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gimp/plug-ins/illusion/illusion.c

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/*******************************************************************************
illusion.c -- This is a plug-in for the GIMP 1.0
Copyright (C) 1997 Hirotsuna Mizuno
s1041150@u-aizu.ac.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 <stdlib.h>
#include <gtk/gtk.h>
#include <math.h>
#include "libgimp/gimp.h"
#define PLUG_IN_NAME "plug_in_illusion"
#define PLUG_IN_VERSION "v0.7 (Dec. 25 1997)"
#define DIALOG_CAPTION "Illusion"
#ifndef PI
#define PI 3.141592653589793238462643383279
#endif
#ifndef PI_2
#define PI_2 (PI*2)
#endif
/******************************************************************************/
static void query( void );
static void run( char *, int, GParam *, int *, GParam ** );
static void filter( GDrawable *drawable );
static int dialog( void );
/******************************************************************************/
typedef struct {
gint32 division;
} parameter_t;
/******************************************************************************/
GPlugInInfo PLUG_IN_INFO = {
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run, /* run_proc */
};
static parameter_t parameters = {
8
};
static gint image_width;
static gint image_height;
static gint image_bpp;
static gint image_has_alpha;
static gint select_x1;
static gint select_y1;
static gint select_x2;
static gint select_y2;
static gint select_width;
static gint select_height;
static gdouble center_x;
static gdouble center_y;
/******************************************************************************/
MAIN()
/******************************************************************************/
static void query( void )
{
static int nargs = 4;
static GParamDef args[] = {
{ PARAM_INT32, "run_mode", "interactive / non-interactive" },
{ PARAM_IMAGE, "image", "input image" },
{ PARAM_DRAWABLE, "drawable", "input drawable" },
{ PARAM_INT32, "division", "the number of divisions" }
};
static int nreturn_vals = 0;
static GParamDef *return_vals = NULL;
gimp_install_procedure(
PLUG_IN_NAME,
"produce illusion",
"produce illusion",
"Hirotsuna Mizuno <s1041150@u-aizu.ac.jp>",
"Hirotsuna Mizuno",
PLUG_IN_VERSION,
"<Image>/Filters/Map/Illusion",
"RGB*, GRAY*",
PROC_PLUG_IN,
nargs,
nreturn_vals,
args,
return_vals
);
}
/******************************************************************************/
static void run( char *name,
int paramc,
GParam *params,
int *returnc,
GParam **returns )
{
GDrawable *drawable;
GRunModeType run_mode;
static GParam returnv[1];
GStatusType status = STATUS_SUCCESS;
run_mode = params[0].data.d_int32;
drawable = gimp_drawable_get( params[2].data.d_drawable );
*returnc = 1;
*returns = returnv;
/* get the drawable info */
image_width = gimp_drawable_width( drawable->id );
image_height = gimp_drawable_height( drawable->id );
image_bpp = gimp_drawable_bpp( drawable->id );
image_has_alpha = gimp_drawable_has_alpha( drawable->id );
gimp_drawable_mask_bounds( drawable->id,
&select_x1, &select_y1, &select_x2, &select_y2 );
select_width = select_x2 - select_x1;
select_height = select_y2 - select_y1;
center_x = select_x1 + (gdouble)select_width / 2;
center_y = select_y1 + (gdouble)select_height / 2;
/* switch the run mode */
switch( run_mode ){
case RUN_INTERACTIVE:
gimp_get_data( PLUG_IN_NAME, &parameters );
if( ! dialog() ) return;
gimp_set_data( PLUG_IN_NAME, &parameters, sizeof( parameter_t ) );
break;
case RUN_NONINTERACTIVE:
if( paramc != 4 ){
status = STATUS_CALLING_ERROR;
} else {
parameters.division = params[3].data.d_int32;
}
break;
case RUN_WITH_LAST_VALS:
gimp_get_data( PLUG_IN_NAME, &parameters );
break;
}
if( status == STATUS_SUCCESS ){
if( gimp_drawable_color( drawable->id ) ||
gimp_drawable_gray( drawable->id ) ){
gimp_tile_cache_ntiles( 2 * ( drawable->width / gimp_tile_width() + 1 ) );
filter( drawable );
if( run_mode != RUN_NONINTERACTIVE ) gimp_displays_flush ();
} else {
status = STATUS_EXECUTION_ERROR;
}
}
returnv[0].type = PARAM_STATUS;
returnv[0].data.d_status = status;
gimp_drawable_detach( drawable );
}
/******************************************************************************/
static void filter( GDrawable *drawable )
{
GPixelRgn srcPR, destPR;
guchar **pixels;
guchar **destpixels;
gint x, y, b;
gint xx, yy;
gdouble scale, radius, cx, cy, angle, offset;
gimp_pixel_rgn_init( &srcPR, drawable,
0, 0, image_width, image_height, FALSE, FALSE );
gimp_pixel_rgn_init( &destPR, drawable,
0, 0, image_width, image_height, TRUE, TRUE );
pixels = (guchar **)malloc( image_height * sizeof(guchar *) );
destpixels = (guchar **)malloc( image_height * sizeof(guchar *) );
for( y = 0; y < image_height; y++ ){
pixels[y] = (guchar *)malloc( image_width * image_bpp );
destpixels[y] = (guchar *)malloc( image_width * image_bpp );
gimp_pixel_rgn_get_row( &srcPR, pixels[y], 0, y, image_width );
}
/*
for( y = select_y1; y < select_y2; y++ ){
for( x = select_x1; x < select_x2; x++ ){
for( b = 0; b < image_bpp; b++ ){
destpixels[y][x*image_bpp+b] = 0;
}
}
}
*/
gimp_progress_init( PLUG_IN_NAME );
scale = sqrt(select_width*select_width+select_height*select_height) / 2;
offset = (gint)(scale / 2);
for( y = select_y1; y < select_y2; y++ ){
cy = ((gdouble)y - center_y) / scale;
for( x = select_x1; x < select_x2; x++ ){
cx = ((gdouble)x - center_x) / scale;
angle = floor( atan2(cy,cx) * parameters.division / PI_2 )
* PI_2 / parameters.division + ( PI / parameters.division );
radius = sqrt((gdouble)(cx*cx+cy*cy));
xx = x - offset * cos( angle );
yy = y - offset * sin( angle );
if( xx < 0 ) xx = 0;
else if( image_width <= xx ) xx = image_width - 1;
if( yy < 0 ) yy = 0;
else if( image_height <= yy ) yy = image_height - 1;
for( b = 0; b < image_bpp; b++ )
destpixels[y][x*image_bpp+b] =
(1-radius)*pixels[y][x*image_bpp+b]
+ radius*pixels[yy][xx*image_bpp+b];
}
gimp_pixel_rgn_set_row (&destPR, destpixels[y], 0, y, image_width );
gimp_progress_update ( (double)( y - select_y1 ) / (double)select_height );
}
gimp_drawable_flush( drawable );
gimp_drawable_merge_shadow( drawable->id, TRUE );
gimp_drawable_update( drawable->id,
select_x1, select_y1, select_width, select_height );
for( y = select_y1; y < select_y2; y++ ) free( pixels[y-select_y1] );
free( pixels );
for( y = select_y1; y < select_y2; y++ ) free( destpixels[y-select_y1] );
free( destpixels );
}
/******************************************************************************/
static int dialog_status;
static GtkWidget *entry_division;
static void dialog_destroy_handler( GtkWidget *widget, gpointer *data )
{
gtk_main_quit();
}
static void dialog_ok_handler( GtkWidget *widget, gpointer *data )
{
dialog_status = TRUE;
parameters.division =
(gint32)atof(gtk_entry_get_text( GTK_ENTRY( entry_division ) ) );
gtk_widget_destroy( GTK_WIDGET( data ) );
}
static void dialog_cancel_handler( GtkWidget *widget, gpointer *data )
{
dialog_status = FALSE;
gtk_widget_destroy( GTK_WIDGET( data ) );
}
/******************************************************************************/
static int dialog( void )
{
GtkWidget *window;
dialog_status = FALSE;
{
gint argc = 1;
gchar **argv = g_new( gchar *, 1 );
argv[0] = g_strdup( DIALOG_CAPTION );
gtk_init( &argc, &argv );
}
/* dialog window */
window = gtk_dialog_new();
gtk_signal_connect( GTK_OBJECT( window ), "destroy",
GTK_SIGNAL_FUNC( dialog_destroy_handler ), NULL );
gtk_container_border_width( GTK_CONTAINER( window ), 0 );
gtk_container_border_width( GTK_CONTAINER( GTK_DIALOG( window )->vbox ), 5 );
{
/* buttons */
GtkWidget *button;
/* ok button */
button = gtk_button_new_with_label( "OK" );
gtk_signal_connect_object( GTK_OBJECT( button ), "clicked",
GTK_SIGNAL_FUNC( dialog_ok_handler ),
GTK_OBJECT( window ) );
GTK_WIDGET_SET_FLAGS( button, GTK_CAN_DEFAULT );
gtk_box_pack_start( GTK_BOX( GTK_DIALOG( window )->action_area ),
button, TRUE, TRUE, 0 );
gtk_widget_grab_default( button );
gtk_widget_show( button );
/* cancel button */
button = gtk_button_new_with_label( "Cancel" );
gtk_signal_connect_object( GTK_OBJECT( button ), "clicked",
GTK_SIGNAL_FUNC( dialog_cancel_handler ),
GTK_OBJECT( window )) ;
gtk_box_pack_start( GTK_BOX( GTK_DIALOG( window )->action_area ),
button, TRUE, TRUE, 0 );
gtk_widget_show( button );
}
{
/* text boxes */
GtkWidget *table;
GtkWidget *label;
char buffer[32];
/* table */
table = gtk_table_new( 1, 2, FALSE );
gtk_table_set_row_spacings( GTK_TABLE( table ), 5 );
gtk_table_set_col_spacings( GTK_TABLE( table ), 5 );
gtk_box_pack_start( GTK_BOX( GTK_DIALOG( window )->vbox ),
table, TRUE, TRUE, 0 );
gtk_widget_show( table );
/* tile width */
label = gtk_label_new( "division: " );
entry_division = gtk_entry_new();
sprintf( buffer, "%d", parameters.division );
gtk_entry_set_text( GTK_ENTRY( entry_division ), buffer );
gtk_table_attach_defaults( GTK_TABLE( table ), label, 0, 1, 0, 1 );
gtk_table_attach_defaults( GTK_TABLE( table ), entry_division, 1, 2, 0, 1 );
gtk_widget_show( label );
gtk_widget_show( entry_division );
}
gtk_widget_show( window );
gtk_main();
return dialog_status;
}
/******************************************************************************/
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