diff options
Diffstat (limited to 'app/core/gimpfilterstack.c')
| -rw-r--r-- | app/core/gimpfilterstack.c | 350 |
1 files changed, 350 insertions, 0 deletions
diff --git a/app/core/gimpfilterstack.c b/app/core/gimpfilterstack.c new file mode 100644 index 0000000..09d9cfd --- /dev/null +++ b/app/core/gimpfilterstack.c @@ -0,0 +1,350 @@ +/* GIMP - The GNU Image Manipulation Program + * Copyright (C) 1995-1997 Spencer Kimball and Peter Mattis + * + * gimpfilterstack.c + * Copyright (C) 2008-2013 Michael Natterer <mitch@gimp.org> + * + * 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 "gimpfilter.h" +#include "gimpfilterstack.h" + + +/* local function prototypes */ + +static void gimp_filter_stack_constructed (GObject *object); +static void gimp_filter_stack_finalize (GObject *object); + +static void gimp_filter_stack_add (GimpContainer *container, + GimpObject *object); +static void gimp_filter_stack_remove (GimpContainer *container, + GimpObject *object); +static void gimp_filter_stack_reorder (GimpContainer *container, + GimpObject *object, + gint new_index); + +static void gimp_filter_stack_add_node (GimpFilterStack *stack, + GimpFilter *filter); +static void gimp_filter_stack_remove_node (GimpFilterStack *stack, + GimpFilter *filter); +static void gimp_filter_stack_update_last_node (GimpFilterStack *stack); + +static void gimp_filter_stack_filter_active (GimpFilter *filter, + GimpFilterStack *stack); + + +G_DEFINE_TYPE (GimpFilterStack, gimp_filter_stack, GIMP_TYPE_LIST); + +#define parent_class gimp_filter_stack_parent_class + + +static void +gimp_filter_stack_class_init (GimpFilterStackClass *klass) +{ + GObjectClass *object_class = G_OBJECT_CLASS (klass); + GimpContainerClass *container_class = GIMP_CONTAINER_CLASS (klass); + + object_class->constructed = gimp_filter_stack_constructed; + object_class->finalize = gimp_filter_stack_finalize; + + container_class->add = gimp_filter_stack_add; + container_class->remove = gimp_filter_stack_remove; + container_class->reorder = gimp_filter_stack_reorder; +} + +static void +gimp_filter_stack_init (GimpFilterStack *stack) +{ +} + +static void +gimp_filter_stack_constructed (GObject *object) +{ + GimpContainer *container = GIMP_CONTAINER (object); + + G_OBJECT_CLASS (parent_class)->constructed (object); + + gimp_assert (g_type_is_a (gimp_container_get_children_type (container), + GIMP_TYPE_FILTER)); + + gimp_container_add_handler (container, "active-changed", + G_CALLBACK (gimp_filter_stack_filter_active), + container); +} + +static void +gimp_filter_stack_finalize (GObject *object) +{ + GimpFilterStack *stack = GIMP_FILTER_STACK (object); + + g_clear_object (&stack->graph); + + G_OBJECT_CLASS (parent_class)->finalize (object); +} + +static void +gimp_filter_stack_add (GimpContainer *container, + GimpObject *object) +{ + GimpFilterStack *stack = GIMP_FILTER_STACK (container); + GimpFilter *filter = GIMP_FILTER (object); + + GIMP_CONTAINER_CLASS (parent_class)->add (container, object); + + if (gimp_filter_get_active (filter)) + { + if (stack->graph) + { + gegl_node_add_child (stack->graph, gimp_filter_get_node (filter)); + gimp_filter_stack_add_node (stack, filter); + } + + gimp_filter_stack_update_last_node (stack); + } +} + +static void +gimp_filter_stack_remove (GimpContainer *container, + GimpObject *object) +{ + GimpFilterStack *stack = GIMP_FILTER_STACK (container); + GimpFilter *filter = GIMP_FILTER (object); + + if (stack->graph && gimp_filter_get_active (filter)) + { + gimp_filter_stack_remove_node (stack, filter); + gegl_node_remove_child (stack->graph, gimp_filter_get_node (filter)); + } + + GIMP_CONTAINER_CLASS (parent_class)->remove (container, object); + + if (gimp_filter_get_active (filter)) + { + gimp_filter_set_is_last_node (filter, FALSE); + gimp_filter_stack_update_last_node (stack); + } +} + +static void +gimp_filter_stack_reorder (GimpContainer *container, + GimpObject *object, + gint new_index) +{ + GimpFilterStack *stack = GIMP_FILTER_STACK (container); + GimpFilter *filter = GIMP_FILTER (object); + + if (stack->graph && gimp_filter_get_active (filter)) + gimp_filter_stack_remove_node (stack, filter); + + GIMP_CONTAINER_CLASS (parent_class)->reorder (container, object, new_index); + + if (gimp_filter_get_active (filter)) + { + gimp_filter_stack_update_last_node (stack); + + if (stack->graph) + gimp_filter_stack_add_node (stack, filter); + } +} + + +/* public functions */ + +GimpContainer * +gimp_filter_stack_new (GType filter_type) +{ + g_return_val_if_fail (g_type_is_a (filter_type, GIMP_TYPE_FILTER), NULL); + + return g_object_new (GIMP_TYPE_FILTER_STACK, + "name", g_type_name (filter_type), + "children-type", filter_type, + "policy", GIMP_CONTAINER_POLICY_STRONG, + NULL); +} + +GeglNode * +gimp_filter_stack_get_graph (GimpFilterStack *stack) +{ + GList *list; + GeglNode *previous; + GeglNode *output; + + g_return_val_if_fail (GIMP_IS_FILTER_STACK (stack), NULL); + + if (stack->graph) + return stack->graph; + + stack->graph = gegl_node_new (); + + previous = gegl_node_get_input_proxy (stack->graph, "input"); + + for (list = GIMP_LIST (stack)->queue->tail; + list; + list = g_list_previous (list)) + { + GimpFilter *filter = list->data; + GeglNode *node; + + if (! gimp_filter_get_active (filter)) + continue; + + node = gimp_filter_get_node (filter); + + gegl_node_add_child (stack->graph, node); + + gegl_node_connect_to (previous, "output", + node, "input"); + + previous = node; + } + + output = gegl_node_get_output_proxy (stack->graph, "output"); + + gegl_node_connect_to (previous, "output", + output, "input"); + + return stack->graph; +} + + +/* private functions */ + +static void +gimp_filter_stack_add_node (GimpFilterStack *stack, + GimpFilter *filter) +{ + GeglNode *node; + GeglNode *node_above = NULL; + GeglNode *node_below = NULL; + GList *iter; + + node = gimp_filter_get_node (filter); + + + iter = g_list_find (GIMP_LIST (stack)->queue->head, filter); + + while ((iter = g_list_previous (iter))) + { + GimpFilter *filter_above = iter->data; + + if (gimp_filter_get_active (filter_above)) + { + node_above = gimp_filter_get_node (filter_above); + + break; + } + } + + if (! node_above) + node_above = gegl_node_get_output_proxy (stack->graph, "output"); + + node_below = gegl_node_get_producer (node_above, "input", NULL); + + gegl_node_connect_to (node_below, "output", + node, "input"); + gegl_node_connect_to (node, "output", + node_above, "input"); +} + +static void +gimp_filter_stack_remove_node (GimpFilterStack *stack, + GimpFilter *filter) +{ + GeglNode *node; + GeglNode *node_above = NULL; + GeglNode *node_below = NULL; + GList *iter; + + node = gimp_filter_get_node (filter); + + iter = g_list_find (GIMP_LIST (stack)->queue->head, filter); + + while ((iter = g_list_previous (iter))) + { + GimpFilter *filter_above = iter->data; + + if (gimp_filter_get_active (filter_above)) + { + node_above = gimp_filter_get_node (filter_above); + + break; + } + } + + if (! node_above) + node_above = gegl_node_get_output_proxy (stack->graph, "output"); + + node_below = gegl_node_get_producer (node, "input", NULL); + + gegl_node_disconnect (node, "input"); + + gegl_node_connect_to (node_below, "output", + node_above, "input"); +} + +static void +gimp_filter_stack_update_last_node (GimpFilterStack *stack) +{ + GList *list; + gboolean found_last = FALSE; + + for (list = GIMP_LIST (stack)->queue->tail; + list; + list = g_list_previous (list)) + { + GimpFilter *filter = list->data; + + if (! found_last && gimp_filter_get_active (filter)) + { + gimp_filter_set_is_last_node (filter, TRUE); + found_last = TRUE; + } + else + { + gimp_filter_set_is_last_node (filter, FALSE); + } + } +} + +static void +gimp_filter_stack_filter_active (GimpFilter *filter, + GimpFilterStack *stack) +{ + if (stack->graph) + { + if (gimp_filter_get_active (filter)) + { + gegl_node_add_child (stack->graph, gimp_filter_get_node (filter)); + gimp_filter_stack_add_node (stack, filter); + } + else + { + gimp_filter_stack_remove_node (stack, filter); + gegl_node_remove_child (stack->graph, gimp_filter_get_node (filter)); + } + } + + gimp_filter_stack_update_last_node (stack); + + if (! gimp_filter_get_active (filter)) + gimp_filter_set_is_last_node (filter, FALSE); +} |