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-rw-r--r--app/core/gimpimage-flip.c276
1 files changed, 276 insertions, 0 deletions
diff --git a/app/core/gimpimage-flip.c b/app/core/gimpimage-flip.c
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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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