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gimp/app/core/gimplayer.c

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/* 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 <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <stdlib.h>
#include <string.h>
#include <cairo.h>
#include <gegl.h>
#include "libgimpbase/gimpbase.h"
#include "libgimpcolor/gimpcolor.h"
#include "libgimpmath/gimpmath.h"
#include "core-types.h"
#include "gegl/gimp-gegl-nodes.h"
#include "gegl/gimp-gegl-utils.h"
#include "gimp-apply-operation.h"
#include "gimpboundary.h"
#include "gimpchannel-select.h"
#include "gimpcontext.h"
#include "gimpcontainer.h"
#include "gimpdrawable-convert.h"
#include "gimpdrawable-operation.h"
#include "gimperror.h"
#include "gimpimage-undo-push.h"
#include "gimpimage-undo.h"
#include "gimpimage.h"
#include "gimplayer-floating-sel.h"
#include "gimplayer.h"
#include "gimplayer-project.h"
#include "gimplayermask.h"
#include "gimpmarshal.h"
#include "gimppickable.h"
#include "gimp-intl.h"
enum
{
OPACITY_CHANGED,
MODE_CHANGED,
LOCK_ALPHA_CHANGED,
MASK_CHANGED,
APPLY_MASK_CHANGED,
EDIT_MASK_CHANGED,
SHOW_MASK_CHANGED,
LAST_SIGNAL
};
enum
{
PROP_0,
PROP_OPACITY,
PROP_MODE,
PROP_LOCK_ALPHA,
PROP_MASK,
PROP_FLOATING_SELECTION
};
static void gimp_layer_pickable_iface_init (GimpPickableInterface *iface);
static void gimp_layer_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void gimp_layer_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static void gimp_layer_dispose (GObject *object);
static void gimp_layer_finalize (GObject *object);
static void gimp_layer_name_changed (GimpObject *object);
static gint64 gimp_layer_get_memsize (GimpObject *object,
gint64 *gui_size);
static void gimp_layer_invalidate_preview (GimpViewable *viewable);
static gchar * gimp_layer_get_description (GimpViewable *viewable,
gchar **tooltip);
static void gimp_layer_removed (GimpItem *item);
static void gimp_layer_unset_removed (GimpItem *item);
static gboolean gimp_layer_is_attached (const GimpItem *item);
static GimpItemTree * gimp_layer_get_tree (GimpItem *item);
static GimpItem * gimp_layer_duplicate (GimpItem *item,
GType new_type);
static void gimp_layer_convert (GimpItem *item,
GimpImage *dest_image);
static gboolean gimp_layer_rename (GimpItem *item,
const gchar *new_name,
const gchar *undo_desc,
GError **error);
static void gimp_layer_translate (GimpItem *item,
gint offset_x,
gint offset_y,
gboolean push_undo);
static void gimp_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_layer_resize (GimpItem *item,
GimpContext *context,
gint new_width,
gint new_height,
gint offset_x,
gint offset_y);
static void gimp_layer_flip (GimpItem *item,
GimpContext *context,
GimpOrientationType flip_type,
gdouble axis,
gboolean clip_result);
static void gimp_layer_rotate (GimpItem *item,
GimpContext *context,
GimpRotationType rotate_type,
gdouble center_x,
gdouble center_y,
gboolean clip_result);
static void gimp_layer_transform (GimpItem *item,
GimpContext *context,
const GimpMatrix3 *matrix,
GimpTransformDirection direction,
GimpInterpolationType interpolation_type,
gint recursion_level,
GimpTransformResize clip_result,
GimpProgress *progress);
static void gimp_layer_to_selection (GimpItem *item,
GimpChannelOps op,
gboolean antialias,
gboolean feather,
gdouble feather_radius_x,
gdouble feather_radius_y);
static GeglNode * gimp_layer_get_node (GimpItem *item);
static gint64 gimp_layer_estimate_memsize (const GimpDrawable *drawable,
gint width,
gint height);
static void gimp_layer_invalidate_boundary (GimpDrawable *drawable);
static void gimp_layer_get_active_components (const GimpDrawable *drawable,
gboolean *active);
static gint gimp_layer_get_opacity_at (GimpPickable *pickable,
gint x,
gint y);
static void gimp_layer_layer_mask_update (GimpDrawable *layer_mask,
gint x,
gint y,
gint width,
gint height,
GimpLayer *layer);
G_DEFINE_TYPE_WITH_CODE (GimpLayer, gimp_layer, GIMP_TYPE_DRAWABLE,
G_IMPLEMENT_INTERFACE (GIMP_TYPE_PICKABLE,
gimp_layer_pickable_iface_init))
#define parent_class gimp_layer_parent_class
static guint layer_signals[LAST_SIGNAL] = { 0 };
static void
gimp_layer_class_init (GimpLayerClass *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);
layer_signals[OPACITY_CHANGED] =
g_signal_new ("opacity-changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpLayerClass, opacity_changed),
NULL, NULL,
gimp_marshal_VOID__VOID,
G_TYPE_NONE, 0);
layer_signals[MODE_CHANGED] =
g_signal_new ("mode-changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpLayerClass, mode_changed),
NULL, NULL,
gimp_marshal_VOID__VOID,
G_TYPE_NONE, 0);
layer_signals[LOCK_ALPHA_CHANGED] =
g_signal_new ("lock-alpha-changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpLayerClass, lock_alpha_changed),
NULL, NULL,
gimp_marshal_VOID__VOID,
G_TYPE_NONE, 0);
layer_signals[MASK_CHANGED] =
g_signal_new ("mask-changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpLayerClass, mask_changed),
NULL, NULL,
gimp_marshal_VOID__VOID,
G_TYPE_NONE, 0);
layer_signals[APPLY_MASK_CHANGED] =
g_signal_new ("apply-mask-changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpLayerClass, apply_mask_changed),
NULL, NULL,
gimp_marshal_VOID__VOID,
G_TYPE_NONE, 0);
layer_signals[EDIT_MASK_CHANGED] =
g_signal_new ("edit-mask-changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpLayerClass, edit_mask_changed),
NULL, NULL,
gimp_marshal_VOID__VOID,
G_TYPE_NONE, 0);
layer_signals[SHOW_MASK_CHANGED] =
g_signal_new ("show-mask-changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpLayerClass, show_mask_changed),
NULL, NULL,
gimp_marshal_VOID__VOID,
G_TYPE_NONE, 0);
object_class->set_property = gimp_layer_set_property;
object_class->get_property = gimp_layer_get_property;
object_class->dispose = gimp_layer_dispose;
object_class->finalize = gimp_layer_finalize;
gimp_object_class->name_changed = gimp_layer_name_changed;
gimp_object_class->get_memsize = gimp_layer_get_memsize;
viewable_class->default_stock_id = "gimp-layer";
viewable_class->invalidate_preview = gimp_layer_invalidate_preview;
viewable_class->get_description = gimp_layer_get_description;
item_class->removed = gimp_layer_removed;
item_class->unset_removed = gimp_layer_unset_removed;
item_class->is_attached = gimp_layer_is_attached;
item_class->get_tree = gimp_layer_get_tree;
item_class->duplicate = gimp_layer_duplicate;
item_class->convert = gimp_layer_convert;
item_class->rename = gimp_layer_rename;
item_class->translate = gimp_layer_translate;
item_class->scale = gimp_layer_scale;
item_class->resize = gimp_layer_resize;
item_class->flip = gimp_layer_flip;
item_class->rotate = gimp_layer_rotate;
item_class->transform = gimp_layer_transform;
item_class->to_selection = gimp_layer_to_selection;
item_class->get_node = gimp_layer_get_node;
item_class->default_name = _("Layer");
item_class->rename_desc = C_("undo-type", "Rename Layer");
item_class->translate_desc = C_("undo-type", "Move Layer");
item_class->scale_desc = C_("undo-type", "Scale Layer");
item_class->resize_desc = C_("undo-type", "Resize Layer");
item_class->flip_desc = C_("undo-type", "Flip Layer");
item_class->rotate_desc = C_("undo-type", "Rotate Layer");
item_class->transform_desc = C_("undo-type", "Transform Layer");
item_class->to_selection_desc = C_("undo-type", "Alpha to Selection");
item_class->reorder_desc = C_("undo-type", "Reorder Layer");
item_class->raise_desc = C_("undo-type", "Raise Layer");
item_class->raise_to_top_desc = C_("undo-type", "Raise Layer to Top");
item_class->lower_desc = C_("undo-type", "Lower Layer");
item_class->lower_to_bottom_desc = C_("undo-type", "Lower Layer to Bottom");
item_class->raise_failed = _("Layer cannot be raised higher.");
item_class->lower_failed = _("Layer cannot be lowered more.");
drawable_class->estimate_memsize = gimp_layer_estimate_memsize;
drawable_class->invalidate_boundary = gimp_layer_invalidate_boundary;
drawable_class->get_active_components = gimp_layer_get_active_components;
drawable_class->project_region = gimp_layer_project_region;
klass->opacity_changed = NULL;
klass->mode_changed = NULL;
klass->lock_alpha_changed = NULL;
klass->mask_changed = NULL;
klass->apply_mask_changed = NULL;
klass->edit_mask_changed = NULL;
klass->show_mask_changed = NULL;
g_object_class_install_property (object_class, PROP_OPACITY,
g_param_spec_double ("opacity", NULL, NULL,
GIMP_OPACITY_TRANSPARENT,
GIMP_OPACITY_OPAQUE,
GIMP_OPACITY_OPAQUE,
GIMP_PARAM_READABLE));
g_object_class_install_property (object_class, PROP_MODE,
g_param_spec_enum ("mode", NULL, NULL,
GIMP_TYPE_LAYER_MODE_EFFECTS,
GIMP_NORMAL_MODE,
GIMP_PARAM_READABLE));
g_object_class_install_property (object_class, PROP_LOCK_ALPHA,
g_param_spec_boolean ("lock-alpha",
NULL, NULL,
FALSE,
GIMP_PARAM_READABLE));
g_object_class_install_property (object_class, PROP_MASK,
g_param_spec_object ("mask",
NULL, NULL,
GIMP_TYPE_LAYER_MASK,
GIMP_PARAM_READABLE));
g_object_class_install_property (object_class, PROP_FLOATING_SELECTION,
g_param_spec_boolean ("floating-selection",
NULL, NULL,
FALSE,
GIMP_PARAM_READABLE));
}
static void
gimp_layer_init (GimpLayer *layer)
{
layer->opacity = GIMP_OPACITY_OPAQUE;
layer->mode = GIMP_NORMAL_MODE;
layer->lock_alpha = FALSE;
layer->mask = NULL;
layer->apply_mask = TRUE;
layer->edit_mask = TRUE;
layer->show_mask = FALSE;
/* floating selection */
layer->fs.drawable = NULL;
layer->fs.boundary_known = FALSE;
layer->fs.segs = NULL;
layer->fs.num_segs = 0;
}
static void
gimp_layer_pickable_iface_init (GimpPickableInterface *iface)
{
iface->get_opacity_at = gimp_layer_get_opacity_at;
}
static void
gimp_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_layer_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GimpLayer *layer = GIMP_LAYER (object);
switch (property_id)
{
case PROP_OPACITY:
g_value_set_double (value, gimp_layer_get_opacity (layer));
break;
case PROP_MODE:
g_value_set_enum (value, gimp_layer_get_mode (layer));
break;
case PROP_LOCK_ALPHA:
g_value_set_boolean (value, gimp_layer_get_lock_alpha (layer));
break;
case PROP_MASK:
g_value_set_object (value, gimp_layer_get_mask (layer));
break;
case PROP_FLOATING_SELECTION:
g_value_set_boolean (value, gimp_layer_is_floating_sel (layer));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_layer_dispose (GObject *object)
{
GimpLayer *layer = GIMP_LAYER (object);
if (layer->mask)
g_signal_handlers_disconnect_by_func (layer->mask,
gimp_layer_layer_mask_update,
layer);
if (gimp_layer_is_floating_sel (layer))
{
GimpDrawable *fs_drawable = gimp_layer_get_floating_sel_drawable (layer);
/* only detach if this is actually the drawable's fs because the
* layer might be on the undo stack and not attached to anyhing
*/
if (gimp_drawable_get_floating_sel (fs_drawable) == layer)
gimp_drawable_detach_floating_sel (fs_drawable);
}
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gimp_layer_finalize (GObject *object)
{
GimpLayer *layer = GIMP_LAYER (object);
if (layer->mask)
{
g_object_unref (layer->mask);
layer->mask = NULL;
}
if (layer->fs.segs)
{
g_free (layer->fs.segs);
layer->fs.segs = NULL;
layer->fs.num_segs = 0;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gimp_layer_name_changed (GimpObject *object)
{
GimpLayer *layer = GIMP_LAYER (object);
if (GIMP_OBJECT_CLASS (parent_class)->name_changed)
GIMP_OBJECT_CLASS (parent_class)->name_changed (object);
if (layer->mask)
{
gchar *mask_name = g_strdup_printf (_("%s mask"),
gimp_object_get_name (object));
gimp_object_take_name (GIMP_OBJECT (layer->mask), mask_name);
}
}
static gint64
gimp_layer_get_memsize (GimpObject *object,
gint64 *gui_size)
{
GimpLayer *layer = GIMP_LAYER (object);
gint64 memsize = 0;
memsize += gimp_object_get_memsize (GIMP_OBJECT (layer->mask), gui_size);
*gui_size += layer->fs.num_segs * sizeof (GimpBoundSeg);
return memsize + GIMP_OBJECT_CLASS (parent_class)->get_memsize (object,
gui_size);
}
static void
gimp_layer_invalidate_preview (GimpViewable *viewable)
{
GimpLayer *layer = GIMP_LAYER (viewable);
GIMP_VIEWABLE_CLASS (parent_class)->invalidate_preview (viewable);
if (gimp_layer_is_floating_sel (layer))
floating_sel_invalidate (layer);
}
static gchar *
gimp_layer_get_description (GimpViewable *viewable,
gchar **tooltip)
{
if (gimp_layer_is_floating_sel (GIMP_LAYER (viewable)))
{
return g_strdup_printf (_("Floating Selection\n(%s)"),
gimp_object_get_name (viewable));
}
return GIMP_VIEWABLE_CLASS (parent_class)->get_description (viewable,
tooltip);
}
static void
gimp_layer_removed (GimpItem *item)
{
GimpLayer *layer = GIMP_LAYER (item);
if (layer->mask)
gimp_item_removed (GIMP_ITEM (layer->mask));
if (GIMP_ITEM_CLASS (parent_class)->removed)
GIMP_ITEM_CLASS (parent_class)->removed (item);
}
static void
gimp_layer_unset_removed (GimpItem *item)
{
GimpLayer *layer = GIMP_LAYER (item);
if (layer->mask)
gimp_item_unset_removed (GIMP_ITEM (layer->mask));
if (GIMP_ITEM_CLASS (parent_class)->unset_removed)
GIMP_ITEM_CLASS (parent_class)->unset_removed (item);
}
static gboolean
gimp_layer_is_attached (const GimpItem *item)
{
GimpImage *image = gimp_item_get_image (item);
return (GIMP_IS_IMAGE (image) &&
gimp_container_have (gimp_image_get_layers (image),
GIMP_OBJECT (item)));
}
static GimpItemTree *
gimp_layer_get_tree (GimpItem *item)
{
if (gimp_item_is_attached (item))
{
GimpImage *image = gimp_item_get_image (item);
return gimp_image_get_layer_tree (image);
}
return NULL;
}
static GimpItem *
gimp_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_LAYER (new_item))
{
GimpLayer *layer = GIMP_LAYER (item);
GimpLayer *new_layer = GIMP_LAYER (new_item);
gimp_layer_set_mode (new_layer, gimp_layer_get_mode (layer), FALSE);
gimp_layer_set_opacity (new_layer, gimp_layer_get_opacity (layer), FALSE);
if (gimp_layer_can_lock_alpha (new_layer))
gimp_layer_set_lock_alpha (new_layer,
gimp_layer_get_lock_alpha (layer), FALSE);
/* duplicate the layer mask if necessary */
if (layer->mask)
{
GimpItem *mask;
mask = gimp_item_duplicate (GIMP_ITEM (layer->mask),
G_TYPE_FROM_INSTANCE (layer->mask));
gimp_layer_add_mask (new_layer, GIMP_LAYER_MASK (mask), FALSE, NULL);
new_layer->apply_mask = layer->apply_mask;
new_layer->edit_mask = layer->edit_mask;
new_layer->show_mask = layer->show_mask;
}
}
return new_item;
}
static void
gimp_layer_convert (GimpItem *item,
GimpImage *dest_image)
{
GimpLayer *layer = GIMP_LAYER (item);
GimpDrawable *drawable = GIMP_DRAWABLE (item);
GimpImageBaseType old_base_type;
GimpImageBaseType new_base_type;
old_base_type = gimp_drawable_get_base_type (drawable);
new_base_type = gimp_image_base_type (dest_image);
if (old_base_type != new_base_type)
gimp_drawable_convert_type (drawable, dest_image, new_base_type, FALSE);
if (layer->mask)
gimp_item_set_image (GIMP_ITEM (layer->mask), dest_image);
GIMP_ITEM_CLASS (parent_class)->convert (item, dest_image);
}
static gboolean
gimp_layer_rename (GimpItem *item,
const gchar *new_name,
const gchar *undo_desc,
GError **error)
{
GimpLayer *layer = GIMP_LAYER (item);
GimpImage *image = gimp_item_get_image (item);
gboolean attached;
gboolean floating_sel;
attached = gimp_item_is_attached (item);
floating_sel = gimp_layer_is_floating_sel (layer);
if (floating_sel)
{
if (GIMP_IS_CHANNEL (gimp_layer_get_floating_sel_drawable (layer)))
{
g_set_error_literal (error, GIMP_ERROR, GIMP_FAILED,
_("Cannot create a new layer from the floating "
"selection because it belongs to a layer mask "
"or channel."));
return FALSE;
}
if (attached)
{
gimp_image_undo_group_start (image,
GIMP_UNDO_GROUP_ITEM_PROPERTIES,
undo_desc);
floating_sel_to_layer (layer, NULL);
}
}
GIMP_ITEM_CLASS (parent_class)->rename (item, new_name, undo_desc, error);
if (attached && floating_sel)
gimp_image_undo_group_end (image);
return TRUE;
}
static void
gimp_layer_translate (GimpItem *item,
gint offset_x,
gint offset_y,
gboolean push_undo)
{
GimpLayer *layer = GIMP_LAYER (item);
if (push_undo)
gimp_image_undo_push_item_displace (gimp_item_get_image (item), NULL, item);
/* update the old region */
gimp_drawable_update (GIMP_DRAWABLE (layer),
0, 0,
gimp_item_get_width (item),
gimp_item_get_height (item));
/* invalidate the selection boundary because of a layer modification */
gimp_drawable_invalidate_boundary (GIMP_DRAWABLE (layer));
GIMP_ITEM_CLASS (parent_class)->translate (item, offset_x, offset_y,
push_undo);
/* update the new region */
gimp_drawable_update (GIMP_DRAWABLE (layer),
0, 0,
gimp_item_get_width (item),
gimp_item_get_height (item));
if (layer->mask)
{
gint off_x, off_y;
gimp_item_get_offset (item, &off_x, &off_y);
gimp_item_set_offset (GIMP_ITEM (layer->mask), off_x, off_y);
gimp_viewable_invalidate_preview (GIMP_VIEWABLE (layer->mask));
}
}
static void
gimp_layer_scale (GimpItem *item,
gint new_width,
gint new_height,
gint new_offset_x,
gint new_offset_y,
GimpInterpolationType interpolation_type,
GimpProgress *progress)
{
GimpLayer *layer = GIMP_LAYER (item);
GIMP_ITEM_CLASS (parent_class)->scale (item, new_width, new_height,
new_offset_x, new_offset_y,
interpolation_type, progress);
if (layer->mask)
gimp_item_scale (GIMP_ITEM (layer->mask),
new_width, new_height,
new_offset_x, new_offset_y,
interpolation_type, progress);
}
static void
gimp_layer_resize (GimpItem *item,
GimpContext *context,
gint new_width,
gint new_height,
gint offset_x,
gint offset_y)
{
GimpLayer *layer = GIMP_LAYER (item);
GIMP_ITEM_CLASS (parent_class)->resize (item, context, new_width, new_height,
offset_x, offset_y);
if (layer->mask)
gimp_item_resize (GIMP_ITEM (layer->mask), context,
new_width, new_height, offset_x, offset_y);
}
static void
gimp_layer_flip (GimpItem *item,
GimpContext *context,
GimpOrientationType flip_type,
gdouble axis,
gboolean clip_result)
{
GimpLayer *layer = GIMP_LAYER (item);
GIMP_ITEM_CLASS (parent_class)->flip (item, context, flip_type, axis,
clip_result);
if (layer->mask)
gimp_item_flip (GIMP_ITEM (layer->mask), context,
flip_type, axis, clip_result);
}
static void
gimp_layer_rotate (GimpItem *item,
GimpContext *context,
GimpRotationType rotate_type,
gdouble center_x,
gdouble center_y,
gboolean clip_result)
{
GimpLayer *layer = GIMP_LAYER (item);
GIMP_ITEM_CLASS (parent_class)->rotate (item, context,
rotate_type, center_x, center_y,
clip_result);
if (layer->mask)
gimp_item_rotate (GIMP_ITEM (layer->mask), context,
rotate_type, center_x, center_y, clip_result);
}
static void
gimp_layer_transform (GimpItem *item,
GimpContext *context,
const GimpMatrix3 *matrix,
GimpTransformDirection direction,
GimpInterpolationType interpolation_type,
gint recursion_level,
GimpTransformResize clip_result,
GimpProgress *progress)
{
GimpLayer *layer = GIMP_LAYER (item);
/* FIXME: make interpolated transformations work on layers without alpha */
if (interpolation_type != GIMP_INTERPOLATION_NONE &&
! gimp_drawable_has_alpha (GIMP_DRAWABLE (item)))
gimp_layer_add_alpha (layer);
GIMP_ITEM_CLASS (parent_class)->transform (item, context, matrix, direction,
interpolation_type,
recursion_level,
clip_result,
progress);
if (layer->mask)
gimp_item_transform (GIMP_ITEM (layer->mask), context,
matrix, direction,
interpolation_type, recursion_level,
clip_result, progress);
}
static void
gimp_layer_to_selection (GimpItem *item,
GimpChannelOps op,
gboolean antialias,
gboolean feather,
gdouble feather_radius_x,
gdouble feather_radius_y)
{
GimpLayer *layer = GIMP_LAYER (item);
GimpImage *image = gimp_item_get_image (item);
gimp_channel_select_alpha (gimp_image_get_mask (image),
GIMP_DRAWABLE (layer),
op,
feather, feather_radius_x, feather_radius_y);
}
static GeglNode *
gimp_layer_get_node (GimpItem *item)
{
GimpDrawable *drawable = GIMP_DRAWABLE (item);
GimpLayer *layer = GIMP_LAYER (item);
GeglNode *node;
GeglNode *offset_node;
GeglNode *source;
GeglNode *mode_node;
gboolean source_node_hijacked = FALSE;
node = GIMP_ITEM_CLASS (parent_class)->get_node (item);
source = gimp_drawable_get_source_node (drawable);
/* if the source node already has a parent, we are a floating
* selection and the source node has been hijacked by the fs'
* drawable
*/
if (gegl_node_get_parent (source))
source_node_hijacked = TRUE;
if (! source_node_hijacked)
gegl_node_add_child (node, source);
g_warn_if_fail (layer->opacity_node == NULL);
layer->opacity_node = gegl_node_new_child (node,
"operation", "gegl:opacity",
"value", layer->opacity,
NULL);
if (! source_node_hijacked &&
(! layer->mask || ! gimp_layer_get_show_mask (layer)))
{
gegl_node_connect_to (source, "output",
layer->opacity_node, "input");
}
if (layer->mask)
{
GeglNode *mask;
mask = gimp_drawable_get_source_node (GIMP_DRAWABLE (layer->mask));
if (gimp_layer_get_show_mask (layer))
{
gegl_node_connect_to (mask, "output",
layer->opacity_node, "input");
}
else if (gimp_layer_get_apply_mask (layer))
{
gegl_node_connect_to (mask, "output",
layer->opacity_node, "aux");
}
}
offset_node = gimp_item_get_offset_node (GIMP_ITEM (layer));
gegl_node_connect_to (layer->opacity_node, "output",
offset_node, "input");
mode_node = gimp_drawable_get_mode_node (drawable);
gimp_gegl_node_set_layer_mode (mode_node,
layer->mode,
TRUE);
gegl_node_connect_to (offset_node, "output",
mode_node, "aux");
return node;
}
static gint64
gimp_layer_estimate_memsize (const GimpDrawable *drawable,
gint width,
gint height)
{
GimpLayer *layer = GIMP_LAYER (drawable);
gint64 memsize = 0;
if (layer->mask)
memsize += gimp_drawable_estimate_memsize (GIMP_DRAWABLE (layer->mask),
width, height);
return memsize + GIMP_DRAWABLE_CLASS (parent_class)->estimate_memsize (drawable,
width,
height);
}
static void
gimp_layer_invalidate_boundary (GimpDrawable *drawable)
{
GimpLayer *layer = GIMP_LAYER (drawable);
GimpImage *image;
GimpChannel *mask;
if (! (image = gimp_item_get_image (GIMP_ITEM (layer))))
return;
/* Turn the current selection off */
gimp_image_selection_invalidate (image);
/* get the selection mask channel */
mask = gimp_image_get_mask (image);
/* Only bother with the bounds if there is a selection */
if (! gimp_channel_is_empty (mask))
{
mask->bounds_known = FALSE;
mask->boundary_known = FALSE;
}
if (gimp_layer_is_floating_sel (layer))
floating_sel_invalidate (layer);
}
static void
gimp_layer_get_active_components (const GimpDrawable *drawable,
gboolean *active)
{
GimpLayer *layer = GIMP_LAYER (drawable);
GimpImage *image = gimp_item_get_image (GIMP_ITEM (drawable));
/* first copy the image active channels */
gimp_image_get_active_array (image, active);
if (gimp_drawable_has_alpha (drawable) && layer->lock_alpha)
active[gimp_drawable_bytes (drawable) - 1] = FALSE;
}
static gint
gimp_layer_get_opacity_at (GimpPickable *pickable,
gint x,
gint y)
{
GimpLayer *layer = GIMP_LAYER (pickable);
guchar value = 0;
if (x >= 0 && x < gimp_item_get_width (GIMP_ITEM (layer)) &&
y >= 0 && y < gimp_item_get_height (GIMP_ITEM (layer)) &&
gimp_item_get_visible (GIMP_ITEM (layer)))
{
/* If the point is inside, and the layer has no
* alpha channel, success!
*/
if (! gimp_drawable_has_alpha (GIMP_DRAWABLE (layer)))
return OPAQUE_OPACITY;
/* Otherwise, determine if the alpha value at
* the given point is non-zero
*/
gegl_buffer_sample (gimp_drawable_get_buffer (GIMP_DRAWABLE (layer)),
x, y, NULL, &value, babl_format ("A u8"),
GEGL_SAMPLER_NEAREST, GEGL_ABYSS_NONE);
if (layer->mask)
{
gint mask_value;
mask_value = gimp_pickable_get_opacity_at (GIMP_PICKABLE (layer->mask),
x, y);
value = value * mask_value / 255;
}
}
return value;
}
static void
gimp_layer_layer_mask_update (GimpDrawable *drawable,
gint x,
gint y,
gint width,
gint height,
GimpLayer *layer)
{
if (gimp_layer_get_apply_mask (layer) ||
gimp_layer_get_show_mask (layer))
{
gimp_drawable_update (GIMP_DRAWABLE (layer),
x, y, width, height);
}
}
/* public functions */
GimpLayer *
gimp_layer_new (GimpImage *image,
gint width,
gint height,
const Babl *format,
const gchar *name,
gdouble opacity,
GimpLayerModeEffects mode)
{
GimpLayer *layer;
g_return_val_if_fail (GIMP_IS_IMAGE (image), NULL);
g_return_val_if_fail (width > 0, NULL);
g_return_val_if_fail (height > 0, NULL);
g_return_val_if_fail (format != NULL, NULL);
layer = GIMP_LAYER (gimp_drawable_new (GIMP_TYPE_LAYER,
image, name,
0, 0, width, height,
format));
opacity = CLAMP (opacity, GIMP_OPACITY_TRANSPARENT, GIMP_OPACITY_OPAQUE);
layer->opacity = opacity;
layer->mode = mode;
return layer;
}
/**
* gimp_layer_new_from_buffer:
* @buffer: The buffer to make the new layer from.
* @dest_image: The image the new layer will be added to.
* @type: The #GimpImageType of the new layer.
* @name: The new layer's name.
* @opacity: The new layer's opacity.
* @mode: The new layer's mode.
*
* Copies %buffer to a layer taking into consideration the
* possibility of transforming the contents to meet the requirements
* of the target image type
*
* Return value: The new layer.
**/
GimpLayer *
gimp_layer_new_from_buffer (GeglBuffer *buffer,
GimpImage *dest_image,
const Babl *format,
const gchar *name,
gdouble opacity,
GimpLayerModeEffects mode)
{
GimpLayer *layer;
GeglBuffer *dest;
g_return_val_if_fail (GEGL_IS_BUFFER (buffer), NULL);
g_return_val_if_fail (GIMP_IS_IMAGE (dest_image), NULL);
g_return_val_if_fail (format != NULL, NULL);
/* do *not* use the buffer's format because this function gets
* buffers of any format passed, and converts them
*/
layer = gimp_layer_new (dest_image,
gegl_buffer_get_width (buffer),
gegl_buffer_get_height (buffer),
format,
name, opacity, mode);
dest = gimp_drawable_get_buffer (GIMP_DRAWABLE (layer));
gegl_buffer_copy (buffer, NULL, dest, NULL);
return layer;
}
/**
* gimp_layer_new_from_pixbuf:
* @pixbuf: The pixbuf to make the new layer from.
* @dest_image: The image the new layer will be added to.
* @type: The #GimpImageType of the new layer.
* @name: The new layer's name.
* @opacity: The new layer's opacity.
* @mode: The new layer's mode.
*
* Copies %pixbuf to a layer taking into consideration the
* possibility of transforming the contents to meet the requirements
* of the target image type
*
* Return value: The new layer.
**/
GimpLayer *
gimp_layer_new_from_pixbuf (GdkPixbuf *pixbuf,
GimpImage *dest_image,
const Babl *format,
const gchar *name,
gdouble opacity,
GimpLayerModeEffects mode)
{
GeglBuffer *buffer;
GimpLayer *layer;
g_return_val_if_fail (GDK_IS_PIXBUF (pixbuf), NULL);
g_return_val_if_fail (GIMP_IS_IMAGE (dest_image), NULL);
g_return_val_if_fail (format != NULL, NULL);
buffer = gimp_pixbuf_create_buffer (pixbuf);
layer = gimp_layer_new_from_buffer (buffer, dest_image, format,
name, opacity, mode);
g_object_unref (buffer);
return layer;
}
GimpLayer *
gimp_layer_get_parent (GimpLayer *layer)
{
g_return_val_if_fail (GIMP_IS_LAYER (layer), NULL);
return GIMP_LAYER (gimp_viewable_get_parent (GIMP_VIEWABLE (layer)));
}
GimpLayerMask *
gimp_layer_get_mask (const GimpLayer *layer)
{
g_return_val_if_fail (GIMP_IS_LAYER (layer), NULL);
return layer->mask;
}
GimpLayerMask *
gimp_layer_add_mask (GimpLayer *layer,
GimpLayerMask *mask,
gboolean push_undo,
GError **error)
{
GimpImage *image;
g_return_val_if_fail (GIMP_IS_LAYER (layer), NULL);
g_return_val_if_fail (GIMP_IS_LAYER_MASK (mask), NULL);
g_return_val_if_fail (gimp_item_get_image (GIMP_ITEM (layer)) ==
gimp_item_get_image (GIMP_ITEM (mask)), NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
if (! gimp_item_is_attached (GIMP_ITEM (layer)))
push_undo = FALSE;
image = gimp_item_get_image (GIMP_ITEM (layer));
if (layer->mask)
{
g_set_error_literal (error, GIMP_ERROR, GIMP_FAILED,
_("Unable to add a layer mask since "
"the layer already has one."));
return NULL;
}
if ((gimp_item_get_width (GIMP_ITEM (layer)) !=
gimp_item_get_width (GIMP_ITEM (mask))) ||
(gimp_item_get_height (GIMP_ITEM (layer)) !=
gimp_item_get_height (GIMP_ITEM (mask))))
{
g_set_error_literal (error, GIMP_ERROR, GIMP_FAILED,
_("Cannot add layer mask of different "
"dimensions than specified layer."));
return NULL;
}
if (push_undo)
gimp_image_undo_push_layer_mask_add (image, C_("undo-type", "Add Layer Mask"),
layer, mask);
layer->mask = g_object_ref_sink (mask);
layer->apply_mask = TRUE;
layer->edit_mask = TRUE;
layer->show_mask = FALSE;
gimp_layer_mask_set_layer (mask, layer);
if (layer->opacity_node)
{
GeglNode *mask;
mask = gimp_drawable_get_source_node (GIMP_DRAWABLE (layer->mask));
if (layer->show_mask)
{
gegl_node_connect_to (mask, "output",
layer->opacity_node, "input");
}
else
{
gegl_node_connect_to (mask, "output",
layer->opacity_node, "aux");
}
}
if (gimp_layer_get_apply_mask (layer) ||
gimp_layer_get_show_mask (layer))
{
gimp_drawable_update (GIMP_DRAWABLE (layer),
0, 0,
gimp_item_get_width (GIMP_ITEM (layer)),
gimp_item_get_height (GIMP_ITEM (layer)));
}
g_signal_connect (mask, "update",
G_CALLBACK (gimp_layer_layer_mask_update),
layer);
g_signal_emit (layer, layer_signals[MASK_CHANGED], 0);
g_object_notify (G_OBJECT (layer), "mask");
/* if the mask came from the undo stack, reset its "removed" state */
if (gimp_item_is_removed (GIMP_ITEM (mask)))
gimp_item_unset_removed (GIMP_ITEM (mask));
return layer->mask;
}
GimpLayerMask *
gimp_layer_create_mask (const GimpLayer *layer,
GimpAddMaskType add_mask_type,
GimpChannel *channel)
{
GimpDrawable *drawable;
GimpItem *item;
GimpLayerMask *mask;
GimpImage *image;
gchar *mask_name;
GimpRGB black = { 0.0, 0.0, 0.0, GIMP_OPACITY_OPAQUE };
g_return_val_if_fail (GIMP_IS_LAYER (layer), NULL);
g_return_val_if_fail (add_mask_type != GIMP_ADD_CHANNEL_MASK ||
GIMP_IS_CHANNEL (channel), NULL);
drawable = GIMP_DRAWABLE (layer);
item = GIMP_ITEM (layer);
image = gimp_item_get_image (item);
mask_name = g_strdup_printf (_("%s mask"),
gimp_object_get_name (layer));
mask = gimp_layer_mask_new (image,
gimp_item_get_width (item),
gimp_item_get_height (item),
mask_name, &black);
g_free (mask_name);
switch (add_mask_type)
{
case GIMP_ADD_WHITE_MASK:
gimp_channel_all (GIMP_CHANNEL (mask), FALSE);
return mask;
case GIMP_ADD_BLACK_MASK:
gimp_channel_clear (GIMP_CHANNEL (mask), NULL, FALSE);
return mask;
default:
break;
}
switch (add_mask_type)
{
case GIMP_ADD_WHITE_MASK:
case GIMP_ADD_BLACK_MASK:
break;
case GIMP_ADD_ALPHA_MASK:
case GIMP_ADD_ALPHA_TRANSFER_MASK:
if (gimp_drawable_has_alpha (drawable))
{
GeglBuffer *dest_buffer;
dest_buffer = gimp_drawable_get_buffer (GIMP_DRAWABLE (mask));
gegl_buffer_set_format (dest_buffer, babl_format ("A u8"));
gegl_buffer_copy (gimp_drawable_get_buffer (drawable), NULL,
dest_buffer, NULL);
gegl_buffer_set_format (dest_buffer, NULL);
if (add_mask_type == GIMP_ADD_ALPHA_TRANSFER_MASK)
{
GeglNode *set_alpha;
gimp_drawable_push_undo (drawable,
C_("undo-type", "Transfer Alpha to Mask"),
NULL,
0, 0,
gimp_item_get_width (item),
gimp_item_get_height (item));
set_alpha = gegl_node_new_child (NULL,
"operation", "gimp:set-alpha",
"value", 1.0,
NULL);
gimp_apply_operation (gimp_drawable_get_buffer (drawable),
NULL, NULL,
set_alpha,
gimp_drawable_get_buffer (drawable),
NULL);
g_object_unref (set_alpha);
}
}
break;
case GIMP_ADD_SELECTION_MASK:
case GIMP_ADD_CHANNEL_MASK:
{
gboolean channel_empty;
gint offset_x, offset_y;
gint copy_x, copy_y;
gint copy_width, copy_height;
if (add_mask_type == GIMP_ADD_SELECTION_MASK)
channel = GIMP_CHANNEL (gimp_image_get_mask (image));
channel_empty = gimp_channel_is_empty (channel);
gimp_item_get_offset (item, &offset_x, &offset_y);
gimp_rectangle_intersect (0, 0,
gimp_image_get_width (image),
gimp_image_get_height (image),
offset_x, offset_y,
gimp_item_get_width (item),
gimp_item_get_height (item),
&copy_x, &copy_y,
&copy_width, &copy_height);
if (copy_width < gimp_item_get_width (item) ||
copy_height < gimp_item_get_height (item) ||
channel_empty)
gimp_channel_clear (GIMP_CHANNEL (mask), NULL, FALSE);
if ((copy_width || copy_height) && ! channel_empty)
{
GeglBuffer *src;
GeglBuffer *dest;
src = gimp_drawable_get_buffer (GIMP_DRAWABLE (channel));
dest = gimp_drawable_get_buffer (GIMP_DRAWABLE (mask));
gegl_buffer_copy (src,
GEGL_RECTANGLE (copy_x, copy_y,
copy_width, copy_height),
dest,
GEGL_RECTANGLE (copy_x - offset_x, copy_y - offset_y,
0, 0));
GIMP_CHANNEL (mask)->bounds_known = FALSE;
}
}
break;
case GIMP_ADD_COPY_MASK:
{
GeglBuffer *src_buffer;
GeglBuffer *dest_buffer;
if (! gimp_drawable_is_gray (drawable))
{
const Babl *copy_format =
gimp_image_get_format (image,
gimp_drawable_has_alpha (drawable) ?
GIMP_GRAYA_IMAGE : GIMP_GRAY_IMAGE);
src_buffer =
gimp_gegl_buffer_new (GEGL_RECTANGLE (0, 0,
gimp_item_get_width (item),
gimp_item_get_height (item)),
copy_format);
gegl_buffer_copy (gimp_drawable_get_buffer (drawable), NULL,
src_buffer, NULL);
}
else
{
src_buffer = gimp_drawable_get_buffer (drawable);
g_object_ref (src_buffer);
}
dest_buffer = gimp_drawable_get_buffer (GIMP_DRAWABLE (mask));
if (gimp_drawable_has_alpha (drawable))
{
GeglNode *flatten;
GimpRGB background;
gimp_rgba_set (&background, 0.0, 0.0, 0.0, 0.0);
flatten = gimp_gegl_create_flatten_node (&background);
gimp_apply_operation (src_buffer, NULL, NULL,
flatten,
dest_buffer, NULL);
g_object_unref (flatten);
}
else
{
gegl_buffer_copy (src_buffer, NULL, dest_buffer, NULL);
}
g_object_unref (src_buffer);
}
GIMP_CHANNEL (mask)->bounds_known = FALSE;
break;
}
return mask;
}
void
gimp_layer_apply_mask (GimpLayer *layer,
GimpMaskApplyMode mode,
gboolean push_undo)
{
GimpItem *item;
GimpImage *image;
GimpLayerMask *mask;
gboolean view_changed = FALSE;
g_return_if_fail (GIMP_IS_LAYER (layer));
mask = gimp_layer_get_mask (layer);
if (! mask)
return;
/* APPLY can only be done to layers with an alpha channel */
if (! gimp_drawable_has_alpha (GIMP_DRAWABLE (layer)))
g_return_if_fail (mode == GIMP_MASK_DISCARD || push_undo == TRUE);
item = GIMP_ITEM (layer);
image = gimp_item_get_image (item);
if (! image)
return;
if (push_undo)
{
gimp_image_undo_group_start (image, GIMP_UNDO_GROUP_LAYER_APPLY_MASK,
(mode == GIMP_MASK_APPLY) ?
C_("undo-type", "Apply Layer Mask") :
C_("undo-type", "Delete Layer Mask"));
gimp_image_undo_push_layer_mask_show (image, NULL, layer);
gimp_image_undo_push_layer_mask_apply (image, NULL, layer);
gimp_image_undo_push_layer_mask_remove (image, NULL, layer, mask);
if (mode == GIMP_MASK_APPLY &&
! gimp_drawable_has_alpha (GIMP_DRAWABLE (layer)))
{
gimp_layer_add_alpha (layer);
}
}
/* check if applying the mask changes the projection */
if (gimp_layer_get_show_mask (layer) ||
(mode == GIMP_MASK_APPLY && ! gimp_layer_get_apply_mask (layer)) ||
(mode == GIMP_MASK_DISCARD && gimp_layer_get_apply_mask (layer)))
{
view_changed = TRUE;
}
if (mode == GIMP_MASK_APPLY)
{
GeglBuffer *mask_buffer;
GeglBuffer *dest_buffer;
GeglNode *apply_opacity;
if (push_undo)
gimp_drawable_push_undo (GIMP_DRAWABLE (layer), NULL,
NULL,
0, 0,
gimp_item_get_width (item),
gimp_item_get_height (item));
/* Combine the current layer's alpha channel and the mask */
mask_buffer = gimp_drawable_get_buffer (GIMP_DRAWABLE (mask));
dest_buffer = gimp_drawable_get_buffer (GIMP_DRAWABLE (layer));
apply_opacity = gimp_gegl_create_apply_opacity_node (mask_buffer, 0, 0,
1.0);
gimp_drawable_apply_operation_to_buffer (GIMP_DRAWABLE (layer), NULL, NULL,
apply_opacity, dest_buffer);
g_object_unref (apply_opacity);
}
g_signal_handlers_disconnect_by_func (mask,
gimp_layer_layer_mask_update,
layer);
gimp_item_removed (GIMP_ITEM (mask));
g_object_unref (mask);
layer->mask = NULL;
if (push_undo)
gimp_image_undo_group_end (image);
if (layer->opacity_node)
{
if (layer->show_mask)
{
GeglNode *source;
source = gimp_drawable_get_source_node (GIMP_DRAWABLE (layer));
gegl_node_connect_to (source, "output",
layer->opacity_node, "input");
}
else
{
gegl_node_disconnect (layer->opacity_node, "aux");
}
}
/* If applying actually changed the view */
if (view_changed)
{
gimp_drawable_update (GIMP_DRAWABLE (layer),
0, 0,
gimp_item_get_width (item),
gimp_item_get_height (item));
}
else
{
gimp_viewable_invalidate_preview (GIMP_VIEWABLE (layer));
}
g_signal_emit (layer, layer_signals[MASK_CHANGED], 0);
g_object_notify (G_OBJECT (layer), "mask");
}
void
gimp_layer_set_apply_mask (GimpLayer *layer,
gboolean apply,
gboolean push_undo)
{
g_return_if_fail (GIMP_IS_LAYER (layer));
g_return_if_fail (layer->mask != NULL);
if (layer->apply_mask != apply)
{
GimpImage *image = gimp_item_get_image (GIMP_ITEM (layer));
if (push_undo)
gimp_image_undo_push_layer_mask_apply (image,
apply ?
C_("undo-type", "Enable Layer Mask") :
C_("undo-type", "Disable Layer Mask"),
layer);
layer->apply_mask = apply ? TRUE : FALSE;
if (layer->opacity_node && ! gimp_layer_get_show_mask (layer))
{
GeglNode *mask;
mask = gimp_drawable_get_source_node (GIMP_DRAWABLE (layer->mask));
if (layer->apply_mask)
{
gegl_node_connect_to (mask, "output",
layer->opacity_node, "aux");
}
else
{
gegl_node_disconnect (layer->opacity_node, "aux");
}
}
gimp_drawable_update (GIMP_DRAWABLE (layer),
0, 0,
gimp_item_get_width (GIMP_ITEM (layer)),
gimp_item_get_height (GIMP_ITEM (layer)));
g_signal_emit (layer, layer_signals[APPLY_MASK_CHANGED], 0);
}
}
gboolean
gimp_layer_get_apply_mask (const GimpLayer *layer)
{
g_return_val_if_fail (GIMP_IS_LAYER (layer), FALSE);
g_return_val_if_fail (layer->mask, FALSE);
return layer->apply_mask;
}
void
gimp_layer_set_edit_mask (GimpLayer *layer,
gboolean edit)
{
g_return_if_fail (GIMP_IS_LAYER (layer));
g_return_if_fail (layer->mask != NULL);
if (layer->edit_mask != edit)
{
layer->edit_mask = edit ? TRUE : FALSE;
g_signal_emit (layer, layer_signals[EDIT_MASK_CHANGED], 0);
}
}
gboolean
gimp_layer_get_edit_mask (const GimpLayer *layer)
{
g_return_val_if_fail (GIMP_IS_LAYER (layer), FALSE);
g_return_val_if_fail (layer->mask, FALSE);
return layer->edit_mask;
}
void
gimp_layer_set_show_mask (GimpLayer *layer,
gboolean show,
gboolean push_undo)
{
g_return_if_fail (GIMP_IS_LAYER (layer));
g_return_if_fail (layer->mask != NULL);
if (layer->show_mask != show)
{
GimpImage *image = gimp_item_get_image (GIMP_ITEM (layer));
if (push_undo)
gimp_image_undo_push_layer_mask_show (image,
C_("undo-type", "Show Layer Mask"),
layer);
layer->show_mask = show ? TRUE : FALSE;
if (layer->opacity_node)
{
GeglNode *mask;
mask = gimp_drawable_get_source_node (GIMP_DRAWABLE (layer->mask));
if (layer->show_mask)
{
gegl_node_disconnect (layer->opacity_node, "aux");
gegl_node_connect_to (mask, "output",
layer->opacity_node, "input");
}
else
{
GeglNode *source;
source = gimp_drawable_get_source_node (GIMP_DRAWABLE (layer));
gegl_node_connect_to (source, "output",
layer->opacity_node, "input");
if (gimp_layer_get_apply_mask (layer))
{
gegl_node_connect_to (mask, "output",
layer->opacity_node, "aux");
}
}
}
gimp_drawable_update (GIMP_DRAWABLE (layer),
0, 0,
gimp_item_get_width (GIMP_ITEM (layer)),
gimp_item_get_height (GIMP_ITEM (layer)));
g_signal_emit (layer, layer_signals[SHOW_MASK_CHANGED], 0);
}
}
gboolean
gimp_layer_get_show_mask (const GimpLayer *layer)
{
g_return_val_if_fail (GIMP_IS_LAYER (layer), FALSE);
g_return_val_if_fail (layer->mask, FALSE);
return layer->show_mask;
}
void
gimp_layer_add_alpha (GimpLayer *layer)
{
GimpItem *item;
GimpDrawable *drawable;
GeglBuffer *new_buffer;
g_return_if_fail (GIMP_IS_LAYER (layer));
if (gimp_drawable_has_alpha (GIMP_DRAWABLE (layer)))
return;
item = GIMP_ITEM (layer);
drawable = GIMP_DRAWABLE (layer);
new_buffer =
gimp_gegl_buffer_new (GEGL_RECTANGLE (0, 0,
gimp_item_get_width (item),
gimp_item_get_height (item)),
gimp_drawable_get_format_with_alpha (drawable));
gegl_buffer_copy (gimp_drawable_get_buffer (drawable), NULL,
new_buffer, NULL);
gimp_drawable_set_buffer (GIMP_DRAWABLE (layer),
gimp_item_is_attached (GIMP_ITEM (layer)),
C_("undo-type", "Add Alpha Channel"),
new_buffer);
g_object_unref (new_buffer);
}
void
gimp_layer_flatten (GimpLayer *layer,
GimpContext *context)
{
GeglNode *flatten;
GeglBuffer *new_buffer;
GimpRGB background;
g_return_if_fail (GIMP_IS_LAYER (layer));
g_return_if_fail (GIMP_IS_CONTEXT (context));
if (! gimp_drawable_has_alpha (GIMP_DRAWABLE (layer)))
return;
new_buffer =
gimp_gegl_buffer_new (GEGL_RECTANGLE (0, 0,
gimp_item_get_width (GIMP_ITEM (layer)),
gimp_item_get_height (GIMP_ITEM (layer))),
gimp_drawable_get_format_without_alpha (GIMP_DRAWABLE (layer)));
gimp_context_get_background (context, &background);
flatten = gimp_gegl_create_flatten_node (&background);
gimp_drawable_apply_operation_to_buffer (GIMP_DRAWABLE (layer), NULL, NULL,
flatten, new_buffer);
g_object_unref (flatten);
gimp_drawable_set_buffer (GIMP_DRAWABLE (layer),
gimp_item_is_attached (GIMP_ITEM (layer)),
C_("undo-type", "Remove Alpha Channel"),
new_buffer);
g_object_unref (new_buffer);
}
void
gimp_layer_resize_to_image (GimpLayer *layer,
GimpContext *context)
{
GimpImage *image;
gint offset_x;
gint offset_y;
g_return_if_fail (GIMP_IS_LAYER (layer));
g_return_if_fail (gimp_item_is_attached (GIMP_ITEM (layer)));
g_return_if_fail (GIMP_IS_CONTEXT (context));
image = gimp_item_get_image (GIMP_ITEM (layer));
gimp_image_undo_group_start (image, GIMP_UNDO_GROUP_ITEM_RESIZE,
C_("undo-type", "Layer to Image Size"));
gimp_item_get_offset (GIMP_ITEM (layer), &offset_x, &offset_y);
gimp_item_resize (GIMP_ITEM (layer), context,
gimp_image_get_width (image),
gimp_image_get_height (image),
offset_x, offset_y);
gimp_image_undo_group_end (image);
}
/**********************/
/* access functions */
/**********************/
GimpDrawable *
gimp_layer_get_floating_sel_drawable (const GimpLayer *layer)
{
g_return_val_if_fail (GIMP_IS_LAYER (layer), NULL);
return layer->fs.drawable;
}
void
gimp_layer_set_floating_sel_drawable (GimpLayer *layer,
GimpDrawable *drawable)
{
g_return_if_fail (GIMP_IS_LAYER (layer));
g_return_if_fail (drawable == NULL || GIMP_IS_DRAWABLE (drawable));
if (layer->fs.drawable != drawable)
{
if (layer->fs.segs)
{
g_free (layer->fs.segs);
layer->fs.segs = NULL;
layer->fs.num_segs = 0;
}
layer->fs.drawable = drawable;
g_object_notify (G_OBJECT (layer), "floating-selection");
}
}
gboolean
gimp_layer_is_floating_sel (const GimpLayer *layer)
{
g_return_val_if_fail (GIMP_IS_LAYER (layer), FALSE);
return (gimp_layer_get_floating_sel_drawable (layer) != NULL);
}
void
gimp_layer_set_opacity (GimpLayer *layer,
gdouble opacity,
gboolean push_undo)
{
g_return_if_fail (GIMP_IS_LAYER (layer));
opacity = CLAMP (opacity, GIMP_OPACITY_TRANSPARENT, GIMP_OPACITY_OPAQUE);
if (layer->opacity != opacity)
{
if (push_undo && gimp_item_is_attached (GIMP_ITEM (layer)))
{
GimpImage *image = gimp_item_get_image (GIMP_ITEM (layer));
gimp_image_undo_push_layer_opacity (image, NULL, layer);
}
layer->opacity = opacity;
g_signal_emit (layer, layer_signals[OPACITY_CHANGED], 0);
g_object_notify (G_OBJECT (layer), "opacity");
if (layer->opacity_node)
gegl_node_set (layer->opacity_node,
"value", layer->opacity,
NULL);
gimp_drawable_update (GIMP_DRAWABLE (layer),
0, 0,
gimp_item_get_width (GIMP_ITEM (layer)),
gimp_item_get_height (GIMP_ITEM (layer)));
}
}
gdouble
gimp_layer_get_opacity (const GimpLayer *layer)
{
g_return_val_if_fail (GIMP_IS_LAYER (layer), GIMP_OPACITY_OPAQUE);
return layer->opacity;
}
void
gimp_layer_set_mode (GimpLayer *layer,
GimpLayerModeEffects mode,
gboolean push_undo)
{
g_return_if_fail (GIMP_IS_LAYER (layer));
if (layer->mode != mode)
{
if (push_undo && gimp_item_is_attached (GIMP_ITEM (layer)))
{
GimpImage *image = gimp_item_get_image (GIMP_ITEM (layer));
gimp_image_undo_push_layer_mode (image, NULL, layer);
}
layer->mode = mode;
g_signal_emit (layer, layer_signals[MODE_CHANGED], 0);
g_object_notify (G_OBJECT (layer), "mode");
if (layer->opacity_node)
{
GeglNode *mode_node;
mode_node = gimp_drawable_get_mode_node (GIMP_DRAWABLE (layer));
gimp_gegl_node_set_layer_mode (mode_node, layer->mode, TRUE);
}
gimp_drawable_update (GIMP_DRAWABLE (layer),
0, 0,
gimp_item_get_width (GIMP_ITEM (layer)),
gimp_item_get_height (GIMP_ITEM (layer)));
}
}
GimpLayerModeEffects
gimp_layer_get_mode (const GimpLayer *layer)
{
g_return_val_if_fail (GIMP_IS_LAYER (layer), GIMP_NORMAL_MODE);
return layer->mode;
}
void
gimp_layer_set_lock_alpha (GimpLayer *layer,
gboolean lock_alpha,
gboolean push_undo)
{
g_return_if_fail (GIMP_IS_LAYER (layer));
g_return_if_fail (gimp_layer_can_lock_alpha (layer));
lock_alpha = lock_alpha ? TRUE : FALSE;
if (layer->lock_alpha != lock_alpha)
{
if (push_undo && gimp_item_is_attached (GIMP_ITEM (layer)))
{
GimpImage *image = gimp_item_get_image (GIMP_ITEM (layer));
gimp_image_undo_push_layer_lock_alpha (image, NULL, layer);
}
layer->lock_alpha = lock_alpha;
g_signal_emit (layer, layer_signals[LOCK_ALPHA_CHANGED], 0);
g_object_notify (G_OBJECT (layer), "lock-alpha");
}
}
gboolean
gimp_layer_get_lock_alpha (const GimpLayer *layer)
{
g_return_val_if_fail (GIMP_IS_LAYER (layer), FALSE);
return layer->lock_alpha;
}
gboolean
gimp_layer_can_lock_alpha (const GimpLayer *layer)
{
g_return_val_if_fail (GIMP_IS_LAYER (layer), FALSE);
if (gimp_viewable_get_children (GIMP_VIEWABLE (layer)))
return FALSE;
return TRUE;
}
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