gimp/app/gimpviewable.c

204 lines
5.0 KiB
C

/* The GIMP -- an image manipulation program
* Copyright (C) 1995-1997 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 <gtk/gtk.h>
#include "apptypes.h"
#include "gimpmarshal.h"
#include "gimpviewable.h"
#include "temp_buf.h"
enum
{
INVALIDATE_PREVIEW,
GET_PREVIEW,
GET_NEW_PREVIEW,
LAST_SIGNAL
};
static void gimp_viewable_class_init (GimpViewableClass *klass);
static void gimp_viewable_init (GimpViewable *viewable);
static guint viewable_signals[LAST_SIGNAL] = { 0 };
static GimpObjectClass *parent_class = NULL;
GtkType
gimp_viewable_get_type (void)
{
static GtkType viewable_type = 0;
if (! viewable_type)
{
GtkTypeInfo viewable_info =
{
"GimpViewable",
sizeof (GimpViewable),
sizeof (GimpViewableClass),
(GtkClassInitFunc) gimp_viewable_class_init,
(GtkObjectInitFunc) gimp_viewable_init,
/* reserved_1 */ NULL,
/* reserved_2 */ NULL,
(GtkClassInitFunc) NULL,
};
viewable_type = gtk_type_unique (GIMP_TYPE_OBJECT, &viewable_info);
}
return viewable_type;
}
static void
gimp_viewable_class_init (GimpViewableClass *klass)
{
GtkObjectClass *object_class;
object_class = (GtkObjectClass *) klass;
parent_class = gtk_type_class (GIMP_TYPE_OBJECT);
viewable_signals[INVALIDATE_PREVIEW] =
gtk_signal_new ("invalidate_preview",
GTK_RUN_FIRST,
object_class->type,
GTK_SIGNAL_OFFSET (GimpViewableClass,
invalidate_preview),
gtk_signal_default_marshaller,
GTK_TYPE_NONE, 0);
viewable_signals[GET_PREVIEW] =
gtk_signal_new ("get_preview",
GTK_RUN_LAST,
object_class->type,
GTK_SIGNAL_OFFSET (GimpViewableClass,
get_preview),
gimp_marshal_POINTER__INT_INT,
GTK_TYPE_POINTER, 3,
GTK_TYPE_POINTER,
GTK_TYPE_INT,
GTK_TYPE_INT);
viewable_signals[GET_NEW_PREVIEW] =
gtk_signal_new ("get_new_preview",
GTK_RUN_LAST,
object_class->type,
GTK_SIGNAL_OFFSET (GimpViewableClass,
get_new_preview),
gimp_marshal_POINTER__INT_INT,
GTK_TYPE_POINTER, 3,
GTK_TYPE_POINTER,
GTK_TYPE_INT,
GTK_TYPE_INT);
gtk_object_class_add_signals (object_class, viewable_signals, LAST_SIGNAL);
klass->invalidate_preview = NULL;
klass->get_preview = NULL;
klass->get_new_preview = NULL;
}
static void
gimp_viewable_init (GimpViewable *viewable)
{
}
void
gimp_viewable_invalidate_preview (GimpViewable *viewable)
{
g_return_if_fail (viewable);
g_return_if_fail (GIMP_IS_VIEWABLE (viewable));
gtk_signal_emit (GTK_OBJECT (viewable), viewable_signals[INVALIDATE_PREVIEW]);
}
TempBuf *
gimp_viewable_get_preview (GimpViewable *viewable,
gint width,
gint height)
{
TempBuf *temp_buf = NULL;
g_return_val_if_fail (viewable, NULL);
g_return_val_if_fail (GIMP_IS_VIEWABLE (viewable), NULL);
g_return_val_if_fail (width > 0, NULL);
g_return_val_if_fail (height > 0, NULL);
gtk_signal_emit (GTK_OBJECT (viewable), viewable_signals[GET_PREVIEW],
width, height, &temp_buf);
if (temp_buf)
return temp_buf;
temp_buf = gtk_object_get_data (GTK_OBJECT (viewable),
"static_viewable_preview");
if (temp_buf)
{
if (temp_buf->width == width &&
temp_buf->height == height)
return temp_buf;
temp_buf_free (temp_buf);
temp_buf = NULL;
}
gtk_signal_emit (GTK_OBJECT (viewable), viewable_signals[GET_NEW_PREVIEW],
width, height, &temp_buf);
gtk_object_set_data (GTK_OBJECT (viewable), "static_viewable_preview",
temp_buf);
return temp_buf;
}
TempBuf *
gimp_viewable_get_new_preview (GimpViewable *viewable,
gint width,
gint height)
{
TempBuf *temp_buf = NULL;
g_return_val_if_fail (viewable, NULL);
g_return_val_if_fail (GIMP_IS_VIEWABLE (viewable), NULL);
g_return_val_if_fail (width > 0, NULL);
g_return_val_if_fail (height > 0, NULL);
gtk_signal_emit (GTK_OBJECT (viewable), viewable_signals[GET_NEW_PREVIEW],
width, height, &temp_buf);
if (temp_buf)
return temp_buf;
gtk_signal_emit (GTK_OBJECT (viewable), viewable_signals[GET_PREVIEW],
width, height, &temp_buf);
if (temp_buf)
return temp_buf_copy (temp_buf, NULL);
return NULL;
}