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gimp/plug-ins/common/destripe.c

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/*
* Destripe filter for The GIMP -- an image manipulation
* program
*
* Copyright 1997 Marc Lehmann, heavily modified from a filter by
* Michael Sweet.
*
* 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.
*
* Contents:
*
* main() - Main entry - just call gimp_main()...
* query() - Respond to a plug-in query...
* run() - Run the filter...
* destripe() - Destripe an image.
* destripe_dialog() - Popup a dialog window...
* preview_init() - Initialize the preview window...
* preview_scroll_callback() - Update the preview when a scrollbar is moved.
* preview_update() - Update the preview window.
* preview_exit() - Free all memory used by the preview window...
* dialog_iscale_update() - Update the value field using the scale.
* dialog_histogram_callback()
*
* 1997/08/16 * Initial Revision.
* 1998/02/06 * Minor changes.
*/
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef __GNUC__
#warning GTK_DISABLE_DEPRECATED
#endif
#undef GTK_DISABLE_DEPRECATED
#include <gtk/gtk.h>
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include "libgimp/stdplugins-intl.h"
/*
* Constants...
*/
#define PLUG_IN_NAME "plug_in_destripe"
#define PLUG_IN_VERSION "0.2"
#define HELP_ID "plug-in-destripe"
#define PREVIEW_SIZE 200
#define SCALE_WIDTH 140
#define MAX_AVG 100
/*
* 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 destripe (void);
static gint destripe_dialog (void);
static void preview_init (void);
static void preview_update (void);
static void preview_scroll_callback (void);
/*
* Globals...
*/
GimpPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run /* run_proc */
};
GtkWidget *preview; /* Preview widget */
gint preview_width, /* Width of preview widget */
preview_height, /* Height of preview widget */
preview_x1, /* Upper-left X of preview */
preview_y1, /* Upper-left Y of preview */
preview_x2, /* Lower-right X of preview */
preview_y2; /* Lower-right Y of preview */
GtkObject *hscroll_data, /* Horizontal scrollbar data */
*vscroll_data; /* Vertical scrollbar data */
GimpDrawable *drawable = NULL; /* Current image */
gint sel_x1, /* Selection bounds */
sel_y1,
sel_x2,
sel_y2;
gint img_bpp; /* Bytes-per-pixel in image */
typedef struct
{
gboolean histogram;
gint avg_width;
} DestripeValues;
static DestripeValues vals =
{
FALSE,
36
};
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, "avg_width", "Averaging filter width (default = 36)" }
};
gimp_install_procedure (PLUG_IN_NAME,
"Destripe filter, used to remove vertical stripes "
"caused by cheap scanners.",
"This plug-in tries to remove vertical stripes from "
"an image.",
"Marc Lehmann <pcg@goof.com>",
"Marc Lehmann <pcg@goof.com>",
PLUG_IN_VERSION,
N_("<Image>/Filters/Enhance/Des_tripe..."),
"RGB*, GRAY*",
GIMP_PLUGIN,
G_N_ELEMENTS (args), 0,
args, NULL);
}
static void
run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals)
{
GimpRunMode run_mode; /* Current run mode */
GimpPDBStatusType status; /* Return status */
static GimpParam values[1]; /* Return values */
INIT_I18N ();
/*
* Initialize parameter data...
*/
status = GIMP_PDB_SUCCESS;
run_mode = param[0].data.d_int32;
values[0].type = GIMP_PDB_STATUS;
values[0].data.d_status = status;
*nreturn_vals = 1;
*return_vals = values;
/*
* Get drawable information...
*/
drawable = gimp_drawable_get (param[2].data.d_drawable);
gimp_drawable_mask_bounds (drawable->drawable_id,
&sel_x1, &sel_y1, &sel_x2, &sel_y2);
img_bpp = gimp_drawable_bpp (drawable->drawable_id);
/*
* See how we will run
*/
switch (run_mode)
{
case GIMP_RUN_INTERACTIVE:
/*
* Possibly retrieve data...
*/
gimp_get_data (PLUG_IN_NAME, &vals);
/*
* Get information from the dialog...
*/
if (!destripe_dialog ())
return;
break;
case GIMP_RUN_NONINTERACTIVE:
/*
* Make sure all the arguments are present...
*/
if (nparams != 4)
status = GIMP_PDB_CALLING_ERROR;
else
vals.avg_width = param[3].data.d_int32;
break;
case GIMP_RUN_WITH_LAST_VALS :
/*
* Possibly retrieve data...
*/
gimp_get_data (PLUG_IN_NAME, &vals);
break;
default :
status = GIMP_PDB_CALLING_ERROR;
break;
};
/*
* Destripe the image...
*/
if (status == GIMP_PDB_SUCCESS)
{
if ((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!
*/
destripe ();
/*
* If run mode is interactive, flush displays...
*/
if (run_mode != GIMP_RUN_NONINTERACTIVE)
gimp_displays_flush ();
/*
* Store data...
*/
if (run_mode == GIMP_RUN_INTERACTIVE)
gimp_set_data (PLUG_IN_NAME, &vals, sizeof (vals));
}
else
status = GIMP_PDB_EXECUTION_ERROR;
};
/*
* Reset the current run status...
*/
values[0].data.d_status = status;
/*
* Detach from the drawable...
*/
gimp_drawable_detach (drawable);
}
static inline void
preview_draw_row (gint x,
gint y,
gint w,
guchar *row)
{
guchar *rgb = g_new (guchar, w * 3);
guchar *rgb_ptr;
gint i;
switch (img_bpp)
{
case 1:
case 2:
for (i = 0, rgb_ptr = rgb; i < w; i++, row += img_bpp, rgb_ptr += 3)
rgb_ptr[0] = rgb_ptr[1] = rgb_ptr[2] = *row;
gtk_preview_draw_row (GTK_PREVIEW (preview), rgb, x, y, w);
break;
case 3:
gtk_preview_draw_row (GTK_PREVIEW (preview), row, x, y, w);
break;
case 4:
for (i = 0, rgb_ptr = rgb; i < w; i++, row += 4, rgb_ptr += 3)
{
rgb_ptr[0] = row[0];
rgb_ptr[1] = row[1];
rgb_ptr[2] = row[2];
}
gtk_preview_draw_row (GTK_PREVIEW (preview), rgb, x, y, w);
break;
}
g_free (rgb);
}
static void
destripe_rect (gint sel_x1,
gint sel_y1,
gint sel_x2,
gint sel_y2,
gboolean do_preview)
{
GimpPixelRgn src_rgn; /* source image region */
GimpPixelRgn dst_rgn; /* destination image region */
guchar *src_rows; /* image data */
double progress, progress_inc;
int sel_width = sel_x2 - sel_x1;
int sel_height = sel_y2 - sel_y1;
long *hist, *corr; /* "histogram" data */
int tile_width = gimp_tile_width ();
int i, x, y, ox, cols;
/* initialize */
progress = 0.0;
progress_inc = 0.0;
/*
* Let the user know what we're doing...
*/
if (!do_preview)
{
gimp_progress_init (_("Destriping..."));
progress = 0;
progress_inc = 0.5 * tile_width / sel_width;
}
/*
* Setup for filter...
*/
gimp_pixel_rgn_init (&src_rgn, drawable,
sel_x1, sel_y1, sel_width, sel_height, FALSE, FALSE);
gimp_pixel_rgn_init (&dst_rgn, drawable,
sel_x1, sel_y1, sel_width, sel_height, TRUE, TRUE);
hist = g_new (long, sel_width * img_bpp);
corr = g_new (long, sel_width * img_bpp);
src_rows = g_new (guchar, tile_width * sel_height * img_bpp);
memset (hist, 0, sel_width * img_bpp * sizeof (long));
/*
* collect "histogram" data.
*/
for (ox = sel_x1; ox < sel_x2; ox += tile_width)
{
guchar *rows = src_rows;
cols = sel_x2 - ox;
if (cols > tile_width)
cols = tile_width;
gimp_pixel_rgn_get_rect (&src_rgn, rows, ox, sel_y1, cols, sel_height);
for (y = 0; y < sel_height; y++)
{
long *h = hist + (ox - sel_x1) * img_bpp;
guchar *row_end = rows + cols * img_bpp;
while (rows < row_end)
*h++ += *rows++;
}
if (!do_preview)
gimp_progress_update (progress += progress_inc);
}
/*
* average out histogram
*/
if (TRUE)
{
gint extend = (vals.avg_width / 2) * img_bpp;
for (i = 0; i < MIN (3, img_bpp); i++)
{
long *h = hist - extend + i;
long *c = corr - extend + i;
long sum = 0;
gint cnt = 0;
for (x = -extend; x < sel_width * img_bpp; x += img_bpp)
{
if (x + extend < sel_width * img_bpp)
{
sum += h[ extend]; cnt++;
}
if (x - extend >= 0)
{
sum -= h[-extend]; cnt--;
}
if (x >= 0)
{
if (*h)
*c = ((sum / cnt - *h) << 10) / *h;
else
*c = G_MAXINT;
}
h += img_bpp;
c += img_bpp;
}
}
}
else
{
for (i = 0; i < MIN (3, img_bpp); i++)
{
long *h = hist + i + sel_width * img_bpp - img_bpp;
long *c = corr + i + sel_width * img_bpp - img_bpp;
long i = *h;
do
{
h -= img_bpp;
c -= img_bpp;
if (*h - i > vals.avg_width && i - *h > vals.avg_width)
i = *h;
if (*h)
*c = (i-128) << 10 / *h;
else
*c = G_MAXINT;
}
while (h > hist);
}
}
/*
* remove stripes.
*/
for (ox = sel_x1; ox < sel_x2; ox += tile_width)
{
guchar *rows = src_rows;
cols = sel_x2 - ox;
if (cols > tile_width)
cols = tile_width;
gimp_pixel_rgn_get_rect (&src_rgn, rows, ox, sel_y1, cols, sel_height);
if (!do_preview)
gimp_progress_update (progress += progress_inc);
for (y = 0; y < sel_height; y++)
{
long *c = corr + (ox - sel_x1) * img_bpp;
guchar *row_end = rows + cols * img_bpp;
if (vals.histogram)
while (rows < row_end)
{
*rows = MIN (255, MAX (0, 128 + (*rows * *c >> 10)));
c++; rows++;
}
else
while (rows < row_end)
{
*rows = MIN (255, MAX (0, *rows + (*rows * *c >> 10) ));
c++; rows++;
}
if (do_preview)
preview_draw_row (ox - sel_x1, y, cols, rows - cols * img_bpp);
}
if (!do_preview)
{
gimp_pixel_rgn_set_rect (&dst_rgn, src_rows,
ox, sel_y1, cols, sel_height);
gimp_progress_update (progress += progress_inc);
}
}
g_free (src_rows);
/*
* Update the screen...
*/
if (do_preview)
{
gtk_widget_queue_draw (preview);
}
else
{
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);
}
g_free (hist);
g_free (corr);
}
/*
* 'destripe()' - Destripe an image.
*
*/
static void
destripe (void)
{
destripe_rect (sel_x1, sel_y1, sel_x2, sel_y2, FALSE);
}
static gint
destripe_dialog (void)
{
GtkWidget *dialog;
GtkWidget *abox;
GtkWidget *table;
GtkWidget *ptable;
GtkWidget *frame;
GtkWidget *scrollbar;
GtkWidget *button;
GtkObject *adj;
gboolean run;
gimp_ui_init ("destripe", TRUE);
dialog = gimp_dialog_new (_("Destripe"), "destripe",
NULL, 0,
gimp_standard_help_func, HELP_ID,
GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
GTK_STOCK_OK, GTK_RESPONSE_OK,
NULL);
/*
* Preview window...
*/
frame = gtk_frame_new (_("Preview"));
gtk_container_set_border_width (GTK_CONTAINER (frame), 6);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dialog)->vbox), frame,
TRUE, TRUE, 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);
ptable = gtk_table_new (2, 2, FALSE);
gtk_container_add (GTK_CONTAINER (abox), ptable);
gtk_widget_show (ptable);
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
gtk_table_attach(GTK_TABLE(ptable), frame, 0, 1, 0, 1,
0, 0, 0, 0);
gtk_widget_show (frame);
preview_width = MIN (sel_x2 - sel_x1, PREVIEW_SIZE);
preview_height = MIN (sel_y2 - sel_y1, PREVIEW_SIZE);
preview = gtk_preview_new (GTK_PREVIEW_COLOR);
gtk_preview_size (GTK_PREVIEW (preview), preview_width, preview_height);
gtk_container_add (GTK_CONTAINER (frame), preview);
gtk_widget_show (preview);
hscroll_data = gtk_adjustment_new (0, 0, sel_x2 - sel_x1 - 1, 1.0,
MIN (preview_width, sel_x2 - sel_x1),
MIN (preview_width, sel_x2 - sel_x1));
g_signal_connect (hscroll_data, "value_changed",
G_CALLBACK (preview_scroll_callback),
NULL);
scrollbar = gtk_hscrollbar_new (GTK_ADJUSTMENT (hscroll_data));
gtk_range_set_update_policy (GTK_RANGE (scrollbar), GTK_UPDATE_CONTINUOUS);
gtk_table_attach (GTK_TABLE (ptable), scrollbar, 0, 1, 1, 2,
GTK_FILL, 0, 0, 0);
gtk_widget_show (scrollbar);
vscroll_data = gtk_adjustment_new (0, 0, sel_y2 - sel_y1 - 1, 1.0,
MIN (preview_height, sel_y2 - sel_y1),
MIN (preview_height, sel_y2 - sel_y1));
g_signal_connect (vscroll_data, "value_changed",
G_CALLBACK (preview_scroll_callback),
NULL);
scrollbar = gtk_vscrollbar_new (GTK_ADJUSTMENT (vscroll_data));
gtk_range_set_update_policy (GTK_RANGE (scrollbar), GTK_UPDATE_CONTINUOUS);
gtk_table_attach (GTK_TABLE (ptable), scrollbar, 1, 2, 0, 1, 0,
GTK_FILL, 0, 0);
gtk_widget_show (scrollbar);
preview_init ();
/*
* Filter type controls...
*/
frame = gtk_frame_new (_("Parameter Settings"));
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dialog)->vbox), frame,
FALSE, FALSE, 0);
gtk_widget_show (frame);
table = gtk_table_new (2, 3, FALSE);
gtk_table_set_col_spacings (GTK_TABLE (table), 4);
gtk_table_set_row_spacings (GTK_TABLE (table), 4);
gtk_container_set_border_width (GTK_CONTAINER (table), 4);
gtk_container_add (GTK_CONTAINER (frame), table);
gtk_widget_show (table);
button = gtk_check_button_new_with_mnemonic (_("Create _Histogram"));
gtk_table_attach_defaults (GTK_TABLE (table), button, 0, 3, 0, 1);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button), vals.histogram);
gtk_widget_show (button);
g_signal_connect (button, "toggled",
G_CALLBACK (gimp_toggle_button_update),
&vals.histogram);
g_signal_connect (button, "toggled",
G_CALLBACK (preview_update),
NULL);
/*
* Box size (radius) control...
*/
adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 1,
_("_Width:"), SCALE_WIDTH, 0,
vals.avg_width, 2, MAX_AVG, 1, 10, 0,
TRUE, 0, 0,
NULL, NULL);
g_signal_connect (adj, "value_changed",
G_CALLBACK (gimp_int_adjustment_update),
&vals.avg_width);
g_signal_connect (adj, "value_changed",
G_CALLBACK (preview_update),
NULL);
gtk_widget_show (dialog);
preview_update ();
run = (gimp_dialog_run (GIMP_DIALOG (dialog)) == GTK_RESPONSE_OK);
gtk_widget_destroy (dialog);
return run;
}
/* preview functions */
static void
preview_init (void)
{
gint width; /* Byte width of the image */
/*
* Setup for preview filter...
*/
width = preview_width * img_bpp;
preview_x1 = sel_x1;
preview_y1 = sel_y1;
preview_x2 = preview_x1 + MIN (preview_width, sel_x2 - sel_x1);
preview_y2 = preview_y1 + MIN (preview_height, sel_y2 -sel_y1);
}
static void
preview_scroll_callback (void)
{
preview_x1 = sel_x1 + GTK_ADJUSTMENT (hscroll_data)->value;
preview_y1 = sel_y1 + GTK_ADJUSTMENT (vscroll_data)->value;
preview_x2 = preview_x1 + MIN (preview_width, sel_x2 - sel_x1);
preview_y2 = preview_y1 + MIN (preview_height, sel_y2 - sel_y1);
preview_update ();
}
static void
preview_update (void)
{
destripe_rect (preview_x1, preview_y1, preview_x2, preview_y2, TRUE);
}
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