpcolor/gimpcolor.h"
#include "core-types.h"
#include "gimppattern.h"
#include "gimppattern-header.h"
#include "gimppattern-load.h"
#include "gimptempbuf.h"
#include "gimp-intl.h"
GList *
gimp_pattern_load (GimpContext *context,
GFile *file,
GError **error)
{
GimpPattern *pattern = NULL;
const Babl *format = NULL;
gchar *path;
gint fd;
PatternHeader header;
gint bn_size;
gchar *name = NULL;
g_return_val_if_fail (G_IS_FILE (file), NULL);
path = g_file_get_path (file);
g_return_val_if_fail (g_path_is_absolute (path), NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
fd = g_open (path, O_RDONLY | _O_BINARY, 0);
g_free (path);
if (fd == -1)
{
g_set_error (error, GIMP_DATA_ERROR, GIMP_DATA_ERROR_OPEN,
_("Could not open '%s' for reading: %s"),
gimp_file_get_utf8_name (file), g_strerror (errno));
return NULL;
}
/* Read in the header size */
if (read (fd, &header, sizeof (header)) != sizeof (header))
{
g_set_error (error, GIMP_DATA_ERROR, GIMP_DATA_ERROR_READ,
_("Fatal parse error in pattern file '%s': "
"File appears truncated."),
gimp_file_get_utf8_name (file));
goto error;
}
/* rearrange the bytes in each unsigned int */
header.header_size = g_ntohl (header.header_size);
header.version = g_ntohl (header.version);
header.width = g_ntohl (header.width);
header.height = g_ntohl (header.height);
header.bytes = g_ntohl (header.bytes);
header.magic_number = g_ntohl (header.magic_number);
/* Check for correct file format */
if (header.magic_number != GPATTERN_MAGIC || header.version != 1 ||
header.header_size <= sizeof (header))
{
g_set_error (error, GIMP_DATA_ERROR, GIMP_DATA_ERROR_READ,
_("Fatal parse error in pattern file '%s': "
"Unknown pattern format version %d."),
gimp_file_get_utf8_name (file), header.version);
goto error;
}
/* Check for supported bit depths */
if (header.bytes < 1 || header.bytes > 4)
{
g_set_error (error, GIMP_DATA_ERROR, GIMP_DATA_ERROR_READ,
_("Fatal parse error in pattern file '%s: "
"Unsupported pattern depth %d.\n"
"GIMP Patterns must be GRAY or RGB."),
gimp_file_get_utf8_name (file), header.bytes);
goto error;
}
/* Read in the pattern name */
if ((bn_size = (header.header_size - sizeof (header))))
{
gchar *utf8;
name = g_new (gchar, bn_size);
if ((read (fd, name, bn_size)) < bn_size)
{
g_set_error (error, GIMP_DATA_ERROR, GIMP_DATA_ERROR_READ,
_("Fatal parse error in pattern file '%s': "
"File appears truncated."),
gimp_file_get_utf8_name (file));
g_free (name);
goto error;
}
utf8 = gimp_any_to_utf8 (name, -1,
_("Invalid UTF-8 string in pattern file '%s'."),
gimp_file_get_utf8_name (file));
g_free (name);
name = utf8;
}
if (! name)
name = g_strdup (_("Unnamed"));
pattern = g_object_new (GIMP_TYPE_PATTERN,
"name", name,
"mime-type", "image/x-gimp-pat",
NULL);
g_free (name);
switch (header.bytes)
{
case 1: format = babl_format ("Y' u8"); break;
case 2: format = babl_format ("Y'A u8"); break;
case 3: format = babl_format ("R'G'B' u8"); break;
case 4: format = babl_format ("R'G'B'A u8"); break;
}
pattern->mask = gimp_temp_buf_new (header.width, header.height, format);
if (read (fd, gimp_temp_buf_get_data (pattern->mask),
header.width * header.height * header.bytes) <
header.width * header.height * header.bytes)
{
g_set_error (error, GIMP_DATA_ERROR, GIMP_DATA_ERROR_READ,
_("Fatal parse error in pattern file '%s': "
"File appears truncated."),
gimp_file_get_utf8_name (file));
goto error;
}
close (fd);
return g_list_prepend (NULL, pattern);
error:
if (pattern)
g_object_unref (pattern);
close (fd);
return NULL;
}
GList *
gimp_pattern_load_pixbuf (GimpContext *context,
GFile *file,
GError **error)
{
GimpPattern *pattern;
GdkPixbuf *pixbuf;
gchar *path;
gchar *name;
g_return_val_if_fail (G_IS_FILE (file), NULL);
path = g_file_get_path (file);
g_return_val_if_fail (g_path_is_absolute (path), NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
pixbuf = gdk_pixbuf_new_from_file (path, error);
g_free (path);
if (! pixbuf)
return NULL;
name = g_strdup (gdk_pixbuf_get_option (pixbuf, "tEXt::Title"));
if (! name)
name = g_strdup (gdk_pixbuf_get_option (pixbuf, "tEXt::Comment"));
if (! name)
name = g_path_get_basename (gimp_file_get_utf8_name (file));
pattern = g_object_new (GIMP_TYPE_PATTERN,
"name", name,
"mime-type", NULL, /* FIXME!! */
NULL);
g_free (name);
pattern->mask = gimp_temp_buf_new_from_pixbuf (pixbuf, NULL);
g_object_unref (pixbuf);
return g_list_prepend (NULL, pattern);
}
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