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gimp/plug-ins/common/borderaverage.c

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/* borderaverage 0.01 - image processing plug-in for the Gimp 1.0 API
*
* Copyright (C) 1998 Philipp Klaus (webmaster@access.ch)
*
*
* 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 <gtk/gtk.h>
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include "libgimp/stdplugins-intl.h"
/* Declare local functions.
*/
static void query (void);
static void run (gchar *name,
gint nparams,
GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals);
static void borderaverage (GimpDrawable *drawable,
GimpRGB *result);
static gint borderaverage_dialog (void);
static void add_new_color (gint bytes,
guchar *buffer,
gint *cube,
gint bucket_expo);
GimpPlugInInfo PLUG_IN_INFO =
{
NULL, /* init */
NULL, /* quit */
query, /* query */
run, /* run */
};
static gint borderaverage_thickness = 3;
static gint borderaverage_bucket_exponent = 4;
struct borderaverage_data
{
gint thickness;
gint bucket_exponent;
}
borderaverage_data =
{
3,
4
};
MAIN ()
static void
query (void)
{
static GimpParamDef args[] =
{
{ GIMP_PDB_INT32, "run_mode", "Interactive, non-interactive" },
{ GIMP_PDB_IMAGE, "image", "Input image (unused)" },
{ GIMP_PDB_DRAWABLE, "drawable", "Input drawable" },
{ GIMP_PDB_INT32, "thickness", "Border size to take in count" },
{ GIMP_PDB_INT32, "bucket_exponent", "Bits for bucket size (default=4: 16 Levels)" },
};
static GimpParamDef return_vals[] =
{
{ GIMP_PDB_COLOR, "borderaverage", "The average color of the specified border" },
};
INIT_I18N();
gimp_install_procedure ("plug_in_borderaverage",
"Borderaverage",
"",
"Philipp Klaus",
"Internet Access AG",
"1998",
N_("<Image>/Filters/Colors/Border Average..."),
"RGB*",
GIMP_PLUGIN,
G_N_ELEMENTS (args),
G_N_ELEMENTS (return_vals),
args, return_vals);
}
static void
run (gchar *name,
gint nparams,
GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals)
{
static GimpParam values[3];
GimpDrawable *drawable;
GimpRunMode run_mode;
GimpPDBStatusType status = GIMP_PDB_SUCCESS;
GimpRGB result_color;
INIT_I18N_UI();
run_mode = param[0].data.d_int32;
/* Get the specified drawable */
drawable = gimp_drawable_get (param[2].data.d_drawable);
switch (run_mode)
{
case GIMP_RUN_INTERACTIVE:
gimp_get_data ("plug_in_borderaverage", &borderaverage_data);
borderaverage_thickness = borderaverage_data.thickness;
borderaverage_bucket_exponent = borderaverage_data.bucket_exponent;
if (! borderaverage_dialog ())
status = GIMP_PDB_EXECUTION_ERROR;
break;
case GIMP_RUN_NONINTERACTIVE:
if (nparams != 5)
status = GIMP_PDB_CALLING_ERROR;
if (status == GIMP_PDB_SUCCESS)
{
borderaverage_thickness = param[3].data.d_int32;
borderaverage_bucket_exponent = param[4].data.d_int32;
}
break;
case GIMP_RUN_WITH_LAST_VALS:
gimp_get_data ("plug_in_borderaverage", &borderaverage_data);
borderaverage_thickness = borderaverage_data.thickness;
borderaverage_bucket_exponent = borderaverage_data.bucket_exponent;
break;
default:
break;
}
if (status == GIMP_PDB_SUCCESS)
{
/* Make sure that the drawable is RGB color */
if (gimp_drawable_is_rgb (drawable->drawable_id))
{
gimp_progress_init ( _("Border Average..."));
borderaverage (drawable, &result_color);
if (run_mode != GIMP_RUN_NONINTERACTIVE)
{
gimp_palette_set_foreground (&result_color);
}
if (run_mode == GIMP_RUN_INTERACTIVE)
{
borderaverage_data.thickness = borderaverage_thickness;
borderaverage_data.bucket_exponent = borderaverage_bucket_exponent;
gimp_set_data ("plug_in_borderaverage",
&borderaverage_data, sizeof (borderaverage_data));
}
}
else
{
status = GIMP_PDB_EXECUTION_ERROR;
}
}
*nreturn_vals = 3;
*return_vals = values;
values[0].type = GIMP_PDB_STATUS;
values[0].data.d_status = status;
values[1].type = GIMP_PDB_COLOR;
values[1].data.d_color = result_color;
gimp_drawable_detach (drawable);
}
static void
borderaverage (GimpDrawable *drawable,
GimpRGB *result)
{
gint width;
gint height;
gint x1, x2, y1, y2;
gint bytes;
gint max;
guchar r, g, b;
guchar *buffer;
gint bucket_num, bucket_expo, bucket_rexpo;
gint *cube;
gint row, col;
gint i, j, k; /* index variables */
GimpPixelRgn myPR;
/* allocate and clear the cube before */
bucket_expo = borderaverage_bucket_exponent;
bucket_rexpo = 8 - bucket_expo;
cube = g_new (gint, 1 << (bucket_rexpo * 3));
bucket_num = 1 << bucket_rexpo;
for (i = 0; i < bucket_num; i++)
{
for (j = 0; j < bucket_num; j++)
{
for (k = 0; k < bucket_num; k++)
{
cube[(i << (bucket_rexpo << 1)) + (j << bucket_rexpo) + k] = 0;
}
}
}
/* Get the input area. This is the bounding box of the selection in
* the image (or the entire image if there is no selection). Only
* operating on the input area is simply an optimization. It doesn't
* need to be done for correct operation. (It simply makes it go
* faster, since fewer pixels need to be operated on).
*/
gimp_drawable_mask_bounds (drawable->drawable_id, &x1, &y1, &x2, &y2);
/* Get the size of the input image. (This will/must be the same
* as the size of the output image.
*/
width = drawable->width;
height = drawable->height;
bytes = drawable->bpp;
gimp_tile_cache_ntiles (2 * ((x2 - x1) / gimp_tile_width () + 1));
/* allocate row buffer */
buffer = g_new (guchar, (x2 - x1) * bytes);
/* initialize the pixel regions */
gimp_pixel_rgn_init (&myPR, drawable, 0, 0, width, height, FALSE, FALSE);
/* loop through the rows, performing our magic*/
for (row = y1; row < y2; row++)
{
gimp_pixel_rgn_get_row (&myPR, buffer, x1, row, (x2-x1));
if (row < y1 + borderaverage_thickness ||
row >= y2 - borderaverage_thickness)
{
/* add the whole row */
for (col = 0; col < ((x2 - x1) * bytes); col += bytes)
{
add_new_color (bytes, &buffer[col], cube, bucket_expo);
}
}
else
{
/* add the left border */
for (col = 0; col < (borderaverage_thickness * bytes); col += bytes)
{
add_new_color (bytes, &buffer[col], cube, bucket_expo);
}
/* add the right border */
for (col = ((x2 - x1 - borderaverage_thickness) * bytes);
col < ((x2 - x1) * bytes); col += bytes)
{
add_new_color (bytes, &buffer[col], cube, bucket_expo);
}
}
if ((row % 5) == 0)
gimp_progress_update ((double) row / (double) (y2 - y1));
}
max = 0; r = 0; g = 0; b = 0;
/* get max of cube */
for (i = 0; i < bucket_num; i++)
{
for (j = 0; j < bucket_num; j++)
{
for (k = 0; k < bucket_num; k++)
{
if (cube[(i << (bucket_rexpo << 1)) +
(j << bucket_rexpo) + k] > max)
{
max = cube[(i << (bucket_rexpo << 1)) +
(j << bucket_rexpo) + k];
r = (i<<bucket_expo) + (1<<(bucket_expo - 1));
g = (j<<bucket_expo) + (1<<(bucket_expo - 1));
b = (k<<bucket_expo) + (1<<(bucket_expo - 1));
}
}
}
}
/* return the color */
gimp_rgb_set_uchar (result, r, g, b);
g_free (buffer);
g_free (cube);
}
static void
add_new_color (gint bytes,
guchar *buffer,
gint *cube,
gint bucket_expo)
{
guchar r, g, b;
gint bucket_rexpo;
bucket_rexpo = 8 - bucket_expo;
r = buffer[0] >>bucket_expo;
if (bytes > 1)
{
g = buffer[1] >>bucket_expo;
}
else
{
g = 0;
}
if (bytes > 2)
{
b = buffer[2] >>bucket_expo;
}
else
{
b = 0;
}
cube[(r << (bucket_rexpo << 1)) + (g << bucket_rexpo) + b]++;
}
static gboolean run_flag = FALSE;
static void
borderaverage_ok_callback (GtkWidget *widget,
gpointer data)
{
run_flag = TRUE;
gtk_widget_destroy (GTK_WIDGET (data));
}
static gint
borderaverage_dialog (void)
{
GtkWidget *dlg;
GtkWidget *frame;
GtkWidget *vbox;
GtkWidget *hbox;
GtkWidget *label;
GtkWidget *spinbutton;
GtkObject *adj;
GtkWidget *menu;
gimp_ui_init ("borderaverage", FALSE);
dlg = gimp_dialog_new (_("Borderaverage"), "borderaverage",
gimp_standard_help_func, "filters/borderaverage.html",
GTK_WIN_POS_MOUSE,
FALSE, TRUE, FALSE,
GTK_STOCK_CANCEL, gtk_widget_destroy,
NULL, 1, NULL, FALSE, TRUE,
GTK_STOCK_OK, borderaverage_ok_callback,
NULL, NULL, NULL, TRUE, FALSE,
NULL);
g_signal_connect (dlg, "destroy",
G_CALLBACK (gtk_main_quit),
NULL);
vbox = gtk_vbox_new (FALSE, 4);
gtk_container_set_border_width (GTK_CONTAINER (vbox), 6);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dlg)->vbox), vbox, TRUE, TRUE, 0);
gtk_widget_show (vbox);
frame = gtk_frame_new (_("Border Size"));
gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
hbox = gtk_hbox_new (FALSE, 4);
gtk_container_set_border_width (GTK_CONTAINER (hbox), 4);
gtk_container_add (GTK_CONTAINER (frame), hbox);
gtk_widget_show (hbox);
label = gtk_label_new_with_mnemonic (_("_Thickness:"));
gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
spinbutton = gimp_spin_button_new (&adj, borderaverage_thickness,
0, 256, 1, 5, 0, 0, 0);
gtk_box_pack_start (GTK_BOX (hbox), spinbutton, FALSE, FALSE, 0);
gtk_widget_show (spinbutton);
gtk_label_set_mnemonic_widget (GTK_LABEL (label), spinbutton);
g_signal_connect (adj, "value_changed",
G_CALLBACK (gimp_int_adjustment_update),
&borderaverage_thickness);
frame = gtk_frame_new (_("Number of Colors"));
gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
hbox = gtk_hbox_new (FALSE, 4);
gtk_container_set_border_width (GTK_CONTAINER (hbox), 4);
gtk_container_add (GTK_CONTAINER (frame), hbox);
gtk_widget_show (hbox);
label = gtk_label_new_with_mnemonic (_("_Bucket Size:"));
gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
menu = gimp_option_menu_new2 (FALSE, G_CALLBACK (gimp_menu_item_update),
&borderaverage_bucket_exponent,
(gpointer) borderaverage_bucket_exponent,
_("1 (nonsense?)"), (gpointer) 0, NULL,
"2", (gpointer) 1, NULL,
"4", (gpointer) 2, NULL,
"8", (gpointer) 3, NULL,
"16", (gpointer) 4, NULL,
"32", (gpointer) 5, NULL,
"64", (gpointer) 6, NULL,
"128", (gpointer) 7, NULL,
_("256 (nonsense?)"), (gpointer) 8, NULL,
NULL);
gtk_box_pack_start (GTK_BOX (hbox), menu, FALSE, FALSE, 0);
gtk_widget_show (menu);
gtk_label_set_mnemonic_widget (GTK_LABEL (label), menu);
gtk_widget_show (dlg);
gtk_main ();
gdk_flush ();
return run_flag;
}
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