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gimp/app/gimpdrawable.c

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/* The GIMP -- an 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 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <gtk/gtk.h>
#include "libgimpcolor/gimpcolor.h"
#include "libgimpmath/gimpmath.h"
#include "apptypes.h"
#include "paint-funcs/paint-funcs.h"
#include "gimage_mask.h"
#include "gimpchannel.h"
#include "gimpdrawable.h"
#include "gimpdrawable-preview.h"
#include "gimpimage.h"
#include "gimplayer.h"
#include "gimplist.h"
#include "gimppreviewcache.h"
#include "gimpparasite.h"
#include "parasitelist.h"
#include "pixel_region.h"
#include "tile.h"
#include "tile_manager.h"
#include "undo.h"
#include "libgimp/gimpparasite.h"
#include "libgimp/gimpintl.h"
enum
{
VISIBILITY_CHANGED,
REMOVED,
LAST_SIGNAL
};
static void gimp_drawable_class_init (GimpDrawableClass *klass);
static void gimp_drawable_init (GimpDrawable *drawable);
static void gimp_drawable_destroy (GtkObject *object);
static void gimp_drawable_name_changed (GimpObject *drawable);
static void gimp_drawable_invalidate_preview (GimpViewable *viewable);
/* private variables */
static guint gimp_drawable_signals[LAST_SIGNAL] = { 0 };
static GimpViewableClass *parent_class = NULL;
static gint global_drawable_ID = 1;
static GHashTable *gimp_drawable_table = NULL;
GtkType
gimp_drawable_get_type (void)
{
static GtkType drawable_type = 0;
if (! drawable_type)
{
GtkTypeInfo drawable_info =
{
"GimpDrawable",
sizeof (GimpDrawable),
sizeof (GimpDrawableClass),
(GtkClassInitFunc) gimp_drawable_class_init,
(GtkObjectInitFunc) gimp_drawable_init,
/* reserved_1 */ NULL,
/* reserved_2 */ NULL,
(GtkClassInitFunc) NULL,
};
drawable_type = gtk_type_unique (GIMP_TYPE_VIEWABLE, &drawable_info);
}
return drawable_type;
}
static void
gimp_drawable_class_init (GimpDrawableClass *klass)
{
GtkObjectClass *object_class;
GimpObjectClass *gimp_object_class;
GimpViewableClass *viewable_class;
object_class = (GtkObjectClass *) klass;
gimp_object_class = (GimpObjectClass *) klass;
viewable_class = (GimpViewableClass *) klass;
parent_class = gtk_type_class (GIMP_TYPE_VIEWABLE);
gimp_drawable_signals[VISIBILITY_CHANGED] =
gtk_signal_new ("visibility_changed",
GTK_RUN_FIRST,
object_class->type,
GTK_SIGNAL_OFFSET (GimpDrawableClass,
visibility_changed),
gtk_signal_default_marshaller,
GTK_TYPE_NONE, 0);
gimp_drawable_signals[REMOVED] =
gtk_signal_new ("removed",
GTK_RUN_FIRST,
object_class->type,
GTK_SIGNAL_OFFSET (GimpDrawableClass,
removed),
gtk_signal_default_marshaller,
GTK_TYPE_NONE, 0);
gtk_object_class_add_signals (object_class, gimp_drawable_signals,
LAST_SIGNAL);
object_class->destroy = gimp_drawable_destroy;
gimp_object_class->name_changed = gimp_drawable_name_changed;
viewable_class->invalidate_preview = gimp_drawable_invalidate_preview;
viewable_class->get_preview = gimp_drawable_get_preview;
klass->removed = NULL;
}
static void
gimp_drawable_init (GimpDrawable *drawable)
{
drawable->tiles = NULL;
drawable->visible = FALSE;
drawable->width = 0;
drawable->height = 0;
drawable->offset_x = 0;
drawable->offset_y = 0;
drawable->bytes = 0;
drawable->ID = global_drawable_ID++;
drawable->tattoo = 0;
drawable->gimage = NULL;
drawable->type = -1;
drawable->has_alpha = FALSE;
drawable->preview_cache = NULL;
drawable->preview_valid = FALSE;
drawable->parasites = parasite_list_new ();
drawable->preview_cache = NULL;
drawable->preview_valid = FALSE;
if (gimp_drawable_table == NULL)
gimp_drawable_table = g_hash_table_new (g_direct_hash, NULL);
g_hash_table_insert (gimp_drawable_table,
GINT_TO_POINTER (drawable->ID),
(gpointer) drawable);
}
static void
gimp_drawable_destroy (GtkObject *object)
{
GimpDrawable *drawable;
g_return_if_fail (GIMP_IS_DRAWABLE (object));
drawable = GIMP_DRAWABLE (object);
g_hash_table_remove (gimp_drawable_table, GINT_TO_POINTER (drawable->ID));
if (drawable->tiles)
tile_manager_destroy (drawable->tiles);
if (drawable->preview_cache)
gimp_preview_cache_invalidate (&drawable->preview_cache);
if (drawable->parasites)
gtk_object_unref (GTK_OBJECT (drawable->parasites));
if (GTK_OBJECT_CLASS (parent_class)->destroy)
GTK_OBJECT_CLASS (parent_class)->destroy (object);
}
static void
gimp_drawable_name_changed (GimpObject *object)
{
GimpDrawable *drawable;
GimpDrawable *drawable2;
GList *list, *list2, *base_list;
gint unique_ext = 0;
gchar *ext;
gchar *new_name = NULL;
g_return_if_fail (GIMP_IS_DRAWABLE (object));
drawable = GIMP_DRAWABLE (object);
/* if no other layers to check name against */
if (drawable->gimage == NULL ||
gimp_image_is_empty (drawable->gimage))
return;
if (GIMP_IS_LAYER (drawable))
base_list = GIMP_LIST (drawable->gimage->layers)->list;
else if (GIMP_IS_CHANNEL (drawable))
base_list = GIMP_LIST (drawable->gimage->channels)->list;
else
base_list = NULL;
for (list = base_list;
list;
list = g_list_next (list))
{
drawable2 = GIMP_DRAWABLE (list->data);
if (drawable != drawable2 &&
strcmp (gimp_object_get_name (GIMP_OBJECT (drawable)),
gimp_object_get_name (GIMP_OBJECT (drawable2))) == 0)
{
ext = strrchr (GIMP_OBJECT (drawable)->name, '#');
if (ext)
{
gchar *ext_str;
unique_ext = atoi (ext + 1);
ext_str = g_strdup_printf ("%d", unique_ext);
/* check if the extension really is of the form "#<n>" */
if (! strcmp (ext_str, ext + 1))
{
*ext = '\0';
}
else
{
unique_ext = 0;
}
g_free (ext_str);
}
else
{
unique_ext = 0;
}
do
{
unique_ext++;
g_free (new_name);
new_name = g_strdup_printf ("%s#%d",
GIMP_OBJECT (drawable)->name,
unique_ext);
for (list2 = base_list; list2; list2 = g_list_next (list2))
{
drawable2 = GIMP_DRAWABLE (list2->data);
if (drawable == drawable2)
continue;
if (! strcmp (GIMP_OBJECT (drawable2)->name, new_name))
{
break;
}
}
}
while (list2);
g_free (GIMP_OBJECT (drawable)->name);
GIMP_OBJECT (drawable)->name = new_name;
break;
}
}
}
static void
gimp_drawable_invalidate_preview (GimpViewable *viewable)
{
GimpDrawable *drawable;
GimpImage *gimage;
drawable = GIMP_DRAWABLE (viewable);
drawable->preview_valid = FALSE;
gimage = gimp_drawable_gimage (drawable);
if (gimage)
gimage->comp_preview_valid = FALSE;
}
void
gimp_drawable_configure (GimpDrawable *drawable,
GimpImage *gimage,
gint width,
gint height,
GimpImageType type,
const gchar *name)
{
gint bpp;
gboolean alpha;
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
if (!name)
name = _("unnamed");
switch (type)
{
case RGB_GIMAGE:
bpp = 3; alpha = FALSE; break;
case GRAY_GIMAGE:
bpp = 1; alpha = FALSE; break;
case RGBA_GIMAGE:
bpp = 4; alpha = TRUE; break;
case GRAYA_GIMAGE:
bpp = 2; alpha = TRUE; break;
case INDEXED_GIMAGE:
bpp = 1; alpha = FALSE; break;
case INDEXEDA_GIMAGE:
bpp = 2; alpha = TRUE; break;
default:
g_message (_("Layer type %d not supported."), type);
return;
}
drawable->width = width;
drawable->height = height;
drawable->bytes = bpp;
drawable->type = type;
drawable->has_alpha = alpha;
drawable->offset_x = 0;
drawable->offset_y = 0;
if (drawable->tiles)
tile_manager_destroy (drawable->tiles);
drawable->tiles = tile_manager_new (width, height, bpp);
gimp_drawable_set_visible (drawable, TRUE);
if (gimage)
gimp_drawable_set_gimage (drawable, gimage);
gimp_object_set_name (GIMP_OBJECT (drawable), name);
/* preview variables */
drawable->preview_cache = NULL;
drawable->preview_valid = FALSE;
}
gint
gimp_drawable_get_ID (GimpDrawable *drawable)
{
g_return_val_if_fail (drawable != NULL, -1);
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), -1);
return drawable->ID;
}
GimpDrawable *
gimp_drawable_get_by_ID (gint drawable_id)
{
if (gimp_drawable_table == NULL)
return NULL;
return (GimpDrawable *) g_hash_table_lookup (gimp_drawable_table,
GINT_TO_POINTER (drawable_id));
}
GimpImage *
gimp_drawable_gimage (const GimpDrawable *drawable)
{
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), NULL);
return drawable->gimage;
}
void
gimp_drawable_set_gimage (GimpDrawable *drawable,
GimpImage *gimage)
{
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
if (gimage == NULL)
drawable->tattoo = 0;
else if (drawable->tattoo == 0 || drawable->gimage != gimage )
drawable->tattoo = gimp_image_get_new_tattoo (gimage);
drawable->gimage = gimage;
}
void
gimp_drawable_merge_shadow (GimpDrawable *drawable,
gint undo)
{
GimpImage *gimage;
PixelRegion shadowPR;
gint x1, y1, x2, y2;
g_return_if_fail (drawable != NULL);
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
gimage = gimp_drawable_gimage (drawable);
g_return_if_fail (gimage != NULL);
g_return_if_fail (gimage->shadow != NULL);
/* A useful optimization here is to limit the update to the
* extents of the selection mask, as it cannot extend beyond
* them.
*/
gimp_drawable_mask_bounds (drawable, &x1, &y1, &x2, &y2);
pixel_region_init (&shadowPR, gimage->shadow, x1, y1,
(x2 - x1), (y2 - y1), FALSE);
gimp_image_apply_image (gimage, drawable, &shadowPR, undo, OPAQUE_OPACITY,
REPLACE_MODE, NULL, x1, y1);
}
void
gimp_drawable_fill (GimpDrawable *drawable,
const GimpRGB *color)
{
GimpImage *gimage;
PixelRegion destPR;
guchar c[MAX_CHANNELS];
guchar i;
g_return_if_fail (drawable != NULL);
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
gimage = gimp_drawable_gimage (drawable);
g_return_if_fail (gimage != NULL);
switch (gimp_drawable_type (drawable))
{
case RGB_GIMAGE: case RGBA_GIMAGE:
gimp_rgba_get_uchar (color,
&c[RED_PIX],
&c[GREEN_PIX],
&c[BLUE_PIX],
&c[ALPHA_PIX]);
if (gimp_drawable_type (drawable) != RGBA_GIMAGE)
c[ALPHA_PIX] = 255;
break;
case GRAY_GIMAGE: case GRAYA_GIMAGE:
gimp_rgba_get_uchar (color,
&c[GRAY_PIX],
NULL,
NULL,
&c[ALPHA_G_PIX]);
if (gimp_drawable_type (drawable) != GRAYA_GIMAGE)
c[ALPHA_G_PIX] = 255;
break;
case INDEXED_GIMAGE: case INDEXEDA_GIMAGE:
gimp_rgb_get_uchar (color,
&c[RED_PIX],
&c[GREEN_PIX],
&c[BLUE_PIX]);
gimp_image_transform_color (gimage, drawable, c, &i, RGB);
c[INDEXED_PIX] = i;
if (gimp_drawable_type (drawable) == INDEXEDA_GIMAGE)
gimp_rgba_get_uchar (color,
NULL,
NULL,
NULL,
&c[ALPHA_I_PIX]);
break;
default:
g_message (_("Can't fill unknown image type."));
break;
}
pixel_region_init (&destPR,
gimp_drawable_data (drawable),
0, 0,
gimp_drawable_width (drawable),
gimp_drawable_height (drawable),
TRUE);
color_region (&destPR, c);
}
gboolean
gimp_drawable_mask_bounds (GimpDrawable *drawable,
gint *x1,
gint *y1,
gint *x2,
gint *y2)
{
GimpImage *gimage;
gint off_x, off_y;
g_return_val_if_fail (drawable != NULL, FALSE);
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), FALSE);
gimage = gimp_drawable_gimage (drawable);
g_return_val_if_fail (gimage != NULL, FALSE);
if (gimage_mask_bounds (gimage, x1, y1, x2, y2))
{
gimp_drawable_offsets (drawable, &off_x, &off_y);
*x1 = CLAMP (*x1 - off_x, 0, gimp_drawable_width (drawable));
*y1 = CLAMP (*y1 - off_y, 0, gimp_drawable_height (drawable));
*x2 = CLAMP (*x2 - off_x, 0, gimp_drawable_width (drawable));
*y2 = CLAMP (*y2 - off_y, 0, gimp_drawable_height (drawable));
return TRUE;
}
else
{
*x2 = gimp_drawable_width (drawable);
*y2 = gimp_drawable_height (drawable);
return FALSE;
}
}
/* The removed signal is sent out when the layer is no longer
* associcated with an image. It's needed because layers aren't
* destroyed immediately, but kept around for undo purposes. Connect
* to the removed signal to update bits of UI that are tied to a
* particular layer.
*/
void
gimp_drawable_removed (GimpDrawable *drawable)
{
g_return_if_fail (drawable != NULL);
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
gtk_signal_emit (GTK_OBJECT (drawable), gimp_drawable_signals[REMOVED]);
}
gboolean
gimp_drawable_has_alpha (const GimpDrawable *drawable)
{
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), FALSE);
return drawable->has_alpha;
}
GimpImageType
gimp_drawable_type (const GimpDrawable *drawable)
{
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), -1);
return drawable->type;
}
GimpImageType
gimp_drawable_type_with_alpha (const GimpDrawable *drawable)
{
GimpImageType type;
gboolean has_alpha;
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), -1);
type = gimp_drawable_type (drawable);
has_alpha = gimp_drawable_has_alpha (drawable);
if (has_alpha)
{
return type;
}
else
{
switch (type)
{
case RGB_GIMAGE:
return RGBA_GIMAGE; break;
case GRAY_GIMAGE:
return GRAYA_GIMAGE; break;
case INDEXED_GIMAGE:
return INDEXEDA_GIMAGE; break;
default:
g_assert_not_reached ();
break;
}
}
return 0;
}
gboolean
gimp_drawable_get_visible (const GimpDrawable *drawable)
{
g_return_val_if_fail (drawable != NULL, FALSE);
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), FALSE);
return drawable->visible;
}
void
gimp_drawable_set_visible (GimpDrawable *drawable,
gboolean visible)
{
g_return_if_fail (drawable != NULL);
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
visible = visible ? TRUE : FALSE;
if (drawable->visible != visible)
{
drawable->visible = visible;
gtk_signal_emit (GTK_OBJECT (drawable),
gimp_drawable_signals[VISIBILITY_CHANGED]);
}
}
guchar *
gimp_drawable_get_color_at (GimpDrawable *drawable,
gint x,
gint y)
{
Tile *tile;
guchar *src;
guchar *dest;
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), NULL);
g_return_val_if_fail (gimp_drawable_gimage (drawable) ||
!gimp_drawable_is_indexed (drawable), NULL);
/* do not make this a g_return_if_fail() */
if ( !(x >= 0 && x < drawable->width && y >= 0 && y < drawable->height))
return NULL;
dest = g_new (guchar, 5);
tile = tile_manager_get_tile (gimp_drawable_data (drawable), x, y,
TRUE, FALSE);
src = tile_data_pointer (tile, x % TILE_WIDTH, y % TILE_HEIGHT);
gimp_image_get_color (gimp_drawable_gimage (drawable),
gimp_drawable_type (drawable), dest, src);
if (GIMP_IMAGE_TYPE_HAS_ALPHA (gimp_drawable_type (drawable)))
dest[3] = src[gimp_drawable_bytes (drawable) - 1];
else
dest[3] = 255;
if (gimp_drawable_is_indexed (drawable))
dest[4] = src[0];
else
dest[4] = 0;
tile_release (tile, FALSE);
return dest;
}
GimpParasite *
gimp_drawable_parasite_find (const GimpDrawable *drawable,
const gchar *name)
{
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), NULL);
return parasite_list_find (drawable->parasites, name);
}
static void
gimp_drawable_parasite_list_foreach_func (gchar *key,
GimpParasite *p,
gchar ***cur)
{
*(*cur)++ = (gchar *) g_strdup (key);
}
gchar **
gimp_drawable_parasite_list (const GimpDrawable *drawable,
gint *count)
{
gchar **list;
gchar **cur;
g_return_val_if_fail (drawable != NULL, NULL);
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), NULL);
g_return_val_if_fail (count != NULL, NULL);
*count = parasite_list_length (drawable->parasites);
cur = list = g_new (gchar *, *count);
parasite_list_foreach (drawable->parasites,
(GHFunc) gimp_drawable_parasite_list_foreach_func,
&cur);
return list;
}
void
gimp_drawable_parasite_attach (GimpDrawable *drawable,
GimpParasite *parasite)
{
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
/* only set the dirty bit manually if we can be saved and the new
parasite differs from the current one and we arn't undoable */
if (gimp_parasite_is_undoable (parasite))
{
/* do a group in case we have attach_parent set */
undo_push_group_start (drawable->gimage, PARASITE_ATTACH_UNDO);
undo_push_drawable_parasite (drawable->gimage, drawable, parasite);
}
else if (gimp_parasite_is_persistent (parasite) &&
! gimp_parasite_compare (parasite,
gimp_drawable_parasite_find
(drawable, gimp_parasite_name (parasite))))
{
undo_push_cantundo (drawable->gimage, _("parasite attach to drawable"));
}
parasite_list_add (drawable->parasites, parasite);
if (gimp_parasite_has_flag (parasite, GIMP_PARASITE_ATTACH_PARENT))
{
parasite_shift_parent (parasite);
gimp_image_parasite_attach (drawable->gimage, parasite);
}
else if (gimp_parasite_has_flag (parasite, GIMP_PARASITE_ATTACH_GRANDPARENT))
{
parasite_shift_parent (parasite);
parasite_shift_parent (parasite);
gimp_parasite_attach (parasite);
}
if (gimp_parasite_is_undoable (parasite))
{
undo_push_group_end (drawable->gimage);
}
}
void
gimp_drawable_parasite_detach (GimpDrawable *drawable,
const gchar *parasite)
{
GimpParasite *p;
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
if (! (p = parasite_list_find (drawable->parasites, parasite)))
return;
if (gimp_parasite_is_undoable (p))
undo_push_drawable_parasite_remove (drawable->gimage, drawable,
gimp_parasite_name (p));
else if (gimp_parasite_is_persistent (p))
undo_push_cantundo (drawable->gimage, _("detach parasite from drawable"));
parasite_list_remove (drawable->parasites, parasite);
}
Tattoo
gimp_drawable_get_tattoo (const GimpDrawable *drawable)
{
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), 0);
return drawable->tattoo;
}
void
gimp_drawable_set_tattoo (GimpDrawable *drawable,
Tattoo val)
{
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
drawable->tattoo = val;
}
gboolean
gimp_drawable_is_rgb (const GimpDrawable *drawable)
{
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), FALSE);
if (gimp_drawable_type (drawable) == RGBA_GIMAGE ||
gimp_drawable_type (drawable) == RGB_GIMAGE)
return TRUE;
else
return FALSE;
}
gboolean
gimp_drawable_is_gray (const GimpDrawable *drawable)
{
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), FALSE);
if (gimp_drawable_type (drawable) == GRAYA_GIMAGE ||
gimp_drawable_type (drawable) == GRAY_GIMAGE)
return TRUE;
else
return FALSE;
}
gboolean
gimp_drawable_is_indexed (const GimpDrawable *drawable)
{
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), FALSE);
if (gimp_drawable_type (drawable) == INDEXEDA_GIMAGE ||
gimp_drawable_type (drawable) == INDEXED_GIMAGE)
return TRUE;
else
return FALSE;
}
TileManager *
gimp_drawable_data (const GimpDrawable *drawable)
{
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), NULL);
return drawable->tiles;
}
TileManager *
gimp_drawable_shadow (GimpDrawable *drawable)
{
GimpImage *gimage;
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), NULL);
if (! (gimage = gimp_drawable_gimage (drawable)))
return NULL;
return gimp_image_shadow (gimage, drawable->width, drawable->height,
drawable->bytes);
}
int
gimp_drawable_bytes (const GimpDrawable *drawable)
{
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), -1);
return drawable->bytes;
}
gint
gimp_drawable_width (const GimpDrawable *drawable)
{
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), -1);
return drawable->width;
}
gint
gimp_drawable_height (const GimpDrawable *drawable)
{
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), -1);
return drawable->height;
}
void
gimp_drawable_offsets (const GimpDrawable *drawable,
gint *off_x,
gint *off_y)
{
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
*off_x = drawable->offset_x;
*off_y = drawable->offset_y;
}
guchar *
gimp_drawable_cmap (const GimpDrawable *drawable)
{
GimpImage *gimage;
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), NULL);
if (! (gimage = gimp_drawable_gimage (drawable)))
return NULL;
return gimage->cmap;
}
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