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afb8867bce
This same code will also be usable for GimpVectorLayer and GimpLinkLayer. It was made generic so that we don't copy the same code over and over. Now it also supports the case when the layer to copy was already added to the image, which is going to be necessary for GimpVectorLayer.
112 lines
3.9 KiB
C
112 lines
3.9 KiB
C
/* GIMP - The GNU Image Manipulation Program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* gimplayer-xcf.c
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*
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* Copyright 2003 Sven Neumann <sven@gimp.org>
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* Copyright 2025 Jehan
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <gdk-pixbuf/gdk-pixbuf.h>
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#include "core-types.h"
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#include "gimpimage.h"
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#include "gimplayer.h"
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#include "gimplayer-xcf.h"
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/**
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* gimp_layer_from_layer:
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* @layer: a #GimpLayer object
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* @options: a #GimpVectorLayerOptions object
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*
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* Converts a standard #GimpLayer into a more specific type of
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* #GimpLayer. The new layer takes ownership of properties of @layer.
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* The @layer object is rendered unusable by this function. Don't even
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* try to use it afterwards!
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*
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* This is a gross hack that is needed in order to load text or vector
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* layers from XCF files in a backwards-compatible way, or as a
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* secondary step (after more data has been loaded). Please don't use it
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* for anything else!
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*
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* The variable list of arguments will be the properties which will be
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* used to create the new layer of type @new_layer_type. Note that the
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* "image" property needs to be set at the minimum.
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*
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* Return value: a newly allocated object of a subtype of #GimpLayer.
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**/
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GimpLayer *
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gimp_layer_from_layer (GimpLayer *layer,
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GType new_layer_type,
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...)
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{
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GimpLayer *new_layer;
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GimpDrawable *drawable;
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GimpImage *image;
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gboolean attached;
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GimpLayer *parent = NULL;
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gint position = 0;
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va_list args;
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const gchar *first_prop;
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g_return_val_if_fail (GIMP_IS_LAYER (layer), NULL);
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g_return_val_if_fail (g_type_is_a (new_layer_type, GIMP_TYPE_LAYER), NULL);
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image = gimp_item_get_image (GIMP_ITEM (layer));
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if ((attached = gimp_item_is_attached (GIMP_ITEM (layer))))
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{
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parent = gimp_layer_get_parent (layer);
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position = gimp_item_get_index (GIMP_ITEM (layer));
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g_object_ref (layer);
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gimp_image_remove_layer (image, layer, FALSE, NULL);
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}
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va_start (args, new_layer_type);
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first_prop = va_arg (args, gchar *);
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new_layer = GIMP_LAYER (g_object_new_valist (new_layer_type, first_prop, args));
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va_end (args);
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gimp_item_replace_item (GIMP_ITEM (new_layer), GIMP_ITEM (layer));
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drawable = GIMP_DRAWABLE (new_layer);
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gimp_drawable_steal_buffer (drawable, GIMP_DRAWABLE (layer));
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gimp_layer_set_opacity (GIMP_LAYER (new_layer),
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gimp_layer_get_opacity (layer), FALSE);
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gimp_layer_set_mode (GIMP_LAYER (new_layer),
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gimp_layer_get_mode (layer), FALSE);
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gimp_layer_set_blend_space (GIMP_LAYER (new_layer),
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gimp_layer_get_blend_space (layer), FALSE);
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gimp_layer_set_composite_space (GIMP_LAYER (new_layer),
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gimp_layer_get_composite_space (layer), FALSE);
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gimp_layer_set_composite_mode (GIMP_LAYER (new_layer),
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gimp_layer_get_composite_mode (layer), FALSE);
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gimp_layer_set_lock_alpha (GIMP_LAYER (new_layer),
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gimp_layer_get_lock_alpha (layer), FALSE);
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g_object_unref (layer);
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if (attached)
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gimp_image_add_layer (image, new_layer, parent, position, FALSE);
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return new_layer;
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}
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