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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 "libgimpmath/gimpmath.h"
#include "core-types.h"
#include "gimp.h"
#include "gimpchannel.h"
#include "gimpcontainer.h"
#include "gimpcontext.h"
#include "gimpguide.h"
#include "gimpimage.h"
#include "gimpimage-flip.h"
#include "gimpimage-guides.h"
#include "gimpimage-sample-points.h"
#include "gimpimage-undo.h"
#include "gimpimage-undo-push.h"
#include "gimpitem.h"
#include "gimpobjectqueue.h"
#include "gimpprogress.h"
#include "gimpsamplepoint.h"
/* local function prototypes */
static void gimp_image_flip_guides (GimpImage *image,
GimpOrientationType flip_type,
gdouble axis);
static void gimp_image_flip_sample_points (GimpImage *image,
GimpOrientationType flip_type,
gdouble axis);
/* private functions */
static void
gimp_image_flip_guides (GimpImage *image,
GimpOrientationType flip_type,
gdouble axis)
{
gint width = gimp_image_get_width (image);
gint height = gimp_image_get_height (image);
GList *iter;
for (iter = gimp_image_get_guides (image); iter;)
{
GimpGuide *guide = iter->data;
gint position = gimp_guide_get_position (guide);
iter = g_list_next (iter);
position = SIGNED_ROUND (2.0 * axis - position);
switch (gimp_guide_get_orientation (guide))
{
case GIMP_ORIENTATION_HORIZONTAL:
if (flip_type == GIMP_ORIENTATION_VERTICAL)
{
if (position >= 0 && position <= height)
gimp_image_move_guide (image, guide, position, TRUE);
else
gimp_image_remove_guide (image, guide, TRUE);
}
break;
case GIMP_ORIENTATION_VERTICAL:
if (flip_type == GIMP_ORIENTATION_HORIZONTAL)
{
if (position >= 0 && position <= width)
gimp_image_move_guide (image, guide, position, TRUE);
else
gimp_image_remove_guide (image, guide, TRUE);
}
break;
case GIMP_ORIENTATION_UNKNOWN:
g_return_if_reached ();
}
}
}
static void
gimp_image_flip_sample_points (GimpImage *image,
GimpOrientationType flip_type,
gdouble axis)
{
gint width = gimp_image_get_width (image);
gint height = gimp_image_get_height (image);
GList *iter;
for (iter = gimp_image_get_sample_points (image); iter;)
{
GimpSamplePoint *sample_point = iter->data;
gint x;
gint y;
iter = g_list_next (iter);
gimp_sample_point_get_position (sample_point, &x, &y);
switch (flip_type)
{
case GIMP_ORIENTATION_HORIZONTAL:
x = SIGNED_ROUND (2.0 * axis - x);
break;
case GIMP_ORIENTATION_VERTICAL:
y = SIGNED_ROUND (2.0 * axis - y);
break;
case GIMP_ORIENTATION_UNKNOWN:
g_return_if_reached ();
}
if (x >= 0 && x < width &&
y >= 0 && y < height)
{
gimp_image_move_sample_point (image, sample_point, x, y, TRUE);
}
else
{
gimp_image_remove_sample_point (image, sample_point, TRUE);
}
}
}
/* public functions */
void
gimp_image_flip (GimpImage *image,
GimpContext *context,
GimpOrientationType flip_type,
GimpProgress *progress)
{
gdouble axis = 0.0;
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));
switch (flip_type)
{
case GIMP_ORIENTATION_HORIZONTAL:
axis = gimp_image_get_width (image) / 2.0;
break;
case GIMP_ORIENTATION_VERTICAL:
axis = gimp_image_get_height (image) / 2.0;
break;
case GIMP_ORIENTATION_UNKNOWN:
g_return_if_reached ();
}
gimp_image_flip_full (image, context, flip_type, axis,
GIMP_TRANSFORM_RESIZE_CLIP, progress);
}
void
gimp_image_flip_full (GimpImage *image,
GimpContext *context,
GimpOrientationType flip_type,
gdouble axis,
gboolean clip_result,
GimpProgress *progress)
{
GimpObjectQueue *queue;
GimpItem *item;
gint width;
gint height;
gint offset_x = 0;
gint offset_y = 0;
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));
width = gimp_image_get_width (image);
height = gimp_image_get_height (image);
if (! clip_result)
{
switch (flip_type)
{
case GIMP_ORIENTATION_HORIZONTAL:
offset_x = SIGNED_ROUND (2.0 * axis - width);
axis = width / 2.0;
break;
case GIMP_ORIENTATION_VERTICAL:
offset_y = SIGNED_ROUND (2.0 * axis - height);
axis = height / 2.0;
break;
case GIMP_ORIENTATION_UNKNOWN:
g_return_if_reached ();
}
}
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));
gimp_image_undo_group_start (image, GIMP_UNDO_GROUP_IMAGE_FLIP, NULL);
/* Flip all layers, channels (including selection mask), and vectors */
while ((item = gimp_object_queue_pop (queue)))
{
gboolean clip = FALSE;
if (GIMP_IS_CHANNEL (item))
clip = clip_result;
gimp_item_flip (item, context, flip_type, axis, clip);
gimp_progress_set_value (progress, 1.0);
}
/* Flip all Guides */
gimp_image_flip_guides (image, flip_type, axis);
/* Flip all sample points */
gimp_image_flip_sample_points (image, flip_type, axis);
if (offset_x || offset_y)
{
gimp_image_undo_push_image_size (image,
NULL,
offset_x,
offset_y,
width,
height);
}
gimp_image_undo_group_end (image);
g_object_unref (queue);
if (offset_x || offset_y)
{
gimp_image_size_changed_detailed (image,
-offset_x,
-offset_y,
width,
height);
}
gimp_unset_busy (image->gimp);
}
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