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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 <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 <gtk/gtk.h>
#ifdef G_OS_WIN32
#include <io.h>
#endif
#ifndef _O_BINARY
#define _O_BINARY 0
#endif
#include "core-types.h"
#include "gimpimage.h"
#include "gimppattern.h"
#include "gimppattern-header.h"
#include "gimprc.h"
#include "temp_buf.h"
#include "libgimp/gimpintl.h"
static void gimp_pattern_class_init (GimpPatternClass *klass);
static void gimp_pattern_init (GimpPattern *pattern);
static void gimp_pattern_destroy (GtkObject *object);
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);
static GimpDataClass *parent_class = NULL;
GtkType
gimp_pattern_get_type (void)
{
static GtkType pattern_type = 0;
if (! pattern_type)
{
static const GtkTypeInfo pattern_info =
{
"GimpPattern",
sizeof (GimpPattern),
sizeof (GimpPatternClass),
(GtkClassInitFunc) gimp_pattern_class_init,
(GtkObjectInitFunc) gimp_pattern_init,
/* reserved_1 */ NULL,
/* reserved_2 */ NULL,
(GtkClassInitFunc) NULL
};
pattern_type = gtk_type_unique (GIMP_TYPE_DATA, &pattern_info);
}
return pattern_type;
}
static void
gimp_pattern_class_init (GimpPatternClass *klass)
{
GtkObjectClass *object_class;
GimpViewableClass *viewable_class;
GimpDataClass *data_class;
object_class = (GtkObjectClass *) klass;
viewable_class = (GimpViewableClass *) klass;
data_class = (GimpDataClass *) klass;
parent_class = gtk_type_class (GIMP_TYPE_DATA);
object_class->destroy = gimp_pattern_destroy;
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_destroy (GtkObject *object)
{
GimpPattern *pattern;
pattern = GIMP_PATTERN (object);
if (pattern->mask)
temp_buf_free (pattern->mask);
if (GTK_OBJECT_CLASS (parent_class)->destroy)
GTK_OBJECT_CLASS (parent_class)->destroy (object);
}
static TempBuf *
gimp_pattern_get_new_preview (GimpViewable *viewable,
gint width,
gint height)
{
GimpPattern *pattern;
TempBuf *temp_buf;
guchar white[MAX_CHANNELS] = { 255, 255, 255, 255 };
gint copy_width;
gint copy_height;
gint x, y;
pattern = GIMP_PATTERN (viewable);
copy_width = MIN (width, pattern->mask->width);
copy_height = MIN (height, pattern->mask->height);
x = (copy_width == width) ? 0 : (width - copy_width) / 2;
y = (copy_height == height) ? 0 : (height - copy_height) / 2;
temp_buf = temp_buf_new (width, height,
pattern->mask->bytes,
0, 0,
white);
temp_buf_copy_area (pattern->mask, temp_buf,
0, 0,
copy_width, copy_height,
x, y);
return temp_buf;
}
static gchar *
gimp_pattern_get_extension (GimpData *data)
{
return GIMP_PATTERN_FILE_EXTENSION;
}
static GimpData *
gimp_pattern_duplicate (GimpData *data)
{
GimpPattern *pattern;
pattern = GIMP_PATTERN (gtk_type_new (GIMP_TYPE_PATTERN));
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)
{
GimpPattern *pattern;
guchar *data;
gint row, col;
g_return_val_if_fail (name != NULL, NULL);
pattern = GIMP_PATTERN (gtk_type_new (GIMP_TYPE_PATTERN));
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 (gtk_type_new (GIMP_TYPE_PATTERN));
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 */
gtk_object_ref (GTK_OBJECT (standard_pattern));
gtk_object_ref (GTK_OBJECT (standard_pattern));
gtk_object_sink (GTK_OBJECT (standard_pattern));
}
return GIMP_DATA (standard_pattern);
}
GimpData *
gimp_pattern_load (const gchar *filename)
{
GimpPattern *pattern = NULL;
gint fd;
PatternHeader header;
gint bn_size;
gchar *name = NULL;
g_return_val_if_fail (filename != NULL, NULL);
fd = open (filename, O_RDONLY | _O_BINARY);
if (fd == -1)
return NULL;
/* Read in the header size */
if (read (fd, &header, sizeof (header)) != sizeof (header))
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_message (_("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_message ("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_message (_("Error in GIMP pattern file \"%s\"."), filename);
goto error;
}
}
else
{
name = g_strdup (_("Unnamed"));
}
pattern = GIMP_PATTERN (gtk_type_new (GIMP_TYPE_PATTERN));
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_message (_("GIMP pattern file appears to be truncated: \"%s\"."),
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);
return GIMP_DATA (pattern);
error:
if (pattern)
gtk_object_unref (GTK_OBJECT (pattern));
else if (name)
g_free (name);
close (fd);
return NULL;
}
TempBuf *
gimp_pattern_get_mask (const GimpPattern *pattern)
{
g_return_val_if_fail (pattern != NULL, NULL);
g_return_val_if_fail (GIMP_IS_PATTERN (pattern), NULL);
return pattern->mask;
}
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