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gimp/app/core/gimplayermask.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 <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <gegl.h>
#include "core-types.h"
#include "gegl/gimp-babl.h"
#include "gimperror.h"
#include "gimpimage.h"
#include "gimplayer.h"
#include "gimplayermask.h"
#include "gimp-intl.h"
static void gimp_layer_mask_preview_freeze (GimpViewable *viewable);
static void gimp_layer_mask_preview_thaw (GimpViewable *viewable);
static gboolean gimp_layer_mask_is_attached (GimpItem *item);
static gboolean gimp_layer_mask_is_content_locked (GimpItem *item);
static gboolean gimp_layer_mask_is_position_locked (GimpItem *item);
static GimpItemTree * gimp_layer_mask_get_tree (GimpItem *item);
static GimpItem * gimp_layer_mask_duplicate (GimpItem *item,
GType new_type);
static gboolean gimp_layer_mask_rename (GimpItem *item,
const gchar *new_name,
const gchar *undo_desc,
GError **error);
static void gimp_layer_mask_convert_type (GimpDrawable *drawable,
GimpImage *dest_image,
const Babl *new_format,
GimpColorProfile *src_profile,
GimpColorProfile *dest_profile,
GeglDitherMethod layer_dither_type,
GeglDitherMethod mask_dither_type,
gboolean push_undo,
GimpProgress *progress);
G_DEFINE_TYPE (GimpLayerMask, gimp_layer_mask, GIMP_TYPE_CHANNEL)
#define parent_class gimp_layer_mask_parent_class
static void
gimp_layer_mask_class_init (GimpLayerMaskClass *klass)
{
GimpViewableClass *viewable_class = GIMP_VIEWABLE_CLASS (klass);
GimpItemClass *item_class = GIMP_ITEM_CLASS (klass);
GimpDrawableClass *drawable_class = GIMP_DRAWABLE_CLASS (klass);
viewable_class->default_icon_name = "gimp-layer-mask";
viewable_class->preview_freeze = gimp_layer_mask_preview_freeze;
viewable_class->preview_thaw = gimp_layer_mask_preview_thaw;
item_class->is_attached = gimp_layer_mask_is_attached;
item_class->is_content_locked = gimp_layer_mask_is_content_locked;
item_class->is_position_locked = gimp_layer_mask_is_position_locked;
item_class->get_tree = gimp_layer_mask_get_tree;
item_class->duplicate = gimp_layer_mask_duplicate;
item_class->rename = gimp_layer_mask_rename;
item_class->translate_desc = C_("undo-type", "Move Layer Mask");
item_class->to_selection_desc = C_("undo-type", "Layer Mask to Selection");
drawable_class->convert_type = gimp_layer_mask_convert_type;
}
static void
gimp_layer_mask_init (GimpLayerMask *layer_mask)
{
layer_mask->layer = NULL;
}
static void
gimp_layer_mask_preview_freeze (GimpViewable *viewable)
{
GimpLayerMask *mask = GIMP_LAYER_MASK (viewable);
GimpLayer *layer = gimp_layer_mask_get_layer (mask);
if (layer)
{
GimpViewable *parent = gimp_viewable_get_parent (GIMP_VIEWABLE (layer));
if (! parent && gimp_item_is_attached (GIMP_ITEM (layer)))
parent = GIMP_VIEWABLE (gimp_item_get_image (GIMP_ITEM (layer)));
if (parent)
gimp_viewable_preview_freeze (parent);
}
}
static void
gimp_layer_mask_preview_thaw (GimpViewable *viewable)
{
GimpLayerMask *mask = GIMP_LAYER_MASK (viewable);
GimpLayer *layer = gimp_layer_mask_get_layer (mask);
if (layer)
{
GimpViewable *parent = gimp_viewable_get_parent (GIMP_VIEWABLE (layer));
if (! parent && gimp_item_is_attached (GIMP_ITEM (layer)))
parent = GIMP_VIEWABLE (gimp_item_get_image (GIMP_ITEM (layer)));
if (parent)
gimp_viewable_preview_thaw (parent);
}
}
static gboolean
gimp_layer_mask_is_content_locked (GimpItem *item)
{
GimpLayerMask *mask = GIMP_LAYER_MASK (item);
GimpLayer *layer = gimp_layer_mask_get_layer (mask);
if (layer)
return gimp_item_is_content_locked (GIMP_ITEM (layer));
return FALSE;
}
static gboolean
gimp_layer_mask_is_position_locked (GimpItem *item)
{
GimpLayerMask *mask = GIMP_LAYER_MASK (item);
GimpLayer *layer = gimp_layer_mask_get_layer (mask);
if (layer)
return gimp_item_is_position_locked (GIMP_ITEM (layer));
return FALSE;
}
static gboolean
gimp_layer_mask_is_attached (GimpItem *item)
{
GimpLayerMask *mask = GIMP_LAYER_MASK (item);
GimpLayer *layer = gimp_layer_mask_get_layer (mask);
return (GIMP_IS_IMAGE (gimp_item_get_image (item)) &&
GIMP_IS_LAYER (layer) &&
gimp_layer_get_mask (layer) == mask &&
gimp_item_is_attached (GIMP_ITEM (layer)));
}
static GimpItemTree *
gimp_layer_mask_get_tree (GimpItem *item)
{
return NULL;
}
static GimpItem *
gimp_layer_mask_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);
return new_item;
}
static gboolean
gimp_layer_mask_rename (GimpItem *item,
const gchar *new_name,
const gchar *undo_desc,
GError **error)
{
/* reject renaming, layer masks are always named "<layer name> mask" */
g_set_error (error, GIMP_ERROR, GIMP_FAILED,
_("Cannot rename layer masks."));
return FALSE;
}
static void
gimp_layer_mask_convert_type (GimpDrawable *drawable,
GimpImage *dest_image,
const Babl *new_format,
GimpColorProfile *src_profile,
GimpColorProfile *dest_profile,
GeglDitherMethod layer_dither_type,
GeglDitherMethod mask_dither_type,
gboolean push_undo,
GimpProgress *progress)
{
new_format =
gimp_babl_mask_format (gimp_babl_format_get_precision (new_format));
GIMP_DRAWABLE_CLASS (parent_class)->convert_type (drawable, dest_image,
new_format,
src_profile,
dest_profile,
layer_dither_type,
mask_dither_type,
push_undo,
progress);
}
GimpLayerMask *
gimp_layer_mask_new (GimpImage *image,
gint width,
gint height,
const gchar *name,
const GimpRGB *color)
{
GimpLayerMask *layer_mask;
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 (color != NULL, NULL);
layer_mask =
GIMP_LAYER_MASK (gimp_drawable_new (GIMP_TYPE_LAYER_MASK,
image, name,
0, 0, width, height,
gimp_image_get_mask_format (image)));
/* set the layer_mask color and opacity */
gimp_channel_set_color (GIMP_CHANNEL (layer_mask), color, FALSE);
gimp_channel_set_show_masked (GIMP_CHANNEL (layer_mask), TRUE);
/* selection mask variables */
GIMP_CHANNEL (layer_mask)->x2 = width;
GIMP_CHANNEL (layer_mask)->y2 = height;
return layer_mask;
}
void
gimp_layer_mask_set_layer (GimpLayerMask *layer_mask,
GimpLayer *layer)
{
g_return_if_fail (GIMP_IS_LAYER_MASK (layer_mask));
g_return_if_fail (layer == NULL || GIMP_IS_LAYER (layer));
layer_mask->layer = layer;
if (layer)
{
gchar *mask_name;
gint offset_x;
gint offset_y;
gimp_item_get_offset (GIMP_ITEM (layer), &offset_x, &offset_y);
gimp_item_set_offset (GIMP_ITEM (layer_mask), offset_x, offset_y);
mask_name = g_strdup_printf (_("%s mask"), gimp_object_get_name (layer));
gimp_object_take_name (GIMP_OBJECT (layer_mask), mask_name);
}
}
GimpLayer *
gimp_layer_mask_get_layer (GimpLayerMask *layer_mask)
{
g_return_val_if_fail (GIMP_IS_LAYER_MASK (layer_mask), NULL);
return layer_mask->layer;
}
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