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Diffstat (limited to 'app/core/gimpimage-merge.c')
| -rw-r--r-- | app/core/gimpimage-merge.c | 745 |
1 files changed, 745 insertions, 0 deletions
diff --git a/app/core/gimpimage-merge.c b/app/core/gimpimage-merge.c new file mode 100644 index 0000000..3d96860 --- /dev/null +++ b/app/core/gimpimage-merge.c @@ -0,0 +1,745 @@ +/* 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 <cairo.h> +#include <gegl.h> +#include <gdk-pixbuf/gdk-pixbuf.h> + +#include "libgimpcolor/gimpcolor.h" +#include "libgimpmath/gimpmath.h" +#include "libgimpbase/gimpbase.h" + +#include "core-types.h" + +#include "gegl/gimp-babl-compat.h" +#include "gegl/gimp-gegl-apply-operation.h" +#include "gegl/gimp-gegl-nodes.h" +#include "gegl/gimp-gegl-utils.h" + +#include "vectors/gimpvectors.h" + +#include "gimp.h" +#include "gimpcontext.h" +#include "gimperror.h" +#include "gimpgrouplayer.h" +#include "gimpimage.h" +#include "gimpimage-merge.h" +#include "gimpimage-undo.h" +#include "gimpitemstack.h" +#include "gimplayer-floating-selection.h" +#include "gimplayer-new.h" +#include "gimplayermask.h" +#include "gimpmarshal.h" +#include "gimpparasitelist.h" +#include "gimppickable.h" +#include "gimpprogress.h" +#include "gimpprojectable.h" +#include "gimpundostack.h" + +#include "gimp-intl.h" + + +static GimpLayer * gimp_image_merge_layers (GimpImage *image, + GimpContainer *container, + GSList *merge_list, + GimpContext *context, + GimpMergeType merge_type, + const gchar *undo_desc, + GimpProgress *progress); + + +/* public functions */ + +GimpLayer * +gimp_image_merge_visible_layers (GimpImage *image, + GimpContext *context, + GimpMergeType merge_type, + gboolean merge_active_group, + gboolean discard_invisible, + GimpProgress *progress) +{ + GimpContainer *container; + GList *list; + GSList *merge_list = NULL; + GSList *invisible_list = NULL; + + g_return_val_if_fail (GIMP_IS_IMAGE (image), NULL); + g_return_val_if_fail (GIMP_IS_CONTEXT (context), NULL); + g_return_val_if_fail (progress == NULL || GIMP_IS_PROGRESS (progress), NULL); + + if (merge_active_group) + { + GimpLayer *active_layer = gimp_image_get_active_layer (image); + + /* if the active layer is the floating selection, get the + * underlying drawable, but only if it is a layer + */ + if (active_layer && gimp_layer_is_floating_sel (active_layer)) + { + GimpDrawable *fs_drawable; + + fs_drawable = gimp_layer_get_floating_sel_drawable (active_layer); + + if (GIMP_IS_LAYER (fs_drawable)) + active_layer = GIMP_LAYER (fs_drawable); + } + + if (active_layer) + container = gimp_item_get_container (GIMP_ITEM (active_layer)); + else + container = gimp_image_get_layers (image); + } + else + { + container = gimp_image_get_layers (image); + } + + for (list = gimp_item_stack_get_item_iter (GIMP_ITEM_STACK (container)); + list; + list = g_list_next (list)) + { + GimpLayer *layer = list->data; + + if (gimp_layer_is_floating_sel (layer)) + continue; + + if (gimp_item_get_visible (GIMP_ITEM (layer))) + { + merge_list = g_slist_append (merge_list, layer); + } + else if (discard_invisible) + { + invisible_list = g_slist_append (invisible_list, layer); + } + } + + if (merge_list) + { + GimpLayer *layer; + const gchar *undo_desc = C_("undo-type", "Merge Visible Layers"); + + gimp_set_busy (image->gimp); + + gimp_image_undo_group_start (image, + GIMP_UNDO_GROUP_IMAGE_LAYERS_MERGE, + undo_desc); + + /* if there's a floating selection, anchor it */ + if (gimp_image_get_floating_selection (image)) + floating_sel_anchor (gimp_image_get_floating_selection (image)); + + layer = gimp_image_merge_layers (image, + container, + merge_list, context, merge_type, + undo_desc, progress); + g_slist_free (merge_list); + + if (invisible_list) + { + GSList *list; + + for (list = invisible_list; list; list = g_slist_next (list)) + gimp_image_remove_layer (image, list->data, TRUE, NULL); + + g_slist_free (invisible_list); + } + + gimp_image_undo_group_end (image); + + gimp_unset_busy (image->gimp); + + return layer; + } + + return gimp_image_get_active_layer (image); +} + +GimpLayer * +gimp_image_flatten (GimpImage *image, + GimpContext *context, + GimpProgress *progress, + GError **error) +{ + GList *list; + GSList *merge_list = NULL; + GimpLayer *layer; + + g_return_val_if_fail (GIMP_IS_IMAGE (image), NULL); + g_return_val_if_fail (GIMP_IS_CONTEXT (context), NULL); + g_return_val_if_fail (progress == NULL || GIMP_IS_PROGRESS (progress), NULL); + g_return_val_if_fail (error == NULL || *error == NULL, NULL); + + for (list = gimp_image_get_layer_iter (image); + list; + list = g_list_next (list)) + { + layer = list->data; + + if (gimp_layer_is_floating_sel (layer)) + continue; + + if (gimp_item_get_visible (GIMP_ITEM (layer))) + merge_list = g_slist_append (merge_list, layer); + } + + if (merge_list) + { + const gchar *undo_desc = C_("undo-type", "Flatten Image"); + + gimp_set_busy (image->gimp); + + gimp_image_undo_group_start (image, + GIMP_UNDO_GROUP_IMAGE_LAYERS_MERGE, + undo_desc); + + /* if there's a floating selection, anchor it */ + if (gimp_image_get_floating_selection (image)) + floating_sel_anchor (gimp_image_get_floating_selection (image)); + + layer = gimp_image_merge_layers (image, + gimp_image_get_layers (image), + merge_list, context, + GIMP_FLATTEN_IMAGE, + undo_desc, progress); + g_slist_free (merge_list); + + gimp_image_alpha_changed (image); + + gimp_image_undo_group_end (image); + + gimp_unset_busy (image->gimp); + + return layer; + } + + g_set_error_literal (error, GIMP_ERROR, GIMP_FAILED, + _("Cannot flatten an image without any visible layer.")); + return NULL; +} + +GimpLayer * +gimp_image_merge_down (GimpImage *image, + GimpLayer *current_layer, + GimpContext *context, + GimpMergeType merge_type, + GimpProgress *progress, + GError **error) +{ + GimpLayer *layer; + GList *list; + GList *layer_list = NULL; + GSList *merge_list = NULL; + const gchar *undo_desc; + + g_return_val_if_fail (GIMP_IS_IMAGE (image), NULL); + g_return_val_if_fail (GIMP_IS_LAYER (current_layer), NULL); + g_return_val_if_fail (gimp_item_is_attached (GIMP_ITEM (current_layer)), NULL); + g_return_val_if_fail (GIMP_IS_CONTEXT (context), NULL); + g_return_val_if_fail (progress == NULL || GIMP_IS_PROGRESS (progress), NULL); + g_return_val_if_fail (error == NULL || *error == NULL, NULL); + + if (gimp_layer_is_floating_sel (current_layer)) + { + g_set_error_literal (error, GIMP_ERROR, GIMP_FAILED, + _("Cannot merge down a floating selection.")); + return NULL; + } + + if (! gimp_item_get_visible (GIMP_ITEM (current_layer))) + { + g_set_error_literal (error, GIMP_ERROR, GIMP_FAILED, + _("Cannot merge down an invisible layer.")); + return NULL; + } + + for (list = gimp_item_get_container_iter (GIMP_ITEM (current_layer)); + list; + list = g_list_next (list)) + { + layer = list->data; + + if (layer == current_layer) + break; + } + + for (layer_list = g_list_next (list); + layer_list; + layer_list = g_list_next (layer_list)) + { + layer = layer_list->data; + + if (gimp_item_get_visible (GIMP_ITEM (layer))) + { + if (gimp_viewable_get_children (GIMP_VIEWABLE (layer))) + { + g_set_error_literal (error, GIMP_ERROR, GIMP_FAILED, + _("Cannot merge down to a layer group.")); + return NULL; + } + + if (gimp_item_is_content_locked (GIMP_ITEM (layer))) + { + g_set_error_literal (error, GIMP_ERROR, GIMP_FAILED, + _("The layer to merge down to is locked.")); + return NULL; + } + + merge_list = g_slist_append (NULL, layer); + break; + } + } + + if (! merge_list) + { + g_set_error_literal (error, GIMP_ERROR, GIMP_FAILED, + _("There is no visible layer to merge down to.")); + return NULL; + } + + merge_list = g_slist_prepend (merge_list, current_layer); + + undo_desc = C_("undo-type", "Merge Down"); + + gimp_set_busy (image->gimp); + + gimp_image_undo_group_start (image, + GIMP_UNDO_GROUP_IMAGE_LAYERS_MERGE, + undo_desc); + + layer = gimp_image_merge_layers (image, + gimp_item_get_container (GIMP_ITEM (current_layer)), + merge_list, context, merge_type, + undo_desc, progress); + g_slist_free (merge_list); + + gimp_image_undo_group_end (image); + + gimp_unset_busy (image->gimp); + + return layer; +} + +GimpLayer * +gimp_image_merge_group_layer (GimpImage *image, + GimpGroupLayer *group) +{ + GimpLayer *parent; + GimpLayer *layer; + gint index; + + g_return_val_if_fail (GIMP_IS_IMAGE (image), NULL); + g_return_val_if_fail (GIMP_IS_GROUP_LAYER (group), NULL); + g_return_val_if_fail (gimp_item_is_attached (GIMP_ITEM (group)), NULL); + g_return_val_if_fail (gimp_item_get_image (GIMP_ITEM (group)) == image, NULL); + + gimp_image_undo_group_start (image, GIMP_UNDO_GROUP_IMAGE_LAYERS_MERGE, + C_("undo-type", "Merge Layer Group")); + + parent = gimp_layer_get_parent (GIMP_LAYER (group)); + index = gimp_item_get_index (GIMP_ITEM (group)); + + /* if this is a pass-through group, change its mode to NORMAL *before* + * duplicating it, since PASS_THROUGH mode is invalid for regular layers. + * see bug #793714. + */ + if (gimp_layer_get_mode (GIMP_LAYER (group)) == GIMP_LAYER_MODE_PASS_THROUGH) + { + GimpLayerColorSpace blend_space; + GimpLayerColorSpace composite_space; + GimpLayerCompositeMode composite_mode; + + /* keep the group's current blend space, composite space, and composite + * mode. + */ + blend_space = gimp_layer_get_blend_space (GIMP_LAYER (group)); + composite_space = gimp_layer_get_composite_space (GIMP_LAYER (group)); + composite_mode = gimp_layer_get_composite_mode (GIMP_LAYER (group)); + + gimp_layer_set_mode (GIMP_LAYER (group), GIMP_LAYER_MODE_NORMAL, TRUE); + gimp_layer_set_blend_space (GIMP_LAYER (group), blend_space, TRUE); + gimp_layer_set_composite_space (GIMP_LAYER (group), composite_space, TRUE); + gimp_layer_set_composite_mode (GIMP_LAYER (group), composite_mode, TRUE); + } + + layer = GIMP_LAYER (gimp_item_duplicate (GIMP_ITEM (group), + GIMP_TYPE_LAYER)); + + gimp_object_set_name (GIMP_OBJECT (layer), gimp_object_get_name (group)); + + gimp_image_remove_layer (image, GIMP_LAYER (group), TRUE, NULL); + gimp_image_add_layer (image, layer, parent, index, TRUE); + + gimp_image_undo_group_end (image); + + return layer; +} + + +/* merging vectors */ + +GimpVectors * +gimp_image_merge_visible_vectors (GimpImage *image, + GError **error) +{ + GList *list; + GList *merge_list = NULL; + GimpVectors *vectors; + + g_return_val_if_fail (GIMP_IS_IMAGE (image), NULL); + g_return_val_if_fail (error == NULL || *error == NULL, NULL); + + for (list = gimp_image_get_vectors_iter (image); + list; + list = g_list_next (list)) + { + vectors = list->data; + + if (gimp_item_get_visible (GIMP_ITEM (vectors))) + merge_list = g_list_prepend (merge_list, vectors); + } + + merge_list = g_list_reverse (merge_list); + + if (merge_list && merge_list->next) + { + GimpVectors *target_vectors; + gchar *name; + gint pos; + + gimp_set_busy (image->gimp); + + gimp_image_undo_group_start (image, GIMP_UNDO_GROUP_IMAGE_VECTORS_MERGE, + C_("undo-type", "Merge Visible Paths")); + + vectors = GIMP_VECTORS (merge_list->data); + + name = g_strdup (gimp_object_get_name (vectors)); + pos = gimp_item_get_index (GIMP_ITEM (vectors)); + + target_vectors = GIMP_VECTORS (gimp_item_duplicate (GIMP_ITEM (vectors), + GIMP_TYPE_VECTORS)); + gimp_image_remove_vectors (image, vectors, TRUE, NULL); + + for (list = g_list_next (merge_list); + list; + list = g_list_next (list)) + { + vectors = list->data; + + gimp_vectors_add_strokes (vectors, target_vectors); + gimp_image_remove_vectors (image, vectors, TRUE, NULL); + } + + gimp_object_take_name (GIMP_OBJECT (target_vectors), name); + + g_list_free (merge_list); + + /* FIXME tree */ + gimp_image_add_vectors (image, target_vectors, NULL, pos, TRUE); + gimp_unset_busy (image->gimp); + + gimp_image_undo_group_end (image); + + return target_vectors; + } + else + { + g_set_error_literal (error, GIMP_ERROR, GIMP_FAILED, + _("Not enough visible paths for a merge. " + "There must be at least two.")); + return NULL; + } +} + + +/* private functions */ + +static GimpLayer * +gimp_image_merge_layers (GimpImage *image, + GimpContainer *container, + GSList *merge_list, + GimpContext *context, + GimpMergeType merge_type, + const gchar *undo_desc, + GimpProgress *progress) +{ + GimpLayer *parent; + gint x1, y1; + gint x2, y2; + GSList *layers; + GimpLayer *layer; + GimpLayer *top_layer; + GimpLayer *bottom_layer; + GimpLayer *merge_layer; + gint position; + GeglNode *node; + GeglNode *source_node; + GeglNode *flatten_node; + GeglNode *offset_node; + GeglNode *last_node; + GeglNode *last_node_source; + GimpParasiteList *parasites; + + g_return_val_if_fail (GIMP_IS_IMAGE (image), NULL); + g_return_val_if_fail (GIMP_IS_CONTEXT (context), NULL); + g_return_val_if_fail (progress == NULL || GIMP_IS_PROGRESS (progress), NULL); + + top_layer = merge_list->data; + parent = gimp_layer_get_parent (top_layer); + + /* Make sure the image's graph is constructed, so that top-level layers have + * a parent node. + */ + (void) gimp_projectable_get_graph (GIMP_PROJECTABLE (image)); + + /* Make sure the parent's graph is constructed, so that the top layer has a + * parent node, even if it is the child of a group layer (in particular, of + * an invisible group layer, whose graph may not have been constructed as a + * result of the above call. see issue #2095.) + */ + if (parent) + (void) gimp_filter_get_node (GIMP_FILTER (parent)); + + /* Build our graph inside the top-layer's parent node */ + source_node = gimp_filter_get_node (GIMP_FILTER (top_layer)); + node = gegl_node_get_parent (source_node); + + g_return_val_if_fail (node, NULL); + + /* Get the layer extents */ + x1 = y1 = 0; + x2 = y2 = 0; + for (layers = merge_list; layers; layers = g_slist_next (layers)) + { + gint off_x, off_y; + + layer = layers->data; + + gimp_item_get_offset (GIMP_ITEM (layer), &off_x, &off_y); + + switch (merge_type) + { + case GIMP_EXPAND_AS_NECESSARY: + case GIMP_CLIP_TO_IMAGE: + if (layers == merge_list) + { + x1 = off_x; + y1 = off_y; + x2 = off_x + gimp_item_get_width (GIMP_ITEM (layer)); + y2 = off_y + gimp_item_get_height (GIMP_ITEM (layer)); + } + else + { + if (off_x < x1) + x1 = off_x; + if (off_y < y1) + y1 = off_y; + if ((off_x + gimp_item_get_width (GIMP_ITEM (layer))) > x2) + x2 = (off_x + gimp_item_get_width (GIMP_ITEM (layer))); + if ((off_y + gimp_item_get_height (GIMP_ITEM (layer))) > y2) + y2 = (off_y + gimp_item_get_height (GIMP_ITEM (layer))); + } + + if (merge_type == GIMP_CLIP_TO_IMAGE) + { + x1 = CLAMP (x1, 0, gimp_image_get_width (image)); + y1 = CLAMP (y1, 0, gimp_image_get_height (image)); + x2 = CLAMP (x2, 0, gimp_image_get_width (image)); + y2 = CLAMP (y2, 0, gimp_image_get_height (image)); + } + break; + + case GIMP_CLIP_TO_BOTTOM_LAYER: + if (layers->next == NULL) + { + x1 = off_x; + y1 = off_y; + x2 = off_x + gimp_item_get_width (GIMP_ITEM (layer)); + y2 = off_y + gimp_item_get_height (GIMP_ITEM (layer)); + } + break; + + case GIMP_FLATTEN_IMAGE: + if (layers->next == NULL) + { + x1 = 0; + y1 = 0; + x2 = gimp_image_get_width (image); + y2 = gimp_image_get_height (image); + } + break; + } + } + + if ((x2 - x1) == 0 || (y2 - y1) == 0) + return NULL; + + bottom_layer = layer; + + flatten_node = NULL; + + if (merge_type == GIMP_FLATTEN_IMAGE || + (gimp_drawable_is_indexed (GIMP_DRAWABLE (layer)) && + ! gimp_drawable_has_alpha (GIMP_DRAWABLE (layer)))) + { + GimpRGB bg; + + merge_layer = gimp_layer_new (image, (x2 - x1), (y2 - y1), + gimp_image_get_layer_format (image, FALSE), + gimp_object_get_name (bottom_layer), + GIMP_OPACITY_OPAQUE, + gimp_image_get_default_new_layer_mode (image)); + + if (! merge_layer) + { + g_warning ("%s: could not allocate merge layer", G_STRFUNC); + + return NULL; + } + + /* get the background for compositing */ + gimp_context_get_background (context, &bg); + gimp_pickable_srgb_to_image_color (GIMP_PICKABLE (layer), + &bg, &bg); + + flatten_node = gimp_gegl_create_flatten_node ( + &bg, gimp_layer_get_real_composite_space (bottom_layer)); + } + else + { + /* The final merged layer inherits the name of the bottom most layer + * and the resulting layer has an alpha channel whether or not the + * original did. Opacity is set to 100% and the MODE is set to normal. + */ + + merge_layer = + gimp_layer_new (image, (x2 - x1), (y2 - y1), + gimp_drawable_get_format_with_alpha (GIMP_DRAWABLE (bottom_layer)), + gimp_object_get_name (bottom_layer), + GIMP_OPACITY_OPAQUE, + gimp_image_get_default_new_layer_mode (image)); + + if (! merge_layer) + { + g_warning ("%s: could not allocate merge layer", G_STRFUNC); + + return NULL; + } + } + + if (merge_type == GIMP_FLATTEN_IMAGE) + { + position = 0; + } + else + { + /* Find the index in the layer list of the bottom layer--we need this + * in order to add the final, merged layer to the layer list correctly + */ + position = + gimp_container_get_n_children (container) - + gimp_container_get_child_index (container, GIMP_OBJECT (bottom_layer)); + } + + gimp_item_set_offset (GIMP_ITEM (merge_layer), x1, y1); + + offset_node = gegl_node_new_child (node, + "operation", "gegl:translate", + "x", (gdouble) -x1, + "y", (gdouble) -y1, + NULL); + + if (flatten_node) + { + gegl_node_add_child (node, flatten_node); + g_object_unref (flatten_node); + + gegl_node_link_many (source_node, flatten_node, offset_node, NULL); + } + else + { + gegl_node_link_many (source_node, offset_node, NULL); + } + + /* Disconnect the bottom-layer node's input */ + last_node = gimp_filter_get_node (GIMP_FILTER (bottom_layer)); + last_node_source = gegl_node_get_producer (last_node, "input", NULL); + + gegl_node_disconnect (last_node, "input"); + + /* Render the graph into the merge layer */ + gimp_gegl_apply_operation (NULL, progress, undo_desc, offset_node, + gimp_drawable_get_buffer ( + GIMP_DRAWABLE (merge_layer)), + NULL, FALSE); + + /* Reconnect the bottom-layer node's input */ + if (last_node_source) + gegl_node_link (last_node_source, last_node); + + /* Clean up the graph */ + gegl_node_remove_child (node, offset_node); + + if (flatten_node) + gegl_node_remove_child (node, flatten_node); + + /* Copy the tattoo and parasites of the bottom layer to the new layer */ + gimp_item_set_tattoo (GIMP_ITEM (merge_layer), + gimp_item_get_tattoo (GIMP_ITEM (bottom_layer))); + + parasites = gimp_item_get_parasites (GIMP_ITEM (bottom_layer)); + parasites = gimp_parasite_list_copy (parasites); + gimp_item_set_parasites (GIMP_ITEM (merge_layer), parasites); + g_object_unref (parasites); + + /* Remove the merged layers from the image */ + for (layers = merge_list; layers; layers = g_slist_next (layers)) + gimp_image_remove_layer (image, layers->data, TRUE, NULL); + + gimp_item_set_visible (GIMP_ITEM (merge_layer), TRUE, FALSE); + + /* if the type is flatten, remove all the remaining layers */ + if (merge_type == GIMP_FLATTEN_IMAGE) + { + GList *list = gimp_image_get_layer_iter (image); + + while (list) + { + layer = list->data; + + list = g_list_next (list); + gimp_image_remove_layer (image, layer, TRUE, NULL); + } + + gimp_image_add_layer (image, merge_layer, parent, + position, TRUE); + } + else + { + /* Add the layer to the image */ + gimp_image_add_layer (image, merge_layer, parent, + gimp_container_get_n_children (container) - + position + 1, + TRUE); + } + + gimp_drawable_update (GIMP_DRAWABLE (merge_layer), 0, 0, -1, -1); + + return merge_layer; +} |