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gimp/plug-ins/common/exchange.c

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/*
* This is a plug-in for the GIMP.
*
* 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.
*
*
*/
/*
* Exchange one color with the other (settable threshold to convert from
* one color-shade to another...might do wonders on certain images, or be
* totally useless on others).
*
* Author: robert@experimental.net
*
* Added ability to select "from" color by clicking on the preview image.
* As a side effect, clicking twice on the same spot reverses the action,
* i.e. you can click once, see the result, and click again to revert.
*
* Also changed update policies for all sliders to delayed. On a slow machine
* the algorithm really chewes up CPU time.
*
* - timecop@japan.co.jp
*/
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#ifdef __GNUC__
#warning GTK_DISABLE_DEPRECATED
#endif
#undef GTK_DISABLE_DEPRECATED
#include <gtk/gtk.h>
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include "libgimp/stdplugins-intl.h"
#define SCALE_WIDTH 128
#define PREVIEW_SIZE 128
/* datastructure to store parameters in */
typedef struct
{
GimpRGB from;
GimpRGB to;
GimpRGB threshold;
gint32 image;
gint32 drawable;
} myParams;
/* lets prototype */
static void query (void);
static void run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals);
static void exchange (void);
static void real_exchange (gint, gint, gint, gint, gboolean);
static int exchange_dialog (void);
static void update_preview (void);
static void color_button_callback (GtkWidget *, gpointer);
static void scale_callback (GtkAdjustment *, gpointer);
/* some global variables */
static GimpDrawable *drw;
static gboolean has_alpha;
static myParams xargs = { { 0.0, 0.0, 0.0, 1.0 },
{ 0.0, 0.0, 0.0, 1.0 },
{ 0.0, 0.0, 0.0, 1.0 },
0, 0 };
static GimpPixelRgn origregion;
static GtkWidget *preview;
static GtkWidget *from_colorbutton;
static gint sel_x1, sel_y1, sel_x2, sel_y2;
static gint prev_width, prev_height, sel_width, sel_height;
static gboolean lock_threshold = FALSE;
/* lets declare what we want to do */
GimpPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run, /* run_proc */
};
/* run program */
MAIN ()
/* tell GIMP who we are */
static void
query (void)
{
static GimpParamDef args[] =
{
{ GIMP_PDB_INT32, "run_mode", "Interactive" },
{ GIMP_PDB_IMAGE, "image", "Input image" },
{ GIMP_PDB_DRAWABLE, "drawable", "Input drawable" },
{ GIMP_PDB_INT8, "fromred", "Red value (from)" },
{ GIMP_PDB_INT8, "fromgreen", "Green value (from)" },
{ GIMP_PDB_INT8, "fromblue", "Blue value (from)" },
{ GIMP_PDB_INT8, "tored", "Red value (to)" },
{ GIMP_PDB_INT8, "togreen", "Green value (to)" },
{ GIMP_PDB_INT8, "toblue", "Blue value (to)" },
{ GIMP_PDB_INT8, "red_threshold", "Red threshold" },
{ GIMP_PDB_INT8, "green_threshold", "Green threshold" },
{ GIMP_PDB_INT8, "blue_threshold", "Blue threshold" }
};
gimp_install_procedure ("plug_in_exchange",
"Color Exchange",
"Exchange one color with another, optionally setting a threshold "
"to convert from one shade to another",
"robert@experimental.net",
"robert@experimental.net",
"June 17th, 1997",
N_("<Image>/Filters/Colors/Map/_Color Exchange..."),
"RGB*",
GIMP_PLUGIN,
G_N_ELEMENTS (args), 0,
args, NULL);
}
/* main function */
static void
run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals)
{
static GimpParam values[1];
GimpRunMode runmode;
GimpPDBStatusType status = GIMP_PDB_SUCCESS;
*nreturn_vals = 1;
*return_vals = values;
INIT_I18N ();
values[0].type = GIMP_PDB_STATUS;
values[0].data.d_status = status;
runmode = param[0].data.d_int32;
xargs.image = param[1].data.d_image;
xargs.drawable = param[2].data.d_drawable;
drw = gimp_drawable_get (xargs.drawable);
/* initialize misc. things */
gimp_drawable_mask_bounds (drw->drawable_id,
&sel_x1, &sel_y1, &sel_x2, &sel_y2);
sel_width = sel_x2 - sel_x1;
sel_height = sel_y2 - sel_y1;
if (sel_width > PREVIEW_SIZE)
prev_width = PREVIEW_SIZE;
else
prev_width = sel_width;
if (sel_height > PREVIEW_SIZE)
prev_height = PREVIEW_SIZE;
else
prev_height = sel_height;
has_alpha = gimp_drawable_has_alpha (drw->drawable_id);
switch (runmode)
{
case GIMP_RUN_INTERACTIVE:
/* retrieve stored arguments (if any) */
gimp_get_data ("plug_in_exchange", &xargs);
/* initialize using foreground color */
gimp_palette_get_foreground (&xargs.from);
if (! exchange_dialog ())
return;
break;
case GIMP_RUN_WITH_LAST_VALS:
gimp_get_data ("plug_in_exchange", &xargs);
/*
* instead of recalling the last-set values,
* run with the current foreground as 'from'
* color, making ALT-F somewhat more useful.
*/
gimp_palette_get_foreground (&xargs.from);
break;
case GIMP_RUN_NONINTERACTIVE:
if (nparams != 12)
{
status = GIMP_PDB_EXECUTION_ERROR;
}
else
{
gimp_rgb_set_uchar (&xargs.from,
param[3].data.d_int8,
param[4].data.d_int8,
param[5].data.d_int8);
gimp_rgb_set_uchar (&xargs.to,
param[6].data.d_int8,
param[7].data.d_int8,
param[8].data.d_int8);
gimp_rgb_set_uchar (&xargs.threshold,
param[9].data.d_int8,
param[10].data.d_int8,
param[11].data.d_int8);
}
break;
default:
break;
}
if (status == GIMP_PDB_SUCCESS)
{
if (gimp_drawable_is_rgb (drw->drawable_id))
{
gimp_progress_init (_("Color Exchange..."));
gimp_tile_cache_ntiles (2 * (drw->width / gimp_tile_width () + 1));
exchange ();
gimp_drawable_detach( drw);
/* store our settings */
if (runmode == GIMP_RUN_INTERACTIVE)
gimp_set_data ("plug_in_exchange", &xargs, sizeof (myParams));
/* and flush */
if (runmode != GIMP_RUN_NONINTERACTIVE)
gimp_displays_flush ();
}
else
status = GIMP_PDB_EXECUTION_ERROR;
}
values[0].data.d_status = status;
}
/* do the exchanging */
static void
exchange (void)
{
/* do the real exchange */
real_exchange (-1, -1, -1, -1, FALSE);
}
static gboolean
preview_event_handler (GtkWidget *widget,
GdkEvent *event)
{
gint pos;
guchar *buf;
GimpRGB color;
buf = GTK_PREVIEW (widget)->buffer;
switch(event->type)
{
case GDK_BUTTON_PRESS:
pos = event->button.x * GTK_PREVIEW(widget)->bpp +
event->button.y * GTK_PREVIEW(widget)->rowstride;
gimp_rgb_set_uchar (&color, buf[pos], buf[pos + 1], buf[pos + 2]);
gimp_color_button_set_color (GIMP_COLOR_BUTTON (from_colorbutton), &color);
break;
default:
break;
}
return FALSE;
}
/* show our dialog */
static gint
exchange_dialog (void)
{
GtkWidget *dialog;
GtkWidget *mainbox;
GtkWidget *frame;
GtkWidget *abox;
GtkWidget *pframe;
GtkWidget *table;
GtkWidget *threshold;
GtkWidget *colorbutton;
GtkWidget *scale;
GtkObject *adj;
gint framenumber;
gboolean run;
gimp_ui_init ("exchange", TRUE);
/* load pixelregion */
gimp_pixel_rgn_init (&origregion, drw,
0, 0, PREVIEW_SIZE, PREVIEW_SIZE, FALSE, FALSE);
/* set up the dialog */
dialog = gimp_dialog_new (_("Color Exchange"), "exchange",
NULL, 0,
gimp_standard_help_func, "plug-in-exchange",
GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
GTK_STOCK_OK, GTK_RESPONSE_OK,
NULL);
/* do some boxes here */
mainbox = gtk_vbox_new (FALSE, 4);
gtk_container_set_border_width (GTK_CONTAINER (mainbox), 6);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dialog)->vbox), mainbox,
TRUE, TRUE, 0);
frame = gtk_frame_new (_("Preview: Click Inside to Pick \"From Color\""));
gtk_box_pack_start (GTK_BOX (mainbox), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
abox = gtk_alignment_new (0.5, 0.5, 0.0, 0.0);
gtk_container_add (GTK_CONTAINER (frame), abox);
gtk_widget_show (abox);
pframe = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (pframe), GTK_SHADOW_IN);
gtk_container_set_border_width (GTK_CONTAINER (pframe), 4);
gtk_container_add (GTK_CONTAINER (abox), pframe);
gtk_widget_show (pframe);
preview = gtk_preview_new (GTK_PREVIEW_COLOR);
gtk_preview_size (GTK_PREVIEW (preview), prev_width, prev_height);
gtk_container_add (GTK_CONTAINER (pframe), preview);
gtk_widget_set_events (GTK_WIDGET(preview),
GDK_BUTTON_PRESS_MASK | GDK_BUTTON1_MOTION_MASK);
gtk_widget_show (preview);
g_signal_connect (preview, "event",
G_CALLBACK (preview_event_handler),
NULL);
update_preview ();
/* a hidden color_button to handle the threshold more easily */
threshold = gimp_color_button_new (NULL, 1, 1,
&xargs.threshold,
GIMP_COLOR_AREA_FLAT);
g_signal_connect (threshold, "color_changed",
G_CALLBACK (gimp_color_button_get_color),
&xargs.threshold);
g_signal_connect (threshold, "color_changed",
G_CALLBACK (color_button_callback),
&xargs.threshold);
/* and our scales */
for (framenumber = 0; framenumber < 2; framenumber++)
{
frame = gtk_frame_new (framenumber ? _("To Color") : _("From Color"));
gtk_box_pack_start (GTK_BOX (mainbox), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
table = gtk_table_new (framenumber ? 3 : 9, 4, FALSE);
gtk_table_set_col_spacings (GTK_TABLE (table), 4);
gtk_table_set_row_spacings (GTK_TABLE (table), 2);
gtk_container_set_border_width (GTK_CONTAINER (table), 4);
gtk_container_add (GTK_CONTAINER (frame), table);
gtk_widget_show (table);
colorbutton = gimp_color_button_new (framenumber ?
_("Color Exchange: To Color") :
_("Color Exchange: From Color"),
SCALE_WIDTH / 2, 16,
framenumber ? &xargs.to : &xargs.from,
GIMP_COLOR_AREA_FLAT);
gimp_table_attach_aligned (GTK_TABLE (table), 0, 0,
NULL, 0.0, 0.0,
colorbutton, 1, TRUE);
g_signal_connect (colorbutton, "color_changed",
G_CALLBACK (gimp_color_button_get_color),
framenumber ? &xargs.to : &xargs.from);
g_signal_connect (colorbutton, "color_changed",
G_CALLBACK (color_button_callback),
framenumber ? &xargs.to : &xargs.from);
if (!framenumber)
from_colorbutton = colorbutton;
/* Red */
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 1,
_("_Red:"), SCALE_WIDTH, 0,
framenumber ? xargs.to.r : xargs.from.r,
0.0, 1.0, 0.01, 0.1, 3,
TRUE, 0, 0,
NULL, NULL);
g_object_set_data (G_OBJECT (adj), "colorbutton", colorbutton);
g_object_set_data (G_OBJECT (colorbutton), "red", adj);
g_signal_connect (adj, "value_changed",
G_CALLBACK (gimp_double_adjustment_update),
framenumber ? &xargs.to.r : &xargs.from.r);
g_signal_connect (adj, "value_changed",
G_CALLBACK (scale_callback),
framenumber ? &xargs.to : &xargs.from);
scale = GTK_WIDGET (GIMP_SCALE_ENTRY_SCALE (adj));
gtk_range_set_update_policy (GTK_RANGE (scale), GTK_UPDATE_DELAYED);
if (! framenumber)
{
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 2,
_("R_ed Threshold:"), SCALE_WIDTH, 0,
xargs.threshold.r,
0.0, 1.0, 0.01, 0.1, 3,
TRUE, 0, 0,
NULL, NULL);
g_object_set_data (G_OBJECT (adj), "colorbutton", threshold);
g_object_set_data (G_OBJECT (threshold), "red", adj);
g_signal_connect (adj, "value_changed",
G_CALLBACK (gimp_double_adjustment_update),
&xargs.threshold.r);
g_signal_connect (adj, "value_changed",
G_CALLBACK (scale_callback),
&xargs.threshold);
scale = GTK_WIDGET (GIMP_SCALE_ENTRY_SCALE (adj));
gtk_range_set_update_policy (GTK_RANGE (scale), GTK_UPDATE_DELAYED);
}
/* Green */
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 3,
_("_Green:"), SCALE_WIDTH, 0,
framenumber ? xargs.to.g : xargs.from.g,
0.0, 1.0, 0.01, 0.1, 3,
TRUE, 0, 0,
NULL, NULL);
g_object_set_data (G_OBJECT (adj), "colorbutton", colorbutton);
g_object_set_data (G_OBJECT (colorbutton), "green", adj);
g_signal_connect (adj, "value_changed",
G_CALLBACK (gimp_double_adjustment_update),
framenumber ? &xargs.to.g : &xargs.from.g);
g_signal_connect (adj, "value_changed",
G_CALLBACK (scale_callback),
framenumber ? &xargs.to : &xargs.from);
scale = GTK_WIDGET (GIMP_SCALE_ENTRY_SCALE (adj));
gtk_range_set_update_policy (GTK_RANGE (scale), GTK_UPDATE_DELAYED);
if (!framenumber)
{
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 4,
_("G_reen Threshold:"), SCALE_WIDTH, 0,
xargs.threshold.g,
0.0, 1.0, 0.01, 0.1, 3,
TRUE, 0, 0,
NULL, NULL);
g_object_set_data (G_OBJECT (adj), "colorbutton", threshold);
g_object_set_data (G_OBJECT (threshold), "green", adj);
g_signal_connect (adj, "value_changed",
G_CALLBACK (gimp_double_adjustment_update),
&xargs.threshold.g);
g_signal_connect (adj, "value_changed",
G_CALLBACK (scale_callback),
&xargs.threshold);
scale = GTK_WIDGET (GIMP_SCALE_ENTRY_SCALE (adj));
gtk_range_set_update_policy (GTK_RANGE (scale), GTK_UPDATE_DELAYED);
}
/* Blue */
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 5,
_("_Blue:"), SCALE_WIDTH, 0,
framenumber ? xargs.to.b : xargs.from.b,
0.0, 1.0, 0.01, 0.1, 3,
TRUE, 0, 0,
NULL, NULL);
g_object_set_data (G_OBJECT (adj), "colorbutton", colorbutton);
g_object_set_data (G_OBJECT (colorbutton), "blue", adj);
g_signal_connect (adj, "value_changed",
G_CALLBACK (gimp_double_adjustment_update),
framenumber ? &xargs.to.b : &xargs.from.b);
g_signal_connect (adj, "value_changed",
G_CALLBACK (scale_callback),
framenumber ? &xargs.to : &xargs.from);
scale = GTK_WIDGET (GIMP_SCALE_ENTRY_SCALE (adj));
gtk_range_set_update_policy (GTK_RANGE (scale), GTK_UPDATE_DELAYED);
if (! framenumber)
{
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 6,
_("B_lue Threshold:"), SCALE_WIDTH, 0,
xargs.threshold.b,
0.0, 1.0, 0.01, 0.1, 3,
TRUE, 0, 0,
NULL, NULL);
g_object_set_data (G_OBJECT (adj), "colorbutton", threshold);
g_object_set_data (G_OBJECT (threshold), "blue", adj);
g_signal_connect (adj, "value_changed",
G_CALLBACK (gimp_double_adjustment_update),
&xargs.threshold.b);
g_signal_connect (adj, "value_changed",
G_CALLBACK (scale_callback),
&xargs.threshold);
scale = GTK_WIDGET (GIMP_SCALE_ENTRY_SCALE (adj));
gtk_range_set_update_policy (GTK_RANGE (scale), GTK_UPDATE_DELAYED);
}
if (!framenumber)
{
GtkWidget *button;
button = gtk_check_button_new_with_mnemonic (_("Lock _Thresholds"));
gtk_table_attach (GTK_TABLE (table), button, 1, 3, 7, 8,
GTK_FILL, 0, 0, 0);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button),
lock_threshold);
gtk_widget_show (button);
g_signal_connect (button, "clicked",
G_CALLBACK (gimp_toggle_button_update),
&lock_threshold);
}
}
/* show everything */
gtk_widget_show (mainbox);
gtk_widget_show (dialog);
run = (gimp_dialog_run (GIMP_DIALOG (dialog)) == GTK_RESPONSE_OK);
gtk_widget_destroy (dialog);
return run;
}
static void
color_button_callback (GtkWidget *widget,
gpointer data)
{
GtkObject *red_adj;
GtkObject *green_adj;
GtkObject *blue_adj;
GimpRGB *color;
color = (GimpRGB *) data;
red_adj = (GtkObject *) g_object_get_data (G_OBJECT (widget), "red");
green_adj = (GtkObject *) g_object_get_data (G_OBJECT (widget), "green");
blue_adj = (GtkObject *) g_object_get_data (G_OBJECT (widget), "blue");
if (red_adj)
gtk_adjustment_set_value (GTK_ADJUSTMENT (red_adj), color->r);
if (green_adj)
gtk_adjustment_set_value (GTK_ADJUSTMENT (green_adj), color->g);
if (blue_adj)
gtk_adjustment_set_value (GTK_ADJUSTMENT (blue_adj), color->b);
update_preview ();
}
static void
scale_callback (GtkAdjustment *adj,
gpointer data)
{
GtkObject *object;
GimpRGB *color;
color = (GimpRGB *) data;
object = g_object_get_data (G_OBJECT (adj), "colorbutton");
if (GIMP_IS_COLOR_BUTTON (object))
{
if (color == &xargs.threshold && lock_threshold == TRUE)
gimp_rgb_set (color, adj->value, adj->value, adj->value);
gimp_color_button_set_color (GIMP_COLOR_BUTTON (object), color);
update_preview ();
}
}
static void
update_preview (void)
{
real_exchange (sel_x1, sel_y1,
sel_x1 + prev_width, sel_y1 + prev_height,
TRUE);
gtk_widget_queue_draw (preview);
gdk_flush ();
}
static void
real_exchange (gint x1,
gint y1,
gint x2,
gint y2,
gboolean do_preview)
{
GimpPixelRgn srcPR, destPR;
guchar min_red, min_green, min_blue;
guchar max_red, max_green, max_blue;
guchar from_red, from_green, from_blue;
guchar to_red, to_green, to_blue;
guchar *src_row, *dest_row;
guint x, y, bpp = drw->bpp;
guint width, height;
GimpRGB min;
GimpRGB max;
/* fill if necessary */
if (x1 == -1 || y1 == -1 || x2 == -1 || y2 == -1)
{
x1 = sel_x1;
y1 = sel_y1;
x2 = sel_x2;
y2 = sel_y2;
}
/* check for valid coordinates */
width = x2 - x1;
height = y2 - y1;
/* allocate memory */
src_row = g_new (guchar, drw->width * bpp);
gimp_rgb_get_uchar (&xargs.from, &from_red, &from_green, &from_blue);
gimp_rgb_get_uchar (&xargs.to, &to_red, &to_green, &to_blue);
/* get boundary values */
min = xargs.from;
gimp_rgb_subtract (&min, &xargs.threshold);
gimp_rgb_clamp (&min);
gimp_rgb_get_uchar (&min, &min_red, &min_green, &min_blue);
max = xargs.from;
gimp_rgb_add (&max, &xargs.threshold);
gimp_rgb_clamp (&max);
gimp_rgb_get_uchar (&max, &max_red, &max_green, &max_blue);
if (do_preview && has_alpha)
dest_row = g_new (guchar, drw->width * (bpp - 1));
else
dest_row = g_new (guchar, drw->width * bpp);
gimp_pixel_rgn_init (&srcPR, drw, x1, y1, width, height, FALSE, FALSE);
if (! do_preview)
gimp_pixel_rgn_init (&destPR, drw, x1, y1, width, height, TRUE, TRUE);
for (y = y1; y < y2; y++)
{
gimp_pixel_rgn_get_row (&srcPR, src_row, x1, y, width);
for (x = 0; x < width; x++)
{
guchar pixel_red, pixel_green, pixel_blue;
guchar new_red, new_green, new_blue;
guint idx;
/* get current pixel-values */
pixel_red = src_row[x * bpp];
pixel_green = src_row[x * bpp + 1];
pixel_blue = src_row[x * bpp + 2];
/* shift down for preview */
if (do_preview && has_alpha)
idx = x * (bpp - 1);
else
idx = x * bpp;
/* want this pixel? */
if (pixel_red >= min_red &&
pixel_red <= max_red &&
pixel_green >= min_green &&
pixel_green <= max_green &&
pixel_blue >= min_blue &&
pixel_blue <= max_blue)
{
guchar red_delta, green_delta, blue_delta;
red_delta = pixel_red > from_red ?
pixel_red - from_red : from_red - pixel_red;
green_delta = pixel_green > from_green ?
pixel_green - from_green : from_green - pixel_green;
blue_delta = pixel_blue > from_blue ?
pixel_blue - from_blue : from_blue - pixel_blue;
new_red = CLAMP (to_red + red_delta, 0, 255);
new_green = CLAMP (to_green + green_delta, 0, 255);
new_blue = CLAMP (to_blue + blue_delta, 0, 255);
}
else
{
new_red = pixel_red;
new_green = pixel_green;
new_blue = pixel_blue;
}
/* fill buffer */
dest_row[idx + 0] = new_red;
dest_row[idx + 1] = new_green;
dest_row[idx + 2] = new_blue;
/* copy alpha-channel */
if (!do_preview && has_alpha)
dest_row[idx + 3] = src_row[x * bpp + 3];
}
/* store the dest */
if (do_preview)
gtk_preview_draw_row (GTK_PREVIEW (preview), dest_row, 0, y - y1, width);
else
gimp_pixel_rgn_set_row (&destPR, dest_row, x1, y, width);
/* and tell the user what we're doing */
if (! do_preview && (y % 10) == 0)
gimp_progress_update ((gdouble) y / (gdouble) height);
}
g_free(src_row);
g_free(dest_row);
if (! do_preview)
{
/* update the processed region */
gimp_drawable_flush (drw);
gimp_drawable_merge_shadow (drw->drawable_id, TRUE);
gimp_drawable_update (drw->drawable_id, x1, y1, width, height);
}
}
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