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gimp/plug-ins/struc/struc.c

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/*
* This is the Struc 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
/* Don't ask me why its called "Struc". The first .c-file
* just happend to be called struc.c
*
* Some code for the dialog was taken from Motion Blur plug-in for
* GIMP 0.99 by Daniel Skarda (0rfelyus@atrey.karlin.mff.cuni.cz)
*
* Please send any comments or suggestions to me,
* Karl-Johan Andersson (t96kja@student.tdb.uu.se)
*
*/
#include <stdlib.h>
#include <stdio.h>
#include "struc.h"
#include "gtk/gtk.h"
#include "libgimp/gimp.h"
/* --- Typedefs --- */
typedef struct {
gint direction;
gint depth;
} StrucValues;
typedef struct {
gint run;
} StructInterface;
/* --- Declare local functions --- */
static void query (void);
static void run (char *name,
int nparams,
GParam *param,
int *nreturn_vals,
GParam **return_vals);
static gint struc_dialog (void);
static void struc_close_callback (GtkWidget *widget, gpointer data);
static void struc_ok_callback (GtkWidget *widget, gpointer data);
static void struc_scale_update (GtkAdjustment *adjustment, gpointer data);
static void struc_toggle_update (GtkWidget *widget, gint32 value);
static void strucpi (GDrawable *drawable);
/* --- Variables --- */
GPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run, /* run_proc */
};
static StrucValues svals =
{
0, /* direction*/
4 /* depth */
};
static StructInterface s_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, "direction", "Light direction (0 - 3)" },
{ PARAM_INT32, "depth", "Texture depth (1 - 50)" },
};
static GParamDef *return_vals = NULL;
static int nargs = sizeof (args) / sizeof (args[0]);
static int nreturn_vals = 0;
gimp_install_procedure ("plug_in_apply_canvas",
"Adds a canvas texture map to the picture",
"This function applies a canvas texture map to the drawable.",
"Karl-Johan Andersson", /* Author */
"Karl-Johan Andersson", /* Copyright */
"1997",
"<Image>/Filters/Artistic/Apply Canvas",
"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_struc", &svals);
/* First acquire information with a dialog */
if (! struc_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)
{
svals.direction = (gint) param[3].data.d_int32;
svals.depth = (gint) param[4].data.d_int32;
}
if(svals.direction<0 || svals.direction>4)
status = STATUS_CALLING_ERROR;
if(svals.depth<1 || svals.depth>50)
status = STATUS_CALLING_ERROR;
break;
case RUN_WITH_LAST_VALS:
/* Possibly retrieve data */
gimp_get_data ("plug_in_struc", &svals);
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 ("struc");
gimp_tile_cache_ntiles (2 * (drawable->width / gimp_tile_width () + 1));
strucpi (drawable);
if (run_mode != RUN_NONINTERACTIVE)
gimp_displays_flush ();
/* Store data */
if (run_mode == RUN_INTERACTIVE)
gimp_set_data ("plug_in_struc", &svals, sizeof (StrucValues));
}
else
{
/* gimp_message ("struc: cannot operate on indexed color images"); */
status = STATUS_EXECUTION_ERROR;
}
}
values[0].data.d_status = status;
gimp_drawable_detach (drawable);
}
static gint struc_dialog(void)
{
GtkWidget *dlg;
GtkWidget *oframe, *iframe;
GtkWidget *abox, *bbox, *cbox;
GtkWidget *button, *label;
GtkWidget *scale;
GtkObject *adjustment;
gchar **argv;
gint argc;
argc = 1;
argv = g_new (gchar *, 1);
argv[0] = g_strdup("struc");
gtk_init (&argc, &argv);
gtk_rc_parse (gimp_gtkrc ());
dlg = gtk_dialog_new ();
gtk_window_set_title (GTK_WINDOW (dlg), "Struc");
gtk_window_position (GTK_WINDOW (dlg), GTK_WIN_POS_MOUSE);
gtk_container_border_width (GTK_CONTAINER (dlg), 0);
gtk_signal_connect (GTK_OBJECT(dlg), "destroy",
(GtkSignalFunc) struc_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) struc_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 */
abox = gtk_vbox_new (FALSE, 5);
gtk_container_border_width (GTK_CONTAINER (abox), 5);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dlg)->vbox),
abox, FALSE, FALSE, 0);
oframe = gtk_frame_new ("Filter options");
gtk_frame_set_shadow_type (GTK_FRAME (oframe), GTK_SHADOW_ETCHED_IN);
gtk_box_pack_start (GTK_BOX (abox),
oframe, TRUE, TRUE, 0);
bbox = gtk_vbox_new (FALSE, 5);
gtk_container_border_width (GTK_CONTAINER (bbox), 5);
gtk_container_add (GTK_CONTAINER (oframe), bbox);
/* Radio buttons */
iframe = gtk_frame_new ("Direction");
gtk_frame_set_shadow_type (GTK_FRAME (iframe), GTK_SHADOW_ETCHED_IN);
gtk_box_pack_start (GTK_BOX (bbox),
iframe, FALSE, FALSE, 0);
cbox= gtk_vbox_new (FALSE, 5);
gtk_container_border_width (GTK_CONTAINER (cbox), 5);
gtk_container_add (GTK_CONTAINER (iframe), cbox);
{
int i;
char * name[4]= {"Top-right", "Top-left", "Bottom-left", "Bottom-right"};
button = NULL;
for (i=0; i < 4; i++)
{
button = gtk_radio_button_new_with_label (
(button==NULL) ? NULL :
gtk_radio_button_group (GTK_RADIO_BUTTON (button)), name[i]);
gtk_toggle_button_set_state (GTK_TOGGLE_BUTTON (button),
(svals.direction==i));
gtk_signal_connect (GTK_OBJECT (button), "toggled",
(GtkSignalFunc) struc_toggle_update,
(gpointer) i);
gtk_box_pack_start (GTK_BOX (cbox), button, FALSE, FALSE, 0);
gtk_widget_show (button);
}
}
gtk_widget_show(cbox);
gtk_widget_show(iframe);
/* Horizontal scale */
label=gtk_label_new ("Depth");
gtk_misc_set_alignment (GTK_MISC(label), 0.0, 0.5);
gtk_box_pack_start (GTK_BOX(bbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
adjustment = gtk_adjustment_new (svals.depth, 1, 50, 1, 1, 1);
gtk_signal_connect (adjustment, "value_changed",
(GtkSignalFunc) struc_scale_update,
&(svals.depth));
scale= gtk_hscale_new (GTK_ADJUSTMENT (adjustment));
gtk_widget_set_usize (GTK_WIDGET (scale), 150, 30);
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_box_pack_start (GTK_BOX (bbox), scale, FALSE, FALSE,0);
gtk_widget_show (scale );
gtk_widget_show(bbox);
gtk_widget_show(oframe);
gtk_widget_show(abox);
gtk_widget_show(dlg);
gtk_main();
gdk_flush();
return s_int.run;
}
/* Interface functions */
static void struc_close_callback (GtkWidget *widget, gpointer data)
{
gtk_main_quit ();
}
static void struc_ok_callback (GtkWidget *widget, gpointer data)
{
s_int.run = TRUE;
gtk_widget_destroy (GTK_WIDGET (data));
}
static void struc_scale_update (GtkAdjustment *adjustment, gpointer data)
{
gint *dptr = (gint*) data;
*dptr = (gint) adjustment->value;
}
static void struc_toggle_update (GtkWidget *widget, gint32 value)
{
if (GTK_TOGGLE_BUTTON (widget)->active)
svals.direction = value;
}
/* Filter function */
static void strucpi (GDrawable *drawable)
{
GPixelRgn srcPR, destPR;
gint width, height;
gint bytes;
guchar *dest, *d;
guchar *cur_row;
gint row, col, rrow, rcol;
gint x1, y1, x2, y2, varde;
gint xm, ym, offs;
gfloat mult;
/* 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);
/* 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);
mult=(gfloat)svals.depth*0.25;
switch(svals.direction)
{
case 0:
xm=1;
ym=128;
offs=0;
break;
case 1:
xm=-1;
ym=128;
offs=127;
break;
case 2:
xm=128;
ym=1;
offs=0;
break;
case 3:
xm=128;
ym=-1;
offs=128;
break;
default:
xm=1;
ym=128;
offs=0;
break;
}
/* Loop through the rows */
rrow = 0; rcol = 0;
for (row = y1; row < y2; row++)
{
gimp_pixel_rgn_get_row (&srcPR, cur_row, x1, row, (x2-x1));
d = dest;
rcol = 0;
switch (bytes) {
case 1: /* Grayscale */
case 2: /* Grayscale alpha */
for (col = 0; col < (x2 - x1) * bytes; col+=bytes)
{
varde = cur_row[col] + mult*sdata[rcol*xm+rrow*ym+offs];
if (varde > 255 ) varde = 255;
if (varde < 0) varde = 0;
*d++ = (guchar)varde;
if (bytes == 2)
*d++ = cur_row[col+1];
rcol++;
if (rcol == 128) rcol = 0;
}
break;
case 3: /* RGB */
case 4: /* RGB alpha */
for (col = 0; col < (x2 - x1) * bytes; col+=bytes)
{
varde = cur_row[col] + mult*sdata[rcol*xm+rrow*ym+offs];
if (varde > 255 ) varde = 255;
if (varde < 0) varde = 0;
*d++ = (guchar)varde;
varde = cur_row[col+1] + mult*sdata[rcol*xm+rrow*ym+offs];
if (varde > 255 ) varde = 255;
if (varde < 0) varde = 0;
*d++ = (guchar)varde;
varde = cur_row[col+2] + mult*sdata[rcol*xm+rrow*ym+offs];
if (varde > 255 ) varde = 255;
if (varde < 0) varde = 0;
*d++ = (guchar)varde;
if (bytes == 4)
*d++ = cur_row[col+3];
rcol++;
if (rcol == 128) rcol = 0;
}
break;
}
/* store the dest */
gimp_pixel_rgn_set_row (&destPR, dest, x1, row, (x2 - x1));
rrow++;
if (rrow == 128) rrow = 0;
if ((row % 5) == 0)
gimp_progress_update ((double) row / (double) (y2 - y1));
}
/* update the textured 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);
}
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