332 lines
10 KiB
C
332 lines
10 KiB
C
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/* PIKA - Photo and Image Kooker Application
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* a rebranding of The GNU Image Manipulation Program (created with heckimp)
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* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
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*
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* Original copyright, applying to most contents (license remains unchanged):
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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 <https://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <gdk-pixbuf/gdk-pixbuf.h>
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#include <gegl.h>
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#include "libpikabase/pikabase.h"
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#include "core-types.h"
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#include "pika.h"
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#include "pikacontainer.h"
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#include "pikacontext.h"
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#include "pikaguide.h"
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#include "pikaimage.h"
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#include "pikaimage-guides.h"
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#include "pikaimage-item-list.h"
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#include "pikaimage-resize.h"
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#include "pikaimage-sample-points.h"
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#include "pikaimage-undo.h"
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#include "pikaimage-undo-push.h"
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#include "pikalayer.h"
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#include "pikaobjectqueue.h"
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#include "pikaprogress.h"
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#include "pikasamplepoint.h"
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#include "text/pikatextlayer.h"
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#include "pika-intl.h"
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void
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pika_image_resize (PikaImage *image,
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PikaContext *context,
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gint new_width,
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gint new_height,
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gint offset_x,
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gint offset_y,
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PikaProgress *progress)
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{
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pika_image_resize_with_layers (image, context, PIKA_FILL_TRANSPARENT,
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new_width, new_height, offset_x, offset_y,
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PIKA_ITEM_SET_NONE, TRUE,
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progress);
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}
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void
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pika_image_resize_with_layers (PikaImage *image,
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PikaContext *context,
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PikaFillType fill_type,
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gint new_width,
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gint new_height,
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gint offset_x,
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gint offset_y,
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PikaItemSet layer_set,
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gboolean resize_text_layers,
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PikaProgress *progress)
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{
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PikaObjectQueue *queue;
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GList *resize_layers;
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GList *list;
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PikaItem *item;
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gint old_width, old_height;
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g_return_if_fail (PIKA_IS_IMAGE (image));
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g_return_if_fail (PIKA_IS_CONTEXT (context));
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g_return_if_fail (new_width > 0 && new_height > 0);
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g_return_if_fail (progress == NULL || PIKA_IS_PROGRESS (progress));
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pika_set_busy (image->pika);
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g_object_freeze_notify (G_OBJECT (image));
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pika_image_undo_group_start (image, PIKA_UNDO_GROUP_IMAGE_RESIZE,
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C_("undo-type", "Resize Image"));
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resize_layers = pika_image_item_list_get_list (image,
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PIKA_ITEM_TYPE_LAYERS,
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layer_set);
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old_width = pika_image_get_width (image);
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old_height = pika_image_get_height (image);
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/* Push the image size to the stack */
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pika_image_undo_push_image_size (image, NULL,
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-offset_x, -offset_y,
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new_width, new_height);
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/* Set the new width and height */
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g_object_set (image,
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"width", new_width,
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"height", new_height,
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NULL);
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/* Reposition all layers */
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for (list = pika_image_get_layer_iter (image);
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list;
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list = g_list_next (list))
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{
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PikaItem *item = list->data;
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pika_item_translate (item, offset_x, offset_y, TRUE);
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}
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queue = pika_object_queue_new (progress);
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progress = PIKA_PROGRESS (queue);
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for (list = resize_layers; list; list = g_list_next (list))
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{
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PikaItem *item = list->data;
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/* group layers can't be resized here */
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if (pika_viewable_get_children (PIKA_VIEWABLE (item)))
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continue;
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if (! resize_text_layers && pika_item_is_text_layer (item))
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continue;
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/* note that we call pika_item_start_move(), and not
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* pika_item_start_transform(). see the comment in pika_item_resize()
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* for more information.
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*/
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pika_item_start_move (item, TRUE);
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pika_object_queue_push (queue, item);
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}
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g_list_free (resize_layers);
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pika_object_queue_push (queue, pika_image_get_mask (image));
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pika_object_queue_push_container (queue, pika_image_get_channels (image));
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pika_object_queue_push_container (queue, pika_image_get_vectors (image));
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/* Resize all resize_layers, channels (including selection mask), and
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* vectors
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*/
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while ((item = pika_object_queue_pop (queue)))
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{
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if (PIKA_IS_LAYER (item))
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{
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gint old_offset_x;
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gint old_offset_y;
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pika_item_get_offset (item, &old_offset_x, &old_offset_y);
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pika_item_resize (item, context, fill_type,
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new_width, new_height,
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old_offset_x, old_offset_y);
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pika_item_end_move (item, TRUE);
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}
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else
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{
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pika_item_resize (item, context, PIKA_FILL_TRANSPARENT,
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new_width, new_height, offset_x, offset_y);
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}
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}
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/* Reposition or remove all guides */
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list = pika_image_get_guides (image);
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while (list)
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{
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PikaGuide *guide = list->data;
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gboolean remove_guide = FALSE;
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gint new_position = pika_guide_get_position (guide);
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list = g_list_next (list);
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switch (pika_guide_get_orientation (guide))
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{
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case PIKA_ORIENTATION_HORIZONTAL:
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new_position += offset_y;
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if (new_position < 0 || new_position > new_height)
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remove_guide = TRUE;
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break;
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case PIKA_ORIENTATION_VERTICAL:
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new_position += offset_x;
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if (new_position < 0 || new_position > new_width)
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remove_guide = TRUE;
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break;
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default:
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break;
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}
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if (remove_guide)
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pika_image_remove_guide (image, guide, TRUE);
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else if (new_position != pika_guide_get_position (guide))
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pika_image_move_guide (image, guide, new_position, TRUE);
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}
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/* Reposition or remove sample points */
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list = pika_image_get_sample_points (image);
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while (list)
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{
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PikaSamplePoint *sample_point = list->data;
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gboolean remove_sample_point = FALSE;
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gint old_x;
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gint old_y;
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gint new_x;
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gint new_y;
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list = g_list_next (list);
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pika_sample_point_get_position (sample_point, &old_x, &old_y);
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new_y = old_y + offset_y;
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if ((new_y < 0) || (new_y >= new_height))
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remove_sample_point = TRUE;
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new_x = old_x + offset_x;
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if ((new_x < 0) || (new_x >= new_width))
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remove_sample_point = TRUE;
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if (remove_sample_point)
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pika_image_remove_sample_point (image, sample_point, TRUE);
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else if (new_x != old_x || new_y != old_y)
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pika_image_move_sample_point (image, sample_point,
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new_x, new_y, TRUE);
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}
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g_object_unref (queue);
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pika_image_undo_group_end (image);
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pika_image_size_changed_detailed (image,
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offset_x, offset_y,
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old_width, old_height);
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g_object_thaw_notify (G_OBJECT (image));
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pika_unset_busy (image->pika);
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}
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void
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pika_image_resize_to_layers (PikaImage *image,
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PikaContext *context,
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gint *offset_x,
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gint *offset_y,
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gint *new_width,
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gint *new_height,
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PikaProgress *progress)
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{
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GList *list;
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PikaItem *item;
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gint x, y;
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gint width, height;
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g_return_if_fail (PIKA_IS_IMAGE (image));
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g_return_if_fail (PIKA_IS_CONTEXT (context));
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g_return_if_fail (progress == NULL || PIKA_IS_PROGRESS (progress));
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list = pika_image_get_layer_iter (image);
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if (! list)
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return;
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/* figure out starting values */
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item = list->data;
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x = pika_item_get_offset_x (item);
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y = pika_item_get_offset_y (item);
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width = pika_item_get_width (item);
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height = pika_item_get_height (item);
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/* Respect all layers */
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for (list = g_list_next (list); list; list = g_list_next (list))
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{
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item = list->data;
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pika_rectangle_union (x, y,
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width, height,
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pika_item_get_offset_x (item),
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pika_item_get_offset_y (item),
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pika_item_get_width (item),
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pika_item_get_height (item),
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&x, &y,
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&width, &height);
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}
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pika_image_resize (image, context,
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width, height, -x, -y,
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progress);
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if (offset_x)
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*offset_x = -x;
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if (offset_y)
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*offset_y = -y;
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if (new_width)
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*new_width = width;
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if (new_height)
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*new_height = height;
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}
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void
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pika_image_resize_to_selection (PikaImage *image,
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PikaContext *context,
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PikaProgress *progress)
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{
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PikaChannel *selection = pika_image_get_mask (image);
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gint x, y, w, h;
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if (pika_item_bounds (PIKA_ITEM (selection), &x, &y, &w, &h))
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{
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pika_image_resize (image, context,
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w, h, -x, -y,
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progress);
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}
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}
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