diff options
Diffstat (limited to 'app/core/gimpimage-rotate.c')
-rw-r--r-- | app/core/gimpimage-rotate.c | 377 |
1 files changed, 377 insertions, 0 deletions
diff --git a/app/core/gimpimage-rotate.c b/app/core/gimpimage-rotate.c new file mode 100644 index 0000000..682319f --- /dev/null +++ b/app/core/gimpimage-rotate.c @@ -0,0 +1,377 @@ +/* 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; + } + } +} |