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gimp/plug-ins/common/scatter_hsv.c

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/* scatter_hsv.c -- This is a plug-in for the GIMP (1.0's API)
* Author: Shuji Narazaki <narazaki@InetQ.or.jp>
* Time-stamp: <2000-01-08 02:49:39 yasuhiro>
* Version: 0.42
*
* Copyright (C) 1997 Shuji Narazaki <narazaki@InetQ.or.jp>
*
* 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 <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include "libgimp/stdplugins-intl.h"
#define PLUG_IN_NAME "plug_in_scatter_hsv"
#define SHORT_NAME "scatter_hsv"
#define HELP_ID "plug-in-scatter-hsv"
static void query (void);
static void run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals);
static void scatter_hsv (GimpDrawable *drawable);
static gboolean scatter_hsv_dialog (GimpDrawable *drawable);
static void scatter_hsv_preview (GimpPreview *preview);
static void scatter_hsv_scatter (guchar *r,
guchar *g,
guchar *b);
static gint randomize_value (gint now,
gint min,
gint max,
gint mod_p,
gint rand_max);
#define SCALE_WIDTH 100
#define ENTRY_WIDTH 3
GimpPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run, /* run_proc */
};
typedef struct
{
gint holdness;
gint hue_distance;
gint saturation_distance;
gint value_distance;
gboolean preview;
} ValueType;
static ValueType VALS =
{
2,
3,
10,
10,
TRUE
};
MAIN ()
static void
query (void)
{
static GimpParamDef args [] =
{
{ GIMP_PDB_INT32, "run_mode", "Interactive, non-interactive" },
{ GIMP_PDB_IMAGE, "image", "Input image (not used)" },
{ GIMP_PDB_DRAWABLE, "drawable", "Input drawable" },
{ GIMP_PDB_INT32, "holdness", "convolution strength" },
{ GIMP_PDB_INT32, "hue_distance", "distribution distance on hue axis [0,255]" },
{ GIMP_PDB_INT32, "saturation_distance", "distribution distance on saturation axis [0,255]" },
{ GIMP_PDB_INT32, "value_distance", "distribution distance on value axis [0,255]" }
};
gimp_install_procedure (PLUG_IN_NAME,
"Scattering pixel values in HSV space",
"Scattering pixel values in HSV space",
"Shuji Narazaki (narazaki@InetQ.or.jp)",
"Shuji Narazaki",
"1997",
N_("S_catter HSV..."),
"RGB*",
GIMP_PLUGIN,
G_N_ELEMENTS (args), 0,
args, NULL);
gimp_plugin_menu_register (PLUG_IN_NAME, "<Image>/Filters/Noise");
}
static void
run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals)
{
static GimpParam values[1];
GimpPDBStatusType status = GIMP_PDB_SUCCESS;
GimpRunMode run_mode;
GimpDrawable *drawable;
INIT_I18N ();
run_mode = param[0].data.d_int32;
drawable = gimp_drawable_get (param[2].data.d_int32);
*nreturn_vals = 1;
*return_vals = values;
values[0].type = GIMP_PDB_STATUS;
values[0].data.d_status = status;
switch (run_mode)
{
case GIMP_RUN_INTERACTIVE:
gimp_get_data (PLUG_IN_NAME, &VALS);
if (!gimp_drawable_is_rgb (drawable->drawable_id))
{
g_message ("Cannot operate on non-RGB drawables.");
return;
}
if (! scatter_hsv_dialog (drawable))
return;
break;
case GIMP_RUN_NONINTERACTIVE:
VALS.holdness = param[3].data.d_int32;
VALS.hue_distance = param[4].data.d_int32;
VALS.saturation_distance = param[5].data.d_int32;
VALS.value_distance = param[6].data.d_int32;
break;
case GIMP_RUN_WITH_LAST_VALS:
gimp_get_data (PLUG_IN_NAME, &VALS);
break;
}
scatter_hsv (drawable);
if (run_mode != GIMP_RUN_NONINTERACTIVE)
gimp_displays_flush();
if (run_mode == GIMP_RUN_INTERACTIVE && status == GIMP_PDB_SUCCESS )
gimp_set_data (PLUG_IN_NAME, &VALS, sizeof (ValueType));
values[0].type = GIMP_PDB_STATUS;
values[0].data.d_status = status;
}
static void
scatter_hsv_func (const guchar *src,
guchar *dest,
gint bpp,
gpointer data)
{
guchar h, s, v;
h = src[0];
s = src[1];
v = src[2];
scatter_hsv_scatter (&h, &s, &v);
dest[0] = h;
dest[1] = s;
dest[2] = v;
if (bpp == 4)
dest[3] = src[3];
}
static void
scatter_hsv (GimpDrawable *drawable)
{
gimp_tile_cache_ntiles (2 * (drawable->width / gimp_tile_width () + 1));
gimp_progress_init (_("Scattering HSV..."));
gimp_rgn_iterate2 (drawable, 0 /* unused */, scatter_hsv_func, NULL);
gimp_drawable_detach (drawable);
}
static gint
randomize_value (gint now,
gint min,
gint max,
gint mod_p,
gint rand_max)
{
gint flag, new, steps, index;
gdouble rand_val;
steps = max - min + 1;
rand_val = g_random_double ();
for (index = 1; index < VALS.holdness; index++)
{
double tmp = g_random_double ();
if (tmp < rand_val)
rand_val = tmp;
}
if (g_random_double () < 0.5)
flag = -1;
else
flag = 1;
new = now + flag * ((int) (rand_max * rand_val) % steps);
if (new < min)
{
if (mod_p == 1)
new += steps;
else
new = min;
}
if (max < new)
{
if (mod_p == 1)
new -= steps;
else
new = max;
}
return new;
}
static void scatter_hsv_scatter (guchar *r,
guchar *g,
guchar *b)
{
gint h, s, v;
gint h1, s1, v1;
gint h2, s2, v2;
h = *r; s = *g; v = *b;
gimp_rgb_to_hsv_int (&h, &s, &v);
if (0 < VALS.hue_distance)
h = randomize_value (h, 0, 255, 1, VALS.hue_distance);
if ((0 < VALS.saturation_distance))
s = randomize_value (s, 0, 255, 0, VALS.saturation_distance);
if ((0 < VALS.value_distance))
v = randomize_value (v, 0, 255, 0, VALS.value_distance);
h1 = h; s1 = s; v1 = v;
gimp_hsv_to_rgb_int (&h, &s, &v); /* don't believe ! */
h2 = h; s2 = s; v2 = v;
gimp_rgb_to_hsv_int (&h2, &s2, &v2); /* h2 should be h1. But... */
if ((abs (h1 - h2) <= VALS.hue_distance)
&& (abs (s1 - s2) <= VALS.saturation_distance)
&& (abs (v1 - v2) <= VALS.value_distance))
{
*r = h;
*g = s;
*b = v;
}
}
static void
scatter_hsv_preview (GimpPreview *preview)
{
GimpDrawable *drawable;
GimpPixelRgn src_rgn;
guchar *src, *dst;
gint i;
gint x1, y1;
gint width, height;
gint bpp;
drawable =
gimp_drawable_preview_get_drawable (GIMP_DRAWABLE_PREVIEW (preview));
gimp_preview_get_position (preview, &x1, &y1);
gimp_preview_get_size (preview, &width, &height);
bpp = drawable->bpp;
src = g_new (guchar, width * height * bpp);
dst = g_new (guchar, width * height * bpp);
gimp_pixel_rgn_init (&src_rgn, drawable,
x1, y1, width, height,
FALSE, FALSE);
gimp_pixel_rgn_get_rect (&src_rgn, src, x1, y1, width, height);
for (i = 0; i < width * height; i++)
scatter_hsv_func (src + i * bpp, dst + i * bpp, bpp, NULL);
gimp_preview_draw_buffer (preview, dst, width * bpp);
g_free (src);
g_free (dst);
}
/* dialog stuff */
static gboolean
scatter_hsv_dialog (GimpDrawable *drawable)
{
GtkWidget *dialog;
GtkWidget *main_vbox;
GtkWidget *preview;
GtkWidget *table;
GtkObject *adj;
gboolean run;
gimp_ui_init (SHORT_NAME, TRUE);
dialog = gimp_dialog_new (_("Scatter HSV"), SHORT_NAME,
NULL, 0,
gimp_standard_help_func, HELP_ID,
GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
GTK_STOCK_OK, GTK_RESPONSE_OK,
NULL);
gtk_dialog_set_alternative_button_order (GTK_DIALOG (dialog),
GTK_RESPONSE_OK,
GTK_RESPONSE_CANCEL,
-1);
main_vbox = gtk_vbox_new (FALSE, 12);
gtk_container_set_border_width (GTK_CONTAINER (main_vbox), 12);
gtk_container_add (GTK_CONTAINER (GTK_DIALOG (dialog)->vbox), main_vbox);
gtk_widget_show (main_vbox);
preview = gimp_drawable_preview_new (drawable, &VALS.preview);
gtk_box_pack_start_defaults (GTK_BOX (main_vbox), preview);
gtk_widget_show (preview);
g_signal_connect (preview, "invalidated",
G_CALLBACK (scatter_hsv_preview),
NULL);
table = gtk_table_new (4, 3, FALSE);
gtk_table_set_col_spacings (GTK_TABLE (table), 6);
gtk_table_set_row_spacings (GTK_TABLE (table), 6);
gtk_box_pack_start (GTK_BOX (main_vbox), table, FALSE, FALSE, 0);
gtk_widget_show (table);
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 0,
_("_Holdness:"), SCALE_WIDTH, ENTRY_WIDTH,
VALS.holdness, 1, 8, 1, 2, 0,
TRUE, 0, 0,
NULL, NULL);
g_signal_connect (adj, "value_changed",
G_CALLBACK (gimp_int_adjustment_update),
&VALS.holdness);
g_signal_connect_swapped (adj, "value_changed",
G_CALLBACK (gimp_preview_invalidate),
preview);
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 1,
_("H_ue:"), SCALE_WIDTH, ENTRY_WIDTH,
VALS.hue_distance, 0, 255, 1, 8, 0,
TRUE, 0, 0,
NULL, NULL);
g_signal_connect (adj, "value_changed",
G_CALLBACK (gimp_int_adjustment_update),
&VALS.hue_distance);
g_signal_connect_swapped (adj, "value_changed",
G_CALLBACK (gimp_preview_invalidate),
preview);
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 2,
_("_Saturation:"), SCALE_WIDTH, ENTRY_WIDTH,
VALS.saturation_distance, 0, 255, 1, 8, 0,
TRUE, 0, 0,
NULL, NULL);
g_signal_connect (adj, "value_changed",
G_CALLBACK (gimp_int_adjustment_update),
&VALS.saturation_distance);
g_signal_connect_swapped (adj, "value_changed",
G_CALLBACK (gimp_preview_invalidate),
preview);
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 3,
_("_Value:"), SCALE_WIDTH, ENTRY_WIDTH,
VALS.value_distance, 0, 255, 1, 8, 0,
TRUE, 0, 0,
NULL, NULL);
g_signal_connect (adj, "value_changed",
G_CALLBACK (gimp_int_adjustment_update),
&VALS.value_distance);
g_signal_connect_swapped (adj, "value_changed",
G_CALLBACK (gimp_preview_invalidate),
preview);
gtk_widget_show (dialog);
run = (gimp_dialog_run (GIMP_DIALOG (dialog)) == GTK_RESPONSE_OK);
gtk_widget_destroy (dialog);
return run;
}
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