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-rw-r--r--app/core/gimplayer-floating-selection.c332
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diff --git a/app/core/gimplayer-floating-selection.c b/app/core/gimplayer-floating-selection.c
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+++ b/app/core/gimplayer-floating-selection.c
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+/* 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 <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gdk-pixbuf/gdk-pixbuf.h>
+#include <gegl.h>
+
+#include "libgimpbase/gimpbase.h"
+
+#include "core-types.h"
+
+#include "gimpboundary.h"
+#include "gimpdrawable-filters.h"
+#include "gimpdrawable-floating-selection.h"
+#include "gimperror.h"
+#include "gimpimage.h"
+#include "gimpimage-undo.h"
+#include "gimpimage-undo-push.h"
+#include "gimplayer.h"
+#include "gimplayer-floating-selection.h"
+#include "gimplayermask.h"
+
+#include "gimp-intl.h"
+
+
+/* public functions */
+
+void
+floating_sel_attach (GimpLayer *layer,
+ GimpDrawable *drawable)
+{
+ GimpImage *image;
+ GimpLayer *floating_sel;
+ GimpLayer *parent = NULL;
+ gint position = 0;
+
+ g_return_if_fail (GIMP_IS_LAYER (layer));
+ g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
+ g_return_if_fail (gimp_item_is_attached (GIMP_ITEM (drawable)));
+ g_return_if_fail (drawable != GIMP_DRAWABLE (layer));
+ g_return_if_fail (gimp_item_get_image (GIMP_ITEM (layer)) ==
+ gimp_item_get_image (GIMP_ITEM (drawable)));
+
+ image = gimp_item_get_image (GIMP_ITEM (drawable));
+
+ floating_sel = gimp_image_get_floating_selection (image);
+
+ /* If there is already a floating selection, anchor it */
+ if (floating_sel)
+ {
+ floating_sel_anchor (floating_sel);
+
+ /* if we were pasting to the old floating selection, paste now
+ * to the drawable
+ */
+ if (drawable == (GimpDrawable *) floating_sel)
+ drawable = gimp_image_get_active_drawable (image);
+ }
+
+ gimp_layer_set_lock_alpha (layer, TRUE, FALSE);
+
+ gimp_layer_set_floating_sel_drawable (layer, drawable);
+
+ /* Floating selection layer placement, default to the top of the
+ * layers stack; parent and position are adapted according to the
+ * drawable associated with the floating selection.
+ */
+
+ if (GIMP_IS_LAYER_MASK (drawable))
+ {
+ GimpLayer *tmp = gimp_layer_mask_get_layer (GIMP_LAYER_MASK (drawable));
+
+ parent = GIMP_LAYER (gimp_item_get_parent (GIMP_ITEM (tmp)));
+ position = gimp_item_get_index (GIMP_ITEM (tmp));
+ }
+ else if (GIMP_IS_LAYER (drawable))
+ {
+ parent = GIMP_LAYER (gimp_item_get_parent (GIMP_ITEM (drawable)));
+ position = gimp_item_get_index (GIMP_ITEM (drawable));
+ }
+
+ gimp_image_add_layer (image, layer, parent, position, TRUE);
+}
+
+void
+floating_sel_anchor (GimpLayer *layer)
+{
+ GimpImage *image;
+ GimpDrawable *drawable;
+ GimpFilter *filter = NULL;
+ GeglRectangle bounding_box;
+ GeglRectangle dr_bounding_box;
+ gint off_x, off_y;
+ gint dr_off_x, dr_off_y;
+
+ g_return_if_fail (GIMP_IS_LAYER (layer));
+ g_return_if_fail (gimp_layer_is_floating_sel (layer));
+
+ /* Don't let gimp_image_remove_layer free the layer while we still need it */
+ g_object_ref (layer);
+
+ image = gimp_item_get_image (GIMP_ITEM (layer));
+
+ gimp_image_undo_group_start (image, GIMP_UNDO_GROUP_FS_ANCHOR,
+ C_("undo-type", "Anchor Floating Selection"));
+
+ drawable = gimp_layer_get_floating_sel_drawable (layer);
+
+ gimp_item_get_offset (GIMP_ITEM (layer), &off_x, &off_y);
+ gimp_item_get_offset (GIMP_ITEM (drawable), &dr_off_x, &dr_off_y);
+
+ bounding_box = gimp_drawable_get_bounding_box (GIMP_DRAWABLE (layer));
+ dr_bounding_box = gimp_drawable_get_bounding_box (drawable);
+
+ bounding_box.x += off_x;
+ bounding_box.y += off_y;
+
+ dr_bounding_box.x += dr_off_x;
+ dr_bounding_box.y += dr_off_y;
+
+ if (gimp_item_get_visible (GIMP_ITEM (layer)) &&
+ gegl_rectangle_intersect (NULL, &bounding_box, &dr_bounding_box))
+ {
+ filter = gimp_drawable_get_floating_sel_filter (drawable);
+ }
+
+ if (filter)
+ {
+ gimp_drawable_merge_filter (drawable, filter, NULL, NULL,
+ NULL, FALSE, FALSE, FALSE);
+ }
+
+ gimp_image_remove_layer (image, layer, TRUE, NULL);
+
+ gimp_image_undo_group_end (image);
+
+ /* invalidate the boundaries */
+ gimp_drawable_invalidate_boundary (GIMP_DRAWABLE (gimp_image_get_mask (image)));
+
+ g_object_unref (layer);
+}
+
+gboolean
+floating_sel_to_layer (GimpLayer *layer,
+ GError **error)
+{
+ GimpItem *item;
+ GimpImage *image;
+
+ g_return_val_if_fail (GIMP_IS_LAYER (layer), FALSE);
+ g_return_val_if_fail (gimp_layer_is_floating_sel (layer), FALSE);
+ g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
+
+ item = GIMP_ITEM (layer);
+ image = gimp_item_get_image (item);
+
+ /* Check if the floating layer belongs to a channel */
+ if (GIMP_IS_CHANNEL (gimp_layer_get_floating_sel_drawable (layer)))
+ {
+ g_set_error_literal (error, GIMP_ERROR, GIMP_FAILED,
+ _("Cannot create a new layer from the floating "
+ "selection because it belongs to a layer mask "
+ "or channel."));
+ return FALSE;
+ }
+
+ gimp_image_undo_group_start (image, GIMP_UNDO_GROUP_FS_TO_LAYER,
+ C_("undo-type", "Floating Selection to Layer"));
+
+ gimp_image_undo_push_fs_to_layer (image, NULL, layer);
+
+ gimp_drawable_detach_floating_sel (gimp_layer_get_floating_sel_drawable (layer));
+ gimp_layer_set_floating_sel_drawable (layer, NULL);
+
+ gimp_item_set_visible (item, TRUE, TRUE);
+ gimp_layer_set_lock_alpha (layer, FALSE, TRUE);
+
+ gimp_image_undo_group_end (image);
+
+ /* When the floating selection is converted to/from a normal layer
+ * it does something resembling a name change, so emit the
+ * "name-changed" signal
+ */
+ gimp_object_name_changed (GIMP_OBJECT (layer));
+
+ gimp_drawable_update (GIMP_DRAWABLE (layer),
+ 0, 0,
+ gimp_item_get_width (item),
+ gimp_item_get_height (item));
+
+ return TRUE;
+}
+
+void
+floating_sel_activate_drawable (GimpLayer *layer)
+{
+ GimpImage *image;
+ GimpDrawable *drawable;
+
+ g_return_if_fail (GIMP_IS_LAYER (layer));
+ g_return_if_fail (gimp_layer_is_floating_sel (layer));
+
+ image = gimp_item_get_image (GIMP_ITEM (layer));
+
+ drawable = gimp_layer_get_floating_sel_drawable (layer);
+
+ /* set the underlying drawable to active */
+ if (GIMP_IS_LAYER_MASK (drawable))
+ {
+ GimpLayerMask *mask = GIMP_LAYER_MASK (drawable);
+
+ gimp_image_set_active_layer (image, gimp_layer_mask_get_layer (mask));
+ }
+ else if (GIMP_IS_CHANNEL (drawable))
+ {
+ gimp_image_set_active_channel (image, GIMP_CHANNEL (drawable));
+ }
+ else
+ {
+ gimp_image_set_active_layer (image, GIMP_LAYER (drawable));
+ }
+}
+
+const GimpBoundSeg *
+floating_sel_boundary (GimpLayer *layer,
+ gint *n_segs)
+{
+ g_return_val_if_fail (GIMP_IS_LAYER (layer), NULL);
+ g_return_val_if_fail (gimp_layer_is_floating_sel (layer), NULL);
+ g_return_val_if_fail (n_segs != NULL, NULL);
+
+ if (layer->fs.boundary_known == FALSE)
+ {
+ gint width, height;
+ gint off_x, off_y;
+
+ width = gimp_item_get_width (GIMP_ITEM (layer));
+ height = gimp_item_get_height (GIMP_ITEM (layer));
+ gimp_item_get_offset (GIMP_ITEM (layer), &off_x, &off_y);
+
+ if (layer->fs.segs)
+ g_free (layer->fs.segs);
+
+ if (gimp_drawable_has_alpha (GIMP_DRAWABLE (layer)))
+ {
+ GeglBuffer *buffer;
+ gint i;
+
+ /* find the segments */
+ buffer = gimp_drawable_get_buffer (GIMP_DRAWABLE (layer));
+
+ layer->fs.segs = gimp_boundary_find (buffer, NULL,
+ babl_format ("A float"),
+ GIMP_BOUNDARY_WITHIN_BOUNDS,
+ 0, 0, width, height,
+ GIMP_BOUNDARY_HALF_WAY,
+ &layer->fs.num_segs);
+
+ /* offset the segments */
+ for (i = 0; i < layer->fs.num_segs; i++)
+ {
+ layer->fs.segs[i].x1 += off_x;
+ layer->fs.segs[i].y1 += off_y;
+ layer->fs.segs[i].x2 += off_x;
+ layer->fs.segs[i].y2 += off_y;
+ }
+ }
+ else
+ {
+ layer->fs.num_segs = 4;
+ layer->fs.segs = g_new0 (GimpBoundSeg, 4);
+
+ /* top */
+ layer->fs.segs[0].x1 = off_x;
+ layer->fs.segs[0].y1 = off_y;
+ layer->fs.segs[0].x2 = off_x + width;
+ layer->fs.segs[0].y2 = off_y;
+
+ /* left */
+ layer->fs.segs[1].x1 = off_x;
+ layer->fs.segs[1].y1 = off_y;
+ layer->fs.segs[1].x2 = off_x;
+ layer->fs.segs[1].y2 = off_y + height;
+
+ /* right */
+ layer->fs.segs[2].x1 = off_x + width;
+ layer->fs.segs[2].y1 = off_y;
+ layer->fs.segs[2].x2 = off_x + width;
+ layer->fs.segs[2].y2 = off_y + height;
+
+ /* bottom */
+ layer->fs.segs[3].x1 = off_x;
+ layer->fs.segs[3].y1 = off_y + height;
+ layer->fs.segs[3].x2 = off_x + width;
+ layer->fs.segs[3].y2 = off_y + height;
+ }
+
+ layer->fs.boundary_known = TRUE;
+ }
+
+ *n_segs = layer->fs.num_segs;
+
+ return layer->fs.segs;
+}
+
+void
+floating_sel_invalidate (GimpLayer *layer)
+{
+ g_return_if_fail (GIMP_IS_LAYER (layer));
+ g_return_if_fail (gimp_layer_is_floating_sel (layer));
+
+ /* Invalidate the attached-to drawable's preview */
+ gimp_viewable_invalidate_preview (GIMP_VIEWABLE (gimp_layer_get_floating_sel_drawable (layer)));
+
+ /* Invalidate the boundary */
+ layer->fs.boundary_known = FALSE;
+}
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