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gimp/plug-ins/threshold_alpha/threshold_alpha.c

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/* threshold_alpha.c -- This is a plug-in for the GIMP (1.0's API)
* Author: Shuji Narazaki <narazaki@InetQ.or.jp>
* Time-stamp: <1997/06/08 22:34:26 narazaki@InetQ.or.jp>
* Version: 0.13
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "gtk/gtk.h"
#include "libgimp/gimp.h"
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
/* Replace them with the right ones */
#define PLUG_IN_NAME "plug_in_threshold_alpha"
#define SHORT_NAME "threshold_alpha"
#define PROGRESS_NAME "threshold_alpha (0.13):coloring transparency..."
#define MENU_POSITION "<Image>/Image/Alpha/Threshold Alpha"
#define MAIN_FUNCTION threshold_alpha
/* you need not change the following names */
#define INTERFACE threshold_alpha_interface
#define DIALOG threshold_alpha_dialog
#define ERROR_DIALOG threshold_alpha_error_dialog
#define VALS threshold_alpha_vals
#define OK_CALLBACK threshold_alpha_ok_callback
static void query (void);
static void run (char *name,
int nparams,
GParam *param,
int *nreturn_vals,
GParam **return_vals);
static GStatusType MAIN_FUNCTION ();
static gint DIALOG ();
static void ERROR_DIALOG (gint gtk_was_not_initialized, guchar *message);
static void
OK_CALLBACK (GtkWidget *widget, gpointer data);
/* gtkWrapper functions */
#define PROGRESS_UPDATE_NUM 100
#define ENTRY_WIDTH 100
#define SCALE_WIDTH 120
/*
static void
gtkW_gint_update (GtkWidget *widget, gpointer data);
static void
gtkW_scale_update (GtkAdjustment *adjustment, double *data);
*/
static void
gtkW_close_callback (GtkWidget *widget, gpointer data);
/*
static void
gtkW_toggle_update (GtkWidget *widget, gpointer data);
*/
static void
gtkW_iscale_update (GtkAdjustment *adjustment,
gpointer data);
static void
gtkW_ientry_update (GtkWidget *widget,
gpointer data);
static GtkWidget *
gtkW_dialog_new (char *name,
GtkSignalFunc ok_callback,
GtkSignalFunc close_callback);
static GtkWidget *
gtkW_error_dialog_new (char * name);
/*
static void
gtkW_table_add_toggle (GtkWidget *table,
gchar *name,
gint x1,
gint x2,
gint y,
GtkSignalFunc update,
gint *value);
*/
/*
static GSList *
gtkW_vbox_add_radio_button (GtkWidget *vbox,
gchar *name,
GSList *group,
GtkSignalFunc update,
gint *value);
*/
/*
static void
gtkW_table_add_gint (GtkWidget *table,
gchar *name,
gint x,
gint y,
GtkSignalFunc update,
gint *value,
gchar *buffer);
*/
/*
static void
gtkW_table_add_scale (GtkWidget *table,
gchar *name,
gint x1,
gint y,
GtkSignalFunc update,
gdouble *value,
gdouble min,
gdouble max,
gdouble step);
*/
static void
gtkW_table_add_iscale_entry (GtkWidget *table,
gchar *name,
gint x,
gint y,
GtkSignalFunc scale_update,
GtkSignalFunc entry_update,
gint *value,
gdouble min,
gdouble max,
gdouble step,
gchar *buffer);
GtkWidget *gtkW_check_button_new (GtkWidget *parent,
gchar *name,
GtkSignalFunc update,
gint *value);
GtkWidget *gtkW_frame_new (GtkWidget *parent, gchar *name);
GtkWidget *gtkW_table_new (GtkWidget *parent, gint col, gint row);
GtkWidget *gtkW_hbox_new (GtkWidget *parent);
GtkWidget *gtkW_vbox_new (GtkWidget *parent);
GPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run, /* run_proc */
};
typedef struct
{
gint threshold;
} ValueType;
static ValueType VALS =
{
127
};
typedef struct
{
gint run;
} Interface;
static Interface INTERFACE = { FALSE };
MAIN ()
static void
query ()
{
static GParamDef args [] =
{
{ PARAM_INT32, "run_mode", "Interactive, non-interactive"},
{ PARAM_IMAGE, "image", "Input image (not used)"},
{ PARAM_DRAWABLE, "drawable", "Input drawable" },
{ PARAM_INT32, "threshold", "Threshold" },
};
static GParamDef *return_vals = NULL;
static int nargs = sizeof (args) / sizeof (args[0]);
static int nreturn_vals = 0;
gimp_install_procedure (PLUG_IN_NAME,
"",
"",
"Shuji Narazaki (narazaki@InetQ.or.jp)",
"Shuji Narazaki",
"1997",
MENU_POSITION,
"RGBA,GRAYA",
PROC_PLUG_IN,
nargs, nreturn_vals,
args, return_vals);
}
static void
run (char *name,
int nparams,
GParam *param,
int *nreturn_vals,
GParam **return_vals)
{
static GParam values[1];
GStatusType status = STATUS_EXECUTION_ERROR;
GRunModeType run_mode;
gint drawable_id;
run_mode = param[0].data.d_int32;
drawable_id = param[2].data.d_int32;
*nreturn_vals = 1;
*return_vals = values;
values[0].type = PARAM_STATUS;
values[0].data.d_status = status;
switch (run_mode)
{
case RUN_INTERACTIVE:
/* Since a channel might be selected, we must check wheter RGB or not. */
if (gimp_layer_get_preserve_transparency (drawable_id))
{
ERROR_DIALOG (1, "The layer preserves transparency.");
return;
}
if (!gimp_drawable_color (drawable_id))
{
ERROR_DIALOG (1, "RGB drawable is not selected.");
return;
}
gimp_get_data (PLUG_IN_NAME, &VALS);
if (! DIALOG ())
return;
break;
case RUN_NONINTERACTIVE:
if (nparams != 4)
status = STATUS_CALLING_ERROR;
if (status == STATUS_SUCCESS)
{
VALS.threshold = param[3].data.d_int32;
}
break;
case RUN_WITH_LAST_VALS:
gimp_get_data (PLUG_IN_NAME, &VALS);
break;
}
status = MAIN_FUNCTION (drawable_id);
if (run_mode != RUN_NONINTERACTIVE)
gimp_displays_flush();
if (run_mode == RUN_INTERACTIVE && status == STATUS_SUCCESS )
gimp_set_data (PLUG_IN_NAME, &VALS, sizeof (ValueType));
values[0].type = PARAM_STATUS;
values[0].data.d_status = status;
}
static GStatusType
MAIN_FUNCTION (gint32 drawable_id)
{
GDrawable *drawable;
GPixelRgn 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);
if (! gimp_drawable_has_alpha (drawable_id)) return STATUS_EXECUTION_ERROR;
gap = 3;
gimp_drawable_mask_bounds (drawable_id, &x1, &y1, &x2, &y2);
total = (x2 - x1) * (y2 - y1);
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);
pr = gimp_pixel_rgns_register (2, &src_rgn, &dest_rgn);
gimp_progress_init (PROGRESS_NAME);
for (; pr != NULL; pr = gimp_pixel_rgns_process (pr))
{
int offset, index;
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++)
{
for (index = 0; index < gap; index++)
*dest++ = *src++;
*dest++ = (VALS.threshold < *src++) ? 255 : 0;
if ((++processed % (total / PROGRESS_UPDATE_NUM)) == 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 STATUS_SUCCESS;
}
/* dialog stuff */
static int
DIALOG ()
{
GtkWidget *dlg;
GtkWidget *hbox;
GtkWidget *frame;
GtkWidget *table;
gchar **argv;
gint argc;
argc = 1;
argv = g_new (gchar *, 1);
argv[0] = g_strdup (PLUG_IN_NAME);
gtk_init (&argc, &argv);
gtk_rc_parse (gimp_gtkrc ());
dlg = gtkW_dialog_new (PLUG_IN_NAME,
(GtkSignalFunc) OK_CALLBACK,
(GtkSignalFunc) gtkW_close_callback);
hbox = gtkW_hbox_new ((GTK_DIALOG (dlg)->vbox));
frame = gtkW_frame_new (hbox, "Parameter Settings");
table = gtkW_table_new (frame, 2, 2);
gtkW_table_add_iscale_entry (table, "Threshold", 0, 0,
(GtkSignalFunc) gtkW_iscale_update,
(GtkSignalFunc) gtkW_ientry_update,
&VALS.threshold,
0, 255, 1, malloc (10));
gtk_widget_show (dlg);
gtk_main ();
gdk_flush ();
return INTERFACE.run;
}
static void
ERROR_DIALOG (gint gtk_was_not_initialized, guchar *message)
{
GtkWidget *dlg;
GtkWidget *table;
GtkWidget *label;
gchar **argv;
gint argc;
if (gtk_was_not_initialized)
{
argc = 1;
argv = g_new (gchar *, 1);
argv[0] = g_strdup (PLUG_IN_NAME);
gtk_init (&argc, &argv);
gtk_rc_parse (gimp_gtkrc ());
}
dlg = gtkW_error_dialog_new (PLUG_IN_NAME);
table = gtk_table_new (1,1, FALSE);
gtk_container_border_width (GTK_CONTAINER (table), 10);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dlg)->vbox), table, TRUE, TRUE, 0);
label = gtk_label_new (message);
gtk_table_attach (GTK_TABLE (table), label, 0, 1, 0, 1, GTK_FILL|GTK_EXPAND,
0, 0, 0);
gtk_widget_show (table);
gtk_widget_show (label);
gtk_widget_show (dlg);
gtk_main ();
gdk_flush ();
}
static void
OK_CALLBACK (GtkWidget *widget,
gpointer data)
{
INTERFACE.run = TRUE;
gtk_widget_destroy (GTK_WIDGET (data));
}
/* VFtext interface functions */
/*
static void
gtkW_gint_update (GtkWidget *widget,
gpointer data)
{
*(gint *)data = (gint)atof (gtk_entry_get_text (GTK_ENTRY (widget)));
}
*/
/*
static void
gtkW_scale_update (GtkAdjustment *adjustment,
gdouble *scale_val)
{
*scale_val = (gdouble) adjustment->value;
}
*/
static void
gtkW_close_callback (GtkWidget *widget,
gpointer data)
{
gtk_main_quit ();
}
/*
static void
gtkW_toggle_update (GtkWidget *widget,
gpointer data)
{
int *toggle_val;
toggle_val = (int *) data;
if (GTK_TOGGLE_BUTTON (widget)->active)
*toggle_val = TRUE;
else
*toggle_val = FALSE;
}
*/
/* gtkW is the abbreviation of gtk Wrapper */
static GtkWidget *
gtkW_dialog_new (char * name,
GtkSignalFunc ok_callback,
GtkSignalFunc close_callback)
{
GtkWidget *dlg, *button;
dlg = gtk_dialog_new ();
gtk_window_set_title (GTK_WINDOW (dlg), name);
gtk_window_position (GTK_WINDOW (dlg), GTK_WIN_POS_MOUSE);
gtk_signal_connect (GTK_OBJECT (dlg), "destroy",
(GtkSignalFunc) close_callback, NULL);
/* Action Area */
button = gtk_button_new_with_label ("OK");
GTK_WIDGET_SET_FLAGS (button, GTK_CAN_DEFAULT);
gtk_signal_connect (GTK_OBJECT (button), "clicked",
(GtkSignalFunc) ok_callback, dlg);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dlg)->action_area), button,
TRUE, TRUE, 0);
gtk_widget_grab_default (button);
gtk_widget_show (button);
button = gtk_button_new_with_label ("Cancel");
GTK_WIDGET_SET_FLAGS (button, GTK_CAN_DEFAULT);
gtk_signal_connect_object (GTK_OBJECT (button), "clicked",
(GtkSignalFunc) gtk_widget_destroy,
GTK_OBJECT(dlg));
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dlg)->action_area), button,
TRUE, TRUE, 0);
gtk_widget_show (button);
return dlg;
}
static GtkWidget *
gtkW_error_dialog_new (char * name)
{
GtkWidget *dlg, *button;
dlg = gtk_dialog_new ();
gtk_window_set_title (GTK_WINDOW (dlg), name);
gtk_window_position (GTK_WINDOW (dlg), GTK_WIN_POS_MOUSE);
gtk_signal_connect (GTK_OBJECT (dlg), "destroy",
(GtkSignalFunc) gtkW_close_callback, NULL);
/* Action Area */
button = gtk_button_new_with_label ("OK");
GTK_WIDGET_SET_FLAGS (button, GTK_CAN_DEFAULT);
gtk_signal_connect (GTK_OBJECT (button), "clicked",
(GtkSignalFunc) gtkW_close_callback, dlg);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dlg)->action_area), button,
TRUE, TRUE, 0);
gtk_widget_grab_default (button);
gtk_widget_show (button);
return dlg;
}
GtkWidget *
gtkW_table_new (GtkWidget *parent, gint col, gint row)
{
GtkWidget *table;
table = gtk_table_new (col,row, FALSE);
gtk_container_border_width (GTK_CONTAINER (table), 10);
gtk_container_add (GTK_CONTAINER (parent), table);
gtk_widget_show (table);
return table;
}
GtkWidget *
gtkW_hbox_new (GtkWidget *parent)
{
GtkWidget *hbox;
hbox = gtk_hbox_new (FALSE, 5);
gtk_container_border_width (GTK_CONTAINER (hbox), 5);
gtk_box_pack_start (GTK_BOX (parent), hbox, FALSE, TRUE, 0);
gtk_widget_show (hbox);
return hbox;
}
GtkWidget *
gtkW_vbox_new (GtkWidget *parent)
{
GtkWidget *vbox;
vbox = gtk_vbox_new (FALSE, 5);
gtk_container_border_width (GTK_CONTAINER (vbox), 10);
/* gtk_box_pack_start (GTK_BOX (parent), vbox, TRUE, TRUE, 0); */
gtk_container_add (GTK_CONTAINER (parent), vbox);
gtk_widget_show (vbox);
return vbox;
}
GtkWidget *
gtkW_check_button_new (GtkWidget *parent,
gchar *name,
GtkSignalFunc update,
gint *value)
{
GtkWidget *toggle;
toggle = gtk_check_button_new_with_label (name);
gtk_signal_connect (GTK_OBJECT (toggle), "toggled",
(GtkSignalFunc) update,
value);
gtk_toggle_button_set_state (GTK_TOGGLE_BUTTON (toggle), *value);
gtk_container_add (GTK_CONTAINER (parent), toggle);
gtk_widget_show (toggle);
return toggle;
}
GtkWidget *
gtkW_frame_new (GtkWidget *parent,
gchar *name)
{
GtkWidget *frame;
frame = gtk_frame_new (name);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN);
gtk_container_border_width (GTK_CONTAINER (frame), 5);
gtk_box_pack_start (GTK_BOX(parent), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
return frame;
}
/*
static void
gtkW_table_add_toggle (GtkWidget *table,
gchar *name,
gint x1,
gint x2,
gint y,
GtkSignalFunc update,
gint *value)
{
GtkWidget *toggle;
toggle = gtk_check_button_new_with_label(name);
gtk_table_attach (GTK_TABLE (table), toggle, x1, x2, y, y+1,
GTK_FILL|GTK_EXPAND, 0, 0, 0);
gtk_signal_connect (GTK_OBJECT (toggle), "toggled",
(GtkSignalFunc) update,
value);
gtk_toggle_button_set_state (GTK_TOGGLE_BUTTON (toggle), *value);
gtk_widget_show (toggle);
}
*/
/*
static GSList *
gtkW_vbox_add_radio_button (GtkWidget *vbox,
gchar *name,
GSList *group,
GtkSignalFunc update,
gint *value)
{
GtkWidget *toggle;
toggle = gtk_radio_button_new_with_label(group, name);
group = gtk_radio_button_group (GTK_RADIO_BUTTON (toggle));
gtk_box_pack_start (GTK_BOX (vbox), toggle, FALSE, FALSE, 0);
gtk_signal_connect (GTK_OBJECT (toggle), "toggled",
(GtkSignalFunc) update, value);
gtk_toggle_button_set_state (GTK_TOGGLE_BUTTON (toggle), *value);
gtk_widget_show (toggle);
return group;
}
*/
/*
static void
gtkW_table_add_gint (GtkWidget *table,
gchar *name,
gint x,
gint y,
GtkSignalFunc update,
gint *value,
gchar *buffer)
{
GtkWidget *label, *entry;
label = gtk_label_new (name);
gtk_misc_set_alignment (GTK_MISC(label), 0.0, 0.5);
gtk_table_attach (GTK_TABLE(table), label, x, x+1, y, y+1,
GTK_FILL|GTK_EXPAND, GTK_FILL, 5, 0);
gtk_widget_show(label);
entry = gtk_entry_new();
gtk_table_attach (GTK_TABLE(table), entry, x+1, x+2, y, y+1,
GTK_FILL|GTK_EXPAND, GTK_FILL, 10, 0);
gtk_widget_set_usize (entry, ENTRY_WIDTH, 0);
sprintf (buffer, "%d", *(gint *)value);
gtk_entry_set_text (GTK_ENTRY (entry), buffer);
gtk_signal_connect (GTK_OBJECT (entry), "changed",
(GtkSignalFunc) update, value);
gtk_widget_show(entry);
}
*/
/*
static void
gtkW_table_add_scale (GtkWidget *table,
gchar *name,
gint x,
gint y,
GtkSignalFunc update,
gdouble *value,
gdouble min,
gdouble max,
gdouble step)
{
GtkObject *scale_data;
GtkWidget *label, *scale;
label = gtk_label_new (name);
gtk_misc_set_alignment (GTK_MISC(label), 0.0, 0.5);
gtk_table_attach (GTK_TABLE(table), label, x, x+1, y, y+1,
GTK_FILL|GTK_EXPAND, GTK_FILL, 5, 0);
gtk_widget_show (label);
scale_data = gtk_adjustment_new (*value, min, max, step, step, 0.0);
scale = gtk_hscale_new (GTK_ADJUSTMENT (scale_data));
gtk_widget_set_usize (scale, SCALE_WIDTH, 0);
gtk_table_attach (GTK_TABLE (table), scale, x+1, x+2, y, y+1,
GTK_FILL|GTK_EXPAND, GTK_FILL, 10, 5);
gtk_scale_set_value_pos (GTK_SCALE (scale), GTK_POS_TOP);
gtk_scale_set_digits (GTK_SCALE (scale), 2);
gtk_range_set_update_policy (GTK_RANGE (scale), GTK_UPDATE_DELAYED);
gtk_signal_connect (GTK_OBJECT (scale_data), "value_changed",
(GtkSignalFunc) update, value);
gtk_widget_show (label);
gtk_widget_show (scale);
}
*/
static void
gtkW_table_add_iscale_entry (GtkWidget *table,
gchar *name,
gint x,
gint y,
GtkSignalFunc scale_update,
GtkSignalFunc entry_update,
gint *value,
gdouble min,
gdouble max,
gdouble step,
gchar *buffer)
{
GtkObject *adjustment;
GtkWidget *label, *hbox, *scale, *entry;
label = gtk_label_new (name);
gtk_misc_set_alignment (GTK_MISC(label), 0.0, 0.5);
gtk_table_attach (GTK_TABLE(table), label, x, x+1, y, y+1,
GTK_FILL|GTK_EXPAND, GTK_FILL, 5, 0);
gtk_widget_show (label);
hbox = gtk_hbox_new (FALSE, 5);
gtk_table_attach (GTK_TABLE (table), hbox, x+1, x+2, y, y+1,
GTK_EXPAND | GTK_FILL, GTK_EXPAND | GTK_FILL, 0, 0);
adjustment = gtk_adjustment_new (*value, min, max, step, step, 0.0);
gtk_widget_show (hbox);
scale = gtk_hscale_new (GTK_ADJUSTMENT (adjustment));
gtk_widget_set_usize (scale, SCALE_WIDTH, 0);
gtk_box_pack_start (GTK_BOX (hbox), scale, TRUE, TRUE, 0);
gtk_scale_set_value_pos (GTK_SCALE (scale), GTK_POS_TOP);
gtk_scale_set_digits (GTK_SCALE (scale), 0);
gtk_range_set_update_policy (GTK_RANGE (scale), GTK_UPDATE_DELAYED);
gtk_signal_connect (GTK_OBJECT (adjustment), "value_changed",
(GtkSignalFunc) scale_update, value);
entry = gtk_entry_new ();
gtk_object_set_user_data (GTK_OBJECT (entry), adjustment);
gtk_object_set_user_data (adjustment, entry);
gtk_box_pack_start (GTK_BOX (hbox), entry, TRUE, TRUE, 0);
gtk_widget_set_usize (entry, ENTRY_WIDTH/3, 0);
sprintf (buffer, "%d", *value);
gtk_entry_set_text (GTK_ENTRY (entry), buffer);
gtk_signal_connect (GTK_OBJECT (entry), "changed",
(GtkSignalFunc) entry_update, value);
gtk_widget_show (label);
gtk_widget_show (scale);
gtk_widget_show (entry);
}
static void
gtkW_iscale_update (GtkAdjustment *adjustment,
gpointer data)
{
GtkWidget *entry;
gchar buffer[32];
int *val;
val = data;
if (*val != (int) adjustment->value)
{
*val = adjustment->value;
entry = gtk_object_get_user_data (GTK_OBJECT (adjustment));
sprintf (buffer, "%d", (int) adjustment->value);
gtk_entry_set_text (GTK_ENTRY (entry), buffer);
}
}
static void
gtkW_ientry_update (GtkWidget *widget,
gpointer data)
{
GtkAdjustment *adjustment;
int new_val;
int *val;
val = data;
new_val = atoi (gtk_entry_get_text (GTK_ENTRY (widget)));
if (*val != new_val)
{
adjustment = gtk_object_get_user_data (GTK_OBJECT (widget));
if ((new_val >= adjustment->lower) &&
(new_val <= adjustment->upper))
{
*val = new_val;
adjustment->value = new_val;
gtk_signal_emit_by_name (GTK_OBJECT (adjustment), "value_changed");
}
}
}
/* end of threshold_alpha.c */
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