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83545ee94de81df038cd6dba49bc99363cf10d18
gimp/app/core/gimpselection.c
Jehan 9a2f5b0709 app: rework and fix the logic for copy-pasting multiple drawables. 
There were a lot of incertainty of what should happen when we copy layers being
descendant of each other (i.e. when you select a group layer and some of its
children), then when you paste such data. So we sat down with Aryeom and tried
to come up with some consistent behavior which is somewhat expectable, but also
which would allow the most use-case.

Otherwise it was making very weird result when pasting the data, duplicating
some layers and whatnot, which was obviously a buggy behavior and never the
expected result.

We decided that if you select one leaf item, then even if you also selected a
parent item, it would be as though the parent was not selected. This is very
often what you expect anyway when you select a whole bunch of layers and would
work well if, say, you shift-click over many layers in sub-groups. Then you
wouldn't have to manually ctrl-click to unselect every group.

Then what if you were instead expecting to copy many groups? Then you could
shift-click the group arrow, closing all same-level groups. Once they are all
closed, you can shift-click the groups to only select group layers, not their
contents.

This way, both use cases are still quite doable easily with this default choice.
2022-11-12 18:28:58 +01:00

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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 <cairo.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <gegl.h>
#include "libgimpcolor/gimpcolor.h"
#include "core-types.h"
#include "gegl/gimp-babl.h"
#include "gegl/gimp-gegl-apply-operation.h"
#include "gegl/gimp-gegl-loops.h"
#include "gimp.h"
#include "gimpcontext.h"
#include "gimpdrawable-edit.h"
#include "gimpdrawable-private.h"
#include "gimperror.h"
#include "gimpimage.h"
#include "gimpimage-new.h"
#include "gimpimage-undo.h"
#include "gimpimage-undo-push.h"
#include "gimplayer.h"
#include "gimplayer-new.h"
#include "gimplayermask.h"
#include "gimplayer-floating-selection.h"
#include "gimppickable.h"
#include "gimpselection.h"
#include "gimp-intl.h"
static gboolean gimp_selection_is_attached (GimpItem *item);
static GimpItemTree * gimp_selection_get_tree (GimpItem *item);
static void gimp_selection_translate (GimpItem *item,
gdouble offset_x,
gdouble offset_y,
gboolean push_undo);
static void gimp_selection_scale (GimpItem *item,
gint new_width,
gint new_height,
gint new_offset_x,
gint new_offset_y,
GimpInterpolationType interp_type,
GimpProgress *progress);
static void gimp_selection_resize (GimpItem *item,
GimpContext *context,
GimpFillType fill_type,
gint new_width,
gint new_height,
gint offset_x,
gint offset_y);
static void gimp_selection_flip (GimpItem *item,
GimpContext *context,
GimpOrientationType flip_type,
gdouble axis,
gboolean clip_result);
static void gimp_selection_rotate (GimpItem *item,
GimpContext *context,
GimpRotationType rotation_type,
gdouble center_x,
gdouble center_y,
gboolean clip_result);
static gboolean gimp_selection_fill (GimpItem *item,
GimpDrawable *drawable,
GimpFillOptions *fill_options,
gboolean push_undo,
GimpProgress *progress,
GError **error);
static gboolean gimp_selection_stroke (GimpItem *item,
GimpDrawable *drawable,
GimpStrokeOptions *stroke_options,
gboolean push_undo,
GimpProgress *progress,
GError **error);
static void gimp_selection_convert_type (GimpDrawable *drawable,
GimpImage *dest_image,
const Babl *new_format,
GimpColorProfile *src_profile,
GimpColorProfile *dest_profile,
GeglDitherMethod layer_dither_type,
GeglDitherMethod mask_dither_type,
gboolean push_undo,
GimpProgress *progress);
static void gimp_selection_invalidate_boundary (GimpDrawable *drawable);
static gboolean gimp_selection_boundary (GimpChannel *channel,
const GimpBoundSeg **segs_in,
const GimpBoundSeg **segs_out,
gint *num_segs_in,
gint *num_segs_out,
gint x1,
gint y1,
gint x2,
gint y2);
static gboolean gimp_selection_is_empty (GimpChannel *channel);
static void gimp_selection_feather (GimpChannel *channel,
gdouble radius_x,
gdouble radius_y,
gboolean edge_lock,
gboolean push_undo);
static void gimp_selection_sharpen (GimpChannel *channel,
gboolean push_undo);
static void gimp_selection_clear (GimpChannel *channel,
const gchar *undo_desc,
gboolean push_undo);
static void gimp_selection_all (GimpChannel *channel,
gboolean push_undo);
static void gimp_selection_invert (GimpChannel *channel,
gboolean push_undo);
static void gimp_selection_border (GimpChannel *channel,
gint radius_x,
gint radius_y,
GimpChannelBorderStyle style,
gboolean edge_lock,
gboolean push_undo);
static void gimp_selection_grow (GimpChannel *channel,
gint radius_x,
gint radius_y,
gboolean push_undo);
static void gimp_selection_shrink (GimpChannel *channel,
gint radius_x,
gint radius_y,
gboolean edge_lock,
gboolean push_undo);
static void gimp_selection_flood (GimpChannel *channel,
gboolean push_undo);
G_DEFINE_TYPE (GimpSelection, gimp_selection, GIMP_TYPE_CHANNEL)
#define parent_class gimp_selection_parent_class
static void
gimp_selection_class_init (GimpSelectionClass *klass)
{
GimpViewableClass *viewable_class = GIMP_VIEWABLE_CLASS (klass);
GimpItemClass *item_class = GIMP_ITEM_CLASS (klass);
GimpDrawableClass *drawable_class = GIMP_DRAWABLE_CLASS (klass);
GimpChannelClass *channel_class = GIMP_CHANNEL_CLASS (klass);
viewable_class->default_icon_name = "gimp-selection";
item_class->is_attached = gimp_selection_is_attached;
item_class->get_tree = gimp_selection_get_tree;
item_class->translate = gimp_selection_translate;
item_class->scale = gimp_selection_scale;
item_class->resize = gimp_selection_resize;
item_class->flip = gimp_selection_flip;
item_class->rotate = gimp_selection_rotate;
item_class->fill = gimp_selection_fill;
item_class->stroke = gimp_selection_stroke;
item_class->default_name = _("Selection Mask");
item_class->translate_desc = C_("undo-type", "Move Selection");
item_class->fill_desc = C_("undo-type", "Fill Selection");
item_class->stroke_desc = C_("undo-type", "Stroke Selection");
drawable_class->convert_type = gimp_selection_convert_type;
drawable_class->invalidate_boundary = gimp_selection_invalidate_boundary;
channel_class->boundary = gimp_selection_boundary;
channel_class->is_empty = gimp_selection_is_empty;
channel_class->feather = gimp_selection_feather;
channel_class->sharpen = gimp_selection_sharpen;
channel_class->clear = gimp_selection_clear;
channel_class->all = gimp_selection_all;
channel_class->invert = gimp_selection_invert;
channel_class->border = gimp_selection_border;
channel_class->grow = gimp_selection_grow;
channel_class->shrink = gimp_selection_shrink;
channel_class->flood = gimp_selection_flood;
channel_class->feather_desc = C_("undo-type", "Feather Selection");
channel_class->sharpen_desc = C_("undo-type", "Sharpen Selection");
channel_class->clear_desc = C_("undo-type", "Select None");
channel_class->all_desc = C_("undo-type", "Select All");
channel_class->invert_desc = C_("undo-type", "Invert Selection");
channel_class->border_desc = C_("undo-type", "Border Selection");
channel_class->grow_desc = C_("undo-type", "Grow Selection");
channel_class->shrink_desc = C_("undo-type", "Shrink Selection");
channel_class->flood_desc = C_("undo-type", "Remove Holes");
}
static void
gimp_selection_init (GimpSelection *selection)
{
}
static gboolean
gimp_selection_is_attached (GimpItem *item)
{
return (GIMP_IS_IMAGE (gimp_item_get_image (item)) &&
gimp_image_get_mask (gimp_item_get_image (item)) ==
GIMP_CHANNEL (item));
}
static GimpItemTree *
gimp_selection_get_tree (GimpItem *item)
{
return NULL;
}
static void
gimp_selection_translate (GimpItem *item,
gdouble offset_x,
gdouble offset_y,
gboolean push_undo)
{
GIMP_ITEM_CLASS (parent_class)->translate (item, offset_x, offset_y,
push_undo);
}
static void
gimp_selection_scale (GimpItem *item,
gint new_width,
gint new_height,
gint new_offset_x,
gint new_offset_y,
GimpInterpolationType interp_type,
GimpProgress *progress)
{
GIMP_ITEM_CLASS (parent_class)->scale (item, new_width, new_height,
new_offset_x, new_offset_y,
interp_type, progress);
gimp_item_set_offset (item, 0, 0);
}
static void
gimp_selection_resize (GimpItem *item,
GimpContext *context,
GimpFillType fill_type,
gint new_width,
gint new_height,
gint offset_x,
gint offset_y)
{
GIMP_ITEM_CLASS (parent_class)->resize (item, context, GIMP_FILL_TRANSPARENT,
new_width, new_height,
offset_x, offset_y);
gimp_item_set_offset (item, 0, 0);
}
static void
gimp_selection_flip (GimpItem *item,
GimpContext *context,
GimpOrientationType flip_type,
gdouble axis,
gboolean clip_result)
{
GIMP_ITEM_CLASS (parent_class)->flip (item, context, flip_type, axis, TRUE);
}
static void
gimp_selection_rotate (GimpItem *item,
GimpContext *context,
GimpRotationType rotation_type,
gdouble center_x,
gdouble center_y,
gboolean clip_result)
{
GIMP_ITEM_CLASS (parent_class)->rotate (item, context, rotation_type,
center_x, center_y,
clip_result);
}
static gboolean
gimp_selection_fill (GimpItem *item,
GimpDrawable *drawable,
GimpFillOptions *fill_options,
gboolean push_undo,
GimpProgress *progress,
GError **error)
{
GimpSelection *selection = GIMP_SELECTION (item);
const GimpBoundSeg *dummy_in;
const GimpBoundSeg *dummy_out;
gint num_dummy_in;
gint num_dummy_out;
gboolean retval;
if (! gimp_channel_boundary (GIMP_CHANNEL (selection),
&dummy_in, &dummy_out,
&num_dummy_in, &num_dummy_out,
0, 0, 0, 0))
{
g_set_error_literal (error, GIMP_ERROR, GIMP_FAILED,
_("There is no selection to fill."));
return FALSE;
}
gimp_selection_suspend (selection);
retval = GIMP_ITEM_CLASS (parent_class)->fill (item, drawable,
fill_options,
push_undo, progress, error);
gimp_selection_resume (selection);
return retval;
}
static gboolean
gimp_selection_stroke (GimpItem *item,
GimpDrawable *drawable,
GimpStrokeOptions *stroke_options,
gboolean push_undo,
GimpProgress *progress,
GError **error)
{
GimpSelection *selection = GIMP_SELECTION (item);
const GimpBoundSeg *dummy_in;
const GimpBoundSeg *dummy_out;
gint num_dummy_in;
gint num_dummy_out;
gboolean retval;
if (! gimp_channel_boundary (GIMP_CHANNEL (selection),
&dummy_in, &dummy_out,
&num_dummy_in, &num_dummy_out,
0, 0, 0, 0))
{
g_set_error_literal (error, GIMP_ERROR, GIMP_FAILED,
_("There is no selection to stroke."));
return FALSE;
}
gimp_selection_suspend (selection);
retval = GIMP_ITEM_CLASS (parent_class)->stroke (item, drawable,
stroke_options,
push_undo, progress, error);
gimp_selection_resume (selection);
return retval;
}
static void
gimp_selection_convert_type (GimpDrawable *drawable,
GimpImage *dest_image,
const Babl *new_format,
GimpColorProfile *src_profile,
GimpColorProfile *dest_profile,
GeglDitherMethod layer_dither_type,
GeglDitherMethod mask_dither_type,
gboolean push_undo,
GimpProgress *progress)
{
new_format =
gimp_babl_mask_format (gimp_babl_format_get_precision (new_format));
GIMP_DRAWABLE_CLASS (parent_class)->convert_type (drawable, dest_image,
new_format,
src_profile,
dest_profile,
layer_dither_type,
mask_dither_type,
push_undo,
progress);
}
static void
gimp_selection_invalidate_boundary (GimpDrawable *drawable)
{
GimpImage *image = gimp_item_get_image (GIMP_ITEM (drawable));
GList *layers;
/* Turn the current selection off */
gimp_image_selection_invalidate (image);
GIMP_DRAWABLE_CLASS (parent_class)->invalidate_boundary (drawable);
/* If there is a floating selection, update it's area...
* we need to do this since this selection mask can act as an additional
* mask in the composition of the floating selection
*/
layers = gimp_image_get_selected_layers (image);
if (g_list_length (layers) == 1 && gimp_layer_is_floating_sel (layers->data))
{
gimp_drawable_update (GIMP_DRAWABLE (layers->data), 0, 0, -1, -1);
}
#if 0
/* invalidate the preview */
drawable->private->preview_valid = FALSE;
#endif
}
static gboolean
gimp_selection_boundary (GimpChannel *channel,
const GimpBoundSeg **segs_in,
const GimpBoundSeg **segs_out,
gint *num_segs_in,
gint *num_segs_out,
gint unused1,
gint unused2,
gint unused3,
gint unused4)
{
GimpImage *image = gimp_item_get_image (GIMP_ITEM (channel));
GimpLayer *floating_selection;
GList *drawables;
GList *layers;
gboolean channel_selected;
drawables = gimp_image_get_selected_drawables (image);
channel_selected = (drawables && GIMP_IS_CHANNEL (drawables->data));
g_list_free (drawables);
if ((floating_selection = gimp_image_get_floating_selection (image)))
{
/* If there is a floating selection, then
* we need to do some slightly different boundaries.
* Instead of inside and outside boundaries being defined
* by the extents of the layer, the inside boundary (the one
* that actually marches and is black/white) is the boundary of
* the floating selection. The outside boundary (doesn't move,
* is black/gray) is defined as the normal selection mask
*/
/* Find the selection mask boundary */
GIMP_CHANNEL_CLASS (parent_class)->boundary (channel,
segs_in, segs_out,
num_segs_in, num_segs_out,
0, 0, 0, 0);
/* Find the floating selection boundary */
*segs_in = floating_sel_boundary (floating_selection, num_segs_in);
return TRUE;
}
else if (channel_selected)
{
/* Otherwise, return the boundary...if a channels are selected */
return GIMP_CHANNEL_CLASS (parent_class)->boundary (channel,
segs_in, segs_out,
num_segs_in,
num_segs_out,
0, 0,
gimp_image_get_width (image),
gimp_image_get_height (image));
}
else if ((layers = gimp_image_get_selected_layers (image)))
{
/* If layers are selected, we return multiple boundaries based
* on the extents
*/
GList *iter;
gint x1, y1;
gint x2 = G_MININT;
gint y2 = G_MININT;
gint offset_x = G_MAXINT;
gint offset_y = G_MAXINT;
for (iter = layers; iter; iter = iter->next)
{
gint item_off_x, item_off_y;
gint item_x2, item_y2;
gimp_item_get_offset (iter->data, &item_off_x, &item_off_y);
offset_x = MIN (offset_x, item_off_x);
offset_y = MIN (offset_y, item_off_y);
item_x2 = item_off_x + gimp_item_get_width (GIMP_ITEM (iter->data));
item_y2 = item_off_y + gimp_item_get_height (GIMP_ITEM (iter->data));
x2 = MAX (x2, item_x2);
y2 = MAX (y2, item_y2);
}
x1 = CLAMP (offset_x, 0, gimp_image_get_width (image));
y1 = CLAMP (offset_y, 0, gimp_image_get_height (image));
x2 = CLAMP (x2, 0, gimp_image_get_width (image));
y2 = CLAMP (y2, 0, gimp_image_get_height (image));
return GIMP_CHANNEL_CLASS (parent_class)->boundary (channel,
segs_in, segs_out,
num_segs_in,
num_segs_out,
x1, y1, x2, y2);
}
*segs_in = NULL;
*segs_out = NULL;
*num_segs_in = 0;
*num_segs_out = 0;
return FALSE;
}
static gboolean
gimp_selection_is_empty (GimpChannel *channel)
{
GimpSelection *selection = GIMP_SELECTION (channel);
/* in order to allow stroking of selections, we need to pretend here
* that the selection mask is empty so that it doesn't mask the paint
* during the stroke operation.
*/
if (selection->suspend_count > 0)
return TRUE;
return GIMP_CHANNEL_CLASS (parent_class)->is_empty (channel);
}
static void
gimp_selection_feather (GimpChannel *channel,
gdouble radius_x,
gdouble radius_y,
gboolean edge_lock,
gboolean push_undo)
{
GIMP_CHANNEL_CLASS (parent_class)->feather (channel, radius_x, radius_y,
edge_lock, push_undo);
}
static void
gimp_selection_sharpen (GimpChannel *channel,
gboolean push_undo)
{
GIMP_CHANNEL_CLASS (parent_class)->sharpen (channel, push_undo);
}
static void
gimp_selection_clear (GimpChannel *channel,
const gchar *undo_desc,
gboolean push_undo)
{
GIMP_CHANNEL_CLASS (parent_class)->clear (channel, undo_desc, push_undo);
}
static void
gimp_selection_all (GimpChannel *channel,
gboolean push_undo)
{
GIMP_CHANNEL_CLASS (parent_class)->all (channel, push_undo);
}
static void
gimp_selection_invert (GimpChannel *channel,
gboolean push_undo)
{
GIMP_CHANNEL_CLASS (parent_class)->invert (channel, push_undo);
}
static void
gimp_selection_border (GimpChannel *channel,
gint radius_x,
gint radius_y,
GimpChannelBorderStyle style,
gboolean edge_lock,
gboolean push_undo)
{
GIMP_CHANNEL_CLASS (parent_class)->border (channel,
radius_x, radius_y,
style, edge_lock,
push_undo);
}
static void
gimp_selection_grow (GimpChannel *channel,
gint radius_x,
gint radius_y,
gboolean push_undo)
{
GIMP_CHANNEL_CLASS (parent_class)->grow (channel,
radius_x, radius_y,
push_undo);
}
static void
gimp_selection_shrink (GimpChannel *channel,
gint radius_x,
gint radius_y,
gboolean edge_lock,
gboolean push_undo)
{
GIMP_CHANNEL_CLASS (parent_class)->shrink (channel,
radius_x, radius_y, edge_lock,
push_undo);
}
static void
gimp_selection_flood (GimpChannel *channel,
gboolean push_undo)
{
GIMP_CHANNEL_CLASS (parent_class)->flood (channel, push_undo);
}
/* public functions */
GimpChannel *
gimp_selection_new (GimpImage *image,
gint width,
gint height)
{
GimpRGB black = { 0.0, 0.0, 0.0, 0.5 };
GimpChannel *channel;
g_return_val_if_fail (GIMP_IS_IMAGE (image), NULL);
g_return_val_if_fail (width > 0 && height > 0, NULL);
channel = GIMP_CHANNEL (gimp_drawable_new (GIMP_TYPE_SELECTION,
image, NULL,
0, 0, width, height,
gimp_image_get_mask_format (image)));
gimp_channel_set_color (channel, &black, FALSE);
gimp_channel_set_show_masked (channel, TRUE);
channel->x2 = width;
channel->y2 = height;
return channel;
}
gint
gimp_selection_suspend (GimpSelection *selection)
{
g_return_val_if_fail (GIMP_IS_SELECTION (selection), 0);
selection->suspend_count++;
return selection->suspend_count;
}
gint
gimp_selection_resume (GimpSelection *selection)
{
g_return_val_if_fail (GIMP_IS_SELECTION (selection), 0);
g_return_val_if_fail (selection->suspend_count > 0, 0);
selection->suspend_count--;
return selection->suspend_count;
}
GeglBuffer *
gimp_selection_extract (GimpSelection *selection,
GList *pickables,
GimpContext *context,
gboolean cut_image,
gboolean keep_indexed,
gboolean add_alpha,
gint *offset_x,
gint *offset_y,
GError **error)
{
GimpImage *image = NULL;
GimpImage *temp_image = NULL;
GimpPickable *pickable = NULL;
GeglBuffer *src_buffer;
GeglBuffer *dest_buffer;
GList *iter;
const Babl *src_format;
const Babl *dest_format;
gint x1, y1, x2, y2;
gboolean non_empty;
gint off_x, off_y;
g_return_val_if_fail (GIMP_IS_SELECTION (selection), NULL);
g_return_val_if_fail (GIMP_IS_CONTEXT (context), NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
g_return_val_if_fail (pickables != NULL, NULL);
for (iter = pickables; iter; iter = iter->next)
{
g_return_val_if_fail (GIMP_IS_PICKABLE (iter->data), NULL);
if (GIMP_IS_ITEM (iter->data))
g_return_val_if_fail (gimp_item_is_attached (iter->data), NULL);
if (! image)
image = gimp_pickable_get_image (iter->data);
else
g_return_val_if_fail (image == gimp_pickable_get_image (iter->data), NULL);
}
if (g_list_length (pickables) == 1)
{
pickable = pickables->data;
}
else
{
for (iter = pickables; iter; iter = iter->next)
g_return_val_if_fail (GIMP_IS_DRAWABLE (iter->data), NULL);
temp_image = gimp_image_new_from_drawables (image->gimp, pickables, TRUE, FALSE);
selection = GIMP_SELECTION (gimp_image_get_mask (temp_image));
pickable = GIMP_PICKABLE (temp_image);
/* Don't cut from the temporary image. */
cut_image = FALSE;
}
/* If there are no bounds, then just extract the entire image
* This may not be the correct behavior, but after getting rid
* of floating selections, it's still tempting to "cut" or "copy"
* a small layer and expect it to work, even though there is no
* actual selection mask
*/
if (GIMP_IS_DRAWABLE (pickable))
{
non_empty = gimp_item_mask_bounds (GIMP_ITEM (pickable),
&x1, &y1, &x2, &y2);
gimp_item_get_offset (GIMP_ITEM (pickable), &off_x, &off_y);
}
else
{
non_empty = gimp_item_bounds (GIMP_ITEM (selection),
&x1, &y1, &x2, &y2);
x2 += x1;
y2 += y1;
off_x = 0;
off_y = 0;
/* can't cut from non-drawables, fall back to copy */
cut_image = FALSE;
}
if (non_empty && ((x1 == x2) || (y1 == y2)))
{
g_set_error_literal (error, GIMP_ERROR, GIMP_FAILED,
_("Unable to cut or copy because the "
"selected region is empty."));
if (temp_image)
g_object_unref (temp_image);
return NULL;
}
/* If there is a selection, we must add alpha because the selection
* could have any shape.
*/
if (non_empty)
add_alpha = TRUE;
src_format = gimp_pickable_get_format (pickable);
/* How many bytes in the temp buffer? */
if (babl_format_is_palette (src_format) && ! keep_indexed)
{
dest_format = gimp_image_get_format (image, GIMP_RGB,
gimp_image_get_precision (image),
add_alpha ||
babl_format_has_alpha (src_format),
babl_format_get_space (src_format));
}
else
{
if (add_alpha)
dest_format = gimp_pickable_get_format_with_alpha (pickable);
else
dest_format = src_format;
}
gimp_pickable_flush (pickable);
src_buffer = gimp_pickable_get_buffer (pickable);
/* Allocate the temp buffer */
dest_buffer = gegl_buffer_new (GEGL_RECTANGLE (0, 0, x2 - x1, y2 - y1),
dest_format);
/* First, copy the pixels, possibly doing INDEXED->RGB and adding alpha */
gimp_gegl_buffer_copy (src_buffer, GEGL_RECTANGLE (x1, y1, x2 - x1, y2 - y1),
GEGL_ABYSS_NONE,
dest_buffer, GEGL_RECTANGLE (0, 0, 0, 0));
if (non_empty)
{
/* If there is a selection, mask the dest_buffer with it */
GeglBuffer *mask_buffer;
mask_buffer = gimp_drawable_get_buffer (GIMP_DRAWABLE (selection));
gimp_gegl_apply_opacity (dest_buffer, NULL, NULL, dest_buffer,
mask_buffer,
- (off_x + x1),
- (off_y + y1),
1.0);
if (cut_image)
{
gimp_drawable_edit_clear (GIMP_DRAWABLE (pickable), context);
}
}
else if (cut_image)
{
/* If we're cutting without selection, remove either the layer
* (or floating selection), the layer mask, or the channel
*/
if (GIMP_IS_LAYER (pickable))
{
gimp_image_remove_layer (image, GIMP_LAYER (pickable),
TRUE, NULL);
}
else if (GIMP_IS_LAYER_MASK (pickable))
{
gimp_layer_apply_mask (gimp_layer_mask_get_layer (GIMP_LAYER_MASK (pickable)),
GIMP_MASK_DISCARD, TRUE);
}
else if (GIMP_IS_CHANNEL (pickable))
{
gimp_image_remove_channel (image, GIMP_CHANNEL (pickable),
TRUE, NULL);
}
}
*offset_x = x1 + off_x;
*offset_y = y1 + off_y;
if (temp_image)
g_object_unref (temp_image);
return dest_buffer;
}
GimpLayer *
gimp_selection_float (GimpSelection *selection,
GList *drawables,
GimpContext *context,
gboolean cut_image,
gint off_x,
gint off_y,
GError **error)
{
GimpImage *image;
GimpLayer *layer;
GeglBuffer *buffer;
GimpColorProfile *profile;
GimpImage *temp_image = NULL;
const Babl *format = NULL;
GList *iter;
gint x1, y1;
gint x2, y2;
g_return_val_if_fail (GIMP_IS_SELECTION (selection), NULL);
g_return_val_if_fail (GIMP_IS_CONTEXT (context), NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
for (iter = drawables; iter; iter = iter->next)
{
g_return_val_if_fail (GIMP_IS_DRAWABLE (iter->data), NULL);
g_return_val_if_fail (gimp_item_is_attached (iter->data), NULL);
if (! format)
format = gimp_drawable_get_format_with_alpha (iter->data);
else
g_return_val_if_fail (format == gimp_drawable_get_format_with_alpha (iter->data),
NULL);
}
image = gimp_item_get_image (GIMP_ITEM (selection));
/* Make sure there is a region to float... */
for (iter = drawables; iter; iter = iter->next)
{
if (gimp_item_mask_bounds (iter->data, &x1, &y1, &x2, &y2) &&
x1 != x2 && y1 != y2)
break;
}
if (iter == NULL)
{
g_set_error_literal (error, GIMP_ERROR, GIMP_FAILED,
_("Cannot float selection because the selected "
"region is empty."));
return NULL;
}
/* Start an undo group */
gimp_image_undo_group_start (image, GIMP_UNDO_GROUP_FS_FLOAT,
C_("undo-type", "Float Selection"));
/* Cut or copy the selected region */
buffer = gimp_selection_extract (selection, drawables, context,
cut_image, FALSE, TRUE,
&x1, &y1, NULL);
profile = gimp_color_managed_get_color_profile (GIMP_COLOR_MANAGED (drawables->data));
/* Clear the selection */
gimp_channel_clear (GIMP_CHANNEL (selection), NULL, TRUE);
/* Create a new layer from the buffer, using the drawables' type
* because it may be different from the image's type if we cut from
* a channel or layer mask
*/
layer = gimp_layer_new_from_gegl_buffer (buffer, image, format,
_("Floated Layer"),
GIMP_OPACITY_OPAQUE,
gimp_image_get_default_new_layer_mode (image),
profile);
/* Set the offsets */
gimp_item_set_offset (GIMP_ITEM (layer), x1 + off_x, y1 + off_y);
/* Free the temp buffer */
g_object_unref (buffer);
/* Add the floating layer to the image */
floating_sel_attach (layer, drawables->data);
/* End an undo group */
gimp_image_undo_group_end (image);
/* invalidate the image's boundary variables */
GIMP_CHANNEL (selection)->boundary_known = FALSE;
if (temp_image)
g_object_unref (temp_image);
return layer;
}
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