AlderconeStudio/PIKApp
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PIKApp
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PIKApp/app/core/pikaimage-rotate.c

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/* PIKA - Photo and Image Kooker Application
* a rebranding of The GNU Image Manipulation Program (created with heckimp)
* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
*
* Original copyright, applying to most contents (license remains unchanged):
* 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 <gexiv2/gexiv2.h>
#include "core-types.h"
#include "config/pikadialogconfig.h"
#include "vectors/pikavectors.h"
#include "pika.h"
#include "pikacontainer.h"
#include "pikacontext.h"
#include "pikaguide.h"
#include "pikaimage.h"
#include "pikaimage-flip.h"
#include "pikaimage-metadata.h"
#include "pikaimage-rotate.h"
#include "pikaimage-guides.h"
#include "pikaimage-sample-points.h"
#include "pikaimage-undo.h"
#include "pikaimage-undo-push.h"
#include "pikaitem.h"
#include "pikalayer.h"
#include "pikaobjectqueue.h"
#include "pikaprogress.h"
#include "pikasamplepoint.h"
static void pika_image_rotate_item_offset (PikaImage *image,
PikaRotationType rotate_type,
PikaItem *item,
gint off_x,
gint off_y);
static void pika_image_rotate_guides (PikaImage *image,
PikaRotationType rotate_type);
static void pika_image_rotate_sample_points (PikaImage *image,
PikaRotationType rotate_type);
static void pika_image_metadata_rotate (PikaImage *image,
PikaContext *context,
GExiv2Orientation orientation,
PikaProgress *progress);
/* Public Functions */
void
pika_image_rotate (PikaImage *image,
PikaContext *context,
PikaRotationType rotate_type,
PikaProgress *progress)
{
PikaObjectQueue *queue;
PikaItem *item;
GList *list;
gdouble center_x;
gdouble center_y;
gint new_image_width;
gint new_image_height;
gint previous_image_width;
gint previous_image_height;
gint offset_x;
gint offset_y;
gboolean size_changed;
g_return_if_fail (PIKA_IS_IMAGE (image));
g_return_if_fail (PIKA_IS_CONTEXT (context));
g_return_if_fail (progress == NULL || PIKA_IS_PROGRESS (progress));
previous_image_width = pika_image_get_width (image);
previous_image_height = pika_image_get_height (image);
center_x = previous_image_width / 2.0;
center_y = previous_image_height / 2.0;
/* Resize the image (if needed) */
switch (rotate_type)
{
case PIKA_ROTATE_90:
case PIKA_ROTATE_270:
new_image_width = pika_image_get_height (image);
new_image_height = pika_image_get_width (image);
size_changed = TRUE;
offset_x = (pika_image_get_width (image) - new_image_width) / 2;
offset_y = (pika_image_get_height (image) - new_image_height) / 2;
break;
case PIKA_ROTATE_180:
new_image_width = pika_image_get_width (image);
new_image_height = pika_image_get_height (image);
size_changed = FALSE;
offset_x = 0;
offset_y = 0;
break;
default:
g_return_if_reached ();
return;
}
pika_set_busy (image->pika);
queue = pika_object_queue_new (progress);
progress = PIKA_PROGRESS (queue);
pika_object_queue_push_container (queue, pika_image_get_layers (image));
pika_object_queue_push (queue, pika_image_get_mask (image));
pika_object_queue_push_container (queue, pika_image_get_channels (image));
pika_object_queue_push_container (queue, pika_image_get_vectors (image));
g_object_freeze_notify (G_OBJECT (image));
pika_image_undo_group_start (image, PIKA_UNDO_GROUP_IMAGE_ROTATE, NULL);
/* Rotate all layers, channels (including selection mask), and vectors */
while ((item = pika_object_queue_pop (queue)))
{
gint off_x;
gint off_y;
pika_item_get_offset (item, &off_x, &off_y);
pika_item_rotate (item, context, rotate_type, center_x, center_y, FALSE);
if (PIKA_IS_LAYER (item))
{
pika_image_rotate_item_offset (image, rotate_type, item, off_x, off_y);
}
else
{
pika_item_set_offset (item, 0, 0);
if (PIKA_IS_VECTORS (item))
{
pika_item_set_size (item, new_image_width, new_image_height);
pika_item_translate (item,
(new_image_width - pika_image_get_width (image)) / 2,
(new_image_height - pika_image_get_height (image)) / 2,
FALSE);
}
}
pika_progress_set_value (progress, 1.0);
}
/* Rotate all Guides */
pika_image_rotate_guides (image, rotate_type);
/* Rotate all sample points */
pika_image_rotate_sample_points (image, rotate_type);
/* Resize the image (if needed) */
if (size_changed)
{
gdouble xres;
gdouble yres;
pika_image_undo_push_image_size (image,
NULL,
offset_x,
offset_y,
new_image_width,
new_image_height);
g_object_set (image,
"width", new_image_width,
"height", new_image_height,
NULL);
pika_image_get_resolution (image, &xres, &yres);
if (xres != yres)
pika_image_set_resolution (image, yres, xres);
}
/* Notify guide movements */
for (list = pika_image_get_guides (image);
list;
list = g_list_next (list))
{
pika_image_guide_moved (image, list->data);
}
/* Notify sample point movements */
for (list = pika_image_get_sample_points (image);
list;
list = g_list_next (list))
{
pika_image_sample_point_moved (image, list->data);
}
pika_image_undo_group_end (image);
g_object_unref (queue);
if (size_changed)
pika_image_size_changed_detailed (image,
-offset_x,
-offset_y,
previous_image_width,
previous_image_height);
g_object_thaw_notify (G_OBJECT (image));
pika_unset_busy (image->pika);
}
void
pika_image_import_rotation_metadata (PikaImage *image,
PikaContext *context,
PikaProgress *progress,
gboolean interactive)
{
PikaMetadata *metadata;
g_return_if_fail (PIKA_IS_IMAGE (image));
g_return_if_fail (PIKA_IS_CONTEXT (context));
g_return_if_fail (progress == NULL || PIKA_IS_PROGRESS (progress));
metadata = pika_image_get_metadata (image);
if (metadata)
{
PikaMetadataRotationPolicy policy;
policy = PIKA_DIALOG_CONFIG (image->pika->config)->metadata_rotation_policy;
if (policy == PIKA_METADATA_ROTATION_POLICY_ASK)
{
if (interactive)
{
gboolean dont_ask = FALSE;
policy = pika_query_rotation_policy (image->pika, image,
context, &dont_ask);
if (dont_ask)
{
g_object_set (G_OBJECT (image->pika->config),
"metadata-rotation-policy", policy,
NULL);
}
}
else
{
policy = PIKA_METADATA_ROTATION_POLICY_ROTATE;
}
}
if (policy == PIKA_METADATA_ROTATION_POLICY_ROTATE)
pika_image_metadata_rotate (image, context,
gexiv2_metadata_try_get_orientation (GEXIV2_METADATA (metadata), NULL),
progress);
gexiv2_metadata_try_set_orientation (GEXIV2_METADATA (metadata),
GEXIV2_ORIENTATION_NORMAL,
NULL);
}
}
void
pika_image_apply_metadata_orientation (PikaImage *image,
PikaContext *context,
PikaMetadata *metadata,
PikaProgress *progress)
{
pika_image_metadata_rotate (image, context,
gexiv2_metadata_try_get_orientation (GEXIV2_METADATA (metadata), NULL),
progress);
}
/* Private Functions */
static void
pika_image_rotate_item_offset (PikaImage *image,
PikaRotationType rotate_type,
PikaItem *item,
gint off_x,
gint off_y)
{
gint x = 0;
gint y = 0;
switch (rotate_type)
{
case PIKA_ROTATE_90:
x = pika_image_get_height (image) - off_y - pika_item_get_width (item);
y = off_x;
break;
case PIKA_ROTATE_270:
x = off_y;
y = pika_image_get_width (image) - off_x - pika_item_get_height (item);
break;
case PIKA_ROTATE_180:
return;
default:
g_return_if_reached ();
}
pika_item_get_offset (item, &off_x, &off_y);
x -= off_x;
y -= off_y;
if (x || y)
pika_item_translate (item, x, y, FALSE);
}
static void
pika_image_rotate_guides (PikaImage *image,
PikaRotationType rotate_type)
{
GList *list;
/* Rotate all Guides */
for (list = pika_image_get_guides (image);
list;
list = g_list_next (list))
{
PikaGuide *guide = list->data;
PikaOrientationType orientation = pika_guide_get_orientation (guide);
gint position = pika_guide_get_position (guide);
switch (rotate_type)
{
case PIKA_ROTATE_90:
switch (orientation)
{
case PIKA_ORIENTATION_HORIZONTAL:
pika_image_undo_push_guide (image, NULL, guide);
pika_guide_set_orientation (guide, PIKA_ORIENTATION_VERTICAL);
pika_guide_set_position (guide,
pika_image_get_height (image) - position);
break;
case PIKA_ORIENTATION_VERTICAL:
pika_image_undo_push_guide (image, NULL, guide);
pika_guide_set_orientation (guide, PIKA_ORIENTATION_HORIZONTAL);
break;
default:
break;
}
break;
case PIKA_ROTATE_180:
switch (orientation)
{
case PIKA_ORIENTATION_HORIZONTAL:
pika_image_move_guide (image, guide,
pika_image_get_height (image) - position,
TRUE);
break;
case PIKA_ORIENTATION_VERTICAL:
pika_image_move_guide (image, guide,
pika_image_get_width (image) - position,
TRUE);
break;
default:
break;
}
break;
case PIKA_ROTATE_270:
switch (orientation)
{
case PIKA_ORIENTATION_HORIZONTAL:
pika_image_undo_push_guide (image, NULL, guide);
pika_guide_set_orientation (guide, PIKA_ORIENTATION_VERTICAL);
break;
case PIKA_ORIENTATION_VERTICAL:
pika_image_undo_push_guide (image, NULL, guide);
pika_guide_set_orientation (guide, PIKA_ORIENTATION_HORIZONTAL);
pika_guide_set_position (guide,
pika_image_get_width (image) - position);
break;
default:
break;
}
break;
}
}
}
static void
pika_image_rotate_sample_points (PikaImage *image,
PikaRotationType rotate_type)
{
GList *list;
/* Rotate all sample points */
for (list = pika_image_get_sample_points (image);
list;
list = g_list_next (list))
{
PikaSamplePoint *sample_point = list->data;
gint old_x;
gint old_y;
pika_image_undo_push_sample_point (image, NULL, sample_point);
pika_sample_point_get_position (sample_point, &old_x, &old_y);
switch (rotate_type)
{
case PIKA_ROTATE_90:
pika_sample_point_set_position (sample_point,
pika_image_get_height (image) - old_y,
old_x);
break;
case PIKA_ROTATE_180:
pika_sample_point_set_position (sample_point,
pika_image_get_width (image) - old_x,
pika_image_get_height (image) - old_y);
break;
case PIKA_ROTATE_270:
pika_sample_point_set_position (sample_point,
old_y,
pika_image_get_width (image) - old_x);
break;
}
}
}
static void
pika_image_metadata_rotate (PikaImage *image,
PikaContext *context,
GExiv2Orientation orientation,
PikaProgress *progress)
{
switch (orientation)
{
case GEXIV2_ORIENTATION_UNSPECIFIED:
case GEXIV2_ORIENTATION_NORMAL: /* standard orientation, do nothing */
break;
case GEXIV2_ORIENTATION_HFLIP:
pika_image_flip (image, context, PIKA_ORIENTATION_HORIZONTAL, progress);
break;
case GEXIV2_ORIENTATION_ROT_180:
pika_image_rotate (image, context, PIKA_ROTATE_180, progress);
break;
case GEXIV2_ORIENTATION_VFLIP:
pika_image_flip (image, context, PIKA_ORIENTATION_VERTICAL, progress);
break;
case GEXIV2_ORIENTATION_ROT_90_HFLIP: /* flipped diagonally around '\' */
pika_image_rotate (image, context, PIKA_ROTATE_90, progress);
pika_image_flip (image, context, PIKA_ORIENTATION_HORIZONTAL, progress);
break;
case GEXIV2_ORIENTATION_ROT_90: /* 90 CW */
pika_image_rotate (image, context, PIKA_ROTATE_90, progress);
break;
case GEXIV2_ORIENTATION_ROT_90_VFLIP: /* flipped diagonally around '/' */
pika_image_rotate (image, context, PIKA_ROTATE_90, progress);
pika_image_flip (image, context, PIKA_ORIENTATION_VERTICAL, progress);
break;
case GEXIV2_ORIENTATION_ROT_270: /* 90 CCW */
pika_image_rotate (image, context, PIKA_ROTATE_270, progress);
break;
default: /* shouldn't happen */
break;
}
}
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