mirror of https://github.com/GNOME/gimp.git
346 lines
10 KiB
C
346 lines
10 KiB
C
/* GIMP - The GNU Image Manipulation Program
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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 "libgimpbase/gimpbase.h"
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#include "core-types.h"
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#include "gimpboundary.h"
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#include "gimpdrawable-filters.h"
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#include "gimpdrawable-floating-selection.h"
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#include "gimperror.h"
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#include "gimpimage.h"
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#include "gimpimage-undo.h"
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#include "gimpimage-undo-push.h"
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#include "gimplayer.h"
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#include "gimplayer-floating-selection.h"
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#include "gimplayermask.h"
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#include "gimpselection.h"
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#include "gimp-intl.h"
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/* public functions */
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void
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floating_sel_attach (GimpLayer *layer,
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GimpDrawable *drawable)
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{
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GimpImage *image;
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GimpLayer *floating_sel;
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GimpLayer *parent = NULL;
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gint position = 0;
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g_return_if_fail (GIMP_IS_LAYER (layer));
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g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
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g_return_if_fail (gimp_item_is_attached (GIMP_ITEM (drawable)));
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g_return_if_fail (drawable != GIMP_DRAWABLE (layer));
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g_return_if_fail (gimp_item_get_image (GIMP_ITEM (layer)) ==
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gimp_item_get_image (GIMP_ITEM (drawable)));
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image = gimp_item_get_image (GIMP_ITEM (drawable));
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floating_sel = gimp_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 == (GimpDrawable *) floating_sel)
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{
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GList *drawables = gimp_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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gimp_layer_set_lock_alpha (layer, TRUE, FALSE);
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gimp_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 (GIMP_IS_LAYER_MASK (drawable))
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{
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GimpLayer *tmp = gimp_layer_mask_get_layer (GIMP_LAYER_MASK (drawable));
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parent = GIMP_LAYER (gimp_item_get_parent (GIMP_ITEM (tmp)));
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position = gimp_item_get_index (GIMP_ITEM (tmp));
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}
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else if (GIMP_IS_LAYER (drawable))
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{
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parent = GIMP_LAYER (gimp_item_get_parent (GIMP_ITEM (drawable)));
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position = gimp_item_get_index (GIMP_ITEM (drawable));
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}
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gimp_image_add_layer (image, layer, parent, position, TRUE);
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}
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void
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floating_sel_anchor (GimpLayer *layer)
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{
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GimpImage *image;
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GimpDrawable *drawable;
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GimpFilter *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 (GIMP_IS_LAYER (layer));
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g_return_if_fail (gimp_layer_is_floating_sel (layer));
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/* Don't let gimp_image_remove_layer free the layer while we still need it */
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g_object_ref (layer);
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image = gimp_item_get_image (GIMP_ITEM (layer));
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gimp_image_undo_group_start (image, GIMP_UNDO_GROUP_FS_ANCHOR,
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C_("undo-type", "Anchor Floating Selection"));
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drawable = gimp_layer_get_floating_sel_drawable (layer);
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gimp_item_get_offset (GIMP_ITEM (layer), &off_x, &off_y);
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gimp_item_get_offset (GIMP_ITEM (drawable), &dr_off_x, &dr_off_y);
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bounding_box = gimp_drawable_get_bounding_box (GIMP_DRAWABLE (layer));
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dr_bounding_box = gimp_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 (gimp_item_get_visible (GIMP_ITEM (layer)) &&
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gegl_rectangle_intersect (NULL, &bounding_box, &dr_bounding_box))
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{
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filter = gimp_drawable_get_floating_sel_filter (drawable);
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}
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if (filter)
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{
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gimp_drawable_merge_filter (drawable, filter, NULL, NULL,
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NULL, FALSE, FALSE, FALSE);
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}
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gimp_image_remove_layer (image, layer, TRUE, NULL);
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gimp_image_undo_group_end (image);
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/* invalidate the boundaries */
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gimp_drawable_invalidate_boundary (GIMP_DRAWABLE (gimp_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 (GimpLayer *layer,
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GError **error)
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{
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GimpItem *item;
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GimpImage *image;
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g_return_val_if_fail (GIMP_IS_LAYER (layer), FALSE);
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g_return_val_if_fail (gimp_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 = GIMP_ITEM (layer);
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image = gimp_item_get_image (item);
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/* Check if the floating layer belongs to a channel */
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if (GIMP_IS_CHANNEL (gimp_layer_get_floating_sel_drawable (layer)))
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{
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g_set_error_literal (error, GIMP_ERROR, GIMP_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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gimp_image_undo_group_start (image, GIMP_UNDO_GROUP_FS_TO_LAYER,
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C_("undo-type", "Floating Selection to Layer"));
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gimp_image_undo_push_fs_to_layer (image, NULL, layer);
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gimp_drawable_detach_floating_sel (gimp_layer_get_floating_sel_drawable (layer));
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gimp_layer_set_floating_sel_drawable (layer, NULL);
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gimp_item_set_visible (item, TRUE, TRUE);
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gimp_layer_set_lock_alpha (layer, FALSE, TRUE);
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gimp_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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gimp_object_name_changed (GIMP_OBJECT (layer));
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gimp_drawable_update (GIMP_DRAWABLE (layer),
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0, 0,
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gimp_item_get_width (item),
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gimp_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 (GimpLayer *layer)
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{
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GimpImage *image;
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GimpDrawable *drawable;
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GList *selected_drawables = NULL;
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g_return_if_fail (GIMP_IS_LAYER (layer));
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g_return_if_fail (gimp_layer_is_floating_sel (layer));
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image = gimp_item_get_image (GIMP_ITEM (layer));
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drawable = gimp_layer_get_floating_sel_drawable (layer);
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/* set the underlying drawable to active */
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if (GIMP_IS_LAYER_MASK (drawable))
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{
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GimpLayerMask *mask = GIMP_LAYER_MASK (drawable);
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selected_drawables = g_list_prepend (NULL, gimp_layer_mask_get_layer (mask));
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gimp_image_set_selected_layers (image, selected_drawables);
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}
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else if (GIMP_IS_CHANNEL (drawable) && ! GIMP_IS_SELECTION (drawable))
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{
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selected_drawables = g_list_prepend (NULL, drawable);
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gimp_image_set_selected_channels (image, selected_drawables);
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}
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else if (! GIMP_IS_SELECTION (drawable))
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{
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selected_drawables = g_list_prepend (NULL, drawable);
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gimp_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 GimpBoundSeg *
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floating_sel_boundary (GimpLayer *layer,
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gint *n_segs)
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{
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g_return_val_if_fail (GIMP_IS_LAYER (layer), NULL);
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g_return_val_if_fail (gimp_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 = gimp_item_get_width (GIMP_ITEM (layer));
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height = gimp_item_get_height (GIMP_ITEM (layer));
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gimp_item_get_offset (GIMP_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 (gimp_drawable_has_alpha (GIMP_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 = gimp_drawable_get_buffer (GIMP_DRAWABLE (layer));
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layer->fs.segs = gimp_boundary_find (buffer, NULL,
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babl_format ("A float"),
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GIMP_BOUNDARY_WITHIN_BOUNDS,
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0, 0, width, height,
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GIMP_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 (GimpBoundSeg, 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 (GimpLayer *layer)
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{
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g_return_if_fail (GIMP_IS_LAYER (layer));
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g_return_if_fail (gimp_layer_is_floating_sel (layer));
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/* Invalidate the attached-to drawable's preview */
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gimp_viewable_invalidate_preview (GIMP_VIEWABLE (gimp_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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