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gimp/plug-ins/glasstile/glasstile.c

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/*
* This is the Glass Tile plug-in for the GIMP 0.99
* Version 1.01
*
* Copyright (C) 1997 Karl-Johan Andersson (t96kja@student.tdb.uu.se)
*
* 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.
*
*/
/*
* This filter divide the image into square "glass"-blocks in which
* the image is refracted.
*
* The alpha-channel is left unchanged.
*
* Please send any comments or suggestions to
* Karl-Johan Andersson (t96kja@student.tdb.uu.se)
*
*/
#include <stdlib.h>
#include "libgimp/gimp.h"
#include "gtk/gtk.h"
/* --- Typedefs --- */
typedef struct {
gint xblock;
gint yblock;
} GlassValues;
typedef struct {
gint run;
} GlassInterface;
/* --- Declare local functions --- */
static void query (void);
static void run (char *name,
int nparams,
GParam *param,
int *nreturn_vals,
GParam **return_vals);
static gint glass_dialog (void);
static void glass_close_callback (GtkWidget *widget, gpointer data);
static void glass_ok_callback (GtkWidget *widget, gpointer data);
static void glass_scale_update (GtkAdjustment *adjustment, gpointer data);
static void glasstile (GDrawable *drawable);
/* --- Variables --- */
GPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run, /* run_proc */
};
static GlassValues gtvals =
{
20, /* tile width */
20 /* tile height */
};
static GlassInterface gt_int =
{
FALSE /* run */
};
/* --- Functions --- */
MAIN ()
static void query ()
{
static GParamDef args[] =
{
{ PARAM_INT32, "run_mode", "Interactive, non-interactive" },
{ PARAM_IMAGE, "image", "Input image (unused)" },
{ PARAM_DRAWABLE, "drawable", "Input drawable" },
{ PARAM_INT32, "tilex", "Tile width (10 - 50)" },
{ PARAM_INT32, "tiley", "Tile height (10 - 50)" },
};
static GParamDef *return_vals = NULL;
static int nargs = sizeof (args) / sizeof (args[0]);
static int nreturn_vals = 0;
gimp_install_procedure ("plug_in_glasstile",
"Divide the image into square glassblocks",
"More here later",
"Karl-Johan Andersson", /* Author */
"Karl-Johan Andersson", /* Copyright */
"1997",
"<Image>/Filters/Glass Effects/Glass Tile",
"RGB*, GRAY*",
PROC_PLUG_IN,
nargs, nreturn_vals,
args, return_vals);
}
static void run (gchar *name,
gint nparams,
GParam *param,
gint *nreturn_vals,
GParam **return_vals)
{
static GParam values[1];
GDrawable *drawable;
GRunModeType run_mode;
GStatusType status = STATUS_SUCCESS;
run_mode = param[0].data.d_int32;
*nreturn_vals = 1;
*return_vals = values;
values[0].type = PARAM_STATUS;
values[0].data.d_status = status;
/* Get the specified drawable */
drawable = gimp_drawable_get (param[2].data.d_drawable);
switch (run_mode)
{
case RUN_INTERACTIVE:
/* Possibly retrieve data */
gimp_get_data ("plug_in_glasstile", &gtvals);
/* First acquire information with a dialog */
if (! glass_dialog ())
{
gimp_drawable_detach (drawable);
return;
}
break;
case RUN_NONINTERACTIVE:
/* Make sure all the arguments are there! */
if (nparams != 5)
status = STATUS_CALLING_ERROR;
if (status == STATUS_SUCCESS)
{
gtvals.xblock = (gint) param[3].data.d_int32;
gtvals.yblock = (gint) param[4].data.d_int32;
}
if (gtvals.xblock < 10 || gtvals.xblock > 50)
status = STATUS_CALLING_ERROR;
if (gtvals.yblock < 10 || gtvals.yblock > 50)
status = STATUS_CALLING_ERROR;
break;
case RUN_WITH_LAST_VALS:
/* Possibly retrieve data */
gimp_get_data ("plug_in_glasstile", &gtvals);
break;
default:
break;
}
if (status == STATUS_SUCCESS)
{
/* Make sure that the drawable is gray or RGB color */
if (gimp_drawable_color (drawable->id) || gimp_drawable_gray (drawable->id))
{
gimp_progress_init ("Glass Tile...");
gimp_tile_cache_ntiles (2 * (drawable->width / gimp_tile_width () + 1));
glasstile (drawable);
if (run_mode != RUN_NONINTERACTIVE)
gimp_displays_flush ();
/* Store data */
if (run_mode == RUN_INTERACTIVE)
gimp_set_data ("plug_in_glasstile", &gtvals, sizeof (GlassValues));
}
else
{
/* gimp_message ("glasstile: cannot operate on indexed color images"); */
status = STATUS_EXECUTION_ERROR;
}
}
values[0].data.d_status = status;
gimp_drawable_detach (drawable);
}
static gint glass_dialog ()
{
GtkWidget *dlg;
GtkWidget *label;
GtkWidget *button;
GtkWidget *scale;
GtkWidget *frame;
GtkWidget *table;
GtkObject *adjustment;
gchar **argv;
gint argc;
argc = 1;
argv = g_new (gchar *, 1);
argv[0] = g_strdup ("glasstile");
gtk_init (&argc, &argv);
gtk_rc_parse (gimp_gtkrc ());
dlg = gtk_dialog_new ();
gtk_window_set_title (GTK_WINDOW (dlg), "Glass Tile");
gtk_window_position (GTK_WINDOW (dlg), GTK_WIN_POS_MOUSE);
gtk_signal_connect (GTK_OBJECT (dlg), "destroy",
(GtkSignalFunc) glass_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) glass_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);
/* Parameter settings */
frame = gtk_frame_new ("Parameter Settings");
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN);
gtk_container_border_width (GTK_CONTAINER (frame), 10);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dlg)->vbox), frame, TRUE, TRUE, 0);
table = gtk_table_new (2, 2, FALSE); /* table height, width */
gtk_container_border_width (GTK_CONTAINER (table), 10);
gtk_container_add (GTK_CONTAINER (frame), table);
/* Horizontal scale - Width */
label = gtk_label_new ("Tile Width");
gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.5);
gtk_table_attach (GTK_TABLE (table), label, 0, 1, 0, 1, GTK_FILL, 0, 5, 0);
/* xStart, xEnd, yStart, yEnd */
adjustment = gtk_adjustment_new (gtvals.xblock, 10, 50, 1, 1, 0);
gtk_signal_connect (GTK_OBJECT (adjustment), "value_changed",
(GtkSignalFunc) glass_scale_update,
&(gtvals.xblock));
scale = gtk_hscale_new (GTK_ADJUSTMENT (adjustment));
gtk_widget_set_usize (scale, 150, 30);
gtk_table_attach (GTK_TABLE (table), scale, 1, 2, 0, 1, GTK_FILL, 0, 0, 0);
gtk_range_set_update_policy (GTK_RANGE (scale), GTK_UPDATE_DELAYED);
gtk_scale_set_digits (GTK_SCALE (scale), 0);
gtk_scale_set_draw_value (GTK_SCALE (scale), TRUE);
gtk_scale_set_value_pos (GTK_SCALE (scale), GTK_POS_TOP);
gtk_widget_show (label);
gtk_widget_show (scale);
/* Horizontal scale - Height */
label = gtk_label_new ("Tile Height");
gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.5);
gtk_table_attach (GTK_TABLE (table), label, 0, 1, 1, 2, GTK_FILL, 0, 5, 0);
adjustment = gtk_adjustment_new (gtvals.yblock, 10, 50, 1, 1, 0);
gtk_signal_connect (GTK_OBJECT (adjustment), "value_changed",
(GtkSignalFunc) glass_scale_update,
&(gtvals.yblock));
scale = gtk_hscale_new (GTK_ADJUSTMENT (adjustment));
gtk_widget_set_usize (scale, 150, 30);
gtk_table_attach (GTK_TABLE (table), scale, 1, 2, 1, 2, GTK_FILL, 0, 0, 0);
gtk_range_set_update_policy (GTK_RANGE (scale), GTK_UPDATE_DELAYED);
gtk_scale_set_digits (GTK_SCALE (scale), 0);
gtk_scale_set_draw_value (GTK_SCALE (scale), TRUE);
gtk_scale_set_value_pos (GTK_SCALE (scale), GTK_POS_TOP);
gtk_widget_show (label);
gtk_widget_show (scale);
gtk_widget_show (frame);
gtk_widget_show (table);
gtk_widget_show (dlg);
gtk_main ();
gdk_flush ();
return gt_int.run;
}
/* - Interface functions - */
static void glass_close_callback (GtkWidget *widget, gpointer data)
{
gtk_main_quit ();
}
static void glass_ok_callback (GtkWidget *widget, gpointer data)
{
gt_int.run = TRUE;
gtk_widget_destroy (GTK_WIDGET (data));
}
static void glass_scale_update (GtkAdjustment *adjustment, gpointer data)
{
gint *dptr = (gint*) data;
*dptr = (gint) adjustment->value;
}
/* - Filter function - */
static void glasstile (GDrawable *drawable)
{
GPixelRgn srcPR, destPR;
gint width, height;
gint bytes;
guchar *dest, *d, *ad;
guchar *cur_row;
gint row, col, i, iwidth;
gint x1, y1, x2, y2;
gint rutbredd, xpixel1, xpixel2;
gint ruthojd , ypixel2;
gint xhalv, xoffs, xmitt, xplus;
gint yhalv, yoffs, ymitt, yplus, cbytes;
/* Get the input area. This is the bounding box of the selection in
* the image (or the entire image if there is no selection). Only
* operating on the input area is simply an optimization. It doesn't
* need to be done for correct operation. (It simply makes it go
* faster, since fewer pixels need to be operated on).
*/
gimp_drawable_mask_bounds (drawable->id, &x1, &y1, &x2, &y2);
/* Get the size of the input image. (This will/must be the same
* as the size of the output image.
*/
width = drawable->width;
height = drawable->height;
bytes = drawable->bpp;
/* allocate row buffers */
cur_row = (guchar *) malloc ((x2 - x1) * bytes);
dest = (guchar *) malloc ((x2 - x1) * bytes);
ad = (guchar *) malloc ((x2 - x1) * bytes);
/* initialize the pixel regions */
gimp_pixel_rgn_init (&srcPR, drawable, 0, 0, width, height, FALSE, FALSE);
gimp_pixel_rgn_init (&destPR, drawable, 0, 0, width, height, TRUE, TRUE);
rutbredd = gtvals.xblock;
ruthojd = gtvals.yblock;
xhalv = rutbredd / 2;
yhalv = ruthojd / 2;
cbytes = bytes;
if (cbytes%2 == 0) cbytes--;
iwidth = width - x1;
xplus = rutbredd % 2;
yplus = ruthojd % 2;
ymitt = y1;
yoffs = 0;
/* Loop through the rows */
for (row = y1; row < y2; row++)
{
d = dest;
ypixel2 = ymitt + yoffs * 2;
if (ypixel2 < height)
gimp_pixel_rgn_get_row (&srcPR, cur_row, x1, ypixel2, iwidth);
else
gimp_pixel_rgn_get_row (&srcPR, cur_row, x1, y2-1, iwidth);
if (cbytes != bytes) /* Alpha check */
gimp_pixel_rgn_get_row (&srcPR, ad, x1, row, (x2-x1));
yoffs++;
if (yoffs == yhalv) {
ymitt += ruthojd;
yoffs =- yhalv;
yoffs -= yplus;
}
xmitt = 0;
xoffs = 0;
for (col = 0; col < (x2 - x1); col++) /* one pixel */
{
xpixel1 = (xmitt + xoffs) * bytes;
xpixel2 = (xmitt + xoffs * 2) * bytes;
if (xpixel2 < ((x2 - x1) * bytes)) {
for (i = 0; i < cbytes; i++)
d[xpixel1 + i] = cur_row[xpixel2 + i];
}
else {
for (i = 0; i < cbytes; i++)
d[xpixel1 + i]=cur_row[xpixel1 + i];
}
if (cbytes != bytes) /* Alpha channel unchanged */
d[xpixel1 + cbytes] = ad[xpixel1 + cbytes];
xoffs++;
if (xoffs == xhalv) {
xmitt += rutbredd;
xoffs =- xhalv;
xoffs -= xplus;
}
}
/* Store the dest */
gimp_pixel_rgn_set_row (&destPR, dest, x1, row, iwidth);
if ((row % 5) == 0)
gimp_progress_update ((double) row / (double) (y2 - y1));
}
/* Update region */
gimp_drawable_flush (drawable);
gimp_drawable_merge_shadow (drawable->id, TRUE);
gimp_drawable_update (drawable->id, x1, y1, (x2 - x1), (y2 - y1));
free (cur_row);
free (dest);
free (ad);
}
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