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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 <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <gegl.h>
#include <cairo.h>
#include "core-types.h"
#include "gegl/gimp-gegl-utils.h"
#include "gimpdrawable.h"
#include "gimpdrawable-private.h"
#include "gimpdrawable-shadow.h"
GeglBuffer *
gimp_drawable_get_shadow_buffer (GimpDrawable *drawable)
{
GimpItem *item;
gint width;
gint height;
const Babl *format;
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), NULL);
item = GIMP_ITEM (drawable);
width = gimp_item_get_width (item);
height = gimp_item_get_height (item);
format = gimp_drawable_get_format (drawable);
if (drawable->private->shadow)
{
if ((width != gegl_buffer_get_width (drawable->private->shadow)) ||
(height != gegl_buffer_get_height (drawable->private->shadow)) ||
(format != gegl_buffer_get_format (drawable->private->shadow)))
{
gimp_drawable_free_shadow_buffer (drawable);
}
else
{
return drawable->private->shadow;
}
}
drawable->private->shadow = gegl_buffer_new (GEGL_RECTANGLE (0, 0,
width, height),
format);
return drawable->private->shadow;
}
void
gimp_drawable_free_shadow_buffer (GimpDrawable *drawable)
{
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
g_clear_object (&drawable->private->shadow);
}
void
gimp_drawable_merge_shadow_buffer (GimpDrawable *drawable,
gboolean push_undo,
const gchar *undo_desc)
{
gint x, y;
gint width, height;
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
g_return_if_fail (gimp_item_is_attached (GIMP_ITEM (drawable)));
g_return_if_fail (GEGL_IS_BUFFER (drawable->private->shadow));
/* A useful optimization here is to limit the update to the
* extents of the selection mask, as it cannot extend beyond
* them.
*/
if (gimp_item_mask_intersect (GIMP_ITEM (drawable), &x, &y, &width, &height))
{
GeglBuffer *buffer = g_object_ref (drawable->private->shadow);
gimp_drawable_apply_buffer (drawable, buffer,
GEGL_RECTANGLE (x, y, width, height),
push_undo, undo_desc,
GIMP_OPACITY_OPAQUE,
GIMP_LAYER_MODE_REPLACE,
GIMP_LAYER_COLOR_SPACE_AUTO,
GIMP_LAYER_COLOR_SPACE_AUTO,
GIMP_LAYER_COMPOSITE_AUTO,
NULL, x, y);
g_object_unref (buffer);
}
}
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