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gimp/plug-ins/common/randomize.c

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/****************************************************************************
* This is a plugin for GIMP v 1.0 or later. Documentation is
* available at http://www.rru.com/~meo/gimp/ .
*
* Copyright (C) 1997-8 Miles O'Neal <meo@rru.com> http://www.rru.com/~meo/
* GUI based on GTK code from:
* alienmap (Copyright (C) 1996, 1997 Daniel Cotting)
* plasma (Copyright (C) 1996 Stephen Norris),
* oilify (Copyright (C) 1996 Torsten Martinsen),
* ripple (Copyright (C) 1997 Brian Degenhardt) and
* whirl (Copyright (C) 1997 Federico Mena Quintero).
*
* 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.
*
****************************************************************************/
/****************************************************************************
* Randomize:
*
* randomize version 1.7 (1 May 1998, MEO)
*
* Please send any patches or suggestions to the author: meo@rru.com .
*
* This plug-in adds a user-defined amount of randomization to an
* image. Variations include:
*
* - hurling (spewing random colors)
* - picking a nearby pixel at random
* - slurring (a crude form of melting)
*
* In any case, for each pixel in the selection or image,
* whether to change the pixel is decided by picking a
* random number, weighted by the user's "randomization" percentage.
* If the random number is in range, the pixel is modified. Picking
* one selects the new pixel value at random from the current and
* adjacent pixels. Hurling assigns a random value to the pixel.
* Slurring sort of melts downwards; if a pixel is to be slurred,
* there is an 80% chance the pixel above be used; otherwise, one
* of the pixels adjacent to the one above is used (even odds as
* to which it will be).
*
* Picking, hurling and slurring work with any image type.
*
* This plug-in's effectiveness varies a lot with the type
* and clarity of the image being "randomized".
*
* Hurling more than 75% or so onto an existing image will
* make the image nearly unrecognizable. By 90% hurl, most
* images are indistinguishable from random noise.
*
* The repeat count is especially useful with slurring.
*
* TODO List
*
* - add a real melt function
****************************************************************************/
/****************************************************************************
*
* 3 Jan 2008 -- weskaggs
*
* Added previews and ability to control the intensity at each point
* using a "map drawable"
*
****************************************************************************/
#include "config.h"
#include <string.h>
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include "libgimp/stdplugins-intl.h"
/*********************************
*
* PLUGIN-SPECIFIC CONSTANTS
*
********************************/
#define PLUG_IN_BINARY "randomize"
/*
* progress meter update frequency
*/
#define PROG_UPDATE_TIME ((row % 12) == 0)
gchar *PLUG_IN_PROC[] =
{
"plug-in-randomize-hurl",
"plug-in-randomize-pick",
"plug-in-randomize-slur",
"plug-in-variable-hurl",
"plug-in-variable-pick",
"plug-in-variable-slur",
};
gchar *RNDM_NAME[] =
{
N_("Random Hurl"),
N_("Random Pick"),
N_("Random Slur"),
N_("Random Hurl"),
N_("Random Pick"),
N_("Random Slur"),
};
#define RNDM_HURL 1
#define RNDM_PICK 2
#define RNDM_SLUR 3
#define VARIABLE_HURL 4
#define VARIABLE_PICK 5
#define VARIABLE_SLUR 6
#define SEED_DEFAULT 10
#define SCALE_WIDTH 100
gint rndm_type = RNDM_HURL; /* hurl, pick, etc. */
/*********************************
*
* PLUGIN-SPECIFIC STRUCTURES AND DATA
*
********************************/
typedef struct
{
gdouble rndm_pct; /* likelihood of randomization (as %age) */
gdouble rndm_rcount; /* repeat count */
gboolean randomize; /* Whether to use a random seed */
guint seed; /* seed value for g_rand_set_seed() function */
gint32 drawable_id; /* drawable that we are working on */
gboolean use_map; /* use a mask to scale likelihoods at each pixel */
gint32 map_id; /* drawable used to scale likelihood */
gboolean map_is_rgb; /* whether map drawable is rgb or grayscale */
} RandomizeVals;
static RandomizeVals pivals =
{
50.0,
1.0,
FALSE,
SEED_DEFAULT,
-1,
FALSE,
-1,
FALSE
};
static GRand *gr; /* The GRand object which generates the
* random numbers */
static GtkWidget *map_drawable_combo;
/*********************************
*
* LOCAL FUNCTIONS
*
********************************/
static void query (void);
static void run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals);
static void randomize (GimpDrawable *drawable,
GimpPreview *preview);
static inline void randomize_prepare_row (GimpPixelRgn *pixel_rgn,
guchar *data,
gint x,
gint y,
gint w);
static gboolean randomize_dialog (GimpDrawable *drawable);
static gboolean dialog_constrain (gint32 image_id,
gint32 drawable_id,
gpointer data);
static void dialog_usemap_callback (GtkToggleButton *toggle,
GimpPreview *preview);
static void dialog_setmap_callback (GimpIntComboBox *combo,
GimpPreview *preview);
/************************************ Guts ***********************************/
const GimpPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run, /* run_proc */
};
MAIN ()
static void
query (void)
{
static const GimpParamDef args[] =
{
{ GIMP_PDB_INT32, "run_mode", "Interactive, non-interactive" },
{ GIMP_PDB_IMAGE, "image", "Input image (unused)" },
{ GIMP_PDB_DRAWABLE, "drawable", "Input drawable" },
{ GIMP_PDB_FLOAT, "rndm_pct", "Randomization percentage (1.0 - 100.0)" },
{ GIMP_PDB_FLOAT, "rndm_rcount", "Repeat count (1.0 - 100.0)" },
{ GIMP_PDB_INT32, "randomize", "Use random seed (TRUE, FALSE)" },
{ GIMP_PDB_INT32, "seed", "Seed value (used only if randomize is FALSE)" }
};
static const GimpParamDef args_with_map[] =
{
{ GIMP_PDB_INT32, "run_mode", "Interactive, non-interactive" },
{ GIMP_PDB_IMAGE, "image", "Input image (unused)" },
{ GIMP_PDB_DRAWABLE, "drawable", "Input drawable" },
{ GIMP_PDB_FLOAT, "rndm_pct", "Randomization percentage (1.0 - 100.0)" },
{ GIMP_PDB_FLOAT, "rndm_rcount", "Repeat count (1.0 - 100.0)" },
{ GIMP_PDB_INT32, "randomize", "Use random seed (TRUE, FALSE)" },
{ GIMP_PDB_INT32, "seed", "Seed value (used only if randomize is FALSE)" },
{ GIMP_PDB_DRAWABLE, "map_drawable", "Drawable used as intensity mask" }
};
const gchar *hurl_blurb =
N_("Completely randomize a fraction of pixels");
const gchar *pick_blurb =
N_("Randomly interchange some pixels with neighbors");
const gchar *slur_blurb =
N_("Randomly slide some pixels downward (similar to melting)");
const gchar *hurl_help =
"This plug-in ``hurls'' randomly-valued pixels onto the selection or "
"image. You may select the percentage of pixels to modify and the number "
"of times to repeat the process.";
const gchar *pick_help =
"This plug-in replaces a pixel with a random adjacent pixel. You may "
"select the percentage of pixels to modify and the number of times to "
"repeat the process.";
const gchar *slur_help =
"This plug-in slurs (melts like a bunch of icicles) an image. You may "
"select the percentage of pixels to modify and the number of times to "
"repeat the process.";
const gchar *author = "Miles O'Neal <meo@rru.com>";
const gchar *copyrights = "Miles O'Neal, Spencer Kimball, Peter Mattis, "
"Torsten Martinsen, Brian Degenhardt, Federico Mena Quintero, Stephen "
"Norris, Daniel Cotting";
const gchar *copyright_date = "1995-1998";
gimp_install_procedure ("plug-in-randomize-hurl",
hurl_blurb,
hurl_help,
author,
copyrights,
copyright_date,
N_("_Hurl..."),
"RGB*, GRAY*, INDEXED*",
GIMP_PLUGIN,
G_N_ELEMENTS (args), 0,
args, NULL);
gimp_install_procedure ("plug-in-randomize-pick",
pick_blurb,
pick_help,
author,
copyrights,
copyright_date,
N_("_Pick..."),
"RGB*, GRAY*, INDEXED*",
GIMP_PLUGIN,
G_N_ELEMENTS (args), 0,
args, NULL);
gimp_install_procedure ("plug-in-randomize-slur",
slur_blurb,
slur_help,
author,
copyrights,
copyright_date,
N_("_Slur..."),
"RGB*, GRAY*, INDEXED*",
GIMP_PLUGIN,
G_N_ELEMENTS (args), 0,
args, NULL);
gimp_install_procedure ("plug-in-variable-hurl",
hurl_blurb,
hurl_help,
author,
copyrights,
copyright_date,
N_("_Hurl..."),
"RGB*, GRAY*, INDEXED*",
GIMP_PLUGIN,
G_N_ELEMENTS (args_with_map), 0,
args_with_map, NULL);
gimp_install_procedure ("plug-in-variable-pick",
pick_blurb,
pick_help,
author,
copyrights,
copyright_date,
N_("_Pick..."),
"RGB*, GRAY*, INDEXED*",
GIMP_PLUGIN,
G_N_ELEMENTS (args_with_map), 0,
args_with_map, NULL);
gimp_install_procedure ("plug-in-variable-slur",
slur_blurb,
slur_help,
author,
copyrights,
copyright_date,
N_("_Slur..."),
"RGB*, GRAY*, INDEXED*",
GIMP_PLUGIN,
G_N_ELEMENTS (args_with_map), 0,
args_with_map, NULL);
gimp_plugin_menu_register ("plug-in-variable-hurl", "<Image>/Filters/Noise");
gimp_plugin_menu_register ("plug-in-variable-pick", "<Image>/Filters/Blur");
gimp_plugin_menu_register ("plug-in-variable-slur", "<Image>/Filters/Noise");
}
static void
run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals)
{
GimpDrawable *drawable;
GimpRunMode run_mode;
GimpPDBStatusType status = GIMP_PDB_SUCCESS;
static GimpParam values[1];
INIT_I18N ();
/*
* Get the specified drawable, do standard initialization.
*/
if (strcmp (name, "plug-in-randomize-hurl") == 0)
rndm_type = RNDM_HURL;
else if (strcmp (name, "plug-in-randomize-pick") == 0)
rndm_type = RNDM_PICK;
else if (strcmp (name, "plug-in-randomize-slur") == 0)
rndm_type = RNDM_SLUR;
else if (strcmp (name, "plug-in-variable-hurl") == 0)
rndm_type = VARIABLE_HURL;
else if (strcmp (name, "plug-in-variable-pick") == 0)
rndm_type = VARIABLE_PICK;
else if (strcmp (name, "plug-in-variable-slur") == 0)
rndm_type = VARIABLE_SLUR;
run_mode = param[0].data.d_int32;
pivals.drawable_id = param[2].data.d_drawable;
drawable = gimp_drawable_get (pivals.drawable_id);
*nreturn_vals = 1;
*return_vals = values;
values[0].type = GIMP_PDB_STATUS;
values[0].data.d_status = status;
gr = g_rand_new ();
/*
* Make sure the drawable type is appropriate.
*/
if (gimp_drawable_is_rgb (drawable->drawable_id) ||
gimp_drawable_is_gray (drawable->drawable_id) ||
gimp_drawable_is_indexed (drawable->drawable_id))
{
gimp_tile_cache_ntiles (4 * drawable->ntile_cols);
switch (run_mode)
{
case GIMP_RUN_INTERACTIVE:
gimp_get_data (PLUG_IN_PROC[rndm_type - 1], &pivals);
if (! randomize_dialog (drawable)) /* return on Cancel */
return;
break;
case GIMP_RUN_NONINTERACTIVE:
pivals.rndm_pct = (gdouble) param[3].data.d_float;
pivals.rndm_rcount = (gdouble) param[4].data.d_float;
pivals.randomize = (gboolean) param[5].data.d_int32;
pivals.seed = (gint) param[6].data.d_int32;
/* if we are running a "variable" version, we have 8 args */
if (nparams == 8)
{
pivals.map_id = param[7].data.d_drawable;
pivals.use_map = TRUE;
pivals.map_is_rgb = gimp_drawable_is_rgb (pivals.map_id);
}
else
pivals.use_map = FALSE;
if (pivals.randomize)
pivals.seed = g_random_int ();
if ((rndm_type != RNDM_PICK &&
rndm_type != RNDM_SLUR &&
rndm_type != RNDM_HURL) ||
(pivals.rndm_pct < 1.0 || pivals.rndm_pct > 100.0) ||
(pivals.rndm_rcount < 1.0 || pivals.rndm_rcount > 100.0))
{
status = GIMP_PDB_CALLING_ERROR;
}
break;
case GIMP_RUN_WITH_LAST_VALS:
gimp_get_data (PLUG_IN_PROC[rndm_type - 1], &pivals);
if (pivals.randomize)
pivals.seed = g_random_int ();
break;
default:
break;
}
if (status == GIMP_PDB_SUCCESS)
{
gimp_progress_init_printf ("%s", gettext (RNDM_NAME[rndm_type - 1]));
g_rand_set_seed (gr, pivals.seed);
randomize (drawable, NULL);
if (run_mode != GIMP_RUN_NONINTERACTIVE)
{
gimp_displays_flush ();
}
if (run_mode == GIMP_RUN_INTERACTIVE)
{
gimp_set_data (PLUG_IN_PROC[rndm_type - 1], &pivals,
sizeof (RandomizeVals));
}
}
}
else
{
status = GIMP_PDB_EXECUTION_ERROR;
}
g_rand_free (gr);
values[0].data.d_status = status;
gimp_drawable_detach(drawable);
}
/*********************************
*
* randomize_prepare_row()
*
* Get a row of pixels. If the requested row
* is off the edge, clone the edge row.
*
********************************/
static inline void
randomize_prepare_row (GimpPixelRgn *pixel_rgn,
guchar *data,
int x,
int y,
int w)
{
gint b;
if (y <= 0)
{
gimp_pixel_rgn_get_row(pixel_rgn, data, x, (y + 1), w);
}
else if (y >= pixel_rgn->h)
{
gimp_pixel_rgn_get_row(pixel_rgn, data, x, (y - 1), w);
}
else
{
gimp_pixel_rgn_get_row(pixel_rgn, data, x, y, w);
}
/*
* Fill in edge pixels
*/
for (b = 0; b < pixel_rgn->bpp; b++)
{
data[-(gint)pixel_rgn->bpp + b] = data[b];
data[w * pixel_rgn->bpp + b] = data[(w - 1) * pixel_rgn->bpp + b];
}
}
/*********************************
*
* randomize()
*
* Actually mess with the image.
*
********************************/
static void
randomize (GimpDrawable *drawable,
GimpPreview *preview)
{
GimpDrawable *map_drawable = NULL;
GimpPixelRgn srcPR, destPR;
GimpPixelRgn destPR2, mapPR;
GimpPixelRgn *sp, *dp, *tp, *mp;
gint width, height;
gint bytes;
gint map_bytes = 0;
guchar *dest, *d;
guchar *prev_row, *pr;
guchar *cur_row, *cr;
guchar *next_row, *nr;
guchar *map_row = NULL;
guchar *mr = NULL;
guchar *tmp;
gint row, col;
gint x1, y1, x2, y2;
gint cnt;
gint has_alpha, ind;
gint i, j, k;
if (preview)
{
gimp_preview_get_position (preview, &x1, &y1);
gimp_preview_get_size (preview, &width, &height);
x2 = x1 + width;
y2 = y1 + height;
}
else
{
gimp_drawable_mask_bounds (drawable->drawable_id, &x1, &y1, &x2, &y2);
width = (x2 - x1);
height = (y2 - y1);
}
bytes = drawable->bpp;
has_alpha = gimp_drawable_has_alpha (drawable->drawable_id);
if (pivals.use_map)
{
map_drawable = gimp_drawable_get (pivals.map_id);
pivals.map_is_rgb = gimp_drawable_is_rgb (pivals.map_id);
if (! map_drawable)
return;
map_bytes = map_drawable->bpp;
}
/*
* allocate row buffers
*/
prev_row = g_new (guchar, (x2 - x1 + 2) * bytes);
cur_row = g_new (guchar, (x2 - x1 + 2) * bytes);
next_row = g_new (guchar, (x2 - x1 + 2) * bytes);
dest = g_new (guchar, (x2 - x1) * bytes);
if (pivals.use_map)
map_row = g_new (guchar, (x2 - x1 + 2) * map_bytes);
/*
* initialize the pixel regions
*/
gimp_pixel_rgn_init (&srcPR, drawable, x1, y1, width, height, FALSE, FALSE);
gimp_pixel_rgn_init (&destPR, drawable, x1, y1, width, height, TRUE, TRUE);
gimp_pixel_rgn_init (&destPR2, drawable, x1, y1, width, height, TRUE, TRUE);
if (pivals.use_map)
gimp_pixel_rgn_init (&mapPR, map_drawable, x1, y1, width, height,
FALSE, FALSE);
sp = &srcPR;
dp = &destPR;
tp = NULL;
if (pivals.use_map)
mp = &mapPR;
pr = prev_row + bytes;
cr = cur_row + bytes;
nr = next_row + bytes;
if (pivals.use_map)
mr = map_row + map_bytes;
for (cnt = 1; cnt <= pivals.rndm_rcount; cnt++)
{
/*
* prepare the first row and previous row
*/
randomize_prepare_row (sp, pr, x1, y1 - 1, (x2 - x1));
randomize_prepare_row (dp, cr, x1, y1, (x2 - x1));
/*
* loop through the rows, applying the selected convolution
*/
for (row = y1; row < y2; row++)
{
/* prepare the next row */
randomize_prepare_row (sp, nr, x1, row + 1, (x2 - x1));
if (pivals.use_map)
randomize_prepare_row (mp, mr, x1, row, (x2 - x1));
d = dest;
ind = 0;
for (col = 0; col < (x2 - x1); col++)
{
gint pct = pivals.rndm_pct;
if (pivals.use_map)
{
gint value;
gint c = col * map_bytes;
if (pivals.map_is_rgb)
value = ((gint) mr[c] + (gint) mr[c + 1] + (gint) mr[c + 2]) / 3;
else
value = mr[c];
pct *= value / 255.0;
}
if (g_rand_int_range (gr, 0, 100) < pct)
{
switch (rndm_type)
{
/*
* HURL
* Just assign a random value.
*/
case RNDM_HURL:
case VARIABLE_HURL:
for (j = 0; j < bytes; j++)
*d++ = g_rand_int_range (gr, 0, 256);
break;
/*
* PICK
* pick at random from a neighboring pixel.
*/
case RNDM_PICK:
case VARIABLE_PICK:
k = g_rand_int_range (gr, 0, 9);
for (j = 0; j < bytes; j++)
{
i = col * bytes + j;
switch (k)
{
case 0:
*d++ = (gint) pr[i - bytes];
break;
case 1:
*d++ = (gint) pr[i];
break;
case 2:
*d++ = (gint) pr[i + bytes];
break;
case 3:
*d++ = (gint) cr[i - bytes];
break;
case 4:
*d++ = (gint) cr[i];
break;
case 5:
*d++ = (gint) cr[i + bytes];
break;
case 6:
*d++ = (gint) nr[i - bytes];
break;
case 7:
*d++ = (gint) nr[i];
break;
case 8:
*d++ = (gint) nr[i + bytes];
break;
}
}
break;
/*
* SLUR
* 80% chance it's from directly above,
* 10% from above left,
* 10% from above right.
*/
case RNDM_SLUR:
case VARIABLE_SLUR:
k = g_rand_int_range (gr, 0, 10);
for (j = 0; j < bytes; j++)
{
i = col*bytes + j;
switch (k )
{
case 0:
*d++ = (gint) pr[i - bytes];
break;
case 9:
*d++ = (gint) pr[i + bytes];
break;
default:
*d++ = (gint) pr[i];
break;
}
}
break;
}
/*
* Otherwise, this pixel was not selected for randomization,
* so use the current value.
*/
}
else
{
for (j = 0; j < bytes; j++)
*d++ = (gint) cr[col * bytes + j];
}
}
/*
* Save the modified row, shuffle the row pointers, and every
* so often, update the progress meter.
*/
gimp_pixel_rgn_set_row (dp, dest, x1, row, (x2 - x1));
tmp = pr;
pr = cr;
cr = nr;
nr = tmp;
if (! preview && PROG_UPDATE_TIME)
{
gdouble base = (gdouble) cnt / pivals.rndm_rcount;
gdouble inc = (gdouble) row / ((y2 - y1) * pivals.rndm_rcount);
gimp_progress_update (base + inc);
}
}
/*
* if we have more cycles to perform, swap the src and dest Pixel Regions
*/
if (cnt < pivals.rndm_rcount)
{
if (tp != NULL)
{
tp = dp;
dp = sp;
sp = tp;
}
else
{
tp = &srcPR;
sp = &destPR;
dp = &destPR2;
}
}
}
if (! preview)
gimp_progress_update (1.0);
/*
* update the randomized region
*/
if (preview)
{
gimp_drawable_preview_draw_region (GIMP_DRAWABLE_PREVIEW (preview),
dp);
}
else
{
gimp_drawable_flush (drawable);
gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
gimp_drawable_update (drawable->drawable_id, x1, y1, (x2 - x1), (y2 - y1));
}
/*
* clean up after ourselves.
*/
g_free (prev_row);
g_free (cur_row);
g_free (next_row);
g_free (dest);
if (pivals.use_map)
g_free (map_row);
}
/*********************************
*
* GUI ROUTINES
*
********************************/
/*********************************
*
* randomize_dialog() - set up the plug-in's dialog box
*
********************************/
static gboolean
randomize_dialog (GimpDrawable *drawable)
{
GtkWidget *dlg;
GtkWidget *table;
GtkWidget *main_vbox;
GtkWidget *preview;
GtkObject *adj;
gboolean run;
GtkWidget *combo;
GtkWidget *toggle;
GtkWidget *hbox;
gimp_ui_init (PLUG_IN_BINARY, FALSE);
/*
* sanity check
*/
if (pivals.map_id == -1)
pivals.map_id = pivals.drawable_id;
dlg = gimp_dialog_new (gettext (RNDM_NAME[rndm_type - 1]), PLUG_IN_BINARY,
NULL, 0,
gimp_standard_help_func, PLUG_IN_PROC[rndm_type - 1],
GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
GTK_STOCK_OK, GTK_RESPONSE_OK,
NULL);
gtk_dialog_set_alternative_button_order (GTK_DIALOG (dlg),
GTK_RESPONSE_OK,
GTK_RESPONSE_CANCEL,
-1);
gimp_window_set_transient (GTK_WINDOW (dlg));
main_vbox = gtk_vbox_new (FALSE, 12);
gtk_container_set_border_width (GTK_CONTAINER (main_vbox), 12);
gtk_container_add (GTK_CONTAINER (GTK_DIALOG (dlg)->vbox), main_vbox);
gtk_widget_show (main_vbox);
preview = gimp_drawable_preview_new (drawable, NULL);
gtk_box_pack_start (GTK_BOX (main_vbox), preview, TRUE, TRUE, 0);
gtk_widget_show (preview);
g_signal_connect_swapped (preview, "invalidated",
G_CALLBACK (randomize),
drawable);
table = gtk_table_new (3, 3, FALSE);
gtk_table_set_col_spacings (GTK_TABLE (table), 6);
gtk_table_set_row_spacings (GTK_TABLE (table), 6);
gtk_container_set_border_width (GTK_CONTAINER (table), 12);
gtk_box_pack_start (GTK_BOX (main_vbox), table, TRUE, TRUE, 0);
gtk_widget_show(table);
/*
* Randomization percentage label & scale (1 to 100)
*/
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 1,
_("R_andomization (%):"), SCALE_WIDTH, 0,
pivals.rndm_pct, 1.0, 100.0, 1.0, 10.0, 0,
TRUE, 0, 0,
_("Percentage of pixels to be filtered"), NULL);
g_signal_connect (adj, "value-changed",
G_CALLBACK (gimp_double_adjustment_update),
&pivals.rndm_pct);
g_signal_connect_swapped (adj, "value-changed",
G_CALLBACK (gimp_preview_invalidate),
preview);
/*
* Repeat count label & scale (1 to 100). Don't show this for Hurl,
* since repeating is equivalent to changing the percentage.
*/
if (rndm_type != VARIABLE_HURL)
{
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 2,
_("R_epeat:"), SCALE_WIDTH, 0,
pivals.rndm_rcount, 1.0, 100.0, 1.0, 10.0, 0,
TRUE, 0, 0,
_("Number of times to apply filter"), NULL);
g_signal_connect (adj, "value-changed",
G_CALLBACK (gimp_double_adjustment_update),
&pivals.rndm_rcount);
g_signal_connect_swapped (adj, "value-changed",
G_CALLBACK (gimp_preview_invalidate),
preview);
}
/*
* drawable menu for blur intensity map
*/
hbox = gtk_hbox_new(FALSE, 0);
gtk_box_pack_start (GTK_BOX (main_vbox), hbox, FALSE, FALSE, 0);
gtk_widget_show (hbox);
toggle = gtk_check_button_new_with_label (_("Use intensity map:"));
gtk_box_pack_start (GTK_BOX (hbox), toggle, FALSE, FALSE, 5);
gtk_widget_show (toggle);
gimp_help_set_help_data
(toggle, _("Image that determines the intensity of blurring at each location"),
PLUG_IN_PROC[rndm_type - 1]);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle), pivals.use_map);
g_signal_connect (toggle, "toggled",
(GCallback) dialog_usemap_callback, preview);
hbox = gtk_hbox_new (FALSE, 0);
gtk_box_pack_start (GTK_BOX (main_vbox), hbox, FALSE, FALSE, 0);
gtk_widget_show (hbox);
combo = gimp_drawable_combo_box_new (dialog_constrain,
GINT_TO_POINTER (pivals.drawable_id));
map_drawable_combo = combo;
gimp_int_combo_box_connect (GIMP_INT_COMBO_BOX (combo),
pivals.map_id,
(GCallback) dialog_setmap_callback,
preview);
gtk_box_pack_start (GTK_BOX (hbox), combo, FALSE, FALSE, 10);
gtk_widget_show (combo);
gtk_widget_show (dlg);
run = (gimp_dialog_run (GIMP_DIALOG (dlg)) == GTK_RESPONSE_OK);
gtk_widget_destroy (dlg);
return run;
}
/* The intensity map can be rgb or grayscale, must have the same shape as the base image */
static gboolean
dialog_constrain (gint32 image_id,
gint32 drawable_id,
gpointer data)
{
gint32 src_drawable_id = GPOINTER_TO_INT (data);
if (drawable_id == -1) /* checking an image, not a drawable */
return FALSE;
if(gimp_drawable_width (drawable_id) == gimp_drawable_width (src_drawable_id)
&& gimp_drawable_height (drawable_id) == gimp_drawable_height (src_drawable_id)
&& (gimp_drawable_is_rgb (drawable_id) || gimp_drawable_is_gray (drawable_id)) )
return TRUE;
else
return FALSE;
}
/*
* called if the user toggles the "use intensity map" button.
*/
static void
dialog_usemap_callback (GtkToggleButton *toggle,
GimpPreview *preview)
{
gint active = gtk_toggle_button_get_active (toggle);
if (active != pivals.use_map)
{
pivals.use_map = active;
if (active)
gimp_int_combo_box_get_active (GIMP_INT_COMBO_BOX (map_drawable_combo),
&pivals.map_id);
gtk_widget_set_sensitive (map_drawable_combo, active);
gimp_preview_invalidate (preview);
}
}
/*
* called if the user changes the map drawable.
*/
static void
dialog_setmap_callback (GimpIntComboBox *combo,
GimpPreview *preview)
{
gint id;
if (! gimp_int_combo_box_get_active (combo, &id))
{
id = pivals.drawable_id;
gimp_int_combo_box_set_active (combo, id);
}
pivals.map_id = id;
pivals.map_is_rgb = gimp_drawable_is_rgb (id);
gimp_preview_invalidate (preview);
}
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