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Diffstat (limited to 'app/core/gimpimage-resize.c')
-rw-r--r-- | app/core/gimpimage-resize.c | 327 |
1 files changed, 327 insertions, 0 deletions
diff --git a/app/core/gimpimage-resize.c b/app/core/gimpimage-resize.c new file mode 100644 index 0000000..e1c46ca --- /dev/null +++ b/app/core/gimpimage-resize.c @@ -0,0 +1,327 @@ +/* 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); + } +} |