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-rw-r--r--app/core/gimpimage-rotate.c377
1 files changed, 377 insertions, 0 deletions
diff --git a/app/core/gimpimage-rotate.c b/app/core/gimpimage-rotate.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 "core-types.h"
+
+#include "vectors/gimpvectors.h"
+
+#include "gimp.h"
+#include "gimpcontainer.h"
+#include "gimpcontext.h"
+#include "gimpguide.h"
+#include "gimpimage.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);
+
+
+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);
+}
+
+
+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;
+ }
+ }
+}
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