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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 <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <gtk/gtk.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"
static void query (void);
static void run (gchar *name,
gint nparams,
GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals);
static GimpPDBStatusType scatter_hsv (gint32 drawable_id);
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);
static gint scatter_hsv_dialog (void);
static void scatter_hsv_ok_callback (GtkWidget *widget,
gpointer data);
static gint preview_event_handler (GtkWidget *widget,
GdkEvent *event);
static void scatter_hsv_preview_update (void);
static void scatter_hsv_iscale_update (GtkAdjustment *adjustment,
gpointer data);
#define PROGRESS_UPDATE_NUM 100
#define PREVIEW_WIDTH 128
#define PREVIEW_HEIGHT 128
#define SCALE_WIDTH 100
static gint preview_width = PREVIEW_WIDTH;
static gint preview_height = PREVIEW_HEIGHT;
GimpPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run, /* run_proc */
};
typedef struct
{ /* gint, gdouble, and so on */
gint holdness;
gint hue_distance;
gint saturation_distance;
gint value_distance;
} ValueType;
static ValueType VALS =
{
2,
3,
10,
10
};
typedef struct
{
gint run;
} Interface;
static Interface INTERFACE =
{
FALSE
};
static gint drawable_id;
static GtkWidget *preview;
static gint preview_start_x = 0;
static gint preview_start_y = 0;
static guchar *preview_buffer = NULL;
static gint preview_offset_x = 0;
static gint preview_offset_y = 0;
static gint preview_dragging = FALSE;
static gint preview_drag_start_x = 0;
static gint preview_drag_start_y = 0;
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]"}
};
static gint nargs = sizeof (args) / sizeof (args[0]);
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_("<Image>/Filters/Noise/Scatter HSV..."),
"RGB*",
GIMP_PLUGIN,
nargs, 0,
args, NULL);
}
static void
run (gchar *name,
gint nparams,
GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals)
{
static GimpParam values[1];
GimpPDBStatusType status = GIMP_PDB_EXECUTION_ERROR;
GimpRunModeType run_mode;
run_mode = param[0].data.d_int32;
drawable_id = 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:
INIT_I18N_UI();
gimp_get_data (PLUG_IN_NAME, &VALS);
if (!gimp_drawable_is_rgb (drawable_id))
{
g_message ("Scatter HSV: RGB drawable is not selected.");
return;
}
if (! scatter_hsv_dialog ())
return;
break;
case GIMP_RUN_NONINTERACTIVE:
INIT_I18N();
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:
INIT_I18N();
gimp_get_data (PLUG_IN_NAME, &VALS);
break;
}
status = scatter_hsv (drawable_id);
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 GimpPDBStatusType
scatter_hsv (gint32 drawable_id)
{
GimpDrawable *drawable;
GimpPixelRgn src_rgn, dest_rgn;
guchar *src, *dest;
gpointer pr;
gint x, y, x1, x2, y1, y2;
gint gap, total, processed = 0;
drawable = gimp_drawable_get (drawable_id);
gap = (gimp_drawable_has_alpha (drawable_id)) ? 1 : 0;
gimp_drawable_mask_bounds (drawable_id, &x1, &y1, &x2, &y2);
total = (x2 - x1) * (y2 - y1);
if (total < 1)
return GIMP_PDB_EXECUTION_ERROR;
gimp_tile_cache_ntiles (2 * (drawable->width / gimp_tile_width () + 1));
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);
gimp_progress_init (_("Scatter HSV: Scattering..."));
srand (time (NULL));
pr = gimp_pixel_rgns_register (2, &src_rgn, &dest_rgn);
for (; pr != NULL; pr = gimp_pixel_rgns_process (pr))
{
int offset;
for (y = 0; y < src_rgn.h; y++)
{
src = src_rgn.data + y * src_rgn.rowstride;
dest = dest_rgn.data + y * dest_rgn.rowstride;
offset = 0;
for (x = 0; x < src_rgn.w; x++)
{
guchar h, s, v;
h = *(src + offset);
s = *(src + offset + 1);
v = *(src + offset + 2);
scatter_hsv_scatter (&h, &s, &v);
*(dest + offset ) = (guchar) h;
*(dest + offset + 1) = (guchar) s;
*(dest + offset + 2) = (guchar) v;
offset += 3;
if (gap)
{
*(dest + offset) = *(src + offset);
offset++;
}
/* the function */
if ((++processed % (total / PROGRESS_UPDATE_NUM + 1)) == 0)
gimp_progress_update ((double) processed /(double) total);
}
}
}
gimp_progress_update (1.0);
gimp_drawable_flush (drawable);
gimp_drawable_merge_shadow (drawable->id, TRUE);
gimp_drawable_update (drawable->id, x1, y1, (x2 - x1), (y2 - y1));
gimp_drawable_detach (drawable);
return GIMP_PDB_SUCCESS;
}
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 = ((double) rand () / (double) G_MAXRAND);
for (index = 1; index < VALS.holdness; index++)
{
double tmp = ((double) rand () / (double) G_MAXRAND);
if (tmp < rand_val)
rand_val = tmp;
}
flag = ((G_MAXRAND / 2) < rand()) ? 1 : -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;
}
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;
}
}
/* dialog stuff */
static gint
scatter_hsv_dialog (void)
{
GtkWidget *dlg;
GtkWidget *vbox;
GtkWidget *frame;
GtkWidget *pframe;
GtkWidget *abox;
GtkWidget *table;
GtkObject *adj;
gimp_ui_init (SHORT_NAME, TRUE);
dlg = gimp_dialog_new (_("Scatter HSV"), SHORT_NAME,
gimp_standard_help_func, "filters/scatter_hsv.html",
GTK_WIN_POS_MOUSE,
FALSE, TRUE, FALSE,
_("OK"), scatter_hsv_ok_callback,
NULL, NULL, NULL, TRUE, FALSE,
_("Cancel"), gtk_widget_destroy,
NULL, 1, NULL, FALSE, TRUE,
NULL);
gtk_signal_connect (GTK_OBJECT (dlg), "destroy",
GTK_SIGNAL_FUNC (gtk_main_quit),
NULL);
vbox = gtk_vbox_new (FALSE, 6);
gtk_container_set_border_width (GTK_CONTAINER (vbox), 6);
gtk_container_add (GTK_CONTAINER (GTK_DIALOG (dlg)->vbox), vbox);
frame = gtk_frame_new (_("Preview (1:4) - Right Click to Jump"));
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN);
gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
abox = gtk_alignment_new (0.5, 0.5, 0.0, 0.0);
gtk_container_add (GTK_CONTAINER (frame), abox);
gtk_widget_show (abox);
pframe = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (pframe), GTK_SHADOW_IN);
gtk_container_set_border_width (GTK_CONTAINER (pframe), 4);
gtk_container_add (GTK_CONTAINER (abox), pframe);
gtk_widget_show (pframe);
preview = gtk_preview_new (GTK_PREVIEW_COLOR);
{
gint width = gimp_drawable_width (drawable_id);
gint height = gimp_drawable_height (drawable_id);
preview_width = (PREVIEW_WIDTH < width) ? PREVIEW_WIDTH : width;
preview_height = (PREVIEW_HEIGHT < height) ? PREVIEW_HEIGHT : height;
}
gtk_preview_size (GTK_PREVIEW (preview), preview_width * 2, preview_height);
scatter_hsv_preview_update ();
gtk_container_add (GTK_CONTAINER (pframe), preview);
gtk_widget_set_events (preview,
GDK_BUTTON_PRESS_MASK |
GDK_BUTTON_RELEASE_MASK |
GDK_BUTTON_MOTION_MASK |
GDK_POINTER_MOTION_HINT_MASK);
gtk_signal_connect (GTK_OBJECT (preview), "event",
(GtkSignalFunc) preview_event_handler,
NULL);
gtk_widget_show (preview);
gtk_widget_show (frame);
frame = gtk_frame_new (_("Parameter Settings"));
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN);
gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
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);
gtk_widget_show (table);
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 0,
_("Holdness:"), SCALE_WIDTH, 0,
VALS.holdness, 1, 8, 1, 2, 0,
TRUE, 0, 0,
NULL, NULL);
gtk_signal_connect (GTK_OBJECT (adj), "value_changed",
GTK_SIGNAL_FUNC (scatter_hsv_iscale_update),
&VALS.holdness);
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 1,
_("Hue:"), SCALE_WIDTH, 0,
VALS.hue_distance, 0, 255, 1, 8, 0,
TRUE, 0, 0,
NULL, NULL);
gtk_signal_connect (GTK_OBJECT (adj), "value_changed",
GTK_SIGNAL_FUNC (scatter_hsv_iscale_update),
&VALS.hue_distance);
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 2,
_("Saturation:"), SCALE_WIDTH, 0,
VALS.saturation_distance, 0, 255, 1, 8, 0,
TRUE, 0, 0,
NULL, NULL);
gtk_signal_connect (GTK_OBJECT (adj), "value_changed",
GTK_SIGNAL_FUNC (scatter_hsv_iscale_update),
&VALS.saturation_distance);
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 3,
_("Value:"), SCALE_WIDTH, 0,
VALS.value_distance, 0, 255, 1, 8, 0,
TRUE, 0, 0,
NULL, NULL);
gtk_signal_connect (GTK_OBJECT (adj), "value_changed",
GTK_SIGNAL_FUNC (scatter_hsv_iscale_update),
&VALS.value_distance);
gtk_widget_show (table);
gtk_widget_show (frame);
gtk_widget_show (vbox);
gtk_widget_show (dlg);
gtk_main ();
gdk_flush ();
return INTERFACE.run;
}
static gint
preview_event_handler (GtkWidget *widget,
GdkEvent *event)
{
gint x, y;
gint dx, dy;
GdkEventButton *bevent;
gtk_widget_get_pointer (widget, &x, &y);
bevent = (GdkEventButton *) event;
switch (event->type)
{
case GDK_BUTTON_PRESS:
if (x < preview_width)
{
if (bevent->button == 3)
{
preview_offset_x = - x;
preview_offset_y = - y;
scatter_hsv_preview_update ();
}
else
{
preview_dragging = TRUE;
preview_drag_start_x = x;
preview_drag_start_y = y;
gtk_grab_add (widget);
}
}
break;
case GDK_BUTTON_RELEASE:
if (preview_dragging)
{
gtk_grab_remove (widget);
preview_dragging = FALSE;
scatter_hsv_preview_update ();
}
break;
case GDK_MOTION_NOTIFY:
if (preview_dragging)
{
dx = x - preview_drag_start_x;
dy = y - preview_drag_start_y;
preview_drag_start_x = x;
preview_drag_start_y = y;
if ((dx == 0) && (dy == 0))
break;
preview_offset_x = MAX (preview_offset_x - dx, 0);
preview_offset_y = MAX (preview_offset_y - dy, 0);
scatter_hsv_preview_update ();
}
break;
default:
break;
}
return FALSE;
}
static void
scatter_hsv_preview_update (void)
{
GimpDrawable *drawable;
GimpPixelRgn src_rgn;
gint scale;
gint x, y, dx, dy;
gint bound_start_x, bound_start_y, bound_end_x, bound_end_y;
gint src_has_alpha = FALSE;
gint src_is_gray = FALSE;
gint src_bpp, src_bpl;
guchar data[3];
gdouble shift_rate;
drawable = gimp_drawable_get (drawable_id);
gimp_drawable_mask_bounds (drawable_id,
&bound_start_x, &bound_start_y,
&bound_end_x, &bound_end_y);
src_has_alpha = gimp_drawable_has_alpha (drawable_id);
src_is_gray = gimp_drawable_is_gray (drawable_id);
src_bpp = (src_is_gray ? 1 : 3) + (src_has_alpha ? 1 : 0);
src_bpl = preview_width * src_bpp;
if (! preview_buffer)
preview_buffer
= (guchar *) g_malloc (src_bpl * preview_height * sizeof (guchar));
if (preview_offset_x < 0)
preview_offset_x = (bound_end_x - bound_start_x) * (- preview_offset_x) / preview_width;
if (preview_offset_y < 0)
preview_offset_y = (bound_end_y - bound_start_y) * (- preview_offset_y) / preview_height;
preview_start_x = CLAMP (bound_start_x + preview_offset_x,
bound_start_x, MAX (bound_end_x - preview_width, 0));
preview_start_y = CLAMP (bound_start_y + preview_offset_y,
bound_start_y, MAX (bound_end_y - preview_height, 0));
if (preview_start_x == bound_start_x)
preview_offset_x = 0;
if (preview_start_y == bound_start_y)
preview_offset_y =0;
gimp_pixel_rgn_init (&src_rgn, drawable, preview_start_x, preview_start_y,
preview_width, preview_height,
FALSE, FALSE);
/* Since it's small, get whole data before processing. */
gimp_pixel_rgn_get_rect (&src_rgn, preview_buffer,
preview_start_x, preview_start_y,
preview_width, preview_height);
scale = 4;
shift_rate = (gdouble) (scale - 1) / ( 2 * scale);
for (y = 0; y < preview_height/4; y++)
{
for (x = 0; x < preview_width/4; x++)
{
gint pos;
gint i;
pos = (gint)(y + preview_height * shift_rate) * src_bpl
+ (gint)(x + preview_width * shift_rate) * src_bpp;
for (i = 0; i < src_bpp; i++)
data[i] = preview_buffer[pos + i];
scatter_hsv_scatter (data+0, data+1, data+2);
for (dy = 0; dy < scale; dy++)
for (dx = 0; dx < scale; dx++)
gtk_preview_draw_row (GTK_PREVIEW (preview), data,
preview_width + x * scale + dx,
y * scale + dy, 1);
}
}
for (y = 0; y < preview_height; y ++)
for (x = 0; x < preview_width; x++)
{
gint i;
for (i = 0; i < src_bpp; i++)
data[i] = preview_buffer[y * src_bpl + x * src_bpp + i];
scatter_hsv_scatter (data+0, data+1, data+2);
gtk_preview_draw_row (GTK_PREVIEW (preview), data, x, y, 1);
}
gtk_widget_draw (preview, NULL);
gdk_flush ();
}
static void
scatter_hsv_ok_callback (GtkWidget *widget,
gpointer data)
{
INTERFACE.run = TRUE;
gtk_widget_destroy (GTK_WIDGET (data));
}
static void
scatter_hsv_iscale_update (GtkAdjustment *adjustment,
gpointer data)
{
gimp_int_adjustment_update (adjustment, data);
scatter_hsv_preview_update ();
}
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