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Diffstat (limited to 'app/core/gimpimage-crop.c')
| -rw-r--r-- | app/core/gimpimage-crop.c | 234 |
1 files changed, 234 insertions, 0 deletions
diff --git a/app/core/gimpimage-crop.c b/app/core/gimpimage-crop.c new file mode 100644 index 0000000..c6814d4 --- /dev/null +++ b/app/core/gimpimage-crop.c @@ -0,0 +1,234 @@ +/* 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 "gimp.h" +#include "gimpcontext.h" +#include "gimpguide.h" +#include "gimpimage.h" +#include "gimpimage-crop.h" +#include "gimpimage-guides.h" +#include "gimpimage-sample-points.h" +#include "gimpimage-undo.h" +#include "gimpimage-undo-push.h" +#include "gimplayer.h" +#include "gimpsamplepoint.h" + +#include "gimp-intl.h" + + +/* public functions */ + +void +gimp_image_crop (GimpImage *image, + GimpContext *context, + GimpFillType fill_type, + gint x, + gint y, + gint width, + gint height, + gboolean crop_layers) +{ + GList *list; + gint previous_width; + gint previous_height; + + g_return_if_fail (GIMP_IS_IMAGE (image)); + g_return_if_fail (GIMP_IS_CONTEXT (context)); + + previous_width = gimp_image_get_width (image); + previous_height = gimp_image_get_height (image); + + /* Make sure new width and height are non-zero */ + if (width < 1 || height < 1) + return; + + gimp_set_busy (image->gimp); + + g_object_freeze_notify (G_OBJECT (image)); + + if (crop_layers) + gimp_image_undo_group_start (image, GIMP_UNDO_GROUP_IMAGE_CROP, + C_("undo-type", "Crop Image")); + else + gimp_image_undo_group_start (image, GIMP_UNDO_GROUP_IMAGE_RESIZE, + C_("undo-type", "Resize Image")); + + /* Push the image size to the stack */ + gimp_image_undo_push_image_size (image, NULL, + x, y, width, height); + + /* Set the new width and height */ + g_object_set (image, + "width", width, + "height", height, + NULL); + + /* Resize all channels */ + for (list = gimp_image_get_channel_iter (image); + list; + list = g_list_next (list)) + { + GimpItem *item = list->data; + + gimp_item_resize (item, context, GIMP_FILL_TRANSPARENT, + width, height, -x, -y); + } + + /* Resize all vectors */ + for (list = gimp_image_get_vectors_iter (image); + list; + list = g_list_next (list)) + { + GimpItem *item = list->data; + + gimp_item_resize (item, context, GIMP_FILL_TRANSPARENT, + width, height, -x, -y); + } + + /* Don't forget the selection mask! */ + gimp_item_resize (GIMP_ITEM (gimp_image_get_mask (image)), + context, GIMP_FILL_TRANSPARENT, + width, height, -x, -y); + + /* crop all layers */ + list = gimp_image_get_layer_iter (image); + + while (list) + { + GimpItem *item = list->data; + + list = g_list_next (list); + + gimp_item_translate (item, -x, -y, TRUE); + + if (crop_layers && ! gimp_item_is_content_locked (item)) + { + gint off_x, off_y; + gint lx1, ly1, lx2, ly2; + + gimp_item_get_offset (item, &off_x, &off_y); + + lx1 = CLAMP (off_x, 0, gimp_image_get_width (image)); + ly1 = CLAMP (off_y, 0, gimp_image_get_height (image)); + lx2 = CLAMP (gimp_item_get_width (item) + off_x, + 0, gimp_image_get_width (image)); + ly2 = CLAMP (gimp_item_get_height (item) + off_y, + 0, gimp_image_get_height (image)); + + width = lx2 - lx1; + height = ly2 - ly1; + + if (width > 0 && height > 0) + { + gimp_item_resize (item, context, fill_type, + width, height, + -(lx1 - off_x), + -(ly1 - off_y)); + } + else + { + gimp_image_remove_layer (image, GIMP_LAYER (item), + TRUE, NULL); + } + } + } + + /* Reposition or remove guides */ + list = gimp_image_get_guides (image); + + while (list) + { + GimpGuide *guide = list->data; + gboolean remove_guide = FALSE; + gint position = gimp_guide_get_position (guide); + + list = g_list_next (list); + + switch (gimp_guide_get_orientation (guide)) + { + case GIMP_ORIENTATION_HORIZONTAL: + position -= y; + if ((position < 0) || (position > height)) + remove_guide = TRUE; + break; + + case GIMP_ORIENTATION_VERTICAL: + position -= x; + if ((position < 0) || (position > width)) + remove_guide = TRUE; + break; + + default: + break; + } + + if (remove_guide) + gimp_image_remove_guide (image, guide, TRUE); + else if (position != gimp_guide_get_position (guide)) + gimp_image_move_guide (image, guide, 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_x = old_x; + new_y = old_y; + + new_y -= y; + if ((new_y < 0) || (new_y > height)) + remove_sample_point = TRUE; + + new_x -= x; + if ((new_x < 0) || (new_x > 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); + } + + gimp_image_undo_group_end (image); + + gimp_image_size_changed_detailed (image, + -x, -y, + previous_width, previous_height); + + g_object_thaw_notify (G_OBJECT (image)); + + gimp_unset_busy (image->gimp); +} |