349 lines
11 KiB
C
349 lines
11 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 "libpikabase/pikabase.h"
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#include "core-types.h"
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#include "pikaboundary.h"
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#include "pikadrawable-filters.h"
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#include "pikadrawable-floating-selection.h"
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#include "pikaerror.h"
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#include "pikaimage.h"
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#include "pikaimage-undo.h"
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#include "pikaimage-undo-push.h"
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#include "pikalayer.h"
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#include "pikalayer-floating-selection.h"
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#include "pikalayermask.h"
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#include "pika-intl.h"
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/* public functions */
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void
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floating_sel_attach (PikaLayer *layer,
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PikaDrawable *drawable)
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{
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PikaImage *image;
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PikaLayer *floating_sel;
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PikaLayer *parent = NULL;
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gint position = 0;
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g_return_if_fail (PIKA_IS_LAYER (layer));
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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 (drawable != PIKA_DRAWABLE (layer));
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g_return_if_fail (pika_item_get_image (PIKA_ITEM (layer)) ==
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pika_item_get_image (PIKA_ITEM (drawable)));
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image = pika_item_get_image (PIKA_ITEM (drawable));
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floating_sel = pika_image_get_floating_selection (image);
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/* If there is already a floating selection, anchor it */
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if (floating_sel)
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{
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floating_sel_anchor (floating_sel);
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/* if we were pasting to the old floating selection, paste now
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* to the drawable
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*/
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if (drawable == (PikaDrawable *) floating_sel)
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{
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GList *drawables = pika_image_get_selected_drawables (image);
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g_return_if_fail (g_list_length (drawables) == 1);
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drawable = drawables->data;
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g_list_free (drawables);
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}
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}
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pika_layer_set_lock_alpha (layer, TRUE, FALSE);
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pika_layer_set_floating_sel_drawable (layer, drawable);
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/* Floating selection layer placement, default to the top of the
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* layers stack; parent and position are adapted according to the
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* drawable associated with the floating selection.
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*/
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if (PIKA_IS_LAYER_MASK (drawable))
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{
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PikaLayer *tmp = pika_layer_mask_get_layer (PIKA_LAYER_MASK (drawable));
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parent = PIKA_LAYER (pika_item_get_parent (PIKA_ITEM (tmp)));
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position = pika_item_get_index (PIKA_ITEM (tmp));
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}
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else if (PIKA_IS_LAYER (drawable))
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{
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parent = PIKA_LAYER (pika_item_get_parent (PIKA_ITEM (drawable)));
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position = pika_item_get_index (PIKA_ITEM (drawable));
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}
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pika_image_add_layer (image, layer, parent, position, TRUE);
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}
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void
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floating_sel_anchor (PikaLayer *layer)
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{
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PikaImage *image;
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PikaDrawable *drawable;
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PikaFilter *filter = NULL;
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GeglRectangle bounding_box;
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GeglRectangle dr_bounding_box;
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gint off_x, off_y;
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gint dr_off_x, dr_off_y;
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g_return_if_fail (PIKA_IS_LAYER (layer));
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g_return_if_fail (pika_layer_is_floating_sel (layer));
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/* Don't let pika_image_remove_layer free the layer while we still need it */
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g_object_ref (layer);
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image = pika_item_get_image (PIKA_ITEM (layer));
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pika_image_undo_group_start (image, PIKA_UNDO_GROUP_FS_ANCHOR,
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C_("undo-type", "Anchor Floating Selection"));
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drawable = pika_layer_get_floating_sel_drawable (layer);
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pika_item_get_offset (PIKA_ITEM (layer), &off_x, &off_y);
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pika_item_get_offset (PIKA_ITEM (drawable), &dr_off_x, &dr_off_y);
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bounding_box = pika_drawable_get_bounding_box (PIKA_DRAWABLE (layer));
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dr_bounding_box = pika_drawable_get_bounding_box (drawable);
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bounding_box.x += off_x;
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bounding_box.y += off_y;
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dr_bounding_box.x += dr_off_x;
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dr_bounding_box.y += dr_off_y;
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if (pika_item_get_visible (PIKA_ITEM (layer)) &&
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gegl_rectangle_intersect (NULL, &bounding_box, &dr_bounding_box))
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{
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filter = pika_drawable_get_floating_sel_filter (drawable);
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}
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if (filter)
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{
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pika_drawable_merge_filter (drawable, filter, NULL, NULL,
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NULL, FALSE, FALSE, FALSE);
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}
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pika_image_remove_layer (image, layer, TRUE, NULL);
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pika_image_undo_group_end (image);
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/* invalidate the boundaries */
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pika_drawable_invalidate_boundary (PIKA_DRAWABLE (pika_image_get_mask (image)));
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g_object_unref (layer);
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}
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gboolean
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floating_sel_to_layer (PikaLayer *layer,
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GError **error)
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{
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PikaItem *item;
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PikaImage *image;
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g_return_val_if_fail (PIKA_IS_LAYER (layer), FALSE);
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g_return_val_if_fail (pika_layer_is_floating_sel (layer), FALSE);
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g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
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item = PIKA_ITEM (layer);
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image = pika_item_get_image (item);
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/* Check if the floating layer belongs to a channel */
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if (PIKA_IS_CHANNEL (pika_layer_get_floating_sel_drawable (layer)))
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{
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g_set_error_literal (error, PIKA_ERROR, PIKA_FAILED,
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_("Cannot create a new layer from the floating "
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"selection because it belongs to a layer mask "
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"or channel."));
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return FALSE;
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}
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pika_image_undo_group_start (image, PIKA_UNDO_GROUP_FS_TO_LAYER,
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C_("undo-type", "Floating Selection to Layer"));
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pika_image_undo_push_fs_to_layer (image, NULL, layer);
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pika_drawable_detach_floating_sel (pika_layer_get_floating_sel_drawable (layer));
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pika_layer_set_floating_sel_drawable (layer, NULL);
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pika_item_set_visible (item, TRUE, TRUE);
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pika_layer_set_lock_alpha (layer, FALSE, TRUE);
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pika_image_undo_group_end (image);
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/* When the floating selection is converted to/from a normal layer
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* it does something resembling a name change, so emit the
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* "name-changed" signal
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*/
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pika_object_name_changed (PIKA_OBJECT (layer));
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pika_drawable_update (PIKA_DRAWABLE (layer),
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0, 0,
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pika_item_get_width (item),
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pika_item_get_height (item));
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return TRUE;
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}
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void
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floating_sel_activate_drawable (PikaLayer *layer)
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{
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PikaImage *image;
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PikaDrawable *drawable;
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GList *selected_drawables;
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g_return_if_fail (PIKA_IS_LAYER (layer));
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g_return_if_fail (pika_layer_is_floating_sel (layer));
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image = pika_item_get_image (PIKA_ITEM (layer));
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drawable = pika_layer_get_floating_sel_drawable (layer);
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/* set the underlying drawable to active */
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if (PIKA_IS_LAYER_MASK (drawable))
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{
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PikaLayerMask *mask = PIKA_LAYER_MASK (drawable);
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selected_drawables = g_list_prepend (NULL, pika_layer_mask_get_layer (mask));
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pika_image_set_selected_layers (image, selected_drawables);
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}
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else if (PIKA_IS_CHANNEL (drawable))
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{
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selected_drawables = g_list_prepend (NULL, drawable);
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pika_image_set_selected_channels (image, selected_drawables);
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}
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else
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{
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selected_drawables = g_list_prepend (NULL, drawable);
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pika_image_set_selected_layers (image, selected_drawables);
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}
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g_list_free (selected_drawables);
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}
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const PikaBoundSeg *
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floating_sel_boundary (PikaLayer *layer,
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gint *n_segs)
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{
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g_return_val_if_fail (PIKA_IS_LAYER (layer), NULL);
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g_return_val_if_fail (pika_layer_is_floating_sel (layer), NULL);
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g_return_val_if_fail (n_segs != NULL, NULL);
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if (layer->fs.boundary_known == FALSE)
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{
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gint width, height;
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gint off_x, off_y;
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width = pika_item_get_width (PIKA_ITEM (layer));
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height = pika_item_get_height (PIKA_ITEM (layer));
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pika_item_get_offset (PIKA_ITEM (layer), &off_x, &off_y);
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if (layer->fs.segs)
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g_free (layer->fs.segs);
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if (pika_drawable_has_alpha (PIKA_DRAWABLE (layer)))
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{
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GeglBuffer *buffer;
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gint i;
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/* find the segments */
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buffer = pika_drawable_get_buffer (PIKA_DRAWABLE (layer));
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layer->fs.segs = pika_boundary_find (buffer, NULL,
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babl_format ("A float"),
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PIKA_BOUNDARY_WITHIN_BOUNDS,
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0, 0, width, height,
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PIKA_BOUNDARY_HALF_WAY,
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&layer->fs.num_segs);
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/* offset the segments */
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for (i = 0; i < layer->fs.num_segs; i++)
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{
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layer->fs.segs[i].x1 += off_x;
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layer->fs.segs[i].y1 += off_y;
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layer->fs.segs[i].x2 += off_x;
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layer->fs.segs[i].y2 += off_y;
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}
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}
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else
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{
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layer->fs.num_segs = 4;
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layer->fs.segs = g_new0 (PikaBoundSeg, 4);
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/* top */
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layer->fs.segs[0].x1 = off_x;
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layer->fs.segs[0].y1 = off_y;
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layer->fs.segs[0].x2 = off_x + width;
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layer->fs.segs[0].y2 = off_y;
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/* left */
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layer->fs.segs[1].x1 = off_x;
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layer->fs.segs[1].y1 = off_y;
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layer->fs.segs[1].x2 = off_x;
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layer->fs.segs[1].y2 = off_y + height;
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/* right */
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layer->fs.segs[2].x1 = off_x + width;
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layer->fs.segs[2].y1 = off_y;
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layer->fs.segs[2].x2 = off_x + width;
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layer->fs.segs[2].y2 = off_y + height;
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/* bottom */
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layer->fs.segs[3].x1 = off_x;
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layer->fs.segs[3].y1 = off_y + height;
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layer->fs.segs[3].x2 = off_x + width;
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layer->fs.segs[3].y2 = off_y + height;
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}
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layer->fs.boundary_known = TRUE;
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}
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*n_segs = layer->fs.num_segs;
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return layer->fs.segs;
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}
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void
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floating_sel_invalidate (PikaLayer *layer)
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{
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g_return_if_fail (PIKA_IS_LAYER (layer));
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g_return_if_fail (pika_layer_is_floating_sel (layer));
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/* Invalidate the attached-to drawable's preview */
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pika_viewable_invalidate_preview (PIKA_VIEWABLE (pika_layer_get_floating_sel_drawable (layer)));
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/* Invalidate the boundary */
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layer->fs.boundary_known = FALSE;
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}
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