281 lines
8.1 KiB
C
281 lines
8.1 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 "libpikamath/pikamath.h"
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#include "core-types.h"
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#include "pika.h"
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#include "pikachannel.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-flip.h"
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#include "pikaimage-guides.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 "pikaitem.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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/* local function prototypes */
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static void pika_image_flip_guides (PikaImage *image,
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PikaOrientationType flip_type,
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gdouble axis);
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static void pika_image_flip_sample_points (PikaImage *image,
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PikaOrientationType flip_type,
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gdouble axis);
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/* private functions */
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static void
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pika_image_flip_guides (PikaImage *image,
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PikaOrientationType flip_type,
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gdouble axis)
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{
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gint width = pika_image_get_width (image);
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gint height = pika_image_get_height (image);
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GList *iter;
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for (iter = pika_image_get_guides (image); iter;)
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{
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PikaGuide *guide = iter->data;
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gint position = pika_guide_get_position (guide);
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iter = g_list_next (iter);
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position = SIGNED_ROUND (2.0 * axis - position);
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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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if (flip_type == PIKA_ORIENTATION_VERTICAL)
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{
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if (position >= 0 && position <= height)
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pika_image_move_guide (image, guide, position, TRUE);
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else
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pika_image_remove_guide (image, guide, TRUE);
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}
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break;
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case PIKA_ORIENTATION_VERTICAL:
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if (flip_type == PIKA_ORIENTATION_HORIZONTAL)
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{
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if (position >= 0 && position <= width)
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pika_image_move_guide (image, guide, position, TRUE);
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else
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pika_image_remove_guide (image, guide, TRUE);
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}
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break;
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case PIKA_ORIENTATION_UNKNOWN:
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g_return_if_reached ();
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}
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}
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}
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static void
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pika_image_flip_sample_points (PikaImage *image,
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PikaOrientationType flip_type,
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gdouble axis)
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{
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gint width = pika_image_get_width (image);
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gint height = pika_image_get_height (image);
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GList *iter;
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for (iter = pika_image_get_sample_points (image); iter;)
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{
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PikaSamplePoint *sample_point = iter->data;
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gint x;
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gint y;
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iter = g_list_next (iter);
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pika_sample_point_get_position (sample_point, &x, &y);
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switch (flip_type)
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{
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case PIKA_ORIENTATION_HORIZONTAL:
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x = SIGNED_ROUND (2.0 * axis - x);
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break;
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case PIKA_ORIENTATION_VERTICAL:
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y = SIGNED_ROUND (2.0 * axis - y);
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break;
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case PIKA_ORIENTATION_UNKNOWN:
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g_return_if_reached ();
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}
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if (x >= 0 && x < width &&
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y >= 0 && y < height)
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{
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pika_image_move_sample_point (image, sample_point, x, y, TRUE);
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}
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else
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{
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pika_image_remove_sample_point (image, sample_point, TRUE);
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}
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}
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}
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/* public functions */
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void
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pika_image_flip (PikaImage *image,
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PikaContext *context,
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PikaOrientationType flip_type,
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PikaProgress *progress)
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{
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gdouble axis = 0.0;
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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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switch (flip_type)
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{
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case PIKA_ORIENTATION_HORIZONTAL:
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axis = pika_image_get_width (image) / 2.0;
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break;
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case PIKA_ORIENTATION_VERTICAL:
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axis = pika_image_get_height (image) / 2.0;
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break;
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case PIKA_ORIENTATION_UNKNOWN:
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g_return_if_reached ();
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}
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pika_image_flip_full (image, context, flip_type, axis,
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PIKA_TRANSFORM_RESIZE_CLIP, progress);
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}
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void
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pika_image_flip_full (PikaImage *image,
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PikaContext *context,
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PikaOrientationType flip_type,
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gdouble axis,
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gboolean clip_result,
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PikaProgress *progress)
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{
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PikaObjectQueue *queue;
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PikaItem *item;
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gint width;
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gint height;
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gint offset_x = 0;
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gint offset_y = 0;
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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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width = pika_image_get_width (image);
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height = pika_image_get_height (image);
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if (! clip_result)
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{
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switch (flip_type)
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{
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case PIKA_ORIENTATION_HORIZONTAL:
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offset_x = SIGNED_ROUND (2.0 * axis - width);
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axis = width / 2.0;
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break;
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case PIKA_ORIENTATION_VERTICAL:
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offset_y = SIGNED_ROUND (2.0 * axis - height);
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axis = height / 2.0;
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break;
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case PIKA_ORIENTATION_UNKNOWN:
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g_return_if_reached ();
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}
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}
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pika_set_busy (image->pika);
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queue = pika_object_queue_new (progress);
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progress = PIKA_PROGRESS (queue);
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pika_object_queue_push_container (queue, pika_image_get_layers (image));
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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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pika_image_undo_group_start (image, PIKA_UNDO_GROUP_IMAGE_FLIP, NULL);
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/* Flip all layers, channels (including selection mask), and vectors */
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while ((item = pika_object_queue_pop (queue)))
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{
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gboolean clip = FALSE;
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if (PIKA_IS_CHANNEL (item))
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clip = clip_result;
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pika_item_flip (item, context, flip_type, axis, clip);
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pika_progress_set_value (progress, 1.0);
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}
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/* Flip all Guides */
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pika_image_flip_guides (image, flip_type, axis);
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/* Flip all sample points */
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pika_image_flip_sample_points (image, flip_type, axis);
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if (offset_x || offset_y)
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{
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pika_image_undo_push_image_size (image,
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NULL,
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offset_x,
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offset_y,
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width,
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height);
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}
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pika_image_undo_group_end (image);
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g_object_unref (queue);
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if (offset_x || offset_y)
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{
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pika_image_size_changed_detailed (image,
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-offset_x,
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-offset_y,
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width,
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height);
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}
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pika_unset_busy (image->pika);
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}
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