350 lines
9.6 KiB
C
350 lines
9.6 KiB
C
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/* PIKA - Photo and Image Kooker Application
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* a rebranding of The GNU Image Manipulation Program (created with heckimp)
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* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
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*
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* Original copyright, applying to most contents (license remains unchanged):
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* Copyright (C) 1995-1997 Spencer Kimball and Peter Mattis
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*
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* pikafilterstack.c
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* Copyright (C) 2008-2013 Michael Natterer <mitch@gimp.org>
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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 <gegl.h>
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#include "core-types.h"
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#include "pikafilter.h"
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#include "pikafilterstack.h"
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/* local function prototypes */
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static void pika_filter_stack_constructed (GObject *object);
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static void pika_filter_stack_finalize (GObject *object);
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static void pika_filter_stack_add (PikaContainer *container,
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PikaObject *object);
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static void pika_filter_stack_remove (PikaContainer *container,
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PikaObject *object);
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static void pika_filter_stack_reorder (PikaContainer *container,
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PikaObject *object,
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gint new_index);
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static void pika_filter_stack_add_node (PikaFilterStack *stack,
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PikaFilter *filter);
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static void pika_filter_stack_remove_node (PikaFilterStack *stack,
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PikaFilter *filter);
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static void pika_filter_stack_update_last_node (PikaFilterStack *stack);
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static void pika_filter_stack_filter_active (PikaFilter *filter,
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PikaFilterStack *stack);
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G_DEFINE_TYPE (PikaFilterStack, pika_filter_stack, PIKA_TYPE_LIST);
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#define parent_class pika_filter_stack_parent_class
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static void
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pika_filter_stack_class_init (PikaFilterStackClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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PikaContainerClass *container_class = PIKA_CONTAINER_CLASS (klass);
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object_class->constructed = pika_filter_stack_constructed;
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object_class->finalize = pika_filter_stack_finalize;
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container_class->add = pika_filter_stack_add;
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container_class->remove = pika_filter_stack_remove;
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container_class->reorder = pika_filter_stack_reorder;
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}
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static void
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pika_filter_stack_init (PikaFilterStack *stack)
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{
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}
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static void
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pika_filter_stack_constructed (GObject *object)
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{
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PikaContainer *container = PIKA_CONTAINER (object);
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G_OBJECT_CLASS (parent_class)->constructed (object);
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pika_assert (g_type_is_a (pika_container_get_children_type (container),
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PIKA_TYPE_FILTER));
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pika_container_add_handler (container, "active-changed",
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G_CALLBACK (pika_filter_stack_filter_active),
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container);
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}
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static void
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pika_filter_stack_finalize (GObject *object)
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{
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PikaFilterStack *stack = PIKA_FILTER_STACK (object);
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g_clear_object (&stack->graph);
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static void
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pika_filter_stack_add (PikaContainer *container,
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PikaObject *object)
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{
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PikaFilterStack *stack = PIKA_FILTER_STACK (container);
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PikaFilter *filter = PIKA_FILTER (object);
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PIKA_CONTAINER_CLASS (parent_class)->add (container, object);
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if (pika_filter_get_active (filter))
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{
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if (stack->graph)
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{
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gegl_node_add_child (stack->graph, pika_filter_get_node (filter));
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pika_filter_stack_add_node (stack, filter);
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}
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pika_filter_stack_update_last_node (stack);
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}
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}
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static void
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pika_filter_stack_remove (PikaContainer *container,
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PikaObject *object)
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{
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PikaFilterStack *stack = PIKA_FILTER_STACK (container);
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PikaFilter *filter = PIKA_FILTER (object);
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if (stack->graph && pika_filter_get_active (filter))
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{
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pika_filter_stack_remove_node (stack, filter);
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gegl_node_remove_child (stack->graph, pika_filter_get_node (filter));
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}
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PIKA_CONTAINER_CLASS (parent_class)->remove (container, object);
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if (pika_filter_get_active (filter))
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{
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pika_filter_set_is_last_node (filter, FALSE);
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pika_filter_stack_update_last_node (stack);
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}
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}
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static void
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pika_filter_stack_reorder (PikaContainer *container,
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PikaObject *object,
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gint new_index)
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{
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PikaFilterStack *stack = PIKA_FILTER_STACK (container);
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PikaFilter *filter = PIKA_FILTER (object);
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if (stack->graph && pika_filter_get_active (filter))
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pika_filter_stack_remove_node (stack, filter);
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PIKA_CONTAINER_CLASS (parent_class)->reorder (container, object, new_index);
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if (pika_filter_get_active (filter))
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{
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pika_filter_stack_update_last_node (stack);
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if (stack->graph)
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pika_filter_stack_add_node (stack, filter);
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}
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}
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/* public functions */
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PikaContainer *
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pika_filter_stack_new (GType filter_type)
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{
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g_return_val_if_fail (g_type_is_a (filter_type, PIKA_TYPE_FILTER), NULL);
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return g_object_new (PIKA_TYPE_FILTER_STACK,
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"name", g_type_name (filter_type),
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"children-type", filter_type,
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"policy", PIKA_CONTAINER_POLICY_STRONG,
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NULL);
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}
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GeglNode *
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pika_filter_stack_get_graph (PikaFilterStack *stack)
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{
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GList *list;
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GeglNode *previous;
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GeglNode *output;
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g_return_val_if_fail (PIKA_IS_FILTER_STACK (stack), NULL);
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if (stack->graph)
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return stack->graph;
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stack->graph = gegl_node_new ();
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previous = gegl_node_get_input_proxy (stack->graph, "input");
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for (list = PIKA_LIST (stack)->queue->tail;
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list;
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list = g_list_previous (list))
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{
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PikaFilter *filter = list->data;
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GeglNode *node;
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if (! pika_filter_get_active (filter))
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continue;
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node = pika_filter_get_node (filter);
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gegl_node_add_child (stack->graph, node);
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gegl_node_link (previous, node);
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previous = node;
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}
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output = gegl_node_get_output_proxy (stack->graph, "output");
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gegl_node_link (previous, output);
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return stack->graph;
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}
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/* private functions */
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static void
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pika_filter_stack_add_node (PikaFilterStack *stack,
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PikaFilter *filter)
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{
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GeglNode *node;
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GeglNode *node_above = NULL;
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GeglNode *node_below = NULL;
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GList *iter;
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node = pika_filter_get_node (filter);
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iter = g_list_find (PIKA_LIST (stack)->queue->head, filter);
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while ((iter = g_list_previous (iter)))
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{
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PikaFilter *filter_above = iter->data;
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if (pika_filter_get_active (filter_above))
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{
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node_above = pika_filter_get_node (filter_above);
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break;
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}
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}
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if (! node_above)
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node_above = gegl_node_get_output_proxy (stack->graph, "output");
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node_below = gegl_node_get_producer (node_above, "input", NULL);
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gegl_node_link (node_below, node);
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gegl_node_link (node, node_above);
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}
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static void
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pika_filter_stack_remove_node (PikaFilterStack *stack,
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PikaFilter *filter)
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{
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GeglNode *node;
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GeglNode *node_above = NULL;
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GeglNode *node_below = NULL;
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GList *iter;
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node = pika_filter_get_node (filter);
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iter = g_list_find (PIKA_LIST (stack)->queue->head, filter);
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while ((iter = g_list_previous (iter)))
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{
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PikaFilter *filter_above = iter->data;
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if (pika_filter_get_active (filter_above))
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{
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node_above = pika_filter_get_node (filter_above);
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break;
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}
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}
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if (! node_above)
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node_above = gegl_node_get_output_proxy (stack->graph, "output");
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node_below = gegl_node_get_producer (node, "input", NULL);
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gegl_node_disconnect (node, "input");
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gegl_node_link (node_below, node_above);
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}
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static void
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pika_filter_stack_update_last_node (PikaFilterStack *stack)
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{
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GList *list;
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gboolean found_last = FALSE;
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for (list = PIKA_LIST (stack)->queue->tail;
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list;
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list = g_list_previous (list))
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{
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PikaFilter *filter = list->data;
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if (! found_last && pika_filter_get_active (filter))
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{
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pika_filter_set_is_last_node (filter, TRUE);
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found_last = TRUE;
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}
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else
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{
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pika_filter_set_is_last_node (filter, FALSE);
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}
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}
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}
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static void
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pika_filter_stack_filter_active (PikaFilter *filter,
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PikaFilterStack *stack)
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{
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if (stack->graph)
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{
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if (pika_filter_get_active (filter))
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{
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gegl_node_add_child (stack->graph, pika_filter_get_node (filter));
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pika_filter_stack_add_node (stack, filter);
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}
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else
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{
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pika_filter_stack_remove_node (stack, filter);
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gegl_node_remove_child (stack->graph, pika_filter_get_node (filter));
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}
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}
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pika_filter_stack_update_last_node (stack);
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if (! pika_filter_get_active (filter))
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pika_filter_set_is_last_node (filter, FALSE);
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}
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