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gimp/app/core/gimpimage-resize.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 "gimp.h"
#include "gimpcontainer.h"
#include "gimpcontext.h"
#include "gimpguide.h"
#include "gimpimage.h"
#include "gimpimage-guides.h"
#include "gimpimage-item-list.h"
#include "gimpimage-resize.h"
#include "gimpimage-sample-points.h"
#include "gimpimage-undo.h"
#include "gimpimage-undo-push.h"
#include "gimplayer.h"
#include "gimpobjectqueue.h"
#include "gimpprogress.h"
#include "gimpsamplepoint.h"
#include "text/gimptextlayer.h"
#include "gimp-intl.h"
void
gimp_image_resize (GimpImage *image,
GimpContext *context,
gint new_width,
gint new_height,
gint offset_x,
gint offset_y,
GimpProgress *progress)
{
gimp_image_resize_with_layers (image, context, GIMP_FILL_TRANSPARENT,
new_width, new_height, offset_x, offset_y,
GIMP_ITEM_SET_NONE, TRUE,
progress);
}
void
gimp_image_resize_with_layers (GimpImage *image,
GimpContext *context,
GimpFillType fill_type,
gint new_width,
gint new_height,
gint offset_x,
gint offset_y,
GimpItemSet layer_set,
gboolean resize_text_layers,
GimpProgress *progress)
{
GimpObjectQueue *queue;
GList *resize_layers;
GList *list;
GimpItem *item;
gint old_width, old_height;
g_return_if_fail (GIMP_IS_IMAGE (image));
g_return_if_fail (GIMP_IS_CONTEXT (context));
g_return_if_fail (new_width > 0 && new_height > 0);
g_return_if_fail (progress == NULL || GIMP_IS_PROGRESS (progress));
gimp_set_busy (image->gimp);
g_object_freeze_notify (G_OBJECT (image));
gimp_image_undo_group_start (image, GIMP_UNDO_GROUP_IMAGE_RESIZE,
C_("undo-type", "Resize Image"));
resize_layers = gimp_image_item_list_get_list (image,
GIMP_ITEM_TYPE_LAYERS,
layer_set);
old_width = gimp_image_get_width (image);
old_height = gimp_image_get_height (image);
/* Push the image size to the stack */
gimp_image_undo_push_image_size (image, NULL,
-offset_x, -offset_y,
new_width, new_height);
/* Set the new width and height */
g_object_set (image,
"width", new_width,
"height", new_height,
NULL);
/* Reposition all layers */
for (list = gimp_image_get_layer_iter (image);
list;
list = g_list_next (list))
{
GimpItem *item = list->data;
gimp_item_translate (item, offset_x, offset_y, TRUE);
}
queue = gimp_object_queue_new (progress);
progress = GIMP_PROGRESS (queue);
for (list = resize_layers; list; list = g_list_next (list))
{
GimpItem *item = list->data;
/* group layers can't be resized here */
if (gimp_viewable_get_children (GIMP_VIEWABLE (item)))
continue;
if (! resize_text_layers && gimp_item_is_text_layer (item))
continue;
/* note that we call gimp_item_start_move(), and not
* gimp_item_start_transform(). see the comment in gimp_item_resize()
* for more information.
*/
gimp_item_start_move (item, TRUE);
gimp_object_queue_push (queue, item);
}
g_list_free (resize_layers);
gimp_object_queue_push (queue, gimp_image_get_mask (image));
gimp_object_queue_push_container (queue, gimp_image_get_channels (image));
gimp_object_queue_push_container (queue, gimp_image_get_vectors (image));
/* Resize all resize_layers, channels (including selection mask), and
* vectors
*/
while ((item = gimp_object_queue_pop (queue)))
{
if (GIMP_IS_LAYER (item))
{
gint old_offset_x;
gint old_offset_y;
gimp_item_get_offset (item, &old_offset_x, &old_offset_y);
gimp_item_resize (item, context, fill_type,
new_width, new_height,
old_offset_x, old_offset_y);
gimp_item_end_move (item, TRUE);
}
else
{
gimp_item_resize (item, context, GIMP_FILL_TRANSPARENT,
new_width, new_height, offset_x, offset_y);
}
}
/* Reposition or remove all guides */
list = gimp_image_get_guides (image);
while (list)
{
GimpGuide *guide = list->data;
gboolean remove_guide = FALSE;
gint new_position = gimp_guide_get_position (guide);
list = g_list_next (list);
switch (gimp_guide_get_orientation (guide))
{
case GIMP_ORIENTATION_HORIZONTAL:
new_position += offset_y;
if (new_position < 0 || new_position > new_height)
remove_guide = TRUE;
break;
case GIMP_ORIENTATION_VERTICAL:
new_position += offset_x;
if (new_position < 0 || new_position > new_width)
remove_guide = TRUE;
break;
default:
break;
}
if (remove_guide)
gimp_image_remove_guide (image, guide, TRUE);
else if (new_position != gimp_guide_get_position (guide))
gimp_image_move_guide (image, guide, new_position, TRUE);
}
/* Reposition or remove sample points */
list = gimp_image_get_sample_points (image);
while (list)
{
GimpSamplePoint *sample_point = list->data;
gboolean remove_sample_point = FALSE;
gint old_x;
gint old_y;
gint new_x;
gint new_y;
list = g_list_next (list);
gimp_sample_point_get_position (sample_point, &old_x, &old_y);
new_y = old_y + offset_y;
if ((new_y < 0) || (new_y >= new_height))
remove_sample_point = TRUE;
new_x = old_x + offset_x;
if ((new_x < 0) || (new_x >= new_width))
remove_sample_point = TRUE;
if (remove_sample_point)
gimp_image_remove_sample_point (image, sample_point, TRUE);
else if (new_x != old_x || new_y != old_y)
gimp_image_move_sample_point (image, sample_point,
new_x, new_y, TRUE);
}
g_object_unref (queue);
gimp_image_undo_group_end (image);
gimp_image_size_changed_detailed (image,
offset_x, offset_y,
old_width, old_height);
g_object_thaw_notify (G_OBJECT (image));
gimp_unset_busy (image->gimp);
}
void
gimp_image_resize_to_layers (GimpImage *image,
GimpContext *context,
gint *offset_x,
gint *offset_y,
gint *new_width,
gint *new_height,
GimpProgress *progress)
{
GList *list;
GimpItem *item;
gint x, y;
gint width, height;
g_return_if_fail (GIMP_IS_IMAGE (image));
g_return_if_fail (GIMP_IS_CONTEXT (context));
g_return_if_fail (progress == NULL || GIMP_IS_PROGRESS (progress));
list = gimp_image_get_layer_iter (image);
if (! list)
return;
/* figure out starting values */
item = list->data;
x = gimp_item_get_offset_x (item);
y = gimp_item_get_offset_y (item);
width = gimp_item_get_width (item);
height = gimp_item_get_height (item);
/* Respect all layers */
for (list = g_list_next (list); list; list = g_list_next (list))
{
item = list->data;
gimp_rectangle_union (x, y,
width, height,
gimp_item_get_offset_x (item),
gimp_item_get_offset_y (item),
gimp_item_get_width (item),
gimp_item_get_height (item),
&x, &y,
&width, &height);
}
gimp_image_resize (image, context,
width, height, -x, -y,
progress);
if (offset_x)
*offset_x = -x;
if (offset_y)
*offset_y = -y;
if (new_width)
*new_width = width;
if (new_height)
*new_height = height;
}
void
gimp_image_resize_to_selection (GimpImage *image,
GimpContext *context,
GimpProgress *progress)
{
GimpChannel *selection = gimp_image_get_mask (image);
gint x, y, w, h;
if (gimp_item_bounds (GIMP_ITEM (selection), &x, &y, &w, &h))
{
gimp_image_resize (image, context,
w, h, -x, -y,
progress);
}
}
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