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-rw-r--r--app/core/gimpimage-resize.c327
1 files changed, 327 insertions, 0 deletions
diff --git a/app/core/gimpimage-resize.c b/app/core/gimpimage-resize.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 "libgimpbase/gimpbase.h"
+
+#include "core-types.h"
+
+#include "gimp.h"
+#include "gimpcontainer.h"
+#include "gimpcontext.h"
+#include "gimpguide.h"
+#include "gimpimage.h"
+#include "gimpimage-guides.h"
+#include "gimpimage-item-list.h"
+#include "gimpimage-resize.h"
+#include "gimpimage-sample-points.h"
+#include "gimpimage-undo.h"
+#include "gimpimage-undo-push.h"
+#include "gimplayer.h"
+#include "gimpobjectqueue.h"
+#include "gimpprogress.h"
+#include "gimpsamplepoint.h"
+
+#include "text/gimptextlayer.h"
+
+#include "gimp-intl.h"
+
+
+void
+gimp_image_resize (GimpImage *image,
+ GimpContext *context,
+ gint new_width,
+ gint new_height,
+ gint offset_x,
+ gint offset_y,
+ GimpProgress *progress)
+{
+ gimp_image_resize_with_layers (image, context, GIMP_FILL_TRANSPARENT,
+ new_width, new_height, offset_x, offset_y,
+ GIMP_ITEM_SET_NONE, TRUE,
+ progress);
+}
+
+void
+gimp_image_resize_with_layers (GimpImage *image,
+ GimpContext *context,
+ GimpFillType fill_type,
+ gint new_width,
+ gint new_height,
+ gint offset_x,
+ gint offset_y,
+ GimpItemSet layer_set,
+ gboolean resize_text_layers,
+ GimpProgress *progress)
+{
+ GimpObjectQueue *queue;
+ GList *resize_layers;
+ GList *list;
+ GimpItem *item;
+ gint old_width, old_height;
+
+ g_return_if_fail (GIMP_IS_IMAGE (image));
+ g_return_if_fail (GIMP_IS_CONTEXT (context));
+ g_return_if_fail (new_width > 0 && new_height > 0);
+ g_return_if_fail (progress == NULL || GIMP_IS_PROGRESS (progress));
+
+ gimp_set_busy (image->gimp);
+
+ g_object_freeze_notify (G_OBJECT (image));
+
+ gimp_image_undo_group_start (image, GIMP_UNDO_GROUP_IMAGE_RESIZE,
+ C_("undo-type", "Resize Image"));
+
+ resize_layers = gimp_image_item_list_get_list (image,
+ GIMP_ITEM_TYPE_LAYERS,
+ layer_set);
+
+ old_width = gimp_image_get_width (image);
+ old_height = gimp_image_get_height (image);
+
+ /* Push the image size to the stack */
+ gimp_image_undo_push_image_size (image, NULL,
+ -offset_x, -offset_y,
+ new_width, new_height);
+
+ /* Set the new width and height */
+ g_object_set (image,
+ "width", new_width,
+ "height", new_height,
+ NULL);
+
+ /* Reposition all layers */
+ for (list = gimp_image_get_layer_iter (image);
+ list;
+ list = g_list_next (list))
+ {
+ GimpItem *item = list->data;
+
+ gimp_item_translate (item, offset_x, offset_y, TRUE);
+ }
+
+ queue = gimp_object_queue_new (progress);
+ progress = GIMP_PROGRESS (queue);
+
+ for (list = resize_layers; list; list = g_list_next (list))
+ {
+ GimpItem *item = list->data;
+
+ /* group layers can't be resized here */
+ if (gimp_viewable_get_children (GIMP_VIEWABLE (item)))
+ continue;
+
+ if (! resize_text_layers && gimp_item_is_text_layer (item))
+ continue;
+
+ /* note that we call gimp_item_start_move(), and not
+ * gimp_item_start_transform(). see the comment in gimp_item_resize()
+ * for more information.
+ */
+ gimp_item_start_move (item, TRUE);
+
+ gimp_object_queue_push (queue, item);
+ }
+
+ g_list_free (resize_layers);
+
+ 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));
+
+ /* Resize all resize_layers, channels (including selection mask), and
+ * vectors
+ */
+ while ((item = gimp_object_queue_pop (queue)))
+ {
+ if (GIMP_IS_LAYER (item))
+ {
+ gint old_offset_x;
+ gint old_offset_y;
+
+ gimp_item_get_offset (item, &old_offset_x, &old_offset_y);
+
+ gimp_item_resize (item, context, fill_type,
+ new_width, new_height,
+ old_offset_x, old_offset_y);
+
+ gimp_item_end_move (item, TRUE);
+ }
+ else
+ {
+ gimp_item_resize (item, context, GIMP_FILL_TRANSPARENT,
+ new_width, new_height, offset_x, offset_y);
+ }
+ }
+
+ /* Reposition or remove all guides */
+ list = gimp_image_get_guides (image);
+
+ while (list)
+ {
+ GimpGuide *guide = list->data;
+ gboolean remove_guide = FALSE;
+ gint new_position = gimp_guide_get_position (guide);
+
+ list = g_list_next (list);
+
+ switch (gimp_guide_get_orientation (guide))
+ {
+ case GIMP_ORIENTATION_HORIZONTAL:
+ new_position += offset_y;
+ if (new_position < 0 || new_position > new_height)
+ remove_guide = TRUE;
+ break;
+
+ case GIMP_ORIENTATION_VERTICAL:
+ new_position += offset_x;
+ if (new_position < 0 || new_position > new_width)
+ remove_guide = TRUE;
+ break;
+
+ default:
+ break;
+ }
+
+ if (remove_guide)
+ gimp_image_remove_guide (image, guide, TRUE);
+ else if (new_position != gimp_guide_get_position (guide))
+ gimp_image_move_guide (image, guide, new_position, TRUE);
+ }
+
+ /* Reposition or remove sample points */
+ list = gimp_image_get_sample_points (image);
+
+ while (list)
+ {
+ GimpSamplePoint *sample_point = list->data;
+ gboolean remove_sample_point = FALSE;
+ gint old_x;
+ gint old_y;
+ gint new_x;
+ gint new_y;
+
+ list = g_list_next (list);
+
+ gimp_sample_point_get_position (sample_point, &old_x, &old_y);
+
+ new_y = old_y + offset_y;
+ if ((new_y < 0) || (new_y >= new_height))
+ remove_sample_point = TRUE;
+
+ new_x = old_x + offset_x;
+ if ((new_x < 0) || (new_x >= new_width))
+ remove_sample_point = TRUE;
+
+ if (remove_sample_point)
+ gimp_image_remove_sample_point (image, sample_point, TRUE);
+ else if (new_x != old_x || new_y != old_y)
+ gimp_image_move_sample_point (image, sample_point,
+ new_x, new_y, TRUE);
+ }
+
+ g_object_unref (queue);
+
+ gimp_image_undo_group_end (image);
+
+ gimp_image_size_changed_detailed (image,
+ offset_x, offset_y,
+ old_width, old_height);
+
+ g_object_thaw_notify (G_OBJECT (image));
+
+ gimp_unset_busy (image->gimp);
+}
+
+void
+gimp_image_resize_to_layers (GimpImage *image,
+ GimpContext *context,
+ gint *offset_x,
+ gint *offset_y,
+ gint *new_width,
+ gint *new_height,
+ GimpProgress *progress)
+{
+ GList *list;
+ GimpItem *item;
+ gint x, y;
+ gint width, height;
+
+ 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));
+
+ list = gimp_image_get_layer_iter (image);
+
+ if (! list)
+ return;
+
+ /* figure out starting values */
+ item = list->data;
+
+ x = gimp_item_get_offset_x (item);
+ y = gimp_item_get_offset_y (item);
+ width = gimp_item_get_width (item);
+ height = gimp_item_get_height (item);
+
+ /* Respect all layers */
+ for (list = g_list_next (list); list; list = g_list_next (list))
+ {
+ item = list->data;
+
+ gimp_rectangle_union (x, y,
+ width, height,
+ gimp_item_get_offset_x (item),
+ gimp_item_get_offset_y (item),
+ gimp_item_get_width (item),
+ gimp_item_get_height (item),
+ &x, &y,
+ &width, &height);
+ }
+
+ gimp_image_resize (image, context,
+ width, height, -x, -y,
+ progress);
+ if (offset_x)
+ *offset_x = -x;
+ if (offset_y)
+ *offset_y = -y;
+ if (new_width)
+ *new_width = width;
+ if (new_height)
+ *new_height = height;
+}
+
+void
+gimp_image_resize_to_selection (GimpImage *image,
+ GimpContext *context,
+ GimpProgress *progress)
+{
+ GimpChannel *selection = gimp_image_get_mask (image);
+ gint x, y, w, h;
+
+ if (gimp_item_bounds (GIMP_ITEM (selection), &x, &y, &w, &h))
+ {
+ gimp_image_resize (image, context,
+ w, h, -x, -y,
+ progress);
+ }
+}
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