mirror of https://github.com/GNOME/gimp.git
560 lines
15 KiB
C
560 lines
15 KiB
C
/*
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* This is a plugin for the GIMP.
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*
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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* Copyright (C) 1996 Torsten Martinsen
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* $Id$
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*/
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/*
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* This filter adds random noise to an image.
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* The amount of noise can be set individually for each RGB channel.
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* This filter does not operate on indexed images.
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <time.h>
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#include "gtk/gtk.h"
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#include "libgimp/gimp.h"
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#define ENTRY_WIDTH 60
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#define SCALE_WIDTH 125
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#define TILE_CACHE_SIZE 16
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typedef struct
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{
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gint independent;
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gdouble noise[4]; /* per channel */
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} NoisifyVals;
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typedef struct
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{
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gint run;
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} NoisifyInterface;
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/* Declare local functions.
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*/
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static void query (void);
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static void run (char *name,
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int nparams,
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GParam *param,
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int *nreturn_vals,
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GParam **return_vals);
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static void noisify (GDrawable * drawable);
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static gint noisify_dialog (gint channels);
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static gdouble gauss (void);
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static void noisify_close_callback (GtkWidget *widget,
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gpointer data);
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static void noisify_ok_callback (GtkWidget *widget,
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gpointer data);
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static void noisify_toggle_update (GtkWidget *widget,
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gpointer data);
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static void noisify_scale_update (GtkAdjustment *adjustment,
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double *scale_val);
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static void noisify_entry_update (GtkWidget *widget,
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gdouble *value);
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static void dialog_create_value (char *title,
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GtkTable *table,
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int row,
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gdouble *value,
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double left,
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double right);
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GPlugInInfo PLUG_IN_INFO =
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{
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NULL, /* init_proc */
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NULL, /* quit_proc */
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query, /* query_proc */
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run, /* run_proc */
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};
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static NoisifyVals nvals =
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{
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TRUE,
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{ 0.20, 0.20, 0.20, 0.20 }
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};
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static NoisifyInterface noise_int =
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{
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FALSE /* run */
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};
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MAIN ()
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static void
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query ()
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{
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static GParamDef args[] =
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{
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{ PARAM_INT32, "run_mode", "Interactive, non-interactive" },
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{ PARAM_IMAGE, "image", "Input image (unused)" },
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{ PARAM_DRAWABLE, "drawable", "Input drawable" },
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{ PARAM_INT32, "independent", "Noise in channels independent" },
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{ PARAM_FLOAT, "noise_1", "Noise in the first channel (red, gray)" },
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{ PARAM_FLOAT, "noise_2", "Noise in the second channel (green, gray_alpha)" },
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{ PARAM_FLOAT, "noise_3", "Noise in the third channel (blue)" },
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{ PARAM_FLOAT, "noise_4", "Noise in the fourth channel (alpha)" }
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};
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static GParamDef *return_vals = NULL;
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static int nargs = sizeof (args) / sizeof (args[0]);
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static int nreturn_vals = 0;
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gimp_install_procedure ("plug_in_noisify",
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"Adds random noise to a drawable's channels",
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"More here later",
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"Torsten Martinsen",
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"Torsten Martinsen",
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"1996",
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"<Image>/Filters/Noise/Noisify",
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"RGB*, GRAY*",
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PROC_PLUG_IN,
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nargs, nreturn_vals,
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args, return_vals);
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}
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static void
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run (char *name,
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int nparams,
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GParam *param,
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int *nreturn_vals,
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GParam **return_vals)
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{
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static GParam values[1];
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GDrawable *drawable;
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GRunModeType run_mode;
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GStatusType status = STATUS_SUCCESS;
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run_mode = param[0].data.d_int32;
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*nreturn_vals = 1;
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*return_vals = values;
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values[0].type = PARAM_STATUS;
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values[0].data.d_status = status;
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/* Get the specified drawable */
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drawable = gimp_drawable_get (param[2].data.d_drawable);
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switch (run_mode)
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{
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case RUN_INTERACTIVE:
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/* Possibly retrieve data */
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gimp_get_data ("plug_in_noisify", &nvals);
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/* First acquire information with a dialog */
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if (! noisify_dialog (drawable->bpp))
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{
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gimp_drawable_detach (drawable);
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return;
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}
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break;
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case RUN_NONINTERACTIVE:
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/* Make sure all the arguments are there! */
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if (nparams != 8)
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status = STATUS_CALLING_ERROR;
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if (status == STATUS_SUCCESS)
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{
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nvals.independent = (param[3].data.d_int32) ? TRUE : FALSE;
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nvals.noise[0] = param[4].data.d_float;
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nvals.noise[1] = param[5].data.d_float;
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nvals.noise[2] = param[6].data.d_float;
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nvals.noise[3] = param[7].data.d_float;
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}
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break;
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case RUN_WITH_LAST_VALS:
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/* Possibly retrieve data */
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gimp_get_data ("plug_in_noisify", &nvals);
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break;
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default:
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break;
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}
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/* Make sure that the drawable is gray or RGB color */
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if (gimp_drawable_color (drawable->id) || gimp_drawable_gray (drawable->id))
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{
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gimp_progress_init ("Adding Noise...");
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gimp_tile_cache_ntiles (TILE_CACHE_SIZE);
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/* seed the random number generator */
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srand (time (NULL));
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/* compute the luminosity which exceeds the luminosity threshold */
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noisify (drawable);
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if (run_mode != RUN_NONINTERACTIVE)
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gimp_displays_flush ();
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/* Store data */
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if (run_mode == RUN_INTERACTIVE)
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gimp_set_data ("plug_in_noisify", &nvals, sizeof (NoisifyVals));
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}
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else
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{
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/* gimp_message ("blur: cannot operate on indexed color images"); */
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status = STATUS_EXECUTION_ERROR;
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}
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values[0].data.d_status = status;
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gimp_drawable_detach (drawable);
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}
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static void
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noisify (GDrawable *drawable)
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{
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GPixelRgn src_rgn, dest_rgn;
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guchar *src_row, *dest_row;
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guchar *src, *dest;
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gint row, col, b;
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gint x1, y1, x2, y2, p;
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gint noise;
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gint progress, max_progress;
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gpointer pr;
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/* initialize */
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noise = 0;
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gimp_drawable_mask_bounds (drawable->id, &x1, &y1, &x2, &y2);
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gimp_pixel_rgn_init (&src_rgn, drawable, x1, y1, (x2 - x1), (y2 - y1), FALSE, FALSE);
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gimp_pixel_rgn_init (&dest_rgn, drawable, x1, y1, (x2 - x1), (y2 - y1), TRUE, TRUE);
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/* Initialize progress */
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progress = 0;
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max_progress = (x2 - x1) * (y2 - y1);
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for (pr = gimp_pixel_rgns_register (2, &src_rgn, &dest_rgn); pr != NULL; pr = gimp_pixel_rgns_process (pr))
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{
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src_row = src_rgn.data;
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dest_row = dest_rgn.data;
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for (row = 0; row < src_rgn.h; row++)
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{
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src = src_row;
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dest = dest_row;
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for (col = 0; col < src_rgn.w; col++)
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{
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if (nvals.independent == FALSE)
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noise = (gint) (nvals.noise[0] * gauss() * 127);
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for (b = 0; b < src_rgn.bpp; b++)
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{
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if (nvals.independent == TRUE)
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noise = (gint) (nvals.noise[b] * gauss() * 127);
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p = src[b] + noise;
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if (p < 0)
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p = 0;
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else if (p > 255)
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p = 255;
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if (nvals.noise[b] != 0)
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dest[b] = p;
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}
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src += src_rgn.bpp;
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dest += dest_rgn.bpp;
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}
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src_row += src_rgn.rowstride;
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dest_row += dest_rgn.rowstride;
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}
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/* Update progress */
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progress += src_rgn.w * src_rgn.h;
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gimp_progress_update ((double) progress / (double) max_progress);
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}
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/* update the blurred region */
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gimp_drawable_flush (drawable);
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gimp_drawable_merge_shadow (drawable->id, TRUE);
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gimp_drawable_update (drawable->id, x1, y1, (x2 - x1), (y2 - y1));
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}
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static gint
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noisify_dialog (gint channels)
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{
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GtkWidget *dlg;
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GtkWidget *button;
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GtkWidget *toggle;
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GtkWidget *frame;
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GtkWidget *table;
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gchar buffer[32];
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gchar **argv;
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gint argc;
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int i;
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argc = 1;
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argv = g_new (gchar *, 1);
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argv[0] = g_strdup ("noisify");
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gtk_init (&argc, &argv);
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gtk_rc_parse (gimp_gtkrc ());
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dlg = gtk_dialog_new ();
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gtk_window_set_title (GTK_WINDOW (dlg), "Noisify");
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gtk_window_position (GTK_WINDOW (dlg), GTK_WIN_POS_MOUSE);
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gtk_signal_connect (GTK_OBJECT (dlg), "destroy",
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(GtkSignalFunc) noisify_close_callback,
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NULL);
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/* Action area */
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button = gtk_button_new_with_label ("OK");
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GTK_WIDGET_SET_FLAGS (button, GTK_CAN_DEFAULT);
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gtk_signal_connect (GTK_OBJECT (button), "clicked",
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(GtkSignalFunc) noisify_ok_callback,
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dlg);
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gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dlg)->action_area), button, TRUE, TRUE, 0);
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gtk_widget_grab_default (button);
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gtk_widget_show (button);
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button = gtk_button_new_with_label ("Cancel");
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GTK_WIDGET_SET_FLAGS (button, GTK_CAN_DEFAULT);
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gtk_signal_connect_object (GTK_OBJECT (button), "clicked",
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(GtkSignalFunc) gtk_widget_destroy,
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GTK_OBJECT (dlg));
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gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dlg)->action_area), button, TRUE, TRUE, 0);
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gtk_widget_show (button);
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/* parameter settings */
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frame = gtk_frame_new ("Parameter Settings");
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gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN);
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gtk_container_border_width (GTK_CONTAINER (frame), 10);
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gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dlg)->vbox), frame, TRUE, TRUE, 0);
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table = gtk_table_new (channels + 1, 3, FALSE);
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gtk_container_border_width (GTK_CONTAINER (table), 10);
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gtk_container_add (GTK_CONTAINER (frame), table);
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toggle = gtk_check_button_new_with_label ("Independent");
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gtk_table_attach (GTK_TABLE (table), toggle, 0, 2, 0, 1, GTK_FILL, 0, 0, 0);
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gtk_signal_connect (GTK_OBJECT (toggle), "toggled",
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(GtkSignalFunc) noisify_toggle_update,
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&nvals.independent);
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gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle), nvals.independent);
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gtk_widget_show (toggle);
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/* for (i = 0; i < channels; i++)
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{
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sprintf (buffer, "Channel #%d", i);
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dialog_create_value(buffer, GTK_TABLE(table), i+1, &nvals.noise[i], 0.0, 1.0);
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}
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*/
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if (channels == 1)
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{
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sprintf (buffer, "Gray");
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dialog_create_value(buffer, GTK_TABLE(table), 1, &nvals.noise[0], 0.0, 1.0);
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}
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else if (channels == 2)
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{
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sprintf (buffer, "Gray");
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dialog_create_value(buffer, GTK_TABLE(table), 1, &nvals.noise[0], 0.0, 1.0);
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sprintf (buffer, "Alpha");
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dialog_create_value(buffer, GTK_TABLE(table), 2, &nvals.noise[1], 0.0, 1.0);
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}
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else if (channels == 3)
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{
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sprintf (buffer, "Red");
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dialog_create_value(buffer, GTK_TABLE(table), 1, &nvals.noise[0], 0.0, 1.0);
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sprintf (buffer, "Green");
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dialog_create_value(buffer, GTK_TABLE(table), 2, &nvals.noise[1], 0.0, 1.0);
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sprintf (buffer, "Blue");
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dialog_create_value(buffer, GTK_TABLE(table), 3, &nvals.noise[2], 0.0, 1.0);
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}
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else if (channels == 4)
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{
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sprintf (buffer, "Red");
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dialog_create_value(buffer, GTK_TABLE(table), 1, &nvals.noise[0], 0.0, 1.0);
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sprintf (buffer, "Green");
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dialog_create_value(buffer, GTK_TABLE(table), 2, &nvals.noise[1], 0.0, 1.0);
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sprintf (buffer, "Blue");
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dialog_create_value(buffer, GTK_TABLE(table), 3, &nvals.noise[2], 0.0, 1.0);
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sprintf (buffer, "Alpha");
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dialog_create_value(buffer, GTK_TABLE(table), 4, &nvals.noise[3], 0.0, 1.0);
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}
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else
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{
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for (i = 0; i < channels; i++)
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{
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sprintf (buffer, "Channel #%d", i);
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dialog_create_value(buffer, GTK_TABLE(table), i+1, &nvals.noise[i], 0.0, 1.0);
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}
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}
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gtk_widget_show (frame);
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gtk_widget_show (table);
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gtk_widget_show (dlg);
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gtk_main ();
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gdk_flush ();
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return noise_int.run;
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}
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/*
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* Return a Gaussian (aka normal) random variable.
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*
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* Adapted from ppmforge.c, which is part of PBMPLUS.
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* The algorithm comes from:
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* 'The Science Of Fractal Images'. Peitgen, H.-O., and Saupe, D. eds.
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* Springer Verlag, New York, 1988.
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*/
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static gdouble
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gauss ()
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{
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gint i;
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gdouble sum = 0.0;
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for (i = 0; i < 4; i++)
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sum += rand () & 0x7FFF;
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return sum * 5.28596089837e-5 - 3.46410161514;
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}
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/* Noisify interface functions */
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static void
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noisify_close_callback (GtkWidget *widget,
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gpointer data)
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{
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gtk_main_quit ();
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}
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static void
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noisify_ok_callback (GtkWidget *widget,
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gpointer data)
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{
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noise_int.run = TRUE;
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gtk_widget_destroy (GTK_WIDGET (data));
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}
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static void
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noisify_toggle_update (GtkWidget *widget,
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gpointer data)
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{
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int *toggle_val;
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toggle_val = (int *) data;
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if (GTK_TOGGLE_BUTTON (widget)->active)
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*toggle_val = TRUE;
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else
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*toggle_val = FALSE;
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}
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/*
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* Thanks to Quartic for these.
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*/
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static void
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dialog_create_value(char *title, GtkTable *table, int row, gdouble *value, double left, double right)
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{
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GtkWidget *label;
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GtkWidget *scale;
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GtkWidget *entry;
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GtkObject *scale_data;
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char buf[256];
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label = gtk_label_new(title);
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gtk_misc_set_alignment(GTK_MISC(label), 0.0, 0.5);
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gtk_table_attach(table, label, 0, 1, row, row + 1, GTK_FILL, GTK_FILL, 4, 0);
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gtk_widget_show(label);
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scale_data = gtk_adjustment_new(*value, left, right,
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(right - left) / 200.0,
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(right - left) / 200.0,
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0.0);
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gtk_signal_connect(GTK_OBJECT(scale_data), "value_changed",
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(GtkSignalFunc) noisify_scale_update,
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value);
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scale = gtk_hscale_new(GTK_ADJUSTMENT(scale_data));
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gtk_widget_set_usize(scale, SCALE_WIDTH, 0);
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gtk_table_attach(table, scale, 1, 2, row, row + 1, GTK_EXPAND | GTK_FILL, GTK_FILL, 0, 0);
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gtk_scale_set_draw_value(GTK_SCALE(scale), FALSE);
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gtk_scale_set_digits(GTK_SCALE(scale), 3);
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gtk_range_set_update_policy(GTK_RANGE(scale), GTK_UPDATE_CONTINUOUS);
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gtk_widget_show(scale);
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entry = gtk_entry_new();
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gtk_object_set_user_data(GTK_OBJECT(entry), scale_data);
|
|
gtk_object_set_user_data(scale_data, entry);
|
|
gtk_widget_set_usize(entry, ENTRY_WIDTH, 0);
|
|
sprintf(buf, "%0.2f", *value);
|
|
gtk_entry_set_text(GTK_ENTRY(entry), buf);
|
|
gtk_signal_connect(GTK_OBJECT(entry), "changed",
|
|
(GtkSignalFunc) noisify_entry_update,
|
|
value);
|
|
gtk_table_attach(GTK_TABLE(table), entry, 2, 3, row, row + 1, GTK_FILL, GTK_FILL, 4, 0);
|
|
gtk_widget_show(entry);
|
|
}
|
|
|
|
static void
|
|
noisify_entry_update(GtkWidget *widget, gdouble *value)
|
|
{
|
|
GtkAdjustment *adjustment;
|
|
gdouble new_value;
|
|
|
|
new_value = atof(gtk_entry_get_text(GTK_ENTRY(widget)));
|
|
|
|
if (*value != new_value) {
|
|
adjustment = gtk_object_get_user_data(GTK_OBJECT(widget));
|
|
|
|
if ((new_value >= adjustment->lower) &&
|
|
(new_value <= adjustment->upper)) {
|
|
*value = new_value;
|
|
adjustment->value = new_value;
|
|
|
|
gtk_signal_emit_by_name(GTK_OBJECT(adjustment), "value_changed");
|
|
} /* if */
|
|
} /* if */
|
|
}
|
|
|
|
static void
|
|
noisify_scale_update (GtkAdjustment *adjustment, gdouble *value)
|
|
{
|
|
GtkWidget *entry;
|
|
char buf[256];
|
|
|
|
if (*value != adjustment->value) {
|
|
*value = adjustment->value;
|
|
|
|
entry = gtk_object_get_user_data(GTK_OBJECT(adjustment));
|
|
sprintf(buf, "%0.2f", *value);
|
|
|
|
gtk_signal_handler_block_by_data(GTK_OBJECT(entry), value);
|
|
gtk_entry_set_text(GTK_ENTRY(entry), buf);
|
|
gtk_signal_handler_unblock_by_data(GTK_OBJECT(entry), value);
|
|
} /* if */
|
|
}
|