mirror of https://github.com/GNOME/gimp.git
351 lines
11 KiB
C
351 lines
11 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 <http://www.gnu.org/licenses/>.
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*/
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#include "config.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 "base/boundary.h"
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#include "base/pixel-region.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-sel.h"
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#include "gimplayermask.h"
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#include "gimp-intl.h"
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/* local function prototypes */
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static void floating_sel_composite (GimpLayer *layer);
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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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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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drawable = gimp_image_get_active_drawable (image);
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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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gimp_image_add_layer (image, layer, NULL, 0, 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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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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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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/* Composite the floating selection contents */
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floating_sel_composite (layer);
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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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}
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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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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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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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gimp_image_set_active_layer (image, gimp_layer_mask_get_layer (mask));
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}
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else if (GIMP_IS_CHANNEL (drawable))
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{
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gimp_image_set_active_channel (image, GIMP_CHANNEL (drawable));
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}
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else
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{
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gimp_image_set_active_layer (image, GIMP_LAYER (drawable));
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}
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}
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const BoundSeg *
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floating_sel_boundary (GimpLayer *layer,
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gint *n_segs)
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{
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PixelRegion bPR;
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gint i;
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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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/* find the segments */
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pixel_region_init (&bPR,
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gimp_drawable_get_tiles (GIMP_DRAWABLE (layer)),
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0, 0, width, height, FALSE);
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layer->fs.segs = boundary_find (&bPR, BOUNDARY_WITHIN_BOUNDS,
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0, 0, width, height,
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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 (BoundSeg, 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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/* private functions */
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static void
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floating_sel_composite (GimpLayer *layer)
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{
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GimpDrawable *drawable;
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gint off_x, off_y;
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gint dr_off_x, dr_off_y;
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gint combine_x, combine_y;
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gint combine_width, combine_height;
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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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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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if (gimp_item_get_visible (GIMP_ITEM (layer)) &&
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gimp_rectangle_intersect (off_x, off_y,
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gimp_item_get_width (GIMP_ITEM (layer)),
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gimp_item_get_height (GIMP_ITEM (layer)),
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dr_off_x, dr_off_y,
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gimp_item_get_width (GIMP_ITEM (drawable)),
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gimp_item_get_height (GIMP_ITEM (drawable)),
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&combine_x, &combine_y,
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&combine_width, &combine_height))
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{
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PixelRegion fsPR;
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gboolean lock_alpha = FALSE;
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/* composite the area from the layer to the drawable */
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pixel_region_init (&fsPR,
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gimp_drawable_get_tiles (GIMP_DRAWABLE (layer)),
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combine_x - off_x,
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combine_y - off_y,
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combine_width, combine_height,
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FALSE);
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/* a kludge here to prevent the case of the drawable
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* underneath having lock alpha on, and disallowing
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* the composited floating selection from being shown
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*/
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if (GIMP_IS_LAYER (drawable))
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{
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lock_alpha = gimp_layer_get_lock_alpha (GIMP_LAYER (drawable));
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if (lock_alpha)
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gimp_layer_set_lock_alpha (GIMP_LAYER (drawable), FALSE, FALSE);
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}
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gimp_drawable_apply_region (drawable, &fsPR,
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TRUE, NULL,
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gimp_layer_get_opacity (layer),
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gimp_layer_get_mode (layer),
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NULL, NULL,
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combine_x - dr_off_x,
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combine_y - dr_off_y);
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/* restore lock alpha */
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if (lock_alpha)
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gimp_layer_set_lock_alpha (GIMP_LAYER (drawable), TRUE, FALSE);
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}
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}
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