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gimp/plug-ins/noisify/noisify.c

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/*
* This is a plugin for the GIMP.
*
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
* Copyright (C) 1996 Torsten Martinsen
*
* 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.
*
* $Id$
*/
/*
* This filter adds random noise to an image.
* The amount of noise can be set individually for each RGB channel.
* This filter does not operate on indexed images.
*/
#include <stdlib.h>
#include <stdio.h>
#include <time.h>
#include "gtk/gtk.h"
#include "libgimp/gimp.h"
#define ENTRY_WIDTH 60
#define SCALE_WIDTH 125
#define TILE_CACHE_SIZE 16
typedef struct
{
gint independent;
gdouble noise[4]; /* per channel */
} NoisifyVals;
typedef struct
{
gint run;
} NoisifyInterface;
/* Declare local functions.
*/
static void query (void);
static void run (char *name,
int nparams,
GParam *param,
int *nreturn_vals,
GParam **return_vals);
static void noisify (GDrawable * drawable);
static gint noisify_dialog (gint channels);
static gdouble gauss (void);
static void noisify_close_callback (GtkWidget *widget,
gpointer data);
static void noisify_ok_callback (GtkWidget *widget,
gpointer data);
static void noisify_toggle_update (GtkWidget *widget,
gpointer data);
static void noisify_scale_update (GtkAdjustment *adjustment,
double *scale_val);
static void noisify_entry_update (GtkWidget *widget,
gdouble *value);
static void dialog_create_value (char *title,
GtkTable *table,
int row,
gdouble *value,
double left,
double right);
GPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run, /* run_proc */
};
static NoisifyVals nvals =
{
TRUE,
{ 0.20, 0.20, 0.20, 0.20 }
};
static NoisifyInterface noise_int =
{
FALSE /* run */
};
MAIN ()
static void
query ()
{
static GParamDef args[] =
{
{ PARAM_INT32, "run_mode", "Interactive, non-interactive" },
{ PARAM_IMAGE, "image", "Input image (unused)" },
{ PARAM_DRAWABLE, "drawable", "Input drawable" },
{ PARAM_INT32, "independent", "Noise in channels independent" },
{ PARAM_FLOAT, "noise_1", "Noise in the first channel (red, gray)" },
{ PARAM_FLOAT, "noise_2", "Noise in the second channel (green, gray_alpha)" },
{ PARAM_FLOAT, "noise_3", "Noise in the third channel (blue)" },
{ PARAM_FLOAT, "noise_4", "Noise in the fourth channel (alpha)" }
};
static GParamDef *return_vals = NULL;
static int nargs = sizeof (args) / sizeof (args[0]);
static int nreturn_vals = 0;
gimp_install_procedure ("plug_in_noisify",
"Adds random noise to a drawable's channels",
"More here later",
"Torsten Martinsen",
"Torsten Martinsen",
"1996",
"<Image>/Filters/Noise/Noisify",
"RGB*, GRAY*",
PROC_PLUG_IN,
nargs, nreturn_vals,
args, return_vals);
}
static void
run (char *name,
int nparams,
GParam *param,
int *nreturn_vals,
GParam **return_vals)
{
static GParam values[1];
GDrawable *drawable;
GRunModeType run_mode;
GStatusType status = STATUS_SUCCESS;
run_mode = param[0].data.d_int32;
*nreturn_vals = 1;
*return_vals = values;
values[0].type = PARAM_STATUS;
values[0].data.d_status = status;
/* Get the specified drawable */
drawable = gimp_drawable_get (param[2].data.d_drawable);
switch (run_mode)
{
case RUN_INTERACTIVE:
/* Possibly retrieve data */
gimp_get_data ("plug_in_noisify", &nvals);
/* First acquire information with a dialog */
if (! noisify_dialog (drawable->bpp))
{
gimp_drawable_detach (drawable);
return;
}
break;
case RUN_NONINTERACTIVE:
/* Make sure all the arguments are there! */
if (nparams != 8)
status = STATUS_CALLING_ERROR;
if (status == STATUS_SUCCESS)
{
nvals.independent = (param[3].data.d_int32) ? TRUE : FALSE;
nvals.noise[0] = param[4].data.d_float;
nvals.noise[1] = param[5].data.d_float;
nvals.noise[2] = param[6].data.d_float;
nvals.noise[3] = param[7].data.d_float;
}
break;
case RUN_WITH_LAST_VALS:
/* Possibly retrieve data */
gimp_get_data ("plug_in_noisify", &nvals);
break;
default:
break;
}
/* Make sure that the drawable is gray or RGB color */
if (gimp_drawable_color (drawable->id) || gimp_drawable_gray (drawable->id))
{
gimp_progress_init ("Adding Noise...");
gimp_tile_cache_ntiles (TILE_CACHE_SIZE);
/* seed the random number generator */
srand (time (NULL));
/* compute the luminosity which exceeds the luminosity threshold */
noisify (drawable);
if (run_mode != RUN_NONINTERACTIVE)
gimp_displays_flush ();
/* Store data */
if (run_mode == RUN_INTERACTIVE)
gimp_set_data ("plug_in_noisify", &nvals, sizeof (NoisifyVals));
}
else
{
/* gimp_message ("blur: cannot operate on indexed color images"); */
status = STATUS_EXECUTION_ERROR;
}
values[0].data.d_status = status;
gimp_drawable_detach (drawable);
}
static void
noisify (GDrawable *drawable)
{
GPixelRgn src_rgn, dest_rgn;
guchar *src_row, *dest_row;
guchar *src, *dest;
gint row, col, b;
gint x1, y1, x2, y2, p;
gint noise;
gint progress, max_progress;
gpointer pr;
/* initialize */
noise = 0;
gimp_drawable_mask_bounds (drawable->id, &x1, &y1, &x2, &y2);
gimp_pixel_rgn_init (&src_rgn, drawable, x1, y1, (x2 - x1), (y2 - y1), FALSE, FALSE);
gimp_pixel_rgn_init (&dest_rgn, drawable, x1, y1, (x2 - x1), (y2 - y1), TRUE, TRUE);
/* Initialize progress */
progress = 0;
max_progress = (x2 - x1) * (y2 - y1);
for (pr = gimp_pixel_rgns_register (2, &src_rgn, &dest_rgn); pr != NULL; pr = gimp_pixel_rgns_process (pr))
{
src_row = src_rgn.data;
dest_row = dest_rgn.data;
for (row = 0; row < src_rgn.h; row++)
{
src = src_row;
dest = dest_row;
for (col = 0; col < src_rgn.w; col++)
{
if (nvals.independent == FALSE)
noise = (gint) (nvals.noise[0] * gauss() * 127);
for (b = 0; b < src_rgn.bpp; b++)
{
if (nvals.independent == TRUE)
noise = (gint) (nvals.noise[b] * gauss() * 127);
p = src[b] + noise;
if (p < 0)
p = 0;
else if (p > 255)
p = 255;
if (nvals.noise[b] != 0)
dest[b] = p;
}
src += src_rgn.bpp;
dest += dest_rgn.bpp;
}
src_row += src_rgn.rowstride;
dest_row += dest_rgn.rowstride;
}
/* Update progress */
progress += src_rgn.w * src_rgn.h;
gimp_progress_update ((double) progress / (double) max_progress);
}
/* update the blurred region */
gimp_drawable_flush (drawable);
gimp_drawable_merge_shadow (drawable->id, TRUE);
gimp_drawable_update (drawable->id, x1, y1, (x2 - x1), (y2 - y1));
}
static gint
noisify_dialog (gint channels)
{
GtkWidget *dlg;
GtkWidget *button;
GtkWidget *toggle;
GtkWidget *frame;
GtkWidget *table;
gchar buffer[32];
gchar **argv;
gint argc;
int i;
argc = 1;
argv = g_new (gchar *, 1);
argv[0] = g_strdup ("noisify");
gtk_init (&argc, &argv);
gtk_rc_parse (gimp_gtkrc ());
dlg = gtk_dialog_new ();
gtk_window_set_title (GTK_WINDOW (dlg), "Noisify");
gtk_window_position (GTK_WINDOW (dlg), GTK_WIN_POS_MOUSE);
gtk_signal_connect (GTK_OBJECT (dlg), "destroy",
(GtkSignalFunc) noisify_close_callback,
NULL);
/* Action area */
button = gtk_button_new_with_label ("OK");
GTK_WIDGET_SET_FLAGS (button, GTK_CAN_DEFAULT);
gtk_signal_connect (GTK_OBJECT (button), "clicked",
(GtkSignalFunc) noisify_ok_callback,
dlg);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dlg)->action_area), button, TRUE, TRUE, 0);
gtk_widget_grab_default (button);
gtk_widget_show (button);
button = gtk_button_new_with_label ("Cancel");
GTK_WIDGET_SET_FLAGS (button, GTK_CAN_DEFAULT);
gtk_signal_connect_object (GTK_OBJECT (button), "clicked",
(GtkSignalFunc) gtk_widget_destroy,
GTK_OBJECT (dlg));
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dlg)->action_area), button, TRUE, TRUE, 0);
gtk_widget_show (button);
/* parameter settings */
frame = gtk_frame_new ("Parameter Settings");
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN);
gtk_container_border_width (GTK_CONTAINER (frame), 10);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dlg)->vbox), frame, TRUE, TRUE, 0);
table = gtk_table_new (channels + 1, 3, FALSE);
gtk_container_border_width (GTK_CONTAINER (table), 10);
gtk_container_add (GTK_CONTAINER (frame), table);
toggle = gtk_check_button_new_with_label ("Independent");
gtk_table_attach (GTK_TABLE (table), toggle, 0, 2, 0, 1, GTK_FILL, 0, 0, 0);
gtk_signal_connect (GTK_OBJECT (toggle), "toggled",
(GtkSignalFunc) noisify_toggle_update,
&nvals.independent);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle), nvals.independent);
gtk_widget_show (toggle);
/* for (i = 0; i < channels; i++)
{
sprintf (buffer, "Channel #%d", i);
dialog_create_value(buffer, GTK_TABLE(table), i+1, &nvals.noise[i], 0.0, 1.0);
}
*/
if (channels == 1)
{
sprintf (buffer, "Gray");
dialog_create_value(buffer, GTK_TABLE(table), 1, &nvals.noise[0], 0.0, 1.0);
}
else if (channels == 2)
{
sprintf (buffer, "Gray");
dialog_create_value(buffer, GTK_TABLE(table), 1, &nvals.noise[0], 0.0, 1.0);
sprintf (buffer, "Alpha");
dialog_create_value(buffer, GTK_TABLE(table), 2, &nvals.noise[1], 0.0, 1.0);
}
else if (channels == 3)
{
sprintf (buffer, "Red");
dialog_create_value(buffer, GTK_TABLE(table), 1, &nvals.noise[0], 0.0, 1.0);
sprintf (buffer, "Green");
dialog_create_value(buffer, GTK_TABLE(table), 2, &nvals.noise[1], 0.0, 1.0);
sprintf (buffer, "Blue");
dialog_create_value(buffer, GTK_TABLE(table), 3, &nvals.noise[2], 0.0, 1.0);
}
else if (channels == 4)
{
sprintf (buffer, "Red");
dialog_create_value(buffer, GTK_TABLE(table), 1, &nvals.noise[0], 0.0, 1.0);
sprintf (buffer, "Green");
dialog_create_value(buffer, GTK_TABLE(table), 2, &nvals.noise[1], 0.0, 1.0);
sprintf (buffer, "Blue");
dialog_create_value(buffer, GTK_TABLE(table), 3, &nvals.noise[2], 0.0, 1.0);
sprintf (buffer, "Alpha");
dialog_create_value(buffer, GTK_TABLE(table), 4, &nvals.noise[3], 0.0, 1.0);
}
else
{
for (i = 0; i < channels; i++)
{
sprintf (buffer, "Channel #%d", i);
dialog_create_value(buffer, GTK_TABLE(table), i+1, &nvals.noise[i], 0.0, 1.0);
}
}
gtk_widget_show (frame);
gtk_widget_show (table);
gtk_widget_show (dlg);
gtk_main ();
gdk_flush ();
return noise_int.run;
}
/*
* Return a Gaussian (aka normal) random variable.
*
* Adapted from ppmforge.c, which is part of PBMPLUS.
* The algorithm comes from:
* 'The Science Of Fractal Images'. Peitgen, H.-O., and Saupe, D. eds.
* Springer Verlag, New York, 1988.
*/
static gdouble
gauss ()
{
gint i;
gdouble sum = 0.0;
for (i = 0; i < 4; i++)
sum += rand () & 0x7FFF;
return sum * 5.28596089837e-5 - 3.46410161514;
}
/* Noisify interface functions */
static void
noisify_close_callback (GtkWidget *widget,
gpointer data)
{
gtk_main_quit ();
}
static void
noisify_ok_callback (GtkWidget *widget,
gpointer data)
{
noise_int.run = TRUE;
gtk_widget_destroy (GTK_WIDGET (data));
}
static void
noisify_toggle_update (GtkWidget *widget,
gpointer data)
{
int *toggle_val;
toggle_val = (int *) data;
if (GTK_TOGGLE_BUTTON (widget)->active)
*toggle_val = TRUE;
else
*toggle_val = FALSE;
}
/*
* Thanks to Quartic for these.
*/
static void
dialog_create_value(char *title, GtkTable *table, int row, gdouble *value, double left, double right)
{
GtkWidget *label;
GtkWidget *scale;
GtkWidget *entry;
GtkObject *scale_data;
char buf[256];
label = gtk_label_new(title);
gtk_misc_set_alignment(GTK_MISC(label), 0.0, 0.5);
gtk_table_attach(table, label, 0, 1, row, row + 1, GTK_FILL, GTK_FILL, 4, 0);
gtk_widget_show(label);
scale_data = gtk_adjustment_new(*value, left, right,
(right - left) / 200.0,
(right - left) / 200.0,
0.0);
gtk_signal_connect(GTK_OBJECT(scale_data), "value_changed",
(GtkSignalFunc) noisify_scale_update,
value);
scale = gtk_hscale_new(GTK_ADJUSTMENT(scale_data));
gtk_widget_set_usize(scale, SCALE_WIDTH, 0);
gtk_table_attach(table, scale, 1, 2, row, row + 1, GTK_EXPAND | GTK_FILL, GTK_FILL, 0, 0);
gtk_scale_set_draw_value(GTK_SCALE(scale), FALSE);
gtk_scale_set_digits(GTK_SCALE(scale), 3);
gtk_range_set_update_policy(GTK_RANGE(scale), GTK_UPDATE_CONTINUOUS);
gtk_widget_show(scale);
entry = gtk_entry_new();
gtk_object_set_user_data(GTK_OBJECT(entry), scale_data);
gtk_object_set_user_data(scale_data, entry);
gtk_widget_set_usize(entry, ENTRY_WIDTH, 0);
sprintf(buf, "%0.2f", *value);
gtk_entry_set_text(GTK_ENTRY(entry), buf);
gtk_signal_connect(GTK_OBJECT(entry), "changed",
(GtkSignalFunc) noisify_entry_update,
value);
gtk_table_attach(GTK_TABLE(table), entry, 2, 3, row, row + 1, GTK_FILL, GTK_FILL, 4, 0);
gtk_widget_show(entry);
}
static void
noisify_entry_update(GtkWidget *widget, gdouble *value)
{
GtkAdjustment *adjustment;
gdouble new_value;
new_value = atof(gtk_entry_get_text(GTK_ENTRY(widget)));
if (*value != new_value) {
adjustment = gtk_object_get_user_data(GTK_OBJECT(widget));
if ((new_value >= adjustment->lower) &&
(new_value <= adjustment->upper)) {
*value = new_value;
adjustment->value = new_value;
gtk_signal_emit_by_name(GTK_OBJECT(adjustment), "value_changed");
} /* if */
} /* if */
}
static void
noisify_scale_update (GtkAdjustment *adjustment, gdouble *value)
{
GtkWidget *entry;
char buf[256];
if (*value != adjustment->value) {
*value = adjustment->value;
entry = gtk_object_get_user_data(GTK_OBJECT(adjustment));
sprintf(buf, "%0.2f", *value);
gtk_signal_handler_block_by_data(GTK_OBJECT(entry), value);
gtk_entry_set_text(GTK_ENTRY(entry), buf);
gtk_signal_handler_unblock_by_data(GTK_OBJECT(entry), value);
} /* if */
}
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