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gimp/plug-ins/snoise/snoise.c

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/* Solid Noise plug-in -- creates solid noise textures
* Copyright (C) 1997, 1998 Marcelo de Gomensoro Malheiros
*
* 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.
*/
/* Solid Noise plug-in version 1.03, Apr 1998
*
* This plug-in generates solid noise textures based on the
* `Noise' and `Turbulence' functions described in the paper
*
* Perlin, K, and Hoffert, E. M., "Hypertexture",
* Computer Graphics 23, 3 (August 1989)
*
* The algorithm implemented here also makes possible the
* creation of seamless tiles.
*
* You can contact me at <malheiro@dca.fee.unicamp.br>.
* Comments and improvements for this code are welcome.
*
* The overall plug-in structure is based on the Whirl plug-in,
* which is Copyright (C) 1997 Federico Mena Quintero
*/
/* Version 1.03:
*
* Added patch from Kevin Turner <kevint@poboxes.com> to use the
* current time as the random seed. Thank you!
* Incorporated some portability changes from the GIMP distribution.
*
* Version 1.02:
*
* Fixed a stupid bug with the alpha channel.
* Fixed a rounding bug for small tilable textures.
* Now the dialog is more compact; using the settings from gtkrc.
*
* Version 1.01:
*
* Quick fix for wrong pdb declaration. Also changed default seed to 1.
* Thanks to Adrian Likins and Federico Mena for the patch!
*
* Version 1.0:
*
* Initial release.
*/
#include <time.h>
#include <math.h>
#include <stdlib.h>
#include <stdio.h>
#include "gtk/gtk.h"
#include "libgimp/gimp.h"
/*---- Defines ----*/
#ifndef RAND_MAX
#define RAND_MAX 2147483647
#endif /* RAND_MAX */
#define TABLE_SIZE 64
#define WEIGHT(T) ((2.0*fabs(T)-3.0)*(T)*(T)+1.0)
#define ENTRY_WIDTH 40
#define SCALE_WIDTH 128
#define SCALE_MAX 16.0
/*---- Typedefs ----*/
typedef struct {
gint tilable;
gint turbulent;
gint seed;
gint detail;
gdouble xsize;
gdouble ysize;
/* Interface only */
gint timeseed;
} SolidNoiseValues;
typedef struct {
gint run;
} SolidNoiseInterface;
typedef struct {
double x, y;
} Vector2d;
/*---- Prototypes ----*/
static void query (void);
static void run (char *name, int nparams, GParam *param,
int *nreturn_vals, GParam **return_vals);
static void solid_noise (GDrawable *drawable);
static void solid_noise_init (void);
static double plain_noise (double x, double y, unsigned int s);
static double noise (double x, double y);
static gint solid_noise_dialog (void);
static void dialog_close_callback (GtkWidget *widget, gpointer data);
static void dialog_toggle_update (GtkWidget *widget, gpointer data);
static void dialog_entry_callback (GtkWidget *widget, gpointer data);
static void dialog_scale_callback (GtkAdjustment *adjustment, gdouble *value);
static void dialog_ok_callback (GtkWidget *widget, gpointer data);
/*---- Variables ----*/
GPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run, /* run_proc */
};
static SolidNoiseValues snvals = {
0, /* tilable */
0, /* turbulent */
1, /* seed */
1, /* detail */
4.0, /* xsize */
4.0, /* ysize */
0 /* use time seed */
};
static SolidNoiseInterface snint = {
FALSE /* run */
};
static int xclip, yclip;
static double offset, factor;
static double xsize, ysize;
static int perm_tab[TABLE_SIZE];
static Vector2d grad_tab[TABLE_SIZE];
/*---- Functions ----*/
MAIN()
static void
query (void)
{
static GParamDef args[] =
{
{ PARAM_INT32, "run_mode", "Interactive, non-interactive" },
{ PARAM_IMAGE, "image", "Input image" },
{ PARAM_DRAWABLE, "drawable", "Input drawable" },
{ PARAM_INT32, "tilable", "Create a tilable output (n=0/y=1)" },
{ PARAM_INT32, "turbulent", "Make a turbulent noise (n=0/y=1)" },
{ PARAM_INT32, "seed", "Random seed" },
{ PARAM_INT32, "detail", "Detail level (0 - 15)" },
{ PARAM_FLOAT, "xsize", "Horizontal texture size" },
{ PARAM_FLOAT, "ysize", "Vertical texture size" }
};
static GParamDef *return_vals = NULL;
static gint nargs = sizeof (args) / sizeof (args[0]);
static gint nreturn_vals = 0;
gimp_install_procedure ("plug_in_solid_noise",
"Creates a grayscale noise texture",
"Generates 2D textures using Perlin's classic solid noise function.",
"Marcelo de Gomensoro Malheiros",
"Marcelo de Gomensoro Malheiros",
"Apr 1998, v1.03",
"<Image>/Filters/Render/Solid Noise",
"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 = STATUS_SUCCESS;
run_mode = param[0].data.d_int32;
values[0].type = PARAM_STATUS;
values[0].data.d_status = status;
*nreturn_vals = 1;
*return_vals = values;
/* Get the specified drawable */
drawable = gimp_drawable_get (param[2].data.d_drawable);
/* See how we will run */
switch (run_mode) {
case RUN_INTERACTIVE:
/* Possibly retrieve data */
gimp_get_data("plug_in_solid_noise", &snvals);
/* Get information from the dialog */
if (!solid_noise_dialog ())
return;
break;
case RUN_NONINTERACTIVE:
/* Test number of arguments */
if (nparams == 9) {
snvals.tilable = param[3].data.d_int32;
snvals.turbulent = param[4].data.d_int32;
snvals.seed = param[5].data.d_int32;
snvals.detail = param[6].data.d_int32;
snvals.xsize = param[7].data.d_float;
snvals.ysize = param[8].data.d_float;
}
else
status = STATUS_CALLING_ERROR;
break;
case RUN_WITH_LAST_VALS:
/* Possibly retrieve data */
gimp_get_data("plug_in_solid_noise", &snvals);
break;
default:
break;
}
/* Create texture */
if ((status == STATUS_SUCCESS) && (gimp_drawable_color (drawable->id) ||
gimp_drawable_gray (drawable->id)))
{
/* Set the tile cache size */
gimp_tile_cache_ntiles((drawable->width + gimp_tile_width() - 1) / gimp_tile_width());
/* Run! */
solid_noise (drawable);
/* If run mode is interactive, flush displays */
if (run_mode != RUN_NONINTERACTIVE)
gimp_displays_flush();
/* Store data */
if (run_mode==RUN_INTERACTIVE || run_mode==RUN_WITH_LAST_VALS)
gimp_set_data("plug_in_solid_noise", &snvals,
sizeof(SolidNoiseValues));
}
else
{
/* gimp_message ("solid noise: cannot operate on indexed color images"); */
status = STATUS_EXECUTION_ERROR;
}
values[0].data.d_status = status;
gimp_drawable_detach(drawable);
}
static void
solid_noise (GDrawable *drawable)
{
GPixelRgn dest_rgn;
gint chns, i, has_alpha, row, col;
gint sel_x1, sel_y1, sel_x2, sel_y2;
gint sel_width, sel_height;
gint progress, max_progress;
gpointer pr;
guchar *dest, *dest_row;
guchar val;
/* Get selection area */
gimp_drawable_mask_bounds (drawable->id, &sel_x1, &sel_y1, &sel_x2, &sel_y2);
sel_width = sel_x2 - sel_x1;
sel_height = sel_y2 - sel_y1;
/* Initialization */
solid_noise_init ();
gimp_progress_init ("Solid Noise...");
progress = 0;
max_progress = sel_width * sel_height;
chns = gimp_drawable_bpp (drawable->id);
has_alpha = 0;
if (gimp_drawable_has_alpha (drawable->id)) {
chns--;
has_alpha = 1;
}
gimp_pixel_rgn_init (&dest_rgn, drawable, sel_x1, sel_y1, sel_width,
sel_height, TRUE, TRUE);
/* One, two, three, go! */
for (pr = gimp_pixel_rgns_register (1, &dest_rgn); pr != NULL;
pr = gimp_pixel_rgns_process (pr))
{
dest_row = dest_rgn.data;
for (row = dest_rgn.y; row < (dest_rgn.y + dest_rgn.h); row++)
{
dest = dest_row;
for (col = dest_rgn.x; col < (dest_rgn.x + dest_rgn.w); col++)
{
val = (guchar) floor (255.0 * noise ((double) (col - sel_x1) / sel_width, (double) (row - sel_y1) / sel_height));
for (i = 0; i < chns; i++)
*dest++ = val;
if (has_alpha)
*dest++ = 255;
}
dest_row += dest_rgn.rowstride;;
}
/* Update progress */
progress += dest_rgn.w * dest_rgn.h;
gimp_progress_update ((double) progress / (double) max_progress);
}
/* Update the drawable */
gimp_drawable_flush (drawable);
gimp_drawable_merge_shadow (drawable->id, TRUE);
gimp_drawable_update (drawable->id, sel_x1, sel_y1, sel_width, sel_height);
}
static void
solid_noise_init (void)
{
int i, j, k, t;
double m;
/* Force sane parameters */
if (snvals.detail < 0)
snvals.detail = 0;
if (snvals.detail > 15)
snvals.detail = 15;
if (snvals.seed < 0)
snvals.seed = 0;
/* Define the pseudo-random number generator seed */
if (snvals.timeseed)
snvals.seed = time(NULL);
srand (snvals.seed);
/* Set scaling factors */
if (snvals.tilable) {
xsize = ceil (snvals.xsize);
ysize = ceil (snvals.ysize);
xclip = (int) xsize;
yclip = (int) ysize;
}
else {
xsize = snvals.xsize;
ysize = snvals.ysize;
}
/* Set totally empiric normalization values */
if (snvals.turbulent) {
offset=0.0;
factor=1.0;
}
else {
offset=0.94;
factor=0.526;
}
/* Initialize the permutation table */
for (i = 0; i < TABLE_SIZE; i++)
perm_tab[i] = i;
for (i = 0; i < (TABLE_SIZE >> 1); i++) {
j = rand () % TABLE_SIZE;
k = rand () % TABLE_SIZE;
t = perm_tab[j];
perm_tab[j] = perm_tab[k];
perm_tab[k] = t;
}
/* Initialize the gradient table */
for (i = 0; i < TABLE_SIZE; i++) {
do {
grad_tab[i].x = (double)(rand () - (RAND_MAX >> 1)) / (RAND_MAX >> 1);
grad_tab[i].y = (double)(rand () - (RAND_MAX >> 1)) / (RAND_MAX >> 1);
m = grad_tab[i].x * grad_tab[i].x + grad_tab[i].y * grad_tab[i].y;
} while (m == 0.0 || m > 1.0);
m = 1.0 / sqrt(m);
grad_tab[i].x *= m;
grad_tab[i].y *= m;
}
}
static double
plain_noise (double x, double y, unsigned int s)
{
Vector2d v;
int a, b, i, j, n;
double sum;
sum = 0.0;
x *= s;
y *= s;
a = (int) floor (x);
b = (int) floor (y);
for (i = 0; i < 2; i++)
for (j = 0; j < 2; j++) {
if (snvals.tilable)
n = perm_tab[(((a + i) % (xclip * s)) + perm_tab[((b + j) % (yclip * s)) % TABLE_SIZE]) % TABLE_SIZE];
else
n = perm_tab[(a + i + perm_tab[(b + j) % TABLE_SIZE]) % TABLE_SIZE];
v.x = x - a - i;
v.y = y - b - j;
sum += WEIGHT(v.x) * WEIGHT(v.y) * (grad_tab[n].x * v.x + grad_tab[n].y * v.y);
}
return sum / s;
}
static double
noise (double x, double y)
{
int i;
unsigned int s;
double sum;
s = 1;
sum = 0.0;
x *= xsize;
y *= ysize;
for (i = 0; i <= snvals.detail; i++) {
if (snvals.turbulent)
sum += fabs (plain_noise (x, y, s));
else
sum += plain_noise (x, y, s);
s <<= 1;
}
return (sum+offset)*factor;
}
static gint
solid_noise_dialog (void)
{
GtkWidget *dlg;
GtkWidget *toggle;
GtkWidget *table;
GtkWidget *button;
GtkWidget *label;
GtkWidget *entry;
GtkWidget *seed_hbox;
GtkWidget *time_button;
GtkWidget *scale;
GtkObject *scale_data;
gchar **argv;
gint argc;
gchar buffer[32];
/* Set args */
argc = 1;
argv = g_new (gchar *, 1);
argv[0] = g_strdup ("snoise");
gtk_init (&argc, &argv);
gtk_rc_parse (gimp_gtkrc ());
/* Dialog initialization */
dlg = gtk_dialog_new ();
gtk_window_set_title (GTK_WINDOW (dlg), "Solid Noise");
gtk_window_position (GTK_WINDOW (dlg), GTK_WIN_POS_MOUSE);
gtk_container_border_width (GTK_CONTAINER (GTK_DIALOG (dlg)->action_area), 2);
gtk_signal_connect (GTK_OBJECT (dlg), "destroy",
(GtkSignalFunc) dialog_close_callback, NULL);
/* Table */
table = gtk_table_new (4, 3, FALSE);
gtk_container_border_width (GTK_CONTAINER (table), 2);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dlg)->vbox), table, TRUE, TRUE, 0);
/* Entry #1 */
label = gtk_label_new ("Seed");
gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.5);
gtk_table_attach (GTK_TABLE (table), label, 0, 1, 0, 1,
GTK_FILL, GTK_FILL, 1, 0);
gtk_widget_show (label);
seed_hbox = gtk_hbox_new (FALSE, 2);
gtk_table_attach (GTK_TABLE (table), seed_hbox, 1, 2, 0, 1,
GTK_FILL, GTK_FILL, 0, 0);
entry = gtk_entry_new ();
gtk_box_pack_start (GTK_BOX (seed_hbox), entry, TRUE, TRUE, 0);
gtk_widget_set_usize (entry, ENTRY_WIDTH, 0);
sprintf(buffer, "%d", snvals.seed);
gtk_entry_set_text (GTK_ENTRY (entry), buffer);
gtk_signal_connect (GTK_OBJECT (entry), "changed",
(GtkSignalFunc) dialog_entry_callback, &snvals.seed);
gtk_widget_show (entry);
time_button = gtk_toggle_button_new_with_label ("Time");
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON(time_button), snvals.timeseed);
gtk_signal_connect (GTK_OBJECT (time_button), "toggled",
(GtkSignalFunc) dialog_toggle_update,
&snvals.timeseed);
gtk_box_pack_end (GTK_BOX (seed_hbox), time_button, FALSE, FALSE, 0);
gtk_widget_show (time_button);
gtk_widget_show (seed_hbox);
/* Entry #2 */
label = gtk_label_new ("Detail");
gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.5);
gtk_table_attach (GTK_TABLE (table), label, 0, 1, 1, 2,
GTK_FILL, GTK_FILL, 1, 0);
gtk_widget_show (label);
entry = gtk_entry_new ();
gtk_table_attach (GTK_TABLE (table), entry, 1, 2, 1, 2,
GTK_FILL, GTK_FILL, 0, 0);
gtk_widget_set_usize (entry, ENTRY_WIDTH, 0);
sprintf(buffer, "%d", snvals.detail);
gtk_entry_set_text (GTK_ENTRY (entry), buffer);
gtk_signal_connect (GTK_OBJECT (entry), "changed",
(GtkSignalFunc) dialog_entry_callback, &snvals.detail);
gtk_widget_show (entry);
/* Check button #1 */
toggle = gtk_check_button_new_with_label ("Turbulent");
gtk_table_attach (GTK_TABLE (table), toggle, 2, 3, 0, 1,
GTK_EXPAND | GTK_FILL, GTK_FILL, 1, 0);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle), snvals.turbulent);
gtk_signal_connect (GTK_OBJECT (toggle), "toggled",
(GtkSignalFunc) dialog_toggle_update, &snvals.turbulent);
gtk_widget_show (toggle);
/* Check button #2 */
toggle = gtk_check_button_new_with_label ("Tilable");
gtk_table_attach (GTK_TABLE (table), toggle, 2, 3, 1, 2,
GTK_EXPAND | GTK_FILL, GTK_FILL, 1, 0);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle), snvals.tilable);
gtk_signal_connect (GTK_OBJECT (toggle), "toggled",
(GtkSignalFunc) dialog_toggle_update, &snvals.tilable);
gtk_widget_show (toggle);
/* Scale #1 */
label = gtk_label_new ("X Size");
gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.5);
gtk_table_attach (GTK_TABLE (table), label, 0, 1, 2, 3,
GTK_FILL, GTK_FILL, 1, 0);
gtk_widget_show (label);
scale_data = gtk_adjustment_new (snvals.xsize, 0.1, SCALE_MAX,
0.1, 0.1, 0.0);
scale = gtk_hscale_new (GTK_ADJUSTMENT (scale_data));
gtk_widget_set_usize (scale, SCALE_WIDTH, 0);
gtk_table_attach (GTK_TABLE (table), scale, 1, 3, 2, 3,
GTK_EXPAND | GTK_FILL, GTK_FILL, 0, 0);
gtk_scale_set_value_pos (GTK_SCALE (scale), GTK_POS_TOP);
gtk_scale_set_digits (GTK_SCALE (scale), 1);
gtk_range_set_update_policy (GTK_RANGE (scale), GTK_UPDATE_DELAYED);
gtk_signal_connect (GTK_OBJECT (scale_data), "value_changed",
(GtkSignalFunc) dialog_scale_callback, &snvals.xsize);
gtk_widget_show (scale);
/* Scale #2 */
label = gtk_label_new ("Y Size");
gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.5);
gtk_table_attach (GTK_TABLE (table), label, 0, 1, 3, 4,
GTK_FILL, GTK_FILL, 1, 0);
gtk_widget_show (label);
scale_data = gtk_adjustment_new (snvals.ysize, 0.1, SCALE_MAX,
0.1, 0.1, 0.0);
scale = gtk_hscale_new (GTK_ADJUSTMENT (scale_data));
gtk_widget_set_usize (scale, SCALE_WIDTH, 0);
gtk_table_attach (GTK_TABLE (table), scale, 1, 3, 3, 4,
GTK_EXPAND | GTK_FILL, GTK_FILL, 0, 0);
gtk_scale_set_value_pos (GTK_SCALE (scale), GTK_POS_TOP);
gtk_scale_set_digits (GTK_SCALE (scale), 1);
gtk_range_set_update_policy (GTK_RANGE (scale), GTK_UPDATE_DELAYED);
gtk_signal_connect (GTK_OBJECT (scale_data), "value_changed",
(GtkSignalFunc) dialog_scale_callback, &snvals.ysize);
gtk_widget_show (scale);
/* Button #1 */
button = gtk_button_new_with_label ("OK");
GTK_WIDGET_SET_FLAGS (button, GTK_CAN_DEFAULT);
gtk_signal_connect (GTK_OBJECT (button), "clicked",
(GtkSignalFunc) dialog_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 #2 */
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);
gtk_widget_show (table);
gtk_widget_show (dlg);
gtk_main ();
gdk_flush ();
return snint.run;
}
static void
dialog_close_callback (GtkWidget *widget, gpointer data)
{
gtk_main_quit ();
}
static void
dialog_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;
}
static void
dialog_entry_callback (GtkWidget *widget, gpointer data)
{
gint *text_val;
text_val = (gint *) data;
*text_val = atoi (gtk_entry_get_text (GTK_ENTRY (widget)));
}
static void
dialog_scale_callback (GtkAdjustment *adjustment, gdouble *value)
{
*value = adjustment->value;
}
static void
dialog_ok_callback (GtkWidget *widget, gpointer data)
{
snint.run = TRUE;
gtk_widget_destroy (GTK_WIDGET (data));
}
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