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gimp/app/core/gimpbrush-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 <sys/types.h>
#include <sys/stat.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <fcntl.h>
#ifdef G_OS_WIN32
#include <io.h>
#endif
#ifndef _O_BINARY
#define _O_BINARY 0
#endif
#include <gtk/gtk.h>
#include <stdio.h>
#include "apptypes.h"
#include "libgimp/gimpvector.h"
#include "brush_header.h"
#include "pattern_header.h"
#include "gimpbrush.h"
#include "gimpbrushlist.h"
#include "gimpsignal.h"
#include "gimprc.h"
#include "paint_core.h"
#include "temp_buf.h"
#include "libgimp/gimpintl.h"
enum
{
DIRTY,
RENAME,
LAST_SIGNAL
};
static GimpBrush * gimp_brush_select_brush (PaintCore *paint_core);
static gboolean gimp_brush_want_null_motion (PaintCore *paint_core);
static guint gimp_brush_signals[LAST_SIGNAL];
static GimpObjectClass *parent_class;
static void
gimp_brush_destroy (GtkObject *object)
{
GimpBrush *brush = GIMP_BRUSH (object);
g_free (brush->filename);
g_free (brush->name);
if (brush->mask)
temp_buf_free (brush->mask);
if (GTK_OBJECT_CLASS (parent_class)->destroy)
GTK_OBJECT_CLASS (parent_class)->destroy (object);
}
static void
gimp_brush_class_init (GimpBrushClass *klass)
{
GtkObjectClass *object_class;
GtkType type;
object_class = GTK_OBJECT_CLASS (klass);
parent_class = gtk_type_class (gimp_object_get_type ());
type = object_class->type;
object_class->destroy = gimp_brush_destroy;
klass->select_brush = gimp_brush_select_brush;
klass->want_null_motion = gimp_brush_want_null_motion;
gimp_brush_signals[DIRTY] =
gimp_signal_new ("dirty", GTK_RUN_FIRST, type, 0, gimp_sigtype_void);
gimp_brush_signals[RENAME] =
gimp_signal_new ("rename", GTK_RUN_FIRST, type, 0, gimp_sigtype_void);
gtk_object_class_add_signals (object_class, gimp_brush_signals, LAST_SIGNAL);
}
void
gimp_brush_init (GimpBrush *brush)
{
brush->filename = NULL;
brush->name = NULL;
brush->spacing = 20;
brush->x_axis.x = 15.0;
brush->x_axis.y = 0.0;
brush->y_axis.x = 0.0;
brush->y_axis.y = 15.0;
brush->mask = NULL;
brush->pixmap = NULL;
}
GtkType
gimp_brush_get_type (void)
{
static GtkType type = 0;
if (!type)
{
static const GtkTypeInfo info =
{
"GimpBrush",
sizeof (GimpBrush),
sizeof (GimpBrushClass),
(GtkClassInitFunc) gimp_brush_class_init,
(GtkObjectInitFunc) gimp_brush_init,
/* reserved_1 */ NULL,
/* reserved_2 */ NULL,
(GtkClassInitFunc) NULL
};
type = gtk_type_unique (gimp_object_get_type (), &info);
}
return type;
}
GimpBrush *
gimp_brush_load (gchar *filename)
{
GimpBrush *brush;
gint fd;
g_return_val_if_fail (filename != NULL, NULL);
fd = open (filename, O_RDONLY | _O_BINARY);
if (fd == -1)
return NULL;
brush = gimp_brush_load_brush (fd, filename);
close (fd);
brush->filename = g_strdup (filename);
/* Swap the brush to disk (if we're being stingy with memory) */
if (stingy_memory_use)
{
temp_buf_swap (brush->mask);
if (brush->pixmap)
temp_buf_swap (brush->pixmap);
}
return brush;
}
static GimpBrush *
gimp_brush_select_brush (PaintCore *paint_core)
{
return paint_core->brush;
}
static gboolean
gimp_brush_want_null_motion (PaintCore *paint_core)
{
return TRUE;
}
TempBuf *
gimp_brush_get_mask (GimpBrush *brush)
{
g_return_val_if_fail (brush != NULL, NULL);
g_return_val_if_fail (GIMP_IS_BRUSH (brush), NULL);
return brush->mask;
}
TempBuf *
gimp_brush_get_pixmap (GimpBrush *brush)
{
g_return_val_if_fail (brush != NULL, NULL);
g_return_val_if_fail (GIMP_IS_BRUSH (brush), NULL);
return brush->pixmap;
}
gchar *
gimp_brush_get_name (GimpBrush *brush)
{
g_return_val_if_fail (brush != NULL, NULL);
g_return_val_if_fail (GIMP_IS_BRUSH (brush), NULL);
return brush->name;
}
void
gimp_brush_set_name (GimpBrush *brush,
gchar *name)
{
g_return_if_fail (brush != NULL);
g_return_if_fail (GIMP_IS_BRUSH (brush));
if (strcmp (brush->name, name) == 0)
return;
if (brush->name)
g_free (brush->name);
brush->name = g_strdup (name);
gtk_signal_emit (GTK_OBJECT (brush), gimp_brush_signals[RENAME]);
}
gint
gimp_brush_get_spacing (GimpBrush *brush)
{
g_return_val_if_fail (brush != NULL, 0);
g_return_val_if_fail (GIMP_IS_BRUSH (brush), 0);
return brush->spacing;
}
void
gimp_brush_set_spacing (GimpBrush *brush,
gint spacing)
{
g_return_if_fail (brush != NULL);
g_return_if_fail (GIMP_IS_BRUSH (brush));
brush->spacing = spacing;
}
GimpBrush *
gimp_brush_load_brush (gint fd,
gchar *filename)
{
GimpBrush *brush;
GPattern *pattern;
gint bn_size;
BrushHeader header;
gchar *name;
gint i;
g_return_val_if_fail (filename != NULL, NULL);
g_return_val_if_fail (fd != -1, NULL);
/* Read in the header size */
if (read (fd, &header, sizeof (header)) != sizeof (header))
return NULL;
/* 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);
header.spacing = g_ntohl (header.spacing);
/* Check for correct file format */
/* It looks as if version 1 did not have the same magic number. (neo) */
if (header.version != 1 &&
(header.magic_number != GBRUSH_MAGIC || header.version != 2))
{
g_message (_("Unknown brush format version #%d in \"%s\"."),
header.version, filename);
return NULL;
}
if (header.version == 1)
{
/* If this is a version 1 brush, set the fp back 8 bytes */
lseek (fd, -8, SEEK_CUR);
header.header_size += 8;
/* spacing is not defined in version 1 */
header.spacing = 25;
}
/* Read in the brush 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 brush file \"%s\"."), filename);
g_free (name);
return NULL;
}
}
else
{
name = g_strdup (_("Unnamed"));
}
switch (header.bytes)
{
case 1:
brush = GIMP_BRUSH (gtk_type_new (gimp_brush_get_type ()));
brush->mask = temp_buf_new (header.width, header.height, 1,
0, 0, NULL);
if (read (fd,
temp_buf_data (brush->mask), header.width * header.height) <
header.width * header.height)
{
g_message (_("GIMP brush file appears to be truncated: \"%s\"."),
filename);
g_free (name);
gtk_object_unref (GTK_OBJECT (brush));
return NULL;
}
/* For backwards-compatibility, check if a pattern follows.
The obsolete .gpb format did it this way. */
pattern = pattern_load (fd, filename);
if (pattern)
{
if (pattern->mask && pattern->mask->bytes == 3)
{
brush->pixmap = pattern->mask;
pattern->mask = NULL;
}
pattern_free (pattern);
}
else
{
/* rewind to make brush pipe loader happy */
if (lseek (fd, - sizeof (PatternHeader), SEEK_CUR) < 0)
{
g_message (_("GIMP brush file appears to be corrupted: \"%s\"."),
filename);
g_free (name);
gtk_object_unref (GTK_OBJECT (brush));
return NULL;
}
}
break;
case 4:
brush = GIMP_BRUSH (gtk_type_new (gimp_brush_get_type ()));
brush->mask = temp_buf_new (header.width, header.height, 1, 0, 0, NULL);
brush->pixmap = temp_buf_new (header.width, header.height, 3, 0, 0, NULL);
for (i = 0; i < header.width * header.height; i++)
{
if (read (fd, temp_buf_data (brush->pixmap)
+ i * 3, 3) != 3 ||
read (fd, temp_buf_data (brush->mask) + i, 1) != 1)
{
g_message (_("GIMP brush file appears to be truncated: \"%s\"."),
filename);
g_free (name);
gtk_object_unref (GTK_OBJECT (brush));
return NULL;
}
}
break;
default:
g_message ("Unsupported brush depth: %d\n in file \"%s\"\nGIMP Brushes must be GRAY or RGBA\n",
header.bytes, filename);
g_free (name);
return NULL;
}
brush->name = name;
brush->spacing = header.spacing;
brush->x_axis.x = header.width / 2.0;
brush->x_axis.y = 0.0;
brush->y_axis.x = 0.0;
brush->y_axis.y = header.height / 2.0;
return brush;
}
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