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gimp/plug-ins/common/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 "config.h"
#include <time.h>
#include <stdlib.h>
#include <stdio.h>
#include <gtk/gtk.h>
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include "libgimp/stdplugins-intl.h"
/*---- Defines ----*/
#define TABLE_SIZE 64
#define WEIGHT(T) ((2.0*fabs(T)-3.0)*(T)*(T)+1.0)
#define SCALE_WIDTH 128
#define SCALE_MAX 16.0
/*---- Typedefs ----*/
typedef struct
{
gint tilable;
gint turbulent;
gint seed;
gint detail;
gdouble xsize;
gdouble ysize;
} SolidNoiseValues;
typedef struct
{
gint run;
} SolidNoiseInterface;
/*---- Prototypes ----*/
static void query (void);
static void run (gchar *name,
gint nparams,
GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals);
static void solid_noise (GimpDrawable *drawable);
static void solid_noise_init (void);
static gdouble plain_noise (gdouble x,
gdouble y,
guint s);
static gdouble noise (gdouble x,
gdouble y);
static gint solid_noise_dialog (void);
static void dialog_ok_callback (GtkWidget *widget,
gpointer data);
/*---- Variables ----*/
GimpPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run, /* run_proc */
};
static SolidNoiseValues snvals =
{
0, /* tilable */
0, /* turbulent */
0, /* seed */
1, /* detail */
4.0, /* xsize */
4.0, /* ysize */
};
static SolidNoiseInterface snint =
{
FALSE /* run */
};
static gint xclip, yclip;
static gdouble offset, factor;
static gdouble xsize, ysize;
static gint perm_tab[TABLE_SIZE];
static GimpVector2 grad_tab[TABLE_SIZE];
/*---- Functions ----*/
MAIN ()
static void
query (void)
{
static GimpParamDef args[] =
{
{ GIMP_PDB_INT32, "run_mode", "Interactive, non-interactive" },
{ GIMP_PDB_IMAGE, "image", "Input image" },
{ GIMP_PDB_DRAWABLE, "drawable", "Input drawable" },
{ GIMP_PDB_INT32, "tilable", "Create a tilable output (n=0/y=1)" },
{ GIMP_PDB_INT32, "turbulent", "Make a turbulent noise (n=0/y=1)" },
{ GIMP_PDB_INT32, "seed", "Random seed" },
{ GIMP_PDB_INT32, "detail", "Detail level (0 - 15)" },
{ GIMP_PDB_FLOAT, "xsize", "Horizontal texture size" },
{ GIMP_PDB_FLOAT, "ysize", "Vertical texture size" }
};
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",
N_("<Image>/Filters/Render/Clouds/Solid Noise..."),
"RGB*, GRAY*",
GIMP_PLUGIN,
G_N_ELEMENTS (args), 0,
args, NULL);
}
static void
run (gchar *name,
gint nparams,
GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals)
{
static GimpParam values[1];
GimpDrawable *drawable;
GimpRunMode run_mode;
GimpPDBStatusType status;
status = GIMP_PDB_SUCCESS;
run_mode = param[0].data.d_int32;
*nreturn_vals = 1;
*return_vals = values;
values[0].type = GIMP_PDB_STATUS;
values[0].data.d_status = status;
/* Get the specified drawable */
drawable = gimp_drawable_get (param[2].data.d_drawable);
/* See how we will run */
switch (run_mode)
{
case GIMP_RUN_INTERACTIVE:
INIT_I18N_UI();
/* Possibly retrieve data */
gimp_get_data("plug_in_solid_noise", &snvals);
/* Get information from the dialog */
if (!solid_noise_dialog ())
return;
break;
case GIMP_RUN_NONINTERACTIVE:
INIT_I18N();
/* Test number of arguments */
if (nparams != 9)
{
status = GIMP_PDB_CALLING_ERROR;
}
else
{
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;
}
break;
case GIMP_RUN_WITH_LAST_VALS:
INIT_I18N();
/* Possibly retrieve data */
gimp_get_data ("plug_in_solid_noise", &snvals);
break;
default:
break;
}
/* Create texture */
if ((status == GIMP_PDB_SUCCESS) &&
(gimp_drawable_is_rgb (drawable->drawable_id) ||
gimp_drawable_is_gray (drawable->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 != GIMP_RUN_NONINTERACTIVE)
gimp_displays_flush ();
/* Store data */
if (run_mode == GIMP_RUN_INTERACTIVE || run_mode == GIMP_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 = GIMP_PDB_EXECUTION_ERROR;
}
values[0].data.d_status = status;
gimp_drawable_detach (drawable);
}
static void
solid_noise (GimpDrawable *drawable)
{
GimpPixelRgn 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->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->drawable_id);
has_alpha = 0;
if (gimp_drawable_has_alpha (drawable->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->drawable_id, TRUE);
gimp_drawable_update (drawable->drawable_id,
sel_x1, sel_y1, sel_width, sel_height);
}
static void
solid_noise_init (void)
{
gint i, j, k, t;
gdouble m;
GRand *gr;
gr = g_rand_new ();
/* Force sane parameters */
if (snvals.detail < 0)
snvals.detail = 0;
if (snvals.detail > 15)
snvals.detail = 15;
if (snvals.seed < 0)
snvals.seed = 0;
/* 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 = g_rand_int_range (gr, 0, TABLE_SIZE);
k = g_rand_int_range (gr, 0, 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 = g_rand_double_range (gr, -1, 1);
grad_tab[i].y = g_rand_double_range (gr, -1, 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 gdouble
plain_noise (gdouble x,
gdouble y,
guint s)
{
GimpVector2 v;
gint a, b, i, j, n;
gdouble 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 gdouble
noise (gdouble x,
gdouble y)
{
gint i;
guint s;
gdouble 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 *frame;
GtkWidget *toggle;
GtkWidget *table;
GtkWidget *label;
GtkWidget *seed_hbox;
GtkWidget *spinbutton;
GtkObject *adj;
gimp_ui_init ("snoise", FALSE);
/* Dialog initialization */
dlg = gimp_dialog_new (_("Solid Noise"), "snoise",
gimp_standard_help_func, "filters/snoise.html",
GTK_WIN_POS_MOUSE,
FALSE, TRUE, FALSE,
GTK_STOCK_CANCEL, gtk_widget_destroy,
NULL, 1, NULL, FALSE, TRUE,
GTK_STOCK_OK, dialog_ok_callback,
NULL, NULL, NULL, TRUE, FALSE,
NULL);
g_signal_connect (dlg, "destroy",
G_CALLBACK (gtk_main_quit),
NULL);
frame = gtk_frame_new (_("Parameter Settings"));
gtk_container_set_border_width (GTK_CONTAINER (frame), 6);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dlg)->vbox), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
/* Table */
table = gtk_table_new (4, 3, 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);
/* Random Seed */
seed_hbox = gimp_random_seed_new (&snvals.seed);
label = gimp_table_attach_aligned (GTK_TABLE (table), 0, 0,
_("_Random Seed:"), 1.0, 0.5,
seed_hbox, 1, TRUE);
gtk_label_set_mnemonic_widget (GTK_LABEL (label),
GIMP_RANDOM_SEED_SPINBUTTON (seed_hbox));
/* Detail */
spinbutton = gimp_spin_button_new (&adj, snvals.detail,
1, 15, 1, 3, 0, 1, 0);
gimp_table_attach_aligned (GTK_TABLE (table), 0, 1,
_("_Detail:"), 1.0, 0.5,
spinbutton, 1, TRUE);
g_signal_connect (adj, "value_changed",
G_CALLBACK (gimp_int_adjustment_update),
&snvals.detail);
/* Turbulent */
toggle = gtk_check_button_new_with_mnemonic ( _("T_urbulent"));
gtk_table_attach (GTK_TABLE (table), toggle, 2, 3, 0, 1,
GTK_SHRINK | GTK_FILL, GTK_FILL, 1, 0);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle), snvals.turbulent);
gtk_widget_show (toggle);
g_signal_connect (toggle, "toggled",
G_CALLBACK (gimp_toggle_button_update),
&snvals.turbulent);
/* Tilable */
toggle = gtk_check_button_new_with_mnemonic ( _("T_ilable"));
gtk_table_attach (GTK_TABLE (table), toggle, 2, 3, 1, 2,
GTK_SHRINK | GTK_FILL, GTK_FILL, 1, 0);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle), snvals.tilable);
gtk_widget_show (toggle);
g_signal_connect (toggle, "toggled",
G_CALLBACK (gimp_toggle_button_update),
&snvals.tilable);
/* X Size */
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 2,
_("_X Size:"), SCALE_WIDTH, 0,
snvals.xsize, 0.1, SCALE_MAX, 0.1, 1.0, 1,
TRUE, 0, 0,
NULL, NULL);
g_signal_connect (adj, "value_changed",
G_CALLBACK (gimp_double_adjustment_update),
&snvals.xsize);
/* Y Size */
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 3,
_("_Y Size:"), SCALE_WIDTH, 0,
snvals.ysize, 0.1, SCALE_MAX, 0.1, 1.0, 1,
TRUE, 0, 0,
NULL, NULL);
g_signal_connect (adj, "value_changed",
G_CALLBACK (gimp_double_adjustment_update),
&snvals.ysize);
gtk_widget_show (table);
gtk_widget_show (dlg);
gtk_main ();
gdk_flush ();
return snint.run;
}
static void
dialog_ok_callback (GtkWidget *widget,
gpointer data)
{
snint.run = TRUE;
gtk_widget_destroy (GTK_WIDGET (data));
}
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