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gimp/app/core/gimpimage-rotate.c
Jehan 77a30bfd28 app, libgimp: core loads thumbnail from metadata if no GimpThumbnailProcedure… 
… is set.

The order for thumbnail creation in gimp_imagefile_create_thumbnail() is now:

1. If there is a GimpThumbnailProcedure, it is run first.
2. Otherwise we check if a thumbnail is in the metadata.
3. As last resort, we just load the full image.

Part of the fix was to copy gimp_image_metadata_load_thumbnail() into the core
code. I have been wondering if we could not drop the same function from libgimp
and remove the GimpThumbnailProcedure frome file-jpeg, since it just uses the
metadata thumbnail and it is the only plug-in using this code.
Also it is much faster to run this in core and it's generic function which makes
thumbnail loading from Exif data working for every format supported by Exiv2.

On the other hand, the file-jpeg thumbnail procedure also gathers a few more
useful information, such as the color model (in a reliably manner, since based
on JPEG header, unlike from metadata which may be wrong).
2023-10-01 21:02:33 +02:00

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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 <gexiv2/gexiv2.h>
#include "core-types.h"
#include "config/gimpdialogconfig.h"
#include "vectors/gimpvectors.h"
#include "gimp.h"
#include "gimpcontainer.h"
#include "gimpcontext.h"
#include "gimpguide.h"
#include "gimpimage.h"
#include "gimpimage-flip.h"
#include "gimpimage-metadata.h"
#include "gimpimage-rotate.h"
#include "gimpimage-guides.h"
#include "gimpimage-sample-points.h"
#include "gimpimage-undo.h"
#include "gimpimage-undo-push.h"
#include "gimpitem.h"
#include "gimplayer.h"
#include "gimpobjectqueue.h"
#include "gimpprogress.h"
#include "gimpsamplepoint.h"
static void gimp_image_rotate_item_offset (GimpImage *image,
GimpRotationType rotate_type,
GimpItem *item,
gint off_x,
gint off_y);
static void gimp_image_rotate_guides (GimpImage *image,
GimpRotationType rotate_type);
static void gimp_image_rotate_sample_points (GimpImage *image,
GimpRotationType rotate_type);
static void gimp_image_metadata_rotate (GimpImage *image,
GimpContext *context,
GExiv2Orientation orientation,
GimpProgress *progress);
/* Public Functions */
void
gimp_image_rotate (GimpImage *image,
GimpContext *context,
GimpRotationType rotate_type,
GimpProgress *progress)
{
GimpObjectQueue *queue;
GimpItem *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 (GIMP_IS_IMAGE (image));
g_return_if_fail (GIMP_IS_CONTEXT (context));
g_return_if_fail (progress == NULL || GIMP_IS_PROGRESS (progress));
previous_image_width = gimp_image_get_width (image);
previous_image_height = gimp_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 GIMP_ROTATE_90:
case GIMP_ROTATE_270:
new_image_width = gimp_image_get_height (image);
new_image_height = gimp_image_get_width (image);
size_changed = TRUE;
offset_x = (gimp_image_get_width (image) - new_image_width) / 2;
offset_y = (gimp_image_get_height (image) - new_image_height) / 2;
break;
case GIMP_ROTATE_180:
new_image_width = gimp_image_get_width (image);
new_image_height = gimp_image_get_height (image);
size_changed = FALSE;
offset_x = 0;
offset_y = 0;
break;
default:
g_return_if_reached ();
return;
}
gimp_set_busy (image->gimp);
queue = gimp_object_queue_new (progress);
progress = GIMP_PROGRESS (queue);
gimp_object_queue_push_container (queue, gimp_image_get_layers (image));
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));
g_object_freeze_notify (G_OBJECT (image));
gimp_image_undo_group_start (image, GIMP_UNDO_GROUP_IMAGE_ROTATE, NULL);
/* Rotate all layers, channels (including selection mask), and vectors */
while ((item = gimp_object_queue_pop (queue)))
{
gint off_x;
gint off_y;
gimp_item_get_offset (item, &off_x, &off_y);
gimp_item_rotate (item, context, rotate_type, center_x, center_y, FALSE);
if (GIMP_IS_LAYER (item))
{
gimp_image_rotate_item_offset (image, rotate_type, item, off_x, off_y);
}
else
{
gimp_item_set_offset (item, 0, 0);
if (GIMP_IS_VECTORS (item))
{
gimp_item_set_size (item, new_image_width, new_image_height);
gimp_item_translate (item,
(new_image_width - gimp_image_get_width (image)) / 2,
(new_image_height - gimp_image_get_height (image)) / 2,
FALSE);
}
}
gimp_progress_set_value (progress, 1.0);
}
/* Rotate all Guides */
gimp_image_rotate_guides (image, rotate_type);
/* Rotate all sample points */
gimp_image_rotate_sample_points (image, rotate_type);
/* Resize the image (if needed) */
if (size_changed)
{
gdouble xres;
gdouble yres;
gimp_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);
gimp_image_get_resolution (image, &xres, &yres);
if (xres != yres)
gimp_image_set_resolution (image, yres, xres);
}
/* Notify guide movements */
for (list = gimp_image_get_guides (image);
list;
list = g_list_next (list))
{
gimp_image_guide_moved (image, list->data);
}
/* Notify sample point movements */
for (list = gimp_image_get_sample_points (image);
list;
list = g_list_next (list))
{
gimp_image_sample_point_moved (image, list->data);
}
gimp_image_undo_group_end (image);
g_object_unref (queue);
if (size_changed)
gimp_image_size_changed_detailed (image,
-offset_x,
-offset_y,
previous_image_width,
previous_image_height);
g_object_thaw_notify (G_OBJECT (image));
gimp_unset_busy (image->gimp);
}
void
gimp_image_import_rotation_metadata (GimpImage *image,
GimpContext *context,
GimpProgress *progress,
gboolean interactive)
{
GimpMetadata *metadata;
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));
metadata = gimp_image_get_metadata (image);
if (metadata)
{
GimpMetadataRotationPolicy policy;
policy = GIMP_DIALOG_CONFIG (image->gimp->config)->metadata_rotation_policy;
if (policy == GIMP_METADATA_ROTATION_POLICY_ASK)
{
if (interactive)
{
gboolean dont_ask = FALSE;
policy = gimp_query_rotation_policy (image->gimp, image,
context, &dont_ask);
if (dont_ask)
{
g_object_set (G_OBJECT (image->gimp->config),
"metadata-rotation-policy", policy,
NULL);
}
}
else
{
policy = GIMP_METADATA_ROTATION_POLICY_ROTATE;
}
}
if (policy == GIMP_METADATA_ROTATION_POLICY_ROTATE)
gimp_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
gimp_image_apply_metadata_orientation (GimpImage *image,
GimpContext *context,
GimpMetadata *metadata,
GimpProgress *progress)
{
gimp_image_metadata_rotate (image, context,
gexiv2_metadata_try_get_orientation (GEXIV2_METADATA (metadata), NULL),
progress);
}
/* Private Functions */
static void
gimp_image_rotate_item_offset (GimpImage *image,
GimpRotationType rotate_type,
GimpItem *item,
gint off_x,
gint off_y)
{
gint x = 0;
gint y = 0;
switch (rotate_type)
{
case GIMP_ROTATE_90:
x = gimp_image_get_height (image) - off_y - gimp_item_get_width (item);
y = off_x;
break;
case GIMP_ROTATE_270:
x = off_y;
y = gimp_image_get_width (image) - off_x - gimp_item_get_height (item);
break;
case GIMP_ROTATE_180:
return;
default:
g_return_if_reached ();
}
gimp_item_get_offset (item, &off_x, &off_y);
x -= off_x;
y -= off_y;
if (x || y)
gimp_item_translate (item, x, y, FALSE);
}
static void
gimp_image_rotate_guides (GimpImage *image,
GimpRotationType rotate_type)
{
GList *list;
/* Rotate all Guides */
for (list = gimp_image_get_guides (image);
list;
list = g_list_next (list))
{
GimpGuide *guide = list->data;
GimpOrientationType orientation = gimp_guide_get_orientation (guide);
gint position = gimp_guide_get_position (guide);
switch (rotate_type)
{
case GIMP_ROTATE_90:
switch (orientation)
{
case GIMP_ORIENTATION_HORIZONTAL:
gimp_image_undo_push_guide (image, NULL, guide);
gimp_guide_set_orientation (guide, GIMP_ORIENTATION_VERTICAL);
gimp_guide_set_position (guide,
gimp_image_get_height (image) - position);
break;
case GIMP_ORIENTATION_VERTICAL:
gimp_image_undo_push_guide (image, NULL, guide);
gimp_guide_set_orientation (guide, GIMP_ORIENTATION_HORIZONTAL);
break;
default:
break;
}
break;
case GIMP_ROTATE_180:
switch (orientation)
{
case GIMP_ORIENTATION_HORIZONTAL:
gimp_image_move_guide (image, guide,
gimp_image_get_height (image) - position,
TRUE);
break;
case GIMP_ORIENTATION_VERTICAL:
gimp_image_move_guide (image, guide,
gimp_image_get_width (image) - position,
TRUE);
break;
default:
break;
}
break;
case GIMP_ROTATE_270:
switch (orientation)
{
case GIMP_ORIENTATION_HORIZONTAL:
gimp_image_undo_push_guide (image, NULL, guide);
gimp_guide_set_orientation (guide, GIMP_ORIENTATION_VERTICAL);
break;
case GIMP_ORIENTATION_VERTICAL:
gimp_image_undo_push_guide (image, NULL, guide);
gimp_guide_set_orientation (guide, GIMP_ORIENTATION_HORIZONTAL);
gimp_guide_set_position (guide,
gimp_image_get_width (image) - position);
break;
default:
break;
}
break;
}
}
}
static void
gimp_image_rotate_sample_points (GimpImage *image,
GimpRotationType rotate_type)
{
GList *list;
/* Rotate all sample points */
for (list = gimp_image_get_sample_points (image);
list;
list = g_list_next (list))
{
GimpSamplePoint *sample_point = list->data;
gint old_x;
gint old_y;
gimp_image_undo_push_sample_point (image, NULL, sample_point);
gimp_sample_point_get_position (sample_point, &old_x, &old_y);
switch (rotate_type)
{
case GIMP_ROTATE_90:
gimp_sample_point_set_position (sample_point,
gimp_image_get_height (image) - old_y,
old_x);
break;
case GIMP_ROTATE_180:
gimp_sample_point_set_position (sample_point,
gimp_image_get_width (image) - old_x,
gimp_image_get_height (image) - old_y);
break;
case GIMP_ROTATE_270:
gimp_sample_point_set_position (sample_point,
old_y,
gimp_image_get_width (image) - old_x);
break;
}
}
}
static void
gimp_image_metadata_rotate (GimpImage *image,
GimpContext *context,
GExiv2Orientation orientation,
GimpProgress *progress)
{
switch (orientation)
{
case GEXIV2_ORIENTATION_UNSPECIFIED:
case GEXIV2_ORIENTATION_NORMAL: /* standard orientation, do nothing */
break;
case GEXIV2_ORIENTATION_HFLIP:
gimp_image_flip (image, context, GIMP_ORIENTATION_HORIZONTAL, progress);
break;
case GEXIV2_ORIENTATION_ROT_180:
gimp_image_rotate (image, context, GIMP_ROTATE_180, progress);
break;
case GEXIV2_ORIENTATION_VFLIP:
gimp_image_flip (image, context, GIMP_ORIENTATION_VERTICAL, progress);
break;
case GEXIV2_ORIENTATION_ROT_90_HFLIP: /* flipped diagonally around '\' */
gimp_image_rotate (image, context, GIMP_ROTATE_90, progress);
gimp_image_flip (image, context, GIMP_ORIENTATION_HORIZONTAL, progress);
break;
case GEXIV2_ORIENTATION_ROT_90: /* 90 CW */
gimp_image_rotate (image, context, GIMP_ROTATE_90, progress);
break;
case GEXIV2_ORIENTATION_ROT_90_VFLIP: /* flipped diagonally around '/' */
gimp_image_rotate (image, context, GIMP_ROTATE_90, progress);
gimp_image_flip (image, context, GIMP_ORIENTATION_VERTICAL, progress);
break;
case GEXIV2_ORIENTATION_ROT_270: /* 90 CCW */
gimp_image_rotate (image, context, GIMP_ROTATE_270, progress);
break;
default: /* shouldn't happen */
break;
}
}
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