gimp/app/core/gimpdrawable-shadow.c

109 lines
3.3 KiB
C

/* 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 <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gegl.h>
#include "core-types.h"
#include "base/pixel-region.h"
#include "base/tile-manager.h"
#include "gimpdrawable.h"
#include "gimpdrawable-private.h"
#include "gimpdrawable-shadow.h"
TileManager *
gimp_drawable_get_shadow_tiles (GimpDrawable *drawable)
{
GimpItem *item;
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), NULL);
item = GIMP_ITEM (drawable);
if (drawable->private->shadow)
{
gint width = gimp_item_get_width (item);
gint height = gimp_item_get_height (item);
gint bytes = gimp_drawable_bytes (drawable);
if ((width != tile_manager_width (drawable->private->shadow)) ||
(height != tile_manager_height (drawable->private->shadow)) ||
(bytes != tile_manager_bpp (drawable->private->shadow)))
{
gimp_drawable_free_shadow_tiles (drawable);
}
else
{
return drawable->private->shadow;
}
}
drawable->private->shadow = tile_manager_new (gimp_item_get_width (item),
gimp_item_get_height (item),
gimp_drawable_bytes (drawable));
return drawable->private->shadow;
}
void
gimp_drawable_free_shadow_tiles (GimpDrawable *drawable)
{
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
if (drawable->private->shadow)
{
tile_manager_unref (drawable->private->shadow);
drawable->private->shadow = NULL;
}
}
void
gimp_drawable_merge_shadow_tiles (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 (drawable->private->shadow != NULL);
/* 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))
{
TileManager *tiles = tile_manager_ref (drawable->private->shadow);
PixelRegion shadowPR;
pixel_region_init (&shadowPR, tiles, x, y, width, height, FALSE);
gimp_drawable_apply_region (drawable, &shadowPR,
push_undo, undo_desc,
GIMP_OPACITY_OPAQUE, GIMP_REPLACE_MODE,
NULL, NULL, x, y);
tile_manager_unref (tiles);
}
}