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gimp/app/core/gimppattern-load.c

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/* The GIMP -- an 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 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <errno.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <fcntl.h>
#include <glib-object.h>
#ifdef G_OS_WIN32
#include <io.h>
#endif
#ifndef _O_BINARY
#define _O_BINARY 0
#endif
#include "core-types.h"
#include "config/gimpbaseconfig.h"
#include "base/temp-buf.h"
#include "gimpimage.h"
#include "gimppattern.h"
#include "gimppattern-header.h"
#include "libgimp/gimpintl.h"
static void gimp_pattern_class_init (GimpPatternClass *klass);
static void gimp_pattern_init (GimpPattern *pattern);
static void gimp_pattern_finalize (GObject *object);
static gsize gimp_pattern_get_memsize (GimpObject *object);
static gboolean gimp_pattern_get_popup_size (GimpViewable *viewable,
gint width,
gint height,
gboolean dot_for_dot,
gint *popup_width,
gint *popup_heigh);
static TempBuf * gimp_pattern_get_new_preview (GimpViewable *viewable,
gint width,
gint height);
static gchar * gimp_pattern_get_extension (GimpData *data);
static GimpData * gimp_pattern_duplicate (GimpData *data,
gboolean stingy_memory_use);
static GimpDataClass *parent_class = NULL;
GType
gimp_pattern_get_type (void)
{
static GType pattern_type = 0;
if (! pattern_type)
{
static const GTypeInfo pattern_info =
{
sizeof (GimpPatternClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gimp_pattern_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GimpPattern),
0, /* n_preallocs */
(GInstanceInitFunc) gimp_pattern_init,
};
pattern_type = g_type_register_static (GIMP_TYPE_DATA,
"GimpPattern",
&pattern_info, 0);
}
return pattern_type;
}
static void
gimp_pattern_class_init (GimpPatternClass *klass)
{
GObjectClass *object_class;
GimpObjectClass *gimp_object_class;
GimpViewableClass *viewable_class;
GimpDataClass *data_class;
object_class = G_OBJECT_CLASS (klass);
gimp_object_class = GIMP_OBJECT_CLASS (klass);
viewable_class = GIMP_VIEWABLE_CLASS (klass);
data_class = GIMP_DATA_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
object_class->finalize = gimp_pattern_finalize;
gimp_object_class->get_memsize = gimp_pattern_get_memsize;
viewable_class->get_popup_size = gimp_pattern_get_popup_size;
viewable_class->get_new_preview = gimp_pattern_get_new_preview;
data_class->get_extension = gimp_pattern_get_extension;
data_class->duplicate = gimp_pattern_duplicate;
}
static void
gimp_pattern_init (GimpPattern *pattern)
{
pattern->mask = NULL;
}
static void
gimp_pattern_finalize (GObject *object)
{
GimpPattern *pattern;
pattern = GIMP_PATTERN (object);
if (pattern->mask)
{
temp_buf_free (pattern->mask);
pattern->mask = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gsize
gimp_pattern_get_memsize (GimpObject *object)
{
GimpPattern *pattern;
gsize memsize = 0;
pattern = GIMP_PATTERN (object);
if (pattern->mask)
memsize += temp_buf_get_memsize (pattern->mask);
return memsize + GIMP_OBJECT_CLASS (parent_class)->get_memsize (object);
}
static gboolean
gimp_pattern_get_popup_size (GimpViewable *viewable,
gint width,
gint height,
gboolean dot_for_dot,
gint *popup_width,
gint *popup_height)
{
GimpPattern *pattern;
pattern = GIMP_PATTERN (viewable);
if (pattern->mask->width > width || pattern->mask->height > height)
{
*popup_width = pattern->mask->width;
*popup_height = pattern->mask->height;
return TRUE;
}
return FALSE;
}
static TempBuf *
gimp_pattern_get_new_preview (GimpViewable *viewable,
gint width,
gint height)
{
GimpPattern *pattern;
TempBuf *temp_buf;
gint copy_width;
gint copy_height;
pattern = GIMP_PATTERN (viewable);
copy_width = MIN (width, pattern->mask->width);
copy_height = MIN (height, pattern->mask->height);
temp_buf = temp_buf_new (copy_width, copy_height,
pattern->mask->bytes,
0, 0, NULL);
temp_buf_copy_area (pattern->mask, temp_buf,
0, 0, copy_width, copy_height, 0, 0);
return temp_buf;
}
static gchar *
gimp_pattern_get_extension (GimpData *data)
{
return GIMP_PATTERN_FILE_EXTENSION;
}
static GimpData *
gimp_pattern_duplicate (GimpData *data,
gboolean stingy_memory_use)
{
GimpPattern *pattern;
pattern = GIMP_PATTERN (g_object_new (GIMP_TYPE_PATTERN, NULL));
pattern->mask = temp_buf_copy (GIMP_PATTERN (data)->mask, NULL);
/* Swap the pattern to disk (if we're being stingy with memory) */
if (stingy_memory_use)
temp_buf_swap (pattern->mask);
return GIMP_DATA (pattern);
}
GimpData *
gimp_pattern_new (const gchar *name,
gboolean stingy_memory_use)
{
GimpPattern *pattern;
guchar *data;
gint row, col;
g_return_val_if_fail (name != NULL, NULL);
pattern = GIMP_PATTERN (g_object_new (GIMP_TYPE_PATTERN, NULL));
gimp_object_set_name (GIMP_OBJECT (pattern), name);
pattern->mask = temp_buf_new (32, 32, 3, 0, 0, NULL);
data = temp_buf_data (pattern->mask);
for (row = 0; row < pattern->mask->height; row++)
for (col = 0; col < pattern->mask->width; col++)
{
memset (data, (col % 2) && (row % 2) ? 255 : 0, 3);
data += 3;
}
/* Swap the pattern to disk (if we're being stingy with memory) */
if (stingy_memory_use)
temp_buf_swap (pattern->mask);
return GIMP_DATA (pattern);
}
GimpData *
gimp_pattern_get_standard (void)
{
static GimpPattern *standard_pattern = NULL;
if (! standard_pattern)
{
guchar *data;
gint row, col;
standard_pattern = GIMP_PATTERN (g_object_new (GIMP_TYPE_PATTERN, NULL));
gimp_object_set_name (GIMP_OBJECT (standard_pattern), "Standard");
standard_pattern->mask = temp_buf_new (32, 32, 3, 0, 0, NULL);
data = temp_buf_data (standard_pattern->mask);
for (row = 0; row < standard_pattern->mask->height; row++)
for (col = 0; col < standard_pattern->mask->width; col++)
{
memset (data, (col % 2) && (row % 2) ? 255 : 0, 3);
data += 3;
}
/* set ref_count to 2 --> never swap the standard pattern */
g_object_ref (standard_pattern);
}
return GIMP_DATA (standard_pattern);
}
GimpData *
gimp_pattern_load (const gchar *filename,
gboolean stingy_memory_use,
GError **error)
{
GimpPattern *pattern = NULL;
gint fd;
PatternHeader header;
gint bn_size;
gchar *name = NULL;
g_return_val_if_fail (filename != NULL, NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
fd = open (filename, O_RDONLY | _O_BINARY);
if (fd == -1)
{
g_set_error (error, GIMP_DATA_ERROR, GIMP_DATA_ERROR_OPEN,
_("Could not open '%s' for reading: %s"),
filename, 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,
_("Could not read %d bytes from '%s': %s"),
(gint) sizeof (header), filename, g_strerror (errno));
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,
_("Unknown pattern format version %d in '%s'."),
header.version, filename);
goto error;
}
/* Check for supported bit depths */
if (header.bytes != 1 && header.bytes != 3)
{
g_set_error (error, GIMP_DATA_ERROR, GIMP_DATA_ERROR_READ,
_("Unsupported pattern depth %d\n"
"in file '%s'.\n"
"GIMP Patterns must be GRAY or RGB.\n"),
header.bytes, filename);
goto error;
}
/* Read in the pattern name */
if ((bn_size = (header.header_size - sizeof (header))))
{
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,
_("Error in GIMP pattern file '%s'."),
filename);
goto error;
}
if (!g_utf8_validate (name, -1, NULL))
{
g_message (_("Invalid UTF-8 string in pattern file '%s'."),
filename);
g_free (name);
name = NULL;
}
}
if (!name)
name = g_strdup (_("Unnamed"));
pattern = GIMP_PATTERN (g_object_new (GIMP_TYPE_PATTERN, NULL));
pattern->mask = temp_buf_new (header.width, header.height, header.bytes,
0, 0, NULL);
if (read (fd, temp_buf_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 parsing error: "
"Pattern file '%s' appears truncated."),
filename);
goto error;
}
close (fd);
gimp_object_set_name (GIMP_OBJECT (pattern), name);
g_free (name);
gimp_data_set_filename (GIMP_DATA (pattern), filename);
/* Swap the pattern to disk (if we're being stingy with memory) */
if (stingy_memory_use)
temp_buf_swap (pattern->mask);
GIMP_DATA (pattern)->dirty = FALSE;
return GIMP_DATA (pattern);
error:
if (pattern)
g_object_unref (pattern);
else if (name)
g_free (name);
close (fd);
return NULL;
}
TempBuf *
gimp_pattern_get_mask (const GimpPattern *pattern)
{
g_return_val_if_fail (GIMP_IS_PATTERN (pattern), NULL);
return pattern->mask;
}
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