115 lines
3.7 KiB
C
115 lines
3.7 KiB
C
/* PIKA - Photo and Image Kooker Application
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* a rebranding of The GNU Image Manipulation Program (created with heckimp)
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* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
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*
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* Original copyright, applying to most contents (license remains unchanged):
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <gdk-pixbuf/gdk-pixbuf.h>
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#include <gegl.h>
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#include <cairo.h>
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#include "core-types.h"
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#include "gegl/pika-gegl-utils.h"
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#include "pikadrawable.h"
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#include "pikadrawable-private.h"
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#include "pikadrawable-shadow.h"
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GeglBuffer *
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pika_drawable_get_shadow_buffer (PikaDrawable *drawable)
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{
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PikaItem *item;
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gint width;
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gint height;
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const Babl *format;
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g_return_val_if_fail (PIKA_IS_DRAWABLE (drawable), NULL);
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item = PIKA_ITEM (drawable);
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width = pika_item_get_width (item);
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height = pika_item_get_height (item);
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format = pika_drawable_get_format (drawable);
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if (drawable->private->shadow)
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{
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if ((width != gegl_buffer_get_width (drawable->private->shadow)) ||
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(height != gegl_buffer_get_height (drawable->private->shadow)) ||
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(format != gegl_buffer_get_format (drawable->private->shadow)))
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{
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pika_drawable_free_shadow_buffer (drawable);
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}
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else
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{
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return drawable->private->shadow;
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}
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}
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drawable->private->shadow = gegl_buffer_new (GEGL_RECTANGLE (0, 0,
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width, height),
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format);
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return drawable->private->shadow;
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}
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void
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pika_drawable_free_shadow_buffer (PikaDrawable *drawable)
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{
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g_return_if_fail (PIKA_IS_DRAWABLE (drawable));
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g_clear_object (&drawable->private->shadow);
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}
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void
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pika_drawable_merge_shadow_buffer (PikaDrawable *drawable,
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gboolean push_undo,
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const gchar *undo_desc)
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{
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gint x, y;
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gint width, height;
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g_return_if_fail (PIKA_IS_DRAWABLE (drawable));
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g_return_if_fail (pika_item_is_attached (PIKA_ITEM (drawable)));
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g_return_if_fail (GEGL_IS_BUFFER (drawable->private->shadow));
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/* A useful optimization here is to limit the update to the
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* extents of the selection mask, as it cannot extend beyond
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* them.
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*/
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if (pika_item_mask_intersect (PIKA_ITEM (drawable), &x, &y, &width, &height))
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{
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GeglBuffer *buffer = g_object_ref (drawable->private->shadow);
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pika_drawable_apply_buffer (drawable, buffer,
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GEGL_RECTANGLE (x, y, width, height),
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push_undo, undo_desc,
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PIKA_OPACITY_OPAQUE,
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PIKA_LAYER_MODE_REPLACE,
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PIKA_LAYER_COLOR_SPACE_AUTO,
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PIKA_LAYER_COLOR_SPACE_AUTO,
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PIKA_LAYER_COMPOSITE_AUTO,
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NULL, x, y);
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g_object_unref (buffer);
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}
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}
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