PIKApp/app/core/pikalayermask.c

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2023-09-26 00:35:21 +02:00
/* PIKA - Photo and Image Kooker Application
* a rebranding of The GNU Image Manipulation Program (created with heckimp)
* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
*
* Original copyright, applying to most contents (license remains unchanged):
* 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/pika-babl.h"
#include "pikaerror.h"
#include "pikaimage.h"
#include "pikalayer.h"
#include "pikalayermask.h"
#include "pika-intl.h"
static void pika_layer_mask_preview_freeze (PikaViewable *viewable);
static void pika_layer_mask_preview_thaw (PikaViewable *viewable);
static gboolean pika_layer_mask_is_attached (PikaItem *item);
static gboolean pika_layer_mask_is_content_locked (PikaItem *item,
PikaItem **locked_item);
static gboolean pika_layer_mask_is_position_locked (PikaItem *item,
PikaItem **locked_item,
gboolean check_children);
static PikaItemTree * pika_layer_mask_get_tree (PikaItem *item);
static PikaItem * pika_layer_mask_duplicate (PikaItem *item,
GType new_type);
static gboolean pika_layer_mask_rename (PikaItem *item,
const gchar *new_name,
const gchar *undo_desc,
GError **error);
static void pika_layer_mask_bounding_box_changed (PikaDrawable *drawable);
static void pika_layer_mask_convert_type (PikaDrawable *drawable,
PikaImage *dest_image,
const Babl *new_format,
PikaColorProfile *src_profile,
PikaColorProfile *dest_profile,
GeglDitherMethod layer_dither_type,
GeglDitherMethod mask_dither_type,
gboolean push_undo,
PikaProgress *progress);
G_DEFINE_TYPE (PikaLayerMask, pika_layer_mask, PIKA_TYPE_CHANNEL)
#define parent_class pika_layer_mask_parent_class
static void
pika_layer_mask_class_init (PikaLayerMaskClass *klass)
{
PikaViewableClass *viewable_class = PIKA_VIEWABLE_CLASS (klass);
PikaItemClass *item_class = PIKA_ITEM_CLASS (klass);
PikaDrawableClass *drawable_class = PIKA_DRAWABLE_CLASS (klass);
viewable_class->default_icon_name = "pika-layer-mask";
viewable_class->preview_freeze = pika_layer_mask_preview_freeze;
viewable_class->preview_thaw = pika_layer_mask_preview_thaw;
item_class->is_attached = pika_layer_mask_is_attached;
item_class->is_content_locked = pika_layer_mask_is_content_locked;
item_class->is_position_locked = pika_layer_mask_is_position_locked;
item_class->get_tree = pika_layer_mask_get_tree;
item_class->duplicate = pika_layer_mask_duplicate;
item_class->rename = pika_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->bounding_box_changed = pika_layer_mask_bounding_box_changed;
drawable_class->convert_type = pika_layer_mask_convert_type;
}
static void
pika_layer_mask_init (PikaLayerMask *layer_mask)
{
layer_mask->layer = NULL;
}
static void
pika_layer_mask_preview_freeze (PikaViewable *viewable)
{
PikaLayerMask *mask = PIKA_LAYER_MASK (viewable);
PikaLayer *layer = pika_layer_mask_get_layer (mask);
if (layer)
{
PikaViewable *parent = pika_viewable_get_parent (PIKA_VIEWABLE (layer));
if (! parent && pika_item_is_attached (PIKA_ITEM (layer)))
parent = PIKA_VIEWABLE (pika_item_get_image (PIKA_ITEM (layer)));
if (parent)
pika_viewable_preview_freeze (parent);
}
}
static void
pika_layer_mask_preview_thaw (PikaViewable *viewable)
{
PikaLayerMask *mask = PIKA_LAYER_MASK (viewable);
PikaLayer *layer = pika_layer_mask_get_layer (mask);
if (layer)
{
PikaViewable *parent = pika_viewable_get_parent (PIKA_VIEWABLE (layer));
if (! parent && pika_item_is_attached (PIKA_ITEM (layer)))
parent = PIKA_VIEWABLE (pika_item_get_image (PIKA_ITEM (layer)));
if (parent)
pika_viewable_preview_thaw (parent);
}
}
static gboolean
pika_layer_mask_is_content_locked (PikaItem *item,
PikaItem **locked_item)
{
PikaLayerMask *mask = PIKA_LAYER_MASK (item);
PikaLayer *layer = pika_layer_mask_get_layer (mask);
if (layer)
return pika_item_is_content_locked (PIKA_ITEM (layer), locked_item);
return FALSE;
}
static gboolean
pika_layer_mask_is_position_locked (PikaItem *item,
PikaItem **locked_item,
gboolean check_children)
{
PikaLayerMask *mask = PIKA_LAYER_MASK (item);
PikaLayer *layer = pika_layer_mask_get_layer (mask);
if (layer)
return pika_item_is_position_locked (PIKA_ITEM (layer), locked_item);
return FALSE;
}
static gboolean
pika_layer_mask_is_attached (PikaItem *item)
{
PikaLayerMask *mask = PIKA_LAYER_MASK (item);
PikaLayer *layer = pika_layer_mask_get_layer (mask);
return (PIKA_IS_IMAGE (pika_item_get_image (item)) &&
PIKA_IS_LAYER (layer) &&
pika_layer_get_mask (layer) == mask &&
pika_item_is_attached (PIKA_ITEM (layer)));
}
static PikaItemTree *
pika_layer_mask_get_tree (PikaItem *item)
{
return NULL;
}
static PikaItem *
pika_layer_mask_duplicate (PikaItem *item,
GType new_type)
{
PikaItem *new_item;
g_return_val_if_fail (g_type_is_a (new_type, PIKA_TYPE_DRAWABLE), NULL);
new_item = PIKA_ITEM_CLASS (parent_class)->duplicate (item, new_type);
return new_item;
}
static gboolean
pika_layer_mask_rename (PikaItem *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, PIKA_ERROR, PIKA_FAILED,
_("Cannot rename layer masks."));
return FALSE;
}
static void
pika_layer_mask_bounding_box_changed (PikaDrawable *drawable)
{
PikaLayerMask *mask = PIKA_LAYER_MASK (drawable);
PikaLayer *layer = pika_layer_mask_get_layer (mask);
if (PIKA_DRAWABLE_CLASS (parent_class)->bounding_box_changed)
PIKA_DRAWABLE_CLASS (parent_class)->bounding_box_changed (drawable);
if (layer)
pika_drawable_update_bounding_box (PIKA_DRAWABLE (layer));
}
static void
pika_layer_mask_convert_type (PikaDrawable *drawable,
PikaImage *dest_image,
const Babl *new_format,
PikaColorProfile *src_profile,
PikaColorProfile *dest_profile,
GeglDitherMethod layer_dither_type,
GeglDitherMethod mask_dither_type,
gboolean push_undo,
PikaProgress *progress)
{
new_format =
pika_babl_mask_format (pika_babl_format_get_precision (new_format));
PIKA_DRAWABLE_CLASS (parent_class)->convert_type (drawable, dest_image,
new_format,
src_profile,
dest_profile,
layer_dither_type,
mask_dither_type,
push_undo,
progress);
}
PikaLayerMask *
pika_layer_mask_new (PikaImage *image,
gint width,
gint height,
const gchar *name,
const PikaRGB *color)
{
PikaLayerMask *layer_mask;
g_return_val_if_fail (PIKA_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 =
PIKA_LAYER_MASK (pika_drawable_new (PIKA_TYPE_LAYER_MASK,
image, name,
0, 0, width, height,
pika_image_get_mask_format (image)));
/* set the layer_mask color and opacity */
pika_channel_set_color (PIKA_CHANNEL (layer_mask), color, FALSE);
pika_channel_set_show_masked (PIKA_CHANNEL (layer_mask), TRUE);
/* selection mask variables */
PIKA_CHANNEL (layer_mask)->x2 = width;
PIKA_CHANNEL (layer_mask)->y2 = height;
return layer_mask;
}
void
pika_layer_mask_set_layer (PikaLayerMask *layer_mask,
PikaLayer *layer)
{
g_return_if_fail (PIKA_IS_LAYER_MASK (layer_mask));
g_return_if_fail (layer == NULL || PIKA_IS_LAYER (layer));
layer_mask->layer = layer;
if (layer)
{
gchar *mask_name;
gint offset_x;
gint offset_y;
pika_item_get_offset (PIKA_ITEM (layer), &offset_x, &offset_y);
pika_item_set_offset (PIKA_ITEM (layer_mask), offset_x, offset_y);
mask_name = g_strdup_printf (_("%s mask"), pika_object_get_name (layer));
pika_object_take_name (PIKA_OBJECT (layer_mask), mask_name);
}
}
PikaLayer *
pika_layer_mask_get_layer (PikaLayerMask *layer_mask)
{
g_return_val_if_fail (PIKA_IS_LAYER_MASK (layer_mask), NULL);
return layer_mask->layer;
}