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gimp/app/core/gimpgrouplayer.c

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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* GimpGroupLayer
* Copyright (C) 2009 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 <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <string.h>
#include <gegl.h>
#include "libgimpbase/gimpbase.h"
#include "libgimpmath/gimpmath.h"
#include "core-types.h"
#include "base/tile-manager.h"
#include "gimpgrouplayer.h"
#include "gimpimage.h"
#include "gimpimage-undo-push.h"
#include "gimpdrawable-private.h" /* eek */
#include "gimpdrawablestack.h"
#include "gimppickable.h"
#include "gimpprojectable.h"
#include "gimpprojection.h"
#include "gimp-intl.h"
typedef struct _GimpGroupLayerPrivate GimpGroupLayerPrivate;
struct _GimpGroupLayerPrivate
{
GimpContainer *children;
GimpProjection *projection;
GeglNode *graph;
GeglNode *offset_node;
gint suspend_resize;
/* hackish temp states to make the projection/tiles stuff work */
gboolean reallocate_projection;
gint reallocate_width;
gint reallocate_height;
};
#define GET_PRIVATE(item) G_TYPE_INSTANCE_GET_PRIVATE (item, \
GIMP_TYPE_GROUP_LAYER, \
GimpGroupLayerPrivate)
static void gimp_projectable_iface_init (GimpProjectableInterface *iface);
static void gimp_group_layer_finalize (GObject *object);
static void gimp_group_layer_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void gimp_group_layer_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static gint64 gimp_group_layer_get_memsize (GimpObject *object,
gint64 *gui_size);
static gboolean gimp_group_layer_get_size (GimpViewable *viewable,
gint *width,
gint *height);
static GimpContainer * gimp_group_layer_get_children (GimpViewable *viewable);
static GimpItem * gimp_group_layer_duplicate (GimpItem *item,
GType new_type);
static void gimp_group_layer_convert (GimpItem *item,
GimpImage *dest_image);
static void gimp_group_layer_translate (GimpItem *item,
gint offset_x,
gint offset_y,
gboolean push_undo);
static void gimp_group_layer_scale (GimpItem *item,
gint new_width,
gint new_height,
gint new_offset_x,
gint new_offset_y,
GimpInterpolationType interp_type,
GimpProgress *progress);
static void gimp_group_layer_resize (GimpItem *item,
GimpContext *context,
gint new_width,
gint new_height,
gint offset_x,
gint offset_y);
static void gimp_group_layer_flip (GimpItem *item,
GimpContext *context,
GimpOrientationType flip_type,
gdouble axis,
gboolean clip_result);
static void gimp_group_layer_rotate (GimpItem *item,
GimpContext *context,
GimpRotationType rotate_type,
gdouble center_x,
gdouble center_y,
gboolean clip_result);
static void gimp_group_layer_transform (GimpItem *item,
GimpContext *context,
const GimpMatrix3 *matrix,
GimpTransformDirection direction,
GimpInterpolationType interpolation_type,
gint recursion_level,
GimpTransformResize clip_result,
GimpProgress *progress);
static gint64 gimp_group_layer_estimate_memsize (const GimpDrawable *drawable,
gint width,
gint height);
static void gimp_group_layer_convert_type (GimpDrawable *drawable,
GimpImage *dest_image,
GimpImageBaseType new_base_type,
gboolean push_undo);
static GeglNode * gimp_group_layer_get_graph (GimpProjectable *projectable);
static GList * gimp_group_layer_get_layers (GimpProjectable *projectable);
static void gimp_group_layer_child_add (GimpContainer *container,
GimpLayer *child,
GimpGroupLayer *group);
static void gimp_group_layer_child_remove (GimpContainer *container,
GimpLayer *child,
GimpGroupLayer *group);
static void gimp_group_layer_child_move (GimpLayer *child,
GParamSpec *pspec,
GimpGroupLayer *group);
static void gimp_group_layer_child_resize (GimpLayer *child,
GimpGroupLayer *group);
static void gimp_group_layer_update (GimpGroupLayer *group);
static void gimp_group_layer_update_size (GimpGroupLayer *group);
static void gimp_group_layer_stack_update (GimpDrawableStack *stack,
gint x,
gint y,
gint width,
gint height,
GimpGroupLayer *group);
static void gimp_group_layer_proj_update (GimpProjection *proj,
gboolean now,
gint x,
gint y,
gint width,
gint height,
GimpGroupLayer *group);
G_DEFINE_TYPE_WITH_CODE (GimpGroupLayer, gimp_group_layer, GIMP_TYPE_LAYER,
G_IMPLEMENT_INTERFACE (GIMP_TYPE_PROJECTABLE,
gimp_projectable_iface_init))
#define parent_class gimp_group_layer_parent_class
static void
gimp_group_layer_class_init (GimpGroupLayerClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GimpObjectClass *gimp_object_class = GIMP_OBJECT_CLASS (klass);
GimpViewableClass *viewable_class = GIMP_VIEWABLE_CLASS (klass);
GimpItemClass *item_class = GIMP_ITEM_CLASS (klass);
GimpDrawableClass *drawable_class = GIMP_DRAWABLE_CLASS (klass);
object_class->set_property = gimp_group_layer_set_property;
object_class->get_property = gimp_group_layer_get_property;
object_class->finalize = gimp_group_layer_finalize;
gimp_object_class->get_memsize = gimp_group_layer_get_memsize;
viewable_class->default_stock_id = "gtk-directory";
viewable_class->get_size = gimp_group_layer_get_size;
viewable_class->get_children = gimp_group_layer_get_children;
item_class->duplicate = gimp_group_layer_duplicate;
item_class->convert = gimp_group_layer_convert;
item_class->translate = gimp_group_layer_translate;
item_class->scale = gimp_group_layer_scale;
item_class->resize = gimp_group_layer_resize;
item_class->flip = gimp_group_layer_flip;
item_class->rotate = gimp_group_layer_rotate;
item_class->transform = gimp_group_layer_transform;
item_class->default_name = _("Layer Group");
item_class->rename_desc = C_("undo-type", "Rename Layer Group");
item_class->translate_desc = C_("undo-type", "Move Layer Group");
item_class->scale_desc = C_("undo-type", "Scale Layer Group");
item_class->resize_desc = C_("undo-type", "Resize Layer Group");
item_class->flip_desc = C_("undo-type", "Flip Layer Group");
item_class->rotate_desc = C_("undo-type", "Rotate Layer Group");
item_class->transform_desc = C_("undo-type", "Transform Layer Group");
drawable_class->estimate_memsize = gimp_group_layer_estimate_memsize;
drawable_class->convert_type = gimp_group_layer_convert_type;
g_type_class_add_private (klass, sizeof (GimpGroupLayerPrivate));
}
static void
gimp_projectable_iface_init (GimpProjectableInterface *iface)
{
iface->get_image = (GimpImage * (*) (GimpProjectable *)) gimp_item_get_image;
iface->get_image_type = (GimpImageType (*) (GimpProjectable *)) gimp_drawable_type;
iface->get_offset = (void (*) (GimpProjectable*, gint*, gint*)) gimp_item_get_offset;
iface->get_size = (void (*) (GimpProjectable*, gint*, gint*)) gimp_viewable_get_size;
iface->get_graph = gimp_group_layer_get_graph;
iface->invalidate_preview = (void (*) (GimpProjectable*)) gimp_viewable_invalidate_preview;
iface->get_layers = gimp_group_layer_get_layers;
iface->get_channels = NULL;
}
static void
gimp_group_layer_init (GimpGroupLayer *group)
{
GimpGroupLayerPrivate *private = GET_PRIVATE (group);
private->children = gimp_drawable_stack_new (GIMP_TYPE_LAYER);
g_signal_connect (private->children, "add",
G_CALLBACK (gimp_group_layer_child_add),
group);
g_signal_connect (private->children, "remove",
G_CALLBACK (gimp_group_layer_child_remove),
group);
gimp_container_add_handler (private->children, "notify::offset-x",
G_CALLBACK (gimp_group_layer_child_move),
group);
gimp_container_add_handler (private->children, "notify::offset-y",
G_CALLBACK (gimp_group_layer_child_move),
group);
gimp_container_add_handler (private->children, "size-changed",
G_CALLBACK (gimp_group_layer_child_resize),
group);
g_signal_connect (private->children, "update",
G_CALLBACK (gimp_group_layer_stack_update),
group);
private->projection = gimp_projection_new (GIMP_PROJECTABLE (group));
g_signal_connect (private->projection, "update",
G_CALLBACK (gimp_group_layer_proj_update),
group);
}
static void
gimp_group_layer_finalize (GObject *object)
{
GimpGroupLayerPrivate *private = GET_PRIVATE (object);
if (private->children)
{
g_signal_handlers_disconnect_by_func (private->children,
gimp_group_layer_child_add,
object);
g_signal_handlers_disconnect_by_func (private->children,
gimp_group_layer_child_remove,
object);
g_signal_handlers_disconnect_by_func (private->children,
gimp_group_layer_stack_update,
object);
g_object_unref (private->children);
private->children = NULL;
}
if (private->projection)
{
g_object_unref (private->projection);
private->projection = NULL;
}
if (private->graph)
{
g_object_unref (private->graph);
private->graph = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gimp_group_layer_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
switch (property_id)
{
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_group_layer_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
switch (property_id)
{
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static gint64
gimp_group_layer_get_memsize (GimpObject *object,
gint64 *gui_size)
{
GimpGroupLayerPrivate *private = GET_PRIVATE (object);
gint64 memsize = 0;
memsize += gimp_object_get_memsize (GIMP_OBJECT (private->children), gui_size);
memsize += gimp_object_get_memsize (GIMP_OBJECT (private->projection), gui_size);
return memsize + GIMP_OBJECT_CLASS (parent_class)->get_memsize (object,
gui_size);
}
static gboolean
gimp_group_layer_get_size (GimpViewable *viewable,
gint *width,
gint *height)
{
GimpGroupLayerPrivate *private = GET_PRIVATE (viewable);
if (private->reallocate_width != 0 &&
private->reallocate_height != 0)
{
*width = private->reallocate_width;
*height = private->reallocate_height;
return TRUE;
}
return GIMP_VIEWABLE_CLASS (parent_class)->get_size (viewable, width, height);
}
static GimpContainer *
gimp_group_layer_get_children (GimpViewable *viewable)
{
return GET_PRIVATE (viewable)->children;
}
static GimpItem *
gimp_group_layer_duplicate (GimpItem *item,
GType new_type)
{
GimpItem *new_item;
g_return_val_if_fail (g_type_is_a (new_type, GIMP_TYPE_DRAWABLE), NULL);
new_item = GIMP_ITEM_CLASS (parent_class)->duplicate (item, new_type);
if (GIMP_IS_GROUP_LAYER (new_item))
{
GimpGroupLayerPrivate *private = GET_PRIVATE (item);
GimpGroupLayer *new_group = GIMP_GROUP_LAYER (new_item);
GimpGroupLayerPrivate *new_private = GET_PRIVATE (new_item);
gint position = 0;
GList *list;
gimp_group_layer_suspend_resize (new_group, FALSE);
for (list = gimp_item_stack_get_item_iter (GIMP_ITEM_STACK (private->children));
list;
list = g_list_next (list))
{
GimpItem *child = list->data;
GimpItem *new_child;
GimpLayerMask *mask;
new_child = gimp_item_duplicate (child, G_TYPE_FROM_INSTANCE (child));
gimp_object_set_name (GIMP_OBJECT (new_child),
gimp_object_get_name (child));
mask = gimp_layer_get_mask (GIMP_LAYER (child));
if (mask)
{
GimpLayerMask *new_mask;
new_mask = gimp_layer_get_mask (GIMP_LAYER (new_child));
gimp_object_set_name (GIMP_OBJECT (new_mask),
gimp_object_get_name (mask));
}
gimp_viewable_set_parent (GIMP_VIEWABLE (new_child),
GIMP_VIEWABLE (new_group));
gimp_container_insert (new_private->children,
GIMP_OBJECT (new_child),
position++);
}
/* force the projection to reallocate itself */
GET_PRIVATE (new_group)->reallocate_projection = TRUE;
gimp_group_layer_resume_resize (new_group, FALSE);
}
return new_item;
}
static void
gimp_group_layer_convert (GimpItem *item,
GimpImage *dest_image)
{
GimpGroupLayerPrivate *private = GET_PRIVATE (item);
GList *list;
for (list = gimp_item_stack_get_item_iter (GIMP_ITEM_STACK (private->children));
list;
list = g_list_next (list))
{
GimpItem *child = list->data;
GIMP_ITEM_GET_CLASS (child)->convert (child, dest_image);
}
GIMP_ITEM_CLASS (parent_class)->convert (item, dest_image);
}
static void
gimp_group_layer_translate (GimpItem *item,
gint offset_x,
gint offset_y,
gboolean push_undo)
{
GimpGroupLayer *group = GIMP_GROUP_LAYER (item);
GimpGroupLayerPrivate *private = GET_PRIVATE (item);
GimpLayerMask *mask;
GList *list;
/* don't push an undo here because undo will call us again */
gimp_group_layer_suspend_resize (group, FALSE);
for (list = gimp_item_stack_get_item_iter (GIMP_ITEM_STACK (private->children));
list;
list = g_list_next (list))
{
GimpItem *child = list->data;
gimp_item_translate (child, offset_x, offset_y, push_undo);
}
mask = gimp_layer_get_mask (GIMP_LAYER (group));
if (mask)
{
gint off_x, off_y;
gimp_item_get_offset (item, &off_x, &off_y);
gimp_item_set_offset (GIMP_ITEM (mask), off_x, off_y);
gimp_viewable_invalidate_preview (GIMP_VIEWABLE (mask));
}
/* don't push an undo here because undo will call us again */
gimp_group_layer_resume_resize (group, FALSE);
}
static void
gimp_group_layer_scale (GimpItem *item,
gint new_width,
gint new_height,
gint new_offset_x,
gint new_offset_y,
GimpInterpolationType interpolation_type,
GimpProgress *progress)
{
GimpGroupLayer *group = GIMP_GROUP_LAYER (item);
GimpGroupLayerPrivate *private = GET_PRIVATE (item);
GimpLayerMask *mask;
GList *list;
gdouble width_factor;
gdouble height_factor;
gint old_offset_x;
gint old_offset_y;
width_factor = (gdouble) new_width / (gdouble) gimp_item_get_width (item);
height_factor = (gdouble) new_height / (gdouble) gimp_item_get_height (item);
old_offset_x = gimp_item_get_offset_x (item);
old_offset_y = gimp_item_get_offset_y (item);
gimp_group_layer_suspend_resize (group, TRUE);
list = gimp_item_stack_get_item_iter (GIMP_ITEM_STACK (private->children));
while (list)
{
GimpItem *child = list->data;
gint child_width;
gint child_height;
gint child_offset_x;
gint child_offset_y;
list = g_list_next (list);
child_width = ROUND (width_factor * gimp_item_get_width (child));
child_height = ROUND (height_factor * gimp_item_get_height (child));
child_offset_x = ROUND (width_factor * (gimp_item_get_offset_x (child) -
old_offset_x));
child_offset_y = ROUND (height_factor * (gimp_item_get_offset_y (child) -
old_offset_y));
child_offset_x += new_offset_x;
child_offset_y += new_offset_y;
if (child_width > 0 && child_height > 0)
{
gimp_item_scale (child,
child_width, child_height,
child_offset_x, child_offset_y,
interpolation_type, progress);
}
else if (gimp_item_is_attached (item))
{
gimp_image_remove_layer (gimp_item_get_image (item),
GIMP_LAYER (child),
TRUE, NULL);
}
else
{
gimp_container_remove (private->children, GIMP_OBJECT (child));
}
}
mask = gimp_layer_get_mask (GIMP_LAYER (group));
if (mask)
gimp_item_scale (GIMP_ITEM (mask),
new_width, new_height,
new_offset_x, new_offset_y,
interpolation_type, progress);
gimp_group_layer_resume_resize (group, TRUE);
}
static void
gimp_group_layer_resize (GimpItem *item,
GimpContext *context,
gint new_width,
gint new_height,
gint offset_x,
gint offset_y)
{
GimpGroupLayer *group = GIMP_GROUP_LAYER (item);
GimpGroupLayerPrivate *private = GET_PRIVATE (item);
GimpLayerMask *mask;
GList *list;
gint x, y;
x = gimp_item_get_offset_x (item) - offset_x;
y = gimp_item_get_offset_y (item) - offset_y;
gimp_group_layer_suspend_resize (group, TRUE);
list = gimp_item_stack_get_item_iter (GIMP_ITEM_STACK (private->children));
while (list)
{
GimpItem *child = list->data;
gint child_width;
gint child_height;
gint child_x;
gint child_y;
list = g_list_next (list);
if (gimp_rectangle_intersect (x,
y,
new_width,
new_height,
gimp_item_get_offset_x (child),
gimp_item_get_offset_y (child),
gimp_item_get_width (child),
gimp_item_get_height (child),
&child_x,
&child_y,
&child_width,
&child_height))
{
gint child_offset_x = gimp_item_get_offset_x (child) - child_x;
gint child_offset_y = gimp_item_get_offset_y (child) - child_y;
gimp_item_resize (child, context,
child_width, child_height,
child_offset_x, child_offset_y);
}
else if (gimp_item_is_attached (item))
{
gimp_image_remove_layer (gimp_item_get_image (item),
GIMP_LAYER (child),
TRUE, NULL);
}
else
{
gimp_container_remove (private->children, GIMP_OBJECT (child));
}
}
mask = gimp_layer_get_mask (GIMP_LAYER (group));
if (mask)
gimp_item_resize (GIMP_ITEM (mask), context,
new_width, new_height, offset_x, offset_y);
gimp_group_layer_resume_resize (group, TRUE);
}
static void
gimp_group_layer_flip (GimpItem *item,
GimpContext *context,
GimpOrientationType flip_type,
gdouble axis,
gboolean clip_result)
{
GimpGroupLayer *group = GIMP_GROUP_LAYER (item);
GimpGroupLayerPrivate *private = GET_PRIVATE (item);
GimpLayerMask *mask;
GList *list;
gimp_group_layer_suspend_resize (group, TRUE);
for (list = gimp_item_stack_get_item_iter (GIMP_ITEM_STACK (private->children));
list;
list = g_list_next (list))
{
GimpItem *child = list->data;
gimp_item_flip (child, context,
flip_type, axis, clip_result);
}
mask = gimp_layer_get_mask (GIMP_LAYER (group));
if (mask)
gimp_item_flip (GIMP_ITEM (mask), context,
flip_type, axis, clip_result);
gimp_group_layer_resume_resize (group, TRUE);
}
static void
gimp_group_layer_rotate (GimpItem *item,
GimpContext *context,
GimpRotationType rotate_type,
gdouble center_x,
gdouble center_y,
gboolean clip_result)
{
GimpGroupLayer *group = GIMP_GROUP_LAYER (item);
GimpGroupLayerPrivate *private = GET_PRIVATE (item);
GimpLayerMask *mask;
GList *list;
gimp_group_layer_suspend_resize (group, TRUE);
for (list = gimp_item_stack_get_item_iter (GIMP_ITEM_STACK (private->children));
list;
list = g_list_next (list))
{
GimpItem *child = list->data;
gimp_item_rotate (child, context,
rotate_type, center_x, center_y, clip_result);
}
mask = gimp_layer_get_mask (GIMP_LAYER (group));
if (mask)
gimp_item_rotate (GIMP_ITEM (mask), context,
rotate_type, center_x, center_y, clip_result);
gimp_group_layer_resume_resize (group, TRUE);
}
static void
gimp_group_layer_transform (GimpItem *item,
GimpContext *context,
const GimpMatrix3 *matrix,
GimpTransformDirection direction,
GimpInterpolationType interpolation_type,
gint recursion_level,
GimpTransformResize clip_result,
GimpProgress *progress)
{
GimpGroupLayer *group = GIMP_GROUP_LAYER (item);
GimpGroupLayerPrivate *private = GET_PRIVATE (item);
GimpLayerMask *mask;
GList *list;
gimp_group_layer_suspend_resize (group, TRUE);
for (list = gimp_item_stack_get_item_iter (GIMP_ITEM_STACK (private->children));
list;
list = g_list_next (list))
{
GimpItem *child = list->data;
gimp_item_transform (child, context,
matrix, direction,
interpolation_type, recursion_level,
clip_result, progress);
}
mask = gimp_layer_get_mask (GIMP_LAYER (group));
if (mask)
gimp_item_transform (GIMP_ITEM (mask), context,
matrix, direction,
interpolation_type, recursion_level,
clip_result, progress);
gimp_group_layer_resume_resize (group, TRUE);
}
static gint64
gimp_group_layer_estimate_memsize (const GimpDrawable *drawable,
gint width,
gint height)
{
GimpGroupLayerPrivate *private = GET_PRIVATE (drawable);
GList *list;
GimpImageBaseType base_type;
gint64 memsize = 0;
for (list = gimp_item_stack_get_item_iter (GIMP_ITEM_STACK (private->children));
list;
list = g_list_next (list))
{
GimpDrawable *child = list->data;
gint child_width;
gint child_height;
child_width = (gimp_item_get_width (GIMP_ITEM (child)) *
width /
gimp_item_get_width (GIMP_ITEM (drawable)));
child_height = (gimp_item_get_height (GIMP_ITEM (child)) *
height /
gimp_item_get_height (GIMP_ITEM (drawable)));
memsize += gimp_drawable_estimate_memsize (child,
child_width,
child_height);
}
base_type = GIMP_IMAGE_TYPE_BASE_TYPE (gimp_drawable_type (drawable));
memsize += gimp_projection_estimate_memsize (base_type, width, height);
return memsize + GIMP_DRAWABLE_CLASS (parent_class)->estimate_memsize (drawable,
width,
height);
}
static void
gimp_group_layer_convert_type (GimpDrawable *drawable,
GimpImage *dest_image,
GimpImageBaseType new_base_type,
gboolean push_undo)
{
GimpGroupLayer *group = GIMP_GROUP_LAYER (drawable);
GimpGroupLayerPrivate *private = GET_PRIVATE (drawable);
TileManager *tiles;
GimpImageType new_type;
if (push_undo)
{
GimpImage *image = gimp_item_get_image (GIMP_ITEM (group));
gimp_image_undo_push_group_layer_convert (image, NULL, group);
}
new_type = GIMP_IMAGE_TYPE_FROM_BASE_TYPE (new_base_type);
if (gimp_drawable_has_alpha (drawable))
new_type = GIMP_IMAGE_TYPE_WITH_ALPHA (new_type);
/* FIXME: find a better way to do this: need to set the drawable's
* type to the new values so the projection will create its tiles
* with the right depth
*/
drawable->private->type = new_type;
gimp_projectable_structure_changed (GIMP_PROJECTABLE (drawable));
tiles = gimp_projection_get_tiles_at_level (private->projection,
0, NULL);
gimp_drawable_set_tiles_full (drawable,
FALSE, NULL,
tiles, new_type,
gimp_item_get_offset_x (GIMP_ITEM (drawable)),
gimp_item_get_offset_y (GIMP_ITEM (drawable)));
}
static GeglNode *
gimp_group_layer_get_graph (GimpProjectable *projectable)
{
GimpGroupLayer *group = GIMP_GROUP_LAYER (projectable);
GimpGroupLayerPrivate *private = GET_PRIVATE (projectable);
GeglNode *layers_node;
GeglNode *output;
gint off_x;
gint off_y;
if (private->graph)
return private->graph;
private->graph = gegl_node_new ();
layers_node =
gimp_drawable_stack_get_graph (GIMP_DRAWABLE_STACK (private->children));
gegl_node_add_child (private->graph, layers_node);
gimp_item_get_offset (GIMP_ITEM (group), &off_x, &off_y);
private->offset_node = gegl_node_new_child (private->graph,
"operation", "gegl:translate",
"x", (gdouble) -off_x,
"y", (gdouble) -off_y,
NULL);
gegl_node_connect_to (layers_node, "output",
private->offset_node, "input");
output = gegl_node_get_output_proxy (private->graph, "output");
gegl_node_connect_to (private->offset_node, "output",
output, "input");
return private->graph;
}
static GList *
gimp_group_layer_get_layers (GimpProjectable *projectable)
{
GimpGroupLayerPrivate *private = GET_PRIVATE (projectable);
return gimp_item_stack_get_item_iter (GIMP_ITEM_STACK (private->children));
}
/* public functions */
GimpLayer *
gimp_group_layer_new (GimpImage *image)
{
GimpGroupLayer *group;
GimpImageType type;
g_return_val_if_fail (GIMP_IS_IMAGE (image), NULL);
type = gimp_image_base_type_with_alpha (image);
group = GIMP_GROUP_LAYER (gimp_drawable_new (GIMP_TYPE_GROUP_LAYER,
image, NULL,
0, 0, 1, 1,
type));
if (gimp_image_get_projection (image)->use_gegl)
GET_PRIVATE (group)->projection->use_gegl = TRUE;
return GIMP_LAYER (group);
}
GimpProjection *
gimp_group_layer_get_projection (GimpGroupLayer *group)
{
g_return_val_if_fail (GIMP_IS_GROUP_LAYER (group), NULL);
return GET_PRIVATE (group)->projection;
}
void
gimp_group_layer_suspend_resize (GimpGroupLayer *group,
gboolean push_undo)
{
GimpItem *item;
g_return_if_fail (GIMP_IS_GROUP_LAYER (group));
item = GIMP_ITEM (group);
if (! gimp_item_is_attached (item))
push_undo = FALSE;
if (push_undo)
gimp_image_undo_push_group_layer_suspend (gimp_item_get_image (item),
NULL, group);
GET_PRIVATE (group)->suspend_resize++;
}
void
gimp_group_layer_resume_resize (GimpGroupLayer *group,
gboolean push_undo)
{
GimpGroupLayerPrivate *private;
GimpItem *item;
g_return_if_fail (GIMP_IS_GROUP_LAYER (group));
private = GET_PRIVATE (group);
g_return_if_fail (private->suspend_resize > 0);
item = GIMP_ITEM (group);
if (! gimp_item_is_attached (item))
push_undo = FALSE;
if (push_undo)
gimp_image_undo_push_group_layer_resume (gimp_item_get_image (item),
NULL, group);
private->suspend_resize--;
if (private->suspend_resize == 0)
{
gimp_group_layer_update_size (group);
}
}
/* private functions */
static void
gimp_group_layer_child_add (GimpContainer *container,
GimpLayer *child,
GimpGroupLayer *group)
{
gimp_group_layer_update (group);
}
static void
gimp_group_layer_child_remove (GimpContainer *container,
GimpLayer *child,
GimpGroupLayer *group)
{
gimp_group_layer_update (group);
}
static void
gimp_group_layer_child_move (GimpLayer *child,
GParamSpec *pspec,
GimpGroupLayer *group)
{
gimp_group_layer_update (group);
}
static void
gimp_group_layer_child_resize (GimpLayer *child,
GimpGroupLayer *group)
{
gimp_group_layer_update (group);
}
static void
gimp_group_layer_update (GimpGroupLayer *group)
{
if (GET_PRIVATE (group)->suspend_resize == 0)
{
gimp_group_layer_update_size (group);
}
}
static void
gimp_group_layer_update_size (GimpGroupLayer *group)
{
GimpGroupLayerPrivate *private = GET_PRIVATE (group);
GimpItem *item = GIMP_ITEM (group);
gint old_x = gimp_item_get_offset_x (item);
gint old_y = gimp_item_get_offset_y (item);
gint old_width = gimp_item_get_width (item);
gint old_height = gimp_item_get_height (item);
gint x = 0;
gint y = 0;
gint width = 1;
gint height = 1;
gboolean first = TRUE;
GList *list;
for (list = gimp_item_stack_get_item_iter (GIMP_ITEM_STACK (private->children));
list;
list = g_list_next (list))
{
GimpItem *child = list->data;
if (first)
{
x = gimp_item_get_offset_x (child);
y = gimp_item_get_offset_y (child);
width = gimp_item_get_width (child);
height = gimp_item_get_height (child);
first = FALSE;
}
else
{
gimp_rectangle_union (x, y, width, height,
gimp_item_get_offset_x (child),
gimp_item_get_offset_y (child),
gimp_item_get_width (child),
gimp_item_get_height (child),
&x, &y, &width, &height);
}
}
if (private->reallocate_projection ||
x != old_x ||
y != old_y ||
width != old_width ||
height != old_height)
{
if (private->reallocate_projection ||
width != old_width ||
height != old_height)
{
TileManager *tiles;
private->reallocate_projection = FALSE;
/* temporarily change the return values of gimp_viewable_get_size()
* so the projection allocates itself correctly
*/
private->reallocate_width = width;
private->reallocate_height = height;
gimp_projectable_structure_changed (GIMP_PROJECTABLE (group));
tiles = gimp_projection_get_tiles_at_level (private->projection,
0, NULL);
private->reallocate_width = 0;
private->reallocate_height = 0;
gimp_drawable_set_tiles_full (GIMP_DRAWABLE (group),
FALSE, NULL,
tiles,
gimp_drawable_type (GIMP_DRAWABLE (group)),
x, y);
}
else
{
gimp_item_set_offset (item, x, y);
/* invalidate the entire projection since the position of
* the children relative to each other might have changed
* in a way that happens to leave the group's width and
* height the same
*/
gimp_projectable_invalidate (GIMP_PROJECTABLE (group),
x, y, width, height);
}
if (private->offset_node)
gegl_node_set (private->offset_node,
"x", (gdouble) -x,
"y", (gdouble) -y,
NULL);
}
}
static void
gimp_group_layer_stack_update (GimpDrawableStack *stack,
gint x,
gint y,
gint width,
gint height,
GimpGroupLayer *group)
{
#if 0
g_printerr ("%s (%s) %d, %d (%d, %d)\n",
G_STRFUNC, gimp_object_get_name (group),
x, y, width, height);
#endif
/* the layer stack's update signal speaks in image coordinates,
* pass to the projection as-is.
*/
gimp_projectable_invalidate (GIMP_PROJECTABLE (group),
x, y, width, height);
/* flush the pickable not the projectable because flushing the
* pickable will finish all invalidation on the projection so it
* can be used as source (note that it will still be constructed
* when the actual read happens, so this it not a performance
* problem)
*/
gimp_pickable_flush (GIMP_PICKABLE (GET_PRIVATE (group)->projection));
}
static void
gimp_group_layer_proj_update (GimpProjection *proj,
gboolean now,
gint x,
gint y,
gint width,
gint height,
GimpGroupLayer *group)
{
#if 0
g_printerr ("%s (%s) %d, %d (%d, %d)\n",
G_STRFUNC, gimp_object_get_name (group),
x, y, width, height);
#endif
/* the projection speaks in image coordinates, transform to layer
* coordinates when emitting our own update signal.
*/
gimp_drawable_update (GIMP_DRAWABLE (group),
x - gimp_item_get_offset_x (GIMP_ITEM (group)),
y - gimp_item_get_offset_y (GIMP_ITEM (group)),
width, height);
}
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