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gimp/app/core/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 <glib-object.h>
#include "libgimpcolor/gimpcolor.h"
#include "libgimpmath/gimpmath.h"
#include "libgimpbase/gimpbase.h"
#include "core-types.h"
#include "base/pixel-region.h"
#include "base/tile.h"
#include "base/tile-manager.h"
#include "paint-funcs/paint-funcs.h"
#include "gimp.h"
#include "gimpchannel.h"
#include "gimpcontext.h"
#include "gimpdrawable.h"
#include "gimpdrawable-preview.h"
#include "gimpimage.h"
#include "gimpimage-mask.h"
#include "gimpimage-undo-push.h"
#include "gimplayer.h"
#include "gimplist.h"
#include "gimpmarshal.h"
#include "gimpparasitelist.h"
#include "gimppreviewcache.h"
#include "gimp-intl.h"
enum
{
VISIBILITY_CHANGED,
LAST_SIGNAL
};
/* local function prototypes */
static void gimp_drawable_class_init (GimpDrawableClass *klass);
static void gimp_drawable_init (GimpDrawable *drawable);
static void gimp_drawable_finalize (GObject *object);
static gsize gimp_drawable_get_memsize (GimpObject *object);
static void gimp_drawable_invalidate_preview (GimpViewable *viewable);
static GimpItem * gimp_drawable_duplicate (GimpItem *item,
GType new_type,
gboolean add_alpha);
static void gimp_drawable_scale (GimpItem *item,
gint new_width,
gint new_height,
gint new_offset_x,
gint new_offset_y,
GimpInterpolationType interp_type);
static void gimp_drawable_resize (GimpItem *item,
gint new_width,
gint new_height,
gint offset_x,
gint offset_y);
/* private variables */
static guint gimp_drawable_signals[LAST_SIGNAL] = { 0 };
static GimpItemClass *parent_class = NULL;
GType
gimp_drawable_get_type (void)
{
static GType drawable_type = 0;
if (! drawable_type)
{
static const GTypeInfo drawable_info =
{
sizeof (GimpDrawableClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gimp_drawable_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GimpDrawable),
0, /* n_preallocs */
(GInstanceInitFunc) gimp_drawable_init,
};
drawable_type = g_type_register_static (GIMP_TYPE_ITEM,
"GimpDrawable",
&drawable_info, 0);
}
return drawable_type;
}
static void
gimp_drawable_class_init (GimpDrawableClass *klass)
{
GObjectClass *object_class;
GimpObjectClass *gimp_object_class;
GimpViewableClass *viewable_class;
GimpItemClass *item_class;
object_class = G_OBJECT_CLASS (klass);
gimp_object_class = GIMP_OBJECT_CLASS (klass);
viewable_class = GIMP_VIEWABLE_CLASS (klass);
item_class = GIMP_ITEM_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
gimp_drawable_signals[VISIBILITY_CHANGED] =
g_signal_new ("visibility_changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpDrawableClass, visibility_changed),
NULL, NULL,
gimp_marshal_VOID__VOID,
G_TYPE_NONE, 0);
object_class->finalize = gimp_drawable_finalize;
gimp_object_class->get_memsize = gimp_drawable_get_memsize;
viewable_class->invalidate_preview = gimp_drawable_invalidate_preview;
viewable_class->get_preview_size = gimp_drawable_get_preview_size;
viewable_class->get_popup_size = gimp_drawable_get_popup_size;
viewable_class->get_preview = gimp_drawable_get_preview;
item_class->duplicate = gimp_drawable_duplicate;
item_class->scale = gimp_drawable_scale;
item_class->resize = gimp_drawable_resize;
klass->visibility_changed = NULL;
}
static void
gimp_drawable_init (GimpDrawable *drawable)
{
drawable->tiles = NULL;
drawable->visible = FALSE;
drawable->bytes = 0;
drawable->type = -1;
drawable->has_alpha = FALSE;
drawable->preview_cache = NULL;
drawable->preview_valid = FALSE;
}
static void
gimp_drawable_finalize (GObject *object)
{
GimpDrawable *drawable;
g_return_if_fail (GIMP_IS_DRAWABLE (object));
drawable = GIMP_DRAWABLE (object);
if (drawable->tiles)
{
tile_manager_destroy (drawable->tiles);
drawable->tiles = NULL;
}
if (drawable->preview_cache)
gimp_preview_cache_invalidate (&drawable->preview_cache);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gsize
gimp_drawable_get_memsize (GimpObject *object)
{
GimpDrawable *drawable;
gsize memsize = 0;
drawable = GIMP_DRAWABLE (object);
if (drawable->tiles)
memsize += tile_manager_get_memsize (drawable->tiles);
if (drawable->preview_cache)
memsize += gimp_preview_cache_get_memsize (drawable->preview_cache);
return memsize + GIMP_OBJECT_CLASS (parent_class)->get_memsize (object);
}
static void
gimp_drawable_invalidate_preview (GimpViewable *viewable)
{
GimpDrawable *drawable;
GimpImage *gimage;
if (GIMP_VIEWABLE_CLASS (parent_class)->invalidate_preview)
GIMP_VIEWABLE_CLASS (parent_class)->invalidate_preview (viewable);
drawable = GIMP_DRAWABLE (viewable);
drawable->preview_valid = FALSE;
if (drawable->preview_cache)
gimp_preview_cache_invalidate (&drawable->preview_cache);
gimage = gimp_item_get_image (GIMP_ITEM (drawable));
if (gimage)
gimp_viewable_invalidate_preview (GIMP_VIEWABLE (gimage));
}
static GimpItem *
gimp_drawable_duplicate (GimpItem *item,
GType new_type,
gboolean add_alpha)
{
GimpDrawable *drawable;
GimpItem *new_item;
GimpDrawable *new_drawable;
GimpImageType new_image_type;
PixelRegion srcPR;
PixelRegion destPR;
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,
add_alpha);
if (! GIMP_IS_DRAWABLE (new_item))
return new_item;
drawable = GIMP_DRAWABLE (item);
new_drawable = GIMP_DRAWABLE (new_item);
if (add_alpha)
new_image_type = gimp_drawable_type_with_alpha (drawable);
else
new_image_type = gimp_drawable_type (drawable);
gimp_drawable_configure (new_drawable,
gimp_item_get_image (GIMP_ITEM (drawable)),
item->offset_x,
item->offset_y,
item->width,
item->height,
new_image_type,
GIMP_OBJECT (new_drawable)->name);
new_drawable->visible = drawable->visible;
pixel_region_init (&srcPR, drawable->tiles,
0, 0,
item->width,
item->height,
FALSE);
pixel_region_init (&destPR, new_drawable->tiles,
0, 0,
new_item->width,
new_item->height,
TRUE);
if (new_image_type == drawable->type)
copy_region (&srcPR, &destPR);
else
add_alpha_region (&srcPR, &destPR);
return new_item;
}
static void
gimp_drawable_scale (GimpItem *item,
gint new_width,
gint new_height,
gint new_offset_x,
gint new_offset_y,
GimpInterpolationType interpolation_type)
{
GimpDrawable *drawable;
PixelRegion srcPR, destPR;
TileManager *new_tiles;
drawable = GIMP_DRAWABLE (item);
/* Update the old position */
gimp_drawable_update (drawable, 0, 0, item->width, item->height);
/* Allocate the new channel */
new_tiles = tile_manager_new (new_width, new_height, drawable->bytes);
/* Configure the pixel regions */
pixel_region_init (&srcPR, drawable->tiles,
0, 0,
item->width,
item->height,
FALSE);
pixel_region_init (&destPR, new_tiles,
0, 0,
new_width, new_height,
TRUE);
/* Scale the drawable -
* If the drawable is indexed, then we don't use pixel-value
* resampling because that doesn't necessarily make sense for indexed
* images.
*/
if (gimp_drawable_is_indexed (drawable))
interpolation_type = GIMP_INTERPOLATION_NONE;
scale_region (&srcPR, &destPR, interpolation_type);
/* Configure the new channel */
drawable->tiles = new_tiles;
item->width = new_width;
item->height = new_height;
item->offset_x = new_offset_x;
item->offset_y = new_offset_y;
/* Update the new position */
gimp_drawable_update (drawable, 0, 0, item->width, item->height);
gimp_viewable_size_changed (GIMP_VIEWABLE (drawable));
}
static void
gimp_drawable_resize (GimpItem *item,
gint new_width,
gint new_height,
gint offset_x,
gint offset_y)
{
GimpDrawable *drawable;
PixelRegion srcPR, destPR;
TileManager *new_tiles;
gint w, h;
gint x1, y1, x2, y2;
drawable = GIMP_DRAWABLE (item);
x1 = CLAMP (offset_x, 0, new_width);
y1 = CLAMP (offset_y, 0, new_height);
x2 = CLAMP (offset_x + item->width, 0, new_width);
y2 = CLAMP (offset_y + item->height, 0, new_height);
w = x2 - x1;
h = y2 - y1;
if (offset_x > 0)
{
x1 = 0;
x2 = offset_x;
}
else
{
x1 = -offset_x;
x2 = 0;
}
if (offset_y > 0)
{
y1 = 0;
y2 = offset_y;
}
else
{
y1 = -offset_y;
y2 = 0;
}
/* Update the old position */
gimp_drawable_update (drawable, 0, 0, item->width, item->height);
/* Configure the pixel regions */
pixel_region_init (&srcPR, drawable->tiles,
x1, y1,
w, h,
FALSE);
/* Allocate the new tile manager, configure dest region */
new_tiles = tile_manager_new (new_width, new_height,
drawable->bytes);
/* Determine whether the new tiles need to be initially cleared */
if ((new_width > item->width) ||
(new_height > item->height) ||
(x2 || y2))
{
pixel_region_init (&destPR, new_tiles,
0, 0,
new_width, new_height,
TRUE);
/* fill with the fill color */
if (gimp_drawable_has_alpha (drawable) ||
GIMP_IS_CHANNEL (drawable) /* EEK */)
{
/* Set to transparent and black */
guchar bg[4] = { 0, 0, 0, 0 };
color_region (&destPR, bg);
}
else
{
guchar bg[3];
gimp_image_get_background (gimp_item_get_image (item),
drawable, bg);
color_region (&destPR, bg);
}
}
/* copy from the old to the new */
if (w && h)
{
pixel_region_init (&destPR, new_tiles,
x2, y2,
w, h,
TRUE);
copy_region (&srcPR, &destPR);
}
/* Configure the new drawable */
drawable->tiles = new_tiles;
item->offset_x = x1 + item->offset_x - x2;
item->offset_y = y1 + item->offset_y - y2;
item->width = new_width;
item->height = new_height;
/* update the new area */
gimp_drawable_update (drawable, 0, 0, item->width, item->height);
gimp_viewable_size_changed (GIMP_VIEWABLE (drawable));
}
void
gimp_drawable_configure (GimpDrawable *drawable,
GimpImage *gimage,
gint offset_x,
gint offset_y,
gint width,
gint height,
GimpImageType type,
const gchar *name)
{
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
g_return_if_fail (GIMP_IS_IMAGE (gimage));
gimp_item_configure (GIMP_ITEM (drawable), gimage,
offset_x, offset_y, width, height, name);
drawable->type = type;
drawable->bytes = GIMP_IMAGE_TYPE_BYTES (type);
drawable->has_alpha = GIMP_IMAGE_TYPE_HAS_ALPHA (type);
if (drawable->tiles)
tile_manager_destroy (drawable->tiles);
drawable->tiles = tile_manager_new (width, height,
drawable->bytes);
drawable->visible = TRUE;
/* preview variables */
drawable->preview_cache = NULL;
drawable->preview_valid = FALSE;
}
void
gimp_drawable_update (GimpDrawable *drawable,
gint x,
gint y,
gint w,
gint h)
{
GimpItem *item;
GimpImage *gimage;
gint offset_x;
gint offset_y;
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
item = GIMP_ITEM (drawable);
gimage = gimp_item_get_image (item);
g_return_if_fail (gimage != NULL);
gimp_item_offsets (item, &offset_x, &offset_y);
x += offset_x;
y += offset_y;
gimp_image_update (gimage, x, y, w, h);
gimp_viewable_invalidate_preview (GIMP_VIEWABLE (drawable));
}
void
gimp_drawable_push_undo (GimpDrawable *drawable,
const gchar *undo_desc,
gint x1,
gint y1,
gint x2,
gint y2,
TileManager *tiles,
gboolean sparse)
{
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
if (! tiles)
gimp_image_undo_push_image (gimp_item_get_image (GIMP_ITEM (drawable)),
undo_desc,
drawable,
x1, y1, x2, y2);
else
gimp_image_undo_push_image_mod (gimp_item_get_image (GIMP_ITEM (drawable)),
undo_desc,
drawable,
x1, y1, x2, y2,
tiles, sparse);
}
void
gimp_drawable_merge_shadow (GimpDrawable *drawable,
gboolean push_undo,
const gchar *undo_desc)
{
GimpImage *gimage;
PixelRegion shadowPR;
gint x1, y1, x2, y2;
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
gimage = gimp_item_get_image (GIMP_ITEM (drawable));
g_return_if_fail (GIMP_IS_IMAGE (gimage));
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,
push_undo, undo_desc,
GIMP_OPACITY_OPAQUE, GIMP_REPLACE_MODE,
NULL, x1, y1);
}
void
gimp_drawable_fill (GimpDrawable *drawable,
const GimpRGB *color)
{
GimpItem *item;
GimpImage *gimage;
PixelRegion destPR;
guchar c[MAX_CHANNELS];
guchar i;
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
item = GIMP_ITEM (drawable);
gimage = gimp_item_get_image (item);
g_return_if_fail (gimage != NULL);
switch (GIMP_IMAGE_TYPE_BASE_TYPE (gimp_drawable_type (drawable)))
{
case GIMP_RGB:
gimp_rgba_get_uchar (color,
&c[RED_PIX],
&c[GREEN_PIX],
&c[BLUE_PIX],
&c[ALPHA_PIX]);
if (gimp_drawable_type (drawable) != GIMP_RGBA_IMAGE)
c[ALPHA_PIX] = 255;
break;
case GIMP_GRAY:
gimp_rgba_get_uchar (color,
&c[GRAY_PIX],
NULL,
NULL,
&c[ALPHA_G_PIX]);
if (gimp_drawable_type (drawable) != GIMP_GRAYA_IMAGE)
c[ALPHA_G_PIX] = 255;
break;
case GIMP_INDEXED:
gimp_rgb_get_uchar (color,
&c[RED_PIX],
&c[GREEN_PIX],
&c[BLUE_PIX]);
gimp_image_transform_color (gimage, drawable, c, &i, GIMP_RGB);
c[INDEXED_PIX] = i;
if (gimp_drawable_type (drawable) == GIMP_INDEXEDA_IMAGE)
gimp_rgba_get_uchar (color,
NULL,
NULL,
NULL,
&c[ALPHA_I_PIX]);
break;
default:
g_warning ("%s: Cannot fill unknown image type.",
G_GNUC_PRETTY_FUNCTION);
break;
}
pixel_region_init (&destPR,
gimp_drawable_data (drawable),
0, 0,
gimp_item_width (item),
gimp_item_height (item),
TRUE);
color_region (&destPR, c);
gimp_drawable_update (drawable,
0, 0,
gimp_item_width (item),
gimp_item_height (item));
}
void
gimp_drawable_fill_by_type (GimpDrawable *drawable,
GimpContext *context,
GimpFillType fill_type)
{
GimpRGB color;
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
color.a = GIMP_OPACITY_OPAQUE;
switch (fill_type)
{
case GIMP_FOREGROUND_FILL:
gimp_context_get_foreground (context, &color);
break;
case GIMP_BACKGROUND_FILL:
gimp_context_get_background (context, &color);
break;
case GIMP_WHITE_FILL:
gimp_rgb_set (&color, 1.0, 1.0, 1.0);
break;
case GIMP_TRANSPARENT_FILL:
gimp_rgba_set (&color, 0.0, 0.0, 0.0, GIMP_OPACITY_TRANSPARENT);
break;
case GIMP_NO_FILL:
return;
default:
g_warning ("%s: unknown fill type %d", G_GNUC_PRETTY_FUNCTION, fill_type);
return;
}
gimp_drawable_fill (drawable, &color);
}
gboolean
gimp_drawable_mask_bounds (GimpDrawable *drawable,
gint *x1,
gint *y1,
gint *x2,
gint *y2)
{
GimpItem *item;
GimpImage *gimage;
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), FALSE);
item = GIMP_ITEM (drawable);
gimage = gimp_item_get_image (item);
g_return_val_if_fail (gimage != NULL, FALSE);
if (gimp_image_mask_bounds (gimage, x1, y1, x2, y2))
{
gint off_x, off_y;
gimp_item_offsets (item, &off_x, &off_y);
*x1 = CLAMP (*x1 - off_x, 0, gimp_item_width (item));
*y1 = CLAMP (*y1 - off_y, 0, gimp_item_height (item));
*x2 = CLAMP (*x2 - off_x, 0, gimp_item_width (item));
*y2 = CLAMP (*y2 - off_y, 0, gimp_item_height (item));
return TRUE;
}
else
{
*x2 = gimp_item_width (item);
*y2 = gimp_item_height (item);
return FALSE;
}
}
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)
{
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), -1);
return GIMP_IMAGE_TYPE_WITH_ALPHA (gimp_drawable_type (drawable));
}
gboolean
gimp_drawable_is_rgb (const GimpDrawable *drawable)
{
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), FALSE);
return GIMP_IMAGE_TYPE_IS_RGB (gimp_drawable_type (drawable));
}
gboolean
gimp_drawable_is_gray (const GimpDrawable *drawable)
{
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), FALSE);
return GIMP_IMAGE_TYPE_IS_GRAY (gimp_drawable_type (drawable));
}
gboolean
gimp_drawable_is_indexed (const GimpDrawable *drawable)
{
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), FALSE);
return GIMP_IMAGE_TYPE_IS_INDEXED (gimp_drawable_type (drawable));
}
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)
{
GimpItem *item;
GimpImage *gimage;
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), NULL);
item = GIMP_ITEM (drawable);
if (! (gimage = gimp_item_get_image (item)))
return NULL;
return gimp_image_shadow (gimage, item->width, item->height,
drawable->bytes);
}
gint
gimp_drawable_bytes (const GimpDrawable *drawable)
{
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), -1);
return drawable->bytes;
}
gint
gimp_drawable_bytes_with_alpha (const GimpDrawable *drawable)
{
GimpImageType type;
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), -1);
type = GIMP_IMAGE_TYPE_WITH_ALPHA (gimp_drawable_type (drawable));
return GIMP_IMAGE_TYPE_BYTES (type);
}
gboolean
gimp_drawable_get_visible (const GimpDrawable *drawable)
{
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), FALSE);
return drawable->visible;
}
void
gimp_drawable_set_visible (GimpDrawable *drawable,
gboolean visible,
gboolean push_undo)
{
g_return_if_fail (GIMP_IS_DRAWABLE (drawable));
if (drawable->visible != visible)
{
GimpItem *item = GIMP_ITEM (drawable);
if (push_undo)
{
GimpImage *gimage = gimp_item_get_image (item);
if (gimage)
gimp_image_undo_push_drawable_visibility (gimage, NULL, drawable);
}
drawable->visible = visible ? TRUE : FALSE;
g_signal_emit (drawable, gimp_drawable_signals[VISIBILITY_CHANGED], 0);
gimp_drawable_update (drawable, 0, 0, item->width, item->height);
}
}
guchar *
gimp_drawable_cmap (const GimpDrawable *drawable)
{
GimpImage *gimage;
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), NULL);
if (! (gimage = gimp_item_get_image (GIMP_ITEM (drawable))))
return NULL;
return gimage->cmap;
}
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_item_get_image (GIMP_ITEM (drawable)) ||
! gimp_drawable_is_indexed (drawable), NULL);
/* do not make this a g_return_if_fail() */
if (! (x >= 0 && x < GIMP_ITEM (drawable)->width &&
y >= 0 && y < GIMP_ITEM (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_item_get_image (GIMP_ITEM (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;
}
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