mirror of https://github.com/GNOME/gimp.git
329 lines
9.5 KiB
C
329 lines
9.5 KiB
C
/* GIMP - The GNU Image Manipulation Program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "config.h"
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#include <stdlib.h>
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#include <string.h>
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#include <glib-object.h>
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#include "libgimpmath/gimpmath.h"
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#include "core-types.h"
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#include "gimpimage.h"
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#include "gimpimage-undo-push.h"
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#include "gimplayer.h"
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#include "gimplayermask.h"
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#include "gimpmarshal.h"
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#include "gimp-intl.h"
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enum
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{
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APPLY_CHANGED,
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EDIT_CHANGED,
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SHOW_CHANGED,
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LAST_SIGNAL
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};
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static gboolean gimp_layer_mask_is_attached (GimpItem *item);
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static GimpItem * gimp_layer_mask_duplicate (GimpItem *item,
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GType new_type);
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static gboolean gimp_layer_mask_rename (GimpItem *item,
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const gchar *new_name,
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const gchar *undo_desc,
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GError **error);
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static void gimp_layer_mask_real_edit_changed (GimpLayerMask *layer_mask);
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G_DEFINE_TYPE (GimpLayerMask, gimp_layer_mask, GIMP_TYPE_CHANNEL)
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#define parent_class gimp_layer_mask_parent_class
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static guint layer_mask_signals[LAST_SIGNAL] = { 0 };
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static void
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gimp_layer_mask_class_init (GimpLayerMaskClass *klass)
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{
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GimpViewableClass *viewable_class = GIMP_VIEWABLE_CLASS (klass);
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GimpItemClass *item_class = GIMP_ITEM_CLASS (klass);
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layer_mask_signals[APPLY_CHANGED] =
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g_signal_new ("apply-changed",
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G_TYPE_FROM_CLASS (klass),
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G_SIGNAL_RUN_FIRST,
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G_STRUCT_OFFSET (GimpLayerMaskClass, apply_changed),
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NULL, NULL,
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gimp_marshal_VOID__VOID,
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G_TYPE_NONE, 0);
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layer_mask_signals[EDIT_CHANGED] =
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g_signal_new ("edit-changed",
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G_TYPE_FROM_CLASS (klass),
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G_SIGNAL_RUN_FIRST,
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G_STRUCT_OFFSET (GimpLayerMaskClass, edit_changed),
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NULL, NULL,
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gimp_marshal_VOID__VOID,
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G_TYPE_NONE, 0);
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layer_mask_signals[SHOW_CHANGED] =
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g_signal_new ("show-changed",
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G_TYPE_FROM_CLASS (klass),
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G_SIGNAL_RUN_FIRST,
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G_STRUCT_OFFSET (GimpLayerMaskClass, show_changed),
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NULL, NULL,
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gimp_marshal_VOID__VOID,
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G_TYPE_NONE, 0);
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viewable_class->default_stock_id = "gimp-layer-mask";
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klass->edit_changed = gimp_layer_mask_real_edit_changed;
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item_class->is_attached = gimp_layer_mask_is_attached;
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item_class->duplicate = gimp_layer_mask_duplicate;
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item_class->rename = gimp_layer_mask_rename;
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item_class->translate_desc = _("Move Layer Mask");
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}
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static void
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gimp_layer_mask_init (GimpLayerMask *layer_mask)
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{
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layer_mask->layer = NULL;
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layer_mask->apply_mask = TRUE;
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layer_mask->edit_mask = TRUE;
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layer_mask->show_mask = FALSE;
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}
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static gboolean
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gimp_layer_mask_is_attached (GimpItem *item)
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{
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GimpLayerMask *mask = GIMP_LAYER_MASK (item);
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GimpLayer *layer = gimp_layer_mask_get_layer (mask);
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return (GIMP_IS_IMAGE (item->image) &&
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GIMP_IS_LAYER (layer) &&
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gimp_layer_get_mask (layer) == mask &&
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gimp_item_is_attached (GIMP_ITEM (layer)));
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}
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static GimpItem *
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gimp_layer_mask_duplicate (GimpItem *item,
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GType new_type)
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{
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GimpItem *new_item;
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g_return_val_if_fail (g_type_is_a (new_type, GIMP_TYPE_DRAWABLE), NULL);
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new_item = GIMP_ITEM_CLASS (parent_class)->duplicate (item, new_type);
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if (GIMP_IS_LAYER_MASK (new_item))
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{
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GimpLayerMask *layer_mask = GIMP_LAYER_MASK (item);
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GimpLayerMask *new_layer_mask = GIMP_LAYER_MASK (new_item);
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new_layer_mask->apply_mask = layer_mask->apply_mask;
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new_layer_mask->edit_mask = layer_mask->edit_mask;
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new_layer_mask->show_mask = layer_mask->show_mask;
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}
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return new_item;
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}
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static gboolean
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gimp_layer_mask_rename (GimpItem *item,
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const gchar *new_name,
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const gchar *undo_desc,
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GError **error)
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{
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/* reject renaming, layer masks are always named "<layer name> mask" */
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g_set_error (error, 0, 0, _("Cannot rename layer masks."));
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return FALSE;
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}
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GimpLayerMask *
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gimp_layer_mask_new (GimpImage *image,
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gint width,
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gint height,
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const gchar *name,
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const GimpRGB *color)
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{
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GimpLayerMask *layer_mask;
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layer_mask = g_object_new (GIMP_TYPE_LAYER_MASK, NULL);
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gimp_drawable_configure (GIMP_DRAWABLE (layer_mask),
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image,
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0, 0, width, height,
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GIMP_GRAY_IMAGE, name);
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/* set the layer_mask color and opacity */
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gimp_channel_set_color (GIMP_CHANNEL (layer_mask), color, FALSE);
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gimp_channel_set_show_masked (GIMP_CHANNEL (layer_mask), TRUE);
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/* selection mask variables */
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GIMP_CHANNEL (layer_mask)->x2 = width;
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GIMP_CHANNEL (layer_mask)->y2 = height;
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return layer_mask;
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}
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void
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gimp_layer_mask_set_layer (GimpLayerMask *layer_mask,
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GimpLayer *layer)
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{
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g_return_if_fail (GIMP_IS_LAYER_MASK (layer_mask));
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g_return_if_fail (layer == NULL || GIMP_IS_LAYER (layer));
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layer_mask->layer = layer;
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if (layer)
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{
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gchar *mask_name;
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GIMP_ITEM (layer_mask)->offset_x = GIMP_ITEM (layer)->offset_x;
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GIMP_ITEM (layer_mask)->offset_y = GIMP_ITEM (layer)->offset_y;
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mask_name = g_strdup_printf (_("%s mask"),
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gimp_object_get_name (GIMP_OBJECT (layer)));
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gimp_object_take_name (GIMP_OBJECT (layer_mask), mask_name);
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}
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}
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GimpLayer *
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gimp_layer_mask_get_layer (const GimpLayerMask *layer_mask)
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{
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g_return_val_if_fail (GIMP_IS_LAYER_MASK (layer_mask), NULL);
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return layer_mask->layer;
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}
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void
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gimp_layer_mask_set_apply (GimpLayerMask *layer_mask,
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gboolean apply,
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gboolean push_undo)
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{
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g_return_if_fail (GIMP_IS_LAYER_MASK (layer_mask));
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if (layer_mask->apply_mask != apply)
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{
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GimpImage *image = GIMP_ITEM (layer_mask)->image;
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if (push_undo)
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gimp_image_undo_push_layer_mask_apply (image, _("Apply Layer Mask"),
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layer_mask);
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layer_mask->apply_mask = apply ? TRUE : FALSE;
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if (layer_mask->layer)
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{
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GimpDrawable *drawable = GIMP_DRAWABLE (layer_mask->layer);
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gimp_drawable_update (drawable,
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0, 0,
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gimp_item_width (GIMP_ITEM (drawable)),
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gimp_item_height (GIMP_ITEM (drawable)));
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}
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g_signal_emit (layer_mask, layer_mask_signals[APPLY_CHANGED], 0);
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}
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}
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gboolean
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gimp_layer_mask_get_apply (const GimpLayerMask *layer_mask)
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{
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g_return_val_if_fail (GIMP_IS_LAYER_MASK (layer_mask), FALSE);
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return layer_mask->apply_mask;
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}
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void
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gimp_layer_mask_set_edit (GimpLayerMask *layer_mask,
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gboolean edit)
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{
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g_return_if_fail (GIMP_IS_LAYER_MASK (layer_mask));
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if (layer_mask->edit_mask != edit)
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{
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layer_mask->edit_mask = edit ? TRUE : FALSE;
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g_signal_emit (layer_mask, layer_mask_signals[EDIT_CHANGED], 0);
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}
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}
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gboolean
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gimp_layer_mask_get_edit (const GimpLayerMask *layer_mask)
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{
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g_return_val_if_fail (GIMP_IS_LAYER_MASK (layer_mask), FALSE);
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return layer_mask->edit_mask;
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}
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static void
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gimp_layer_mask_real_edit_changed (GimpLayerMask *layer_mask)
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{
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gimp_image_selection_control (GIMP_ITEM (layer_mask)->image,
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GIMP_SELECTION_LAYER_ON);
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}
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void
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gimp_layer_mask_set_show (GimpLayerMask *layer_mask,
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gboolean show,
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gboolean push_undo)
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{
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g_return_if_fail (GIMP_IS_LAYER_MASK (layer_mask));
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if (layer_mask->show_mask != show)
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{
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GimpImage *image = GIMP_ITEM (layer_mask)->image;
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if (push_undo)
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gimp_image_undo_push_layer_mask_show (image, _("Show Layer Mask"),
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layer_mask);
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layer_mask->show_mask = show ? TRUE : FALSE;
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if (layer_mask->layer)
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{
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GimpDrawable *drawable = GIMP_DRAWABLE (layer_mask->layer);
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gimp_drawable_update (drawable,
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0, 0,
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gimp_item_width (GIMP_ITEM (drawable)),
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gimp_item_height (GIMP_ITEM (drawable)));
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}
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g_signal_emit (layer_mask, layer_mask_signals[SHOW_CHANGED], 0);
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}
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}
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gboolean
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gimp_layer_mask_get_show (const GimpLayerMask *layer_mask)
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{
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g_return_val_if_fail (GIMP_IS_LAYER_MASK (layer_mask), FALSE);
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return layer_mask->show_mask;
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}
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