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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 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <glib-object.h>
#include "core-types.h"
#include "gimp.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 "gimplist.h"
#include "gimpprogress.h"
#include "gimpsamplepoint.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,
new_width, new_height, offset_x, offset_y,
GIMP_ITEM_SET_NONE,
progress);
}
void
gimp_image_resize_with_layers (GimpImage *image,
GimpContext *context,
gint new_width,
gint new_height,
gint offset_x,
gint offset_y,
GimpItemSet layer_set,
GimpProgress *progress)
{
GList *list;
GList *resize_layers;
gdouble progress_max;
gdouble progress_current = 1.0;
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);
progress_max = (image->channels->num_children +
image->layers->num_children +
image->vectors->num_children +
1 /* selection */);
g_object_freeze_notify (G_OBJECT (image));
gimp_image_undo_group_start (image, GIMP_UNDO_GROUP_IMAGE_RESIZE,
_("Resize Image"));
resize_layers = gimp_image_item_list_get_list (image, NULL,
GIMP_ITEM_TYPE_LAYERS,
layer_set);
old_width = image->width;
old_height = image->height;
/* Push the image size to the stack */
gimp_image_undo_push_image_size (image, NULL);
/* Set the new width and height */
g_object_set (image,
"width", new_width,
"height", new_height,
NULL);
/* Resize all channels */
for (list = GIMP_LIST (image->channels)->list;
list;
list = g_list_next (list))
{
GimpItem *item = list->data;
gimp_item_resize (item, context,
new_width, new_height, offset_x, offset_y);
if (progress)
gimp_progress_set_value (progress, progress_current++ / progress_max);
}
/* Resize all vectors */
for (list = GIMP_LIST (image->vectors)->list;
list;
list = g_list_next (list))
{
GimpItem *item = list->data;
gimp_item_resize (item, context,
new_width, new_height, offset_x, offset_y);
if (progress)
gimp_progress_set_value (progress, progress_current++ / progress_max);
}
/* Don't forget the selection mask! */
gimp_item_resize (GIMP_ITEM (gimp_image_get_mask (image)), context,
new_width, new_height, offset_x, offset_y);
if (progress)
gimp_progress_set_value (progress, progress_current++ / progress_max);
/* Reposition all layers */
for (list = GIMP_LIST (image->layers)->list;
list;
list = g_list_next (list))
{
GimpItem *item = list->data;
gint old_offset_x;
gint old_offset_y;
gimp_item_offsets (item, &old_offset_x, &old_offset_y);
gimp_item_translate (item, offset_x, offset_y, TRUE);
if (g_list_find (resize_layers, item))
gimp_item_resize (item, context,
new_width, new_height,
offset_x + old_offset_x, offset_y + old_offset_y);
if (progress)
gimp_progress_set_value (progress, progress_current++ / progress_max);
}
g_list_free (resize_layers);
/* Reposition or remove all guides */
for (list = image->guides; list; list = g_list_next (list))
{
GimpGuide *guide = list->data;
gboolean remove_guide = FALSE;
gint new_position = gimp_guide_get_position (guide);
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 */
for (list = image->sample_points; list; list = g_list_next (list))
{
GimpSamplePoint *sample_point = list->data;
gboolean remove_sample_point = FALSE;
gint new_x = sample_point->x;
gint new_y = sample_point->y;
new_y += offset_y;
if ((sample_point->y < 0) || (sample_point->y > new_height))
remove_sample_point = TRUE;
new_x += offset_x;
if ((sample_point->x < 0) || (sample_point->x > new_width))
remove_sample_point = TRUE;
if (remove_sample_point)
gimp_image_remove_sample_point (image, sample_point, TRUE);
else if (new_x != sample_point->x || new_y != sample_point->y)
gimp_image_move_sample_point (image, sample_point,
new_x, new_y, TRUE);
}
gimp_image_undo_group_end (image);
gimp_viewable_size_changed (GIMP_VIEWABLE (image));
g_object_thaw_notify (G_OBJECT (image));
gimp_unset_busy (image->gimp);
}
void
gimp_image_resize_to_layers (GimpImage *image,
GimpContext *context,
GimpProgress *progress)
{
gint min_x, max_x, min_y, max_y;
GList *list = GIMP_LIST (image->layers)->list;
GimpItem *item;
if (!list)
return;
/* figure out starting values */
item = list->data;
min_x = item->offset_x;
min_y = item->offset_y;
max_x = item->offset_x + item->width;
max_y = item->offset_y + item->height;
/* Respect all layers */
for (list = g_list_next (list);
list;
list = g_list_next (list))
{
item = list->data;
min_x = MIN (min_x, item->offset_x);
min_y = MIN (min_y, item->offset_y);
max_x = MAX (max_x, item->offset_x + item->width);
max_y = MAX (max_y, item->offset_y + item->height);
}
gimp_image_resize (image, context,
max_x - min_x, max_y - min_y,
- min_x, - min_y,
progress);
}
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