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gimp/plug-ins/common/ripple.c

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/* Ripple --- image filter plug-in for The Gimp image manipulation program
* Copyright (C) 1997 Brian Degenhardt
*
* 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.
*
* Please direct all comments, questions, bug reports etc to Brian Degenhardt
* bdegenha@ucsd.edu
*
* You can contact the original The Gimp authors at gimp@xcf.berkeley.edu
*/
#include <math.h>
#include <time.h>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "gtk/gtk.h"
#include "libgimp/gimp.h"
/* Some useful macros */
#define SCALE_WIDTH 200
#define TILE_CACHE_SIZE 16
#define ENTRY_WIDTH 35
#define HORIZONTAL 0
#define VERTICAL 1
#define SMEAR 0
#define WRAP 1
#define BLACK 2
#define SAWTOOTH 0
#define SINE 1
#define TRUE 1
#define FALSE 0
typedef struct {
gint period;
gint amplitude;
gint orientation;
gint edges;
gint waveform;
gint antialias;
gint tile;
} RippleValues;
typedef struct {
gint run;
} RippleInterface;
/* Declare local functions.
*/
static void query (void);
static void run (gchar *name,
gint nparams,
GParam *param,
gint *nreturn_vals,
GParam **return_vals);
static void ripple (GDrawable * drawable);
static gint ripple_dialog (void);
static GTile * ripple_pixel (GDrawable * drawable,
GTile * tile,
gint x1,
gint y1,
gint x2,
gint y2,
gint x,
gint y,
gint * row,
gint * col,
guchar * pixel);
static void ripple_close_callback (GtkWidget *widget,
gpointer data);
static void ripple_ok_callback (GtkWidget *widget,
gpointer data);
static void ripple_toggle_update (GtkWidget *widget,
gpointer data);
static void ripple_ientry_callback (GtkWidget *widget,
gpointer data);
static void ripple_iscale_callback (GtkAdjustment *adjustment,
gpointer data);
static gdouble displace_amount (gint location);
static guchar averagetwo (gdouble location, guchar * v);
static guchar averagefour (gdouble location, guchar *v);
/***** Local vars *****/
GPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run, /* run_proc */
};
static RippleValues rvals =
{
20, /* period */
5, /* amplitude */
HORIZONTAL, /* orientation */
WRAP, /* edges */
SINE, /* waveform */
TRUE, /* antialias */
TRUE /* tile */
};
static RippleInterface rpint =
{
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, "period", "period; number of pixels for one wave to complete" },
{ PARAM_INT32, "amplitude", "amplitude; maximum displacement of wave" },
{ PARAM_INT32, "orientation", "orientation; 0 = Horizontal, 1 = Vertical" },
{ PARAM_INT32, "edges", "edges; 0 = smear, 1 = wrap, 2 = black" },
{ PARAM_INT32, "waveform", "0 = sawtooth, 1 = sine wave" },
{ PARAM_INT32, "antialias", "antialias; True or False" },
{ PARAM_INT32, "tile", "tile; if this is true, the image will retain it's tilability" },
};
static GParamDef *return_vals = NULL;
static gint nargs = sizeof (args) / sizeof (args[0]);
static gint nreturn_vals = 0;
gimp_install_procedure ("plug_in_ripple",
"Ripple the contents of the specified drawable",
"Ripples the pixels of the specified drawable. Each row or colum will be displaced a certain number of pixels coinciding with the given wave form",
"Brian Degenhardt <bdegenha@ucsd.edu>",
"Brian Degenhardt",
"1997",
"<Image>/Filters/Distorts/Ripple",
"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;
/* Get the specified drawable */
drawable = gimp_drawable_get (param[2].data.d_drawable);
*nreturn_vals = 1;
*return_vals = values;
values[0].type = PARAM_STATUS;
values[0].data.d_status = status;
switch (run_mode)
{
case RUN_INTERACTIVE:
/* Possibly retrieve data */
gimp_get_data ("plug_in_ripple", &rvals);
/* First acquire information with a dialog */
if (! ripple_dialog ())
return;
break;
case RUN_NONINTERACTIVE:
/* Make sure all the arguments are there! */
if (nparams != 10)
status = STATUS_CALLING_ERROR;
if (status == STATUS_SUCCESS)
{
rvals.period = param[3].data.d_int32;
rvals.amplitude = param[4].data.d_int32;
rvals.orientation = (param[5].data.d_int32) ? VERTICAL : HORIZONTAL;
rvals.edges = (param[6].data.d_int32);
rvals.waveform = param[7].data.d_int32;
rvals.antialias = (param[8].data.d_int32) ? TRUE : FALSE;
rvals.tile = (param[9].data.d_int32) ? TRUE : FALSE;
}
if (status == STATUS_SUCCESS &&
(rvals.edges < SMEAR || rvals.edges > BLACK))
status = STATUS_CALLING_ERROR;
break;
case RUN_WITH_LAST_VALS:
/* Possibly retrieve data */
gimp_get_data ("plug_in_ripple", &rvals);
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 ("Rippling...");
/* set the tile cache size */
gimp_tile_cache_ntiles (TILE_CACHE_SIZE);
/* run the ripple effect */
ripple (drawable);
if (run_mode != RUN_NONINTERACTIVE)
gimp_displays_flush ();
/* Store data */
if (run_mode == RUN_INTERACTIVE)
gimp_set_data ("plug_in_ripple", &rvals, sizeof (RippleValues));
}
else
{
/* gimp_message ("ripple: cannot operate on indexed color images"); */
status = STATUS_EXECUTION_ERROR;
}
}
values[0].data.d_status = status;
gimp_drawable_detach (drawable);
}
/*****/
static void
ripple (GDrawable *drawable)
{
GPixelRgn dest_rgn;
GTile * tile = NULL;
gint row = -1;
gint col = -1;
gpointer pr;
gint width, height;
gint bytes;
guchar *destline;
guchar *dest;
guchar *otherdest;
guchar pixel[4][4];
gint x1, y1, x2, y2;
gint x, y;
gint progress, max_progress;
gdouble needx, needy;
guchar values[4];
guchar val;
gint xi, yi;
gint k;
/* Get selection area */
gimp_drawable_mask_bounds (drawable->id, &x1, &y1, &x2, &y2);
width = drawable->width;
height = drawable->height;
bytes = drawable->bpp;
if ( rvals.tile )
{
rvals.edges = WRAP;
rvals.period = width/(width/rvals.period)*(rvals.orientation==HORIZONTAL) + height/(height/rvals.period)*(rvals.orientation==VERTICAL);
}
progress = 0;
max_progress = (x2 - x1) * (y2 - y1);
/* Ripple the image. It's a pretty simple algorithm. If horizontal
is selected, then every row is displaced a number of pixels that
follows the pattern of the waveform selected. The effect is
just reproduced with columns if vertical is selected.
*/
gimp_pixel_rgn_init (&dest_rgn, drawable, x1, y1, (x2 - x1), (y2 - y1), TRUE, TRUE);
for (pr = gimp_pixel_rgns_register (1, &dest_rgn); pr != NULL; pr = gimp_pixel_rgns_process (pr))
{
if (rvals.orientation == VERTICAL)
{
destline = dest_rgn.data;
for (x = dest_rgn.x; x < (dest_rgn.x + dest_rgn.w); x++)
{
dest = destline;
for (y = dest_rgn.y; y < (dest_rgn.y + dest_rgn.h); y++)
{
otherdest = dest;
needy = y + displace_amount(x);
yi = floor(needy);
/* Tile the image. */
if (rvals.edges == WRAP)
{
needy = fmod(needy + height, height);
yi = (yi + height) % height;
}
/* Smear out the edges of the image by repeating pixels. */
else if (rvals.edges == SMEAR)
{
if (yi < 0)
yi = 0;
else if (yi > height - 1)
yi = height - 1;
}
if ( rvals.antialias)
{
if (yi == height - 1)
{
tile = ripple_pixel (drawable, tile, x1, y1, x2, y2, x, yi, &row, &col, pixel[0]);
for (k = 0; k < bytes; k++)
*otherdest++ = pixel[0][k];
}
else if (needy < 0 && needy > -1)
{
tile = ripple_pixel (drawable, tile, x1, y1, x2, y2, x, 0, &row, &col, pixel[0]);
for (k = 0; k < bytes; k++)
*otherdest++ = pixel[0][k];
}
else if (yi == height - 2 || yi == 0)
{
tile = ripple_pixel (drawable, tile, x1, y1, x2, y2, x, yi, &row, &col, pixel[0]);
tile = ripple_pixel (drawable, tile, x1, y1, x2, y2, x, yi + 1, &row, &col, pixel[1]);
for (k = 0; k < bytes; k++)
{
values[0] = pixel[0][k];
values[1] = pixel[1][k];
val = averagetwo(needy, values);
*otherdest++ = val;
} /* for */
}
else
{
tile = ripple_pixel (drawable, tile, x1, y1, x2, y2, x, yi, &row, &col, pixel[0]);
tile = ripple_pixel (drawable, tile, x1, y1, x2, y2, x, yi + 1, &row, &col, pixel[1]);
tile = ripple_pixel (drawable, tile, x1, y1, x2, y2, x, yi - 1, &row, &col, pixel[2]);
tile = ripple_pixel (drawable, tile, x1, y1, x2, y2, x, yi + 2, &row, &col, pixel[3]);
for (k = 0; k < bytes; k++)
{
values[0] = pixel[0][k];
values[1] = pixel[1][k];
values[2] = pixel[2][k];
values[3] = pixel[3][k];
val = averagefour(needy, values);
*otherdest++ = val;
} /* for */
} /* else */
} /* antialias */
else
{
tile = ripple_pixel (drawable, tile, x1, y1, x2, y2, x, yi, &row, &col, pixel[0]);
for (k = 0; k < bytes; k++)
*otherdest++ = pixel[0][k];
}
dest += dest_rgn.rowstride;
} /* for */
for (k = 0; k < bytes; k++)
destline++;
} /* for */
progress += dest_rgn.w * dest_rgn.h;
gimp_progress_update ((double) progress / (double) max_progress);
}
else /* HORIZONTAL */
{
destline = dest_rgn.data;
for (y = dest_rgn.y; y < (dest_rgn.y + dest_rgn.h); y++)
{
dest = destline;
for (x = dest_rgn.x; x < (dest_rgn.x + dest_rgn.w); x++)
{
needx = x + displace_amount(y);
xi = floor(needx);
/* Tile the image. */
if (rvals.edges == WRAP)
{
needx = fmod((needx + width), width);
xi = (xi + width) % width;
}
/* Smear out the edges of the image by repeating pixels. */
else if (rvals.edges == SMEAR)
{
if (xi < 0)
xi = 0;
else if (xi > width - 1)
xi = width - 1;
}
if ( rvals.antialias)
{
if (xi == width - 1)
{
tile = ripple_pixel (drawable, tile, x1, y1, x2, y2, xi, y, &row, &col, pixel[0]);
for (k = 0; k < bytes; k++)
*dest++ = pixel[0][k];
}
else if (floor(needx) == -1)
{
tile = ripple_pixel (drawable, tile, x1, y1, x2, y2, 0, y, &row, &col, pixel[0]);
for (k = 0; k < bytes; k++)
*dest++ = pixel[0][k];
}
else if (xi == width - 2 || xi == 0)
{
tile = ripple_pixel (drawable, tile, x1, y1, x2, y2, xi, y, &row, &col, pixel[0]);
tile = ripple_pixel (drawable, tile, x1, y1, x2, y2, xi + 1, y, &row, &col, pixel[1]);
for (k = 0; k < bytes; k++)
{
values[0] = pixel[0][k];
values[1] = pixel[1][k];
val = averagetwo(needx, values);
*dest++ = val;
} /* for */
}
else
{
tile = ripple_pixel (drawable, tile, x1, y1, x2, y2, xi, y, &row, &col, pixel[0]);
tile = ripple_pixel (drawable, tile, x1, y1, x2, y2, xi + 1, y, &row, &col, pixel[1]);
tile = ripple_pixel (drawable, tile, x1, y1, x2, y2, xi - 1 , y, &row, &col, pixel[2]);
tile = ripple_pixel (drawable, tile, x1, y1, x2, y2, xi + 2, y, &row, &col, pixel[3]);
for (k = 0; k < bytes; k++)
{
values[0] = pixel[0][k];
values[1] = pixel[1][k];
values[2] = pixel[2][k];
values[3] = pixel[3][k];
val = averagefour(needx, values);
*dest++ = val;
} /* for */
} /* else */
} /* antialias */
else
{
tile = ripple_pixel (drawable, tile, x1, y1, x2, y2, xi, y, &row, &col, pixel[0]);
for (k = 0; k < bytes; k++)
*dest++ = pixel[0][k];
}
} /* for */
destline += dest_rgn.rowstride;
} /* for */
progress += dest_rgn.w * dest_rgn.h;
gimp_progress_update ((double) progress / (double) max_progress);
}
} /* for */
if (tile)
gimp_tile_unref (tile, FALSE);
/* update the region */
gimp_drawable_flush (drawable);
gimp_drawable_merge_shadow (drawable->id, TRUE);
gimp_drawable_update (drawable->id, x1, y1, (x2 - x1), (y2 - y1));
} /* ripple */
static gint
ripple_dialog ()
{
GtkWidget *dlg;
GtkWidget *label;
GtkWidget *button;
GtkWidget *toggle;
GtkWidget *scale;
GtkWidget *hbox;
GtkWidget *entry;
GtkWidget *toggle_vbox;
GtkWidget *main_vbox;
GtkWidget *frame;
GtkWidget *table;
GtkObject *scale_data;
GSList *orientation_group = NULL;
GSList *edges_group = NULL;
GSList *waveform_group = NULL;
guchar *color_cube;
gchar **argv;
gchar buffer[32];
gint argc;
gint do_horizontal = (rvals.orientation == HORIZONTAL);
gint do_vertical = (rvals.orientation == VERTICAL);
gint do_smear = (rvals.edges == SMEAR);
gint do_wrap = (rvals.edges == WRAP);
gint do_black = (rvals.edges == BLACK);
gint do_sawtooth = (rvals.waveform == SAWTOOTH);
gint do_sine = (rvals.waveform == SINE);
argc = 1;
argv = g_new (gchar *, 1);
argv[0] = g_strdup ("ripple");
gtk_init (&argc, &argv);
gtk_rc_parse (gimp_gtkrc ());
gtk_preview_set_gamma (gimp_gamma ());
gtk_preview_set_install_cmap (gimp_install_cmap ());
color_cube = gimp_color_cube ();
gtk_preview_set_color_cube (color_cube[0], color_cube[1],
color_cube[2], color_cube[3]);
gtk_widget_set_default_visual (gtk_preview_get_visual ());
gtk_widget_set_default_colormap (gtk_preview_get_cmap ());
dlg = gtk_dialog_new ();
gtk_window_set_title (GTK_WINDOW (dlg), "Ripple");
gtk_window_position (GTK_WINDOW (dlg), GTK_WIN_POS_MOUSE);
gtk_signal_connect (GTK_OBJECT (dlg), "destroy",
(GtkSignalFunc) ripple_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) ripple_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);
/* The main vbox */
main_vbox = gtk_vbox_new (FALSE, 5);
gtk_container_border_width (GTK_CONTAINER (main_vbox), 10);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dlg)->vbox), main_vbox, TRUE, TRUE, 0);
/* The hbox for first row of options */
hbox = gtk_hbox_new (FALSE, 5);
gtk_box_pack_start (GTK_BOX (main_vbox), hbox, TRUE, TRUE, 0);
/* The table to hold the four frames of options */
table = gtk_table_new (2, 2, FALSE);
gtk_container_border_width (GTK_CONTAINER (table), 10);
gtk_box_pack_start (GTK_BOX (hbox), table, TRUE, TRUE, 0);
/* Options section */
/* the vertical box and its toggle buttons */
frame = gtk_frame_new ("Options");
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN);
gtk_table_attach (GTK_TABLE (table), frame, 0, 1, 0, 1,
GTK_EXPAND | GTK_FILL, GTK_EXPAND | GTK_FILL, 5, 5);
toggle_vbox = gtk_vbox_new (FALSE, 5);
gtk_container_border_width (GTK_CONTAINER (toggle_vbox), 5);
gtk_container_add (GTK_CONTAINER (frame), toggle_vbox);
toggle = gtk_check_button_new_with_label ("Antialiasing");
gtk_box_pack_start (GTK_BOX (toggle_vbox), toggle, FALSE, FALSE, 0);
gtk_signal_connect (GTK_OBJECT (toggle), "toggled",
(GtkSignalFunc) ripple_toggle_update,
&rvals.antialias);
gtk_toggle_button_set_state (GTK_TOGGLE_BUTTON (toggle), rvals.antialias);
gtk_widget_show (toggle);
toggle = gtk_check_button_new_with_label ("Retain Tilability");
gtk_box_pack_start (GTK_BOX (toggle_vbox), toggle, FALSE, FALSE, 0);
gtk_signal_connect (GTK_OBJECT (toggle), "toggled",
(GtkSignalFunc) ripple_toggle_update,
&rvals.tile);
gtk_toggle_button_set_state (GTK_TOGGLE_BUTTON (toggle), (rvals.tile));
gtk_widget_show (toggle);
gtk_widget_show (toggle_vbox);
gtk_widget_show (frame);
/* Orientation toggle box */
frame = gtk_frame_new ("Orientation");
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN);
gtk_table_attach (GTK_TABLE (table), frame, 1, 2, 0, 1,
GTK_EXPAND | GTK_FILL, GTK_EXPAND | GTK_FILL, 5, 5);
toggle_vbox = gtk_vbox_new (FALSE, 5);
gtk_container_border_width (GTK_CONTAINER (toggle_vbox), 5);
gtk_container_add (GTK_CONTAINER (frame), toggle_vbox);
toggle = gtk_radio_button_new_with_label (orientation_group, "Horizontal");
orientation_group = gtk_radio_button_group (GTK_RADIO_BUTTON (toggle));
gtk_box_pack_start (GTK_BOX (toggle_vbox), toggle, FALSE, FALSE, 0);
gtk_signal_connect (GTK_OBJECT (toggle), "toggled",
(GtkSignalFunc) ripple_toggle_update,
&do_horizontal);
gtk_toggle_button_set_state (GTK_TOGGLE_BUTTON (toggle), do_horizontal);
gtk_widget_show (toggle);
toggle = gtk_radio_button_new_with_label (orientation_group, "Vertical");
orientation_group = gtk_radio_button_group (GTK_RADIO_BUTTON (toggle));
gtk_box_pack_start (GTK_BOX (toggle_vbox), toggle, FALSE, FALSE, 0);
gtk_signal_connect (GTK_OBJECT (toggle), "toggled",
(GtkSignalFunc) ripple_toggle_update,
&do_vertical);
gtk_toggle_button_set_state (GTK_TOGGLE_BUTTON (toggle), do_vertical);
gtk_widget_show (toggle);
gtk_widget_show (toggle_vbox);
gtk_widget_show (frame);
gtk_widget_show (hbox);
/* The hbox for the second row of options */
hbox = gtk_hbox_new (FALSE, 5);
gtk_box_pack_start (GTK_BOX (main_vbox), hbox, TRUE, TRUE, 0);
/* Edges toggle box */
frame = gtk_frame_new ("Edges");
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN);
gtk_table_attach (GTK_TABLE (table), frame, 0, 1, 1, 2, GTK_FILL | GTK_EXPAND, GTK_FILL | GTK_EXPAND, 5, 5);
toggle_vbox = gtk_vbox_new (FALSE, 5);
gtk_container_border_width (GTK_CONTAINER (toggle_vbox), 5);
gtk_container_add (GTK_CONTAINER (frame), toggle_vbox);
toggle = gtk_radio_button_new_with_label (edges_group, "Wrap");
edges_group = gtk_radio_button_group (GTK_RADIO_BUTTON (toggle));
gtk_box_pack_start (GTK_BOX (toggle_vbox), toggle, FALSE, FALSE, 0);
gtk_signal_connect (GTK_OBJECT (toggle), "toggled",
(GtkSignalFunc) ripple_toggle_update,
&do_wrap);
gtk_toggle_button_set_state (GTK_TOGGLE_BUTTON (toggle), do_wrap);
gtk_widget_show (toggle);
toggle = gtk_radio_button_new_with_label (edges_group, "Smear");
edges_group = gtk_radio_button_group (GTK_RADIO_BUTTON (toggle));
gtk_box_pack_start (GTK_BOX (toggle_vbox), toggle, FALSE, FALSE, 0);
gtk_signal_connect (GTK_OBJECT (toggle), "toggled",
(GtkSignalFunc) ripple_toggle_update,
&do_smear);
gtk_toggle_button_set_state (GTK_TOGGLE_BUTTON (toggle), do_smear);
gtk_widget_show (toggle);
toggle = gtk_radio_button_new_with_label (edges_group, "Black");
edges_group = gtk_radio_button_group (GTK_RADIO_BUTTON (toggle));
gtk_box_pack_start (GTK_BOX (toggle_vbox), toggle, FALSE, FALSE, 0);
gtk_signal_connect (GTK_OBJECT (toggle), "toggled",
(GtkSignalFunc) ripple_toggle_update,
&do_black);
gtk_toggle_button_set_state (GTK_TOGGLE_BUTTON (toggle), do_black);
gtk_widget_show (toggle);
gtk_widget_show (toggle_vbox);
gtk_widget_show (frame);
/* Edges toggle box */
frame = gtk_frame_new ("Wave Type");
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN);
gtk_table_attach (GTK_TABLE (table), frame, 1, 2, 1, 2, GTK_FILL | GTK_EXPAND, GTK_FILL | GTK_EXPAND, 5, 5);
toggle_vbox = gtk_vbox_new (FALSE, 5);
gtk_container_border_width (GTK_CONTAINER (toggle_vbox), 5);
gtk_container_add (GTK_CONTAINER (frame), toggle_vbox);
toggle = gtk_radio_button_new_with_label (waveform_group, "Sawtooth");
waveform_group = gtk_radio_button_group (GTK_RADIO_BUTTON (toggle));
gtk_box_pack_start (GTK_BOX (toggle_vbox), toggle, FALSE, FALSE, 0);
gtk_signal_connect (GTK_OBJECT (toggle), "toggled",
(GtkSignalFunc) ripple_toggle_update,
&do_sawtooth);
gtk_toggle_button_set_state (GTK_TOGGLE_BUTTON (toggle), do_sawtooth);
gtk_widget_show (toggle);
toggle = gtk_radio_button_new_with_label (waveform_group, "Sine");
waveform_group = gtk_radio_button_group (GTK_RADIO_BUTTON (toggle));
gtk_box_pack_start (GTK_BOX (toggle_vbox), toggle, FALSE, FALSE, 0);
gtk_signal_connect (GTK_OBJECT (toggle), "toggled",
(GtkSignalFunc) ripple_toggle_update,
&do_sine);
gtk_toggle_button_set_state (GTK_TOGGLE_BUTTON (toggle), do_sine);
gtk_widget_show (toggle);
gtk_widget_show (toggle_vbox);
gtk_widget_show (frame);
gtk_widget_show (table);
gtk_widget_show (hbox);
/* 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 (main_vbox), frame, TRUE, TRUE, 0);
table = gtk_table_new (2, 2, FALSE);
gtk_container_border_width (GTK_CONTAINER (table), 10);
gtk_container_add (GTK_CONTAINER (frame), table);
/* Period */
label = gtk_label_new ("Period");
gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.5);
gtk_table_attach (GTK_TABLE (table), label, 0, 1, 0, 1, GTK_FILL | GTK_EXPAND, GTK_FILL, 10, 5);
gtk_widget_show (label);
hbox = gtk_hbox_new (FALSE, 5);
gtk_table_attach (GTK_TABLE (table), hbox, 1, 2, 0, 1,
GTK_EXPAND | GTK_FILL, GTK_EXPAND | GTK_FILL, 0, 0);
gtk_widget_show (hbox);
scale_data = gtk_adjustment_new (rvals.period, 0, 200, 1, 1, 0.0);
gtk_signal_connect (GTK_OBJECT (scale_data), "value_changed",
(GtkSignalFunc) ripple_iscale_callback,
&rvals.period);
scale = gtk_hscale_new (GTK_ADJUSTMENT (scale_data));
gtk_widget_set_usize (scale, SCALE_WIDTH, 0);
gtk_scale_set_digits (GTK_SCALE (scale), 2);
gtk_scale_set_draw_value (GTK_SCALE (scale), FALSE);
gtk_box_pack_start (GTK_BOX (hbox), scale, TRUE, TRUE, 0);
gtk_widget_show (scale);
entry = gtk_entry_new ();
gtk_object_set_user_data (GTK_OBJECT (entry), scale_data);
gtk_object_set_user_data (scale_data, entry);
gtk_box_pack_start (GTK_BOX (hbox), entry, FALSE, TRUE, 0);
gtk_widget_set_usize (entry, ENTRY_WIDTH, 0);
sprintf (buffer, "%d", rvals.period);
gtk_entry_set_text (GTK_ENTRY (entry), buffer);
gtk_signal_connect (GTK_OBJECT (entry), "changed",
(GtkSignalFunc) ripple_ientry_callback,
&rvals.period);
gtk_widget_show (entry);
/* Amplitude */
label = gtk_label_new ("Amplitude");
gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.5);
gtk_table_attach (GTK_TABLE (table), label, 0, 1, 1, 2, GTK_FILL | GTK_EXPAND, GTK_FILL, 10, 5);
gtk_widget_show (label);
hbox = gtk_hbox_new (FALSE, 5);
gtk_table_attach (GTK_TABLE (table), hbox, 1, 2, 1, 2,
GTK_EXPAND | GTK_FILL, GTK_EXPAND | GTK_FILL, 0, 0);
gtk_widget_show (hbox);
scale_data = gtk_adjustment_new (rvals.amplitude, 0, 200, 1, 1, 0.0);
gtk_signal_connect (GTK_OBJECT (scale_data), "value_changed",
(GtkSignalFunc) ripple_iscale_callback,
&rvals.amplitude);
scale = gtk_hscale_new (GTK_ADJUSTMENT (scale_data));
gtk_widget_set_usize (scale, SCALE_WIDTH, 0);
gtk_scale_set_digits (GTK_SCALE (scale), 2);
gtk_scale_set_draw_value (GTK_SCALE (scale), FALSE);
gtk_box_pack_start (GTK_BOX (hbox), scale, TRUE, TRUE, 0);
gtk_widget_show (scale);
entry = gtk_entry_new ();
gtk_object_set_user_data (GTK_OBJECT (entry), scale_data);
gtk_object_set_user_data (scale_data, entry);
gtk_box_pack_start (GTK_BOX (hbox), entry, FALSE, TRUE, 0);
gtk_widget_set_usize (entry, ENTRY_WIDTH, 0);
sprintf (buffer, "%d", rvals.amplitude);
gtk_entry_set_text (GTK_ENTRY (entry), buffer);
gtk_signal_connect (GTK_OBJECT (entry), "changed",
(GtkSignalFunc) ripple_ientry_callback,
&rvals.amplitude);
gtk_widget_show (entry);
gtk_widget_show (frame);
gtk_widget_show (table);
gtk_widget_show (main_vbox);
gtk_widget_show (dlg);
gtk_main();
gdk_flush();
/* determine orientation */
if (do_horizontal)
rvals.orientation = HORIZONTAL;
else
rvals.orientation = VERTICAL;
/* determine edges */
if (do_smear)
rvals.edges = SMEAR;
else if (do_wrap)
rvals.edges = WRAP;
else if (do_black)
rvals.edges = BLACK;
/* determine wave form */
if (do_sawtooth)
rvals.waveform = SAWTOOTH;
else if (do_sine)
rvals.waveform = SINE;
return rpint.run;
}
/*****/
static GTile *
ripple_pixel (GDrawable * drawable,
GTile * tile,
gint x1,
gint y1,
gint x2,
gint y2,
gint x,
gint y,
gint * row,
gint * col,
guchar * pixel)
{
static guchar empty_pixel[4] = {0, 0, 0, 0};
guchar *data;
gint b;
if (x >= x1 && y >= y1 && x < x2 && y < y2)
{
if ((x >> 6 != *col) || (y >> 6 != *row))
{
*col = x / 64;
*row = y / 64;
if (tile)
gimp_tile_unref (tile, FALSE);
tile = gimp_drawable_get_tile (drawable, FALSE, *row, *col);
gimp_tile_ref (tile);
}
data = tile->data + tile->bpp * (tile->ewidth * (y % 64) + (x % 64));
}
else
data = empty_pixel;
for (b = 0; b < drawable->bpp; b++)
pixel[b] = data[b];
return tile;
}
/* Ripple interface functions */
static void
ripple_close_callback (GtkWidget *widget,
gpointer data)
{
gtk_main_quit ();
}
static void
ripple_ok_callback (GtkWidget *widget,
gpointer data)
{
rpint.run = TRUE;
gtk_widget_destroy (GTK_WIDGET (data));
}
static void
ripple_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;
}
static void
ripple_ientry_callback (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");
}
}
}
static void
ripple_iscale_callback (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 guchar
averagetwo (gdouble location, guchar *v)
{
location = fmod(location, 1.0);
return (guchar) ((1.0 - location) * v[0] + location * v[1]);
} /* averagetwo */
static guchar
averagefour (gdouble location, guchar *v)
{
location = fmod(location, 1.0);
return ((1.0 - location) * (v[0] + v[2]) + location * (v[1] + v[3]))/2;
}
static gdouble
displace_amount (gint location)
{
switch (rvals.waveform)
{
case SINE:
return rvals.amplitude*sin(location*(2*M_PI)/(double)rvals.period);
case SAWTOOTH:
return floor(rvals.amplitude*(fabs((((location%rvals.period)/(double)rvals.period)*4)-2)-1));
}
return 0;
}
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