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- /*
- * This is a plugin for the GIMP.
- *
- * Copyright (C) 1995 Spencer Kimball and Peter Mattis
- * Copyright (C) 1996 Torsten Martinsen
- *
- * 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.
- *
- * $Id: noisify.c,v 1.22 2000/09/30 20:13:06 nicklamb Exp $
- */
-
- /*
- * This filter adds random noise to an image.
- * The amount of noise can be set individually for each RGB channel.
- * This filter does not operate on indexed images.
- *
- * May 2000 tim copperfield [timecop@japan.co.jp]
- * Added dynamic preview.
- *
- * alt@gimp.org. Fixed previews so they handle alpha channels correctly.
- */
-
- #include "config.h"
-
- #include <stdlib.h>
- #include <stdio.h>
- #include <string.h>
- #include <time.h>
-
- #include <gtk/gtk.h>
-
- #include <libgimp/gimp.h>
- #include <libgimp/gimpui.h>
-
- #include "libgimp/stdplugins-intl.h"
-
-
- #define SCALE_WIDTH 125
- #define TILE_CACHE_SIZE 16
- #define PREVIEW_SIZE 128
-
- typedef struct
- {
- gint independent;
- gdouble noise[4]; /* per channel */
- } NoisifyVals;
-
- typedef struct
- {
- gint channels;
- GtkObject *channel_adj[4];
- gint run;
- } NoisifyInterface;
-
- /* Declare local functions.
- */
- static void query (void);
- static void run (gchar *name,
- gint nparams,
- GimpParam *param,
- gint *nreturn_vals,
- GimpParam **return_vals);
-
- static void noisify (GimpDrawable *drawable, gboolean preview_mode);
- static gdouble gauss (void);
-
- static void fill_preview (GtkWidget *preview_widget,
- GimpDrawable *drawable);
- static GtkWidget *preview_widget (GimpDrawable *drawable);
-
- static gint noisify_dialog (GimpDrawable *drawable,
- gint channels);
- static void noisify_ok_callback (GtkWidget *widget,
- gpointer data);
- static void noisify_double_adjustment_update (GtkAdjustment *adjustment,
- gpointer data);
-
- GimpPlugInInfo PLUG_IN_INFO =
- {
- NULL, /* init_proc */
- NULL, /* quit_proc */
- query, /* query_proc */
- run, /* run_proc */
- };
-
- static NoisifyVals nvals =
- {
- TRUE,
- { 0.20, 0.20, 0.20, 0.20 }
- };
-
- static NoisifyInterface noise_int =
- {
- 0,
- { NULL, NULL, NULL, NULL },
- FALSE /* run */
- };
-
- static GtkWidget *preview;
- static guchar *preview_cache;
- static gint preview_cache_rowstride;
- static gint preview_cache_bpp;
-
-
- MAIN ()
-
- static void
- query (void)
- {
- static GimpParamDef args[] =
- {
- { GIMP_PDB_INT32, "run_mode", "Interactive, non-interactive" },
- { GIMP_PDB_IMAGE, "image", "Input image (unused)" },
- { GIMP_PDB_DRAWABLE, "drawable", "Input drawable" },
- { GIMP_PDB_INT32, "independent", "Noise in channels independent" },
- { GIMP_PDB_FLOAT, "noise_1", "Noise in the first channel (red, gray)" },
- { GIMP_PDB_FLOAT, "noise_2", "Noise in the second channel (green, gray_alpha)" },
- { GIMP_PDB_FLOAT, "noise_3", "Noise in the third channel (blue)" },
- { GIMP_PDB_FLOAT, "noise_4", "Noise in the fourth channel (alpha)" }
- };
- static gint nargs = sizeof (args) / sizeof (args[0]);
-
- gimp_install_procedure ("plug_in_noisify",
- "Adds random noise to a drawable's channels",
- "More here later",
- "Torsten Martinsen",
- "Torsten Martinsen",
- "May 2000",
- N_("<Image>/Filters/Noise/Noisify..."),
- "RGB*, GRAY*",
- GIMP_PLUGIN,
- nargs, 0,
- args, NULL);
- }
-
- static void
- run (gchar *name,
- gint nparams,
- GimpParam *param,
- gint *nreturn_vals,
- GimpParam **return_vals)
- {
- static GimpParam values[1];
- GimpDrawable *drawable;
- GimpRunModeType run_mode;
- GimpPDBStatusType status = GIMP_PDB_SUCCESS;
-
- run_mode = param[0].data.d_int32;
-
- *nreturn_vals = 1;
- *return_vals = values;
-
- values[0].type = GIMP_PDB_STATUS;
- values[0].data.d_status = status;
-
- /* Get the specified drawable */
- drawable = gimp_drawable_get (param[2].data.d_drawable);
-
- switch (run_mode)
- {
- case GIMP_RUN_INTERACTIVE:
- INIT_I18N_UI();
- /* Possibly retrieve data */
- gimp_get_data ("plug_in_noisify", &nvals);
-
- /* First acquire information with a dialog */
- if (! noisify_dialog (drawable, drawable->bpp))
- {
- gimp_drawable_detach (drawable);
- return;
- }
- break;
-
- case GIMP_RUN_NONINTERACTIVE:
- INIT_I18N();
- /* Make sure all the arguments are there! */
- if (nparams != 8)
- {
- status = GIMP_PDB_CALLING_ERROR;
- }
- else
- {
- nvals.independent = param[3].data.d_int32 ? TRUE : FALSE;
- nvals.noise[0] = param[4].data.d_float;
- nvals.noise[1] = param[5].data.d_float;
- nvals.noise[2] = param[6].data.d_float;
- nvals.noise[3] = param[7].data.d_float;
- }
- break;
-
- case GIMP_RUN_WITH_LAST_VALS:
- INIT_I18N();
- /* Possibly retrieve data */
- gimp_get_data ("plug_in_noisify", &nvals);
- break;
-
- default:
- break;
- }
-
- /* Make sure that the drawable is gray or RGB color */
- if (gimp_drawable_is_rgb (drawable->id) ||
- gimp_drawable_is_gray (drawable->id))
- {
- gimp_progress_init (_("Adding Noise..."));
- gimp_tile_cache_ntiles (TILE_CACHE_SIZE);
-
- /* seed the random number generator */
- srand (time (NULL));
-
- /* compute the luminosity which exceeds the luminosity threshold */
- noisify (drawable, FALSE);
-
- if (run_mode != GIMP_RUN_NONINTERACTIVE)
- gimp_displays_flush ();
-
- /* Store data */
- if (run_mode == GIMP_RUN_INTERACTIVE) {
- gimp_set_data ("plug_in_noisify", &nvals, sizeof (NoisifyVals));
- g_free(preview_cache);
- }
- }
- else
- {
- /* gimp_message ("blur: cannot operate on indexed color images"); ??? BLUR ??? */
- status = GIMP_PDB_EXECUTION_ERROR;
- }
-
- values[0].data.d_status = status;
-
- gimp_drawable_detach (drawable);
- }
-
- static void
- preview_do_row(gint row,
- gint width,
- guchar *even,
- guchar *odd,
- guchar *src)
- {
- gint x;
-
- guchar *p0 = even;
- guchar *p1 = odd;
-
- gdouble r, g, b, a;
- gdouble c0, c1;
-
- for (x = 0; x < width; x++)
- {
- if (preview_cache_bpp == 4)
- {
- r = ((gdouble)src[x*4+0]) / 255.0;
- g = ((gdouble)src[x*4+1]) / 255.0;
- b = ((gdouble)src[x*4+2]) / 255.0;
- a = ((gdouble)src[x*4+3]) / 255.0;
- }
- else if (preview_cache_bpp == 3)
- {
- r = ((gdouble)src[x*3+0]) / 255.0;
- g = ((gdouble)src[x*3+1]) / 255.0;
- b = ((gdouble)src[x*3+2]) / 255.0;
- a = 1.0;
- }
- else
- {
- r = ((gdouble)src[x*preview_cache_bpp+0]) / 255.0;
- g = b = r;
- if (preview_cache_bpp == 2)
- a = ((gdouble)src[x*preview_cache_bpp+1]) / 255.0;
- else
- a = 1.0;
- }
-
- if ((x / GIMP_CHECK_SIZE) & 1)
- {
- c0 = GIMP_CHECK_LIGHT;
- c1 = GIMP_CHECK_DARK;
- }
- else
- {
- c0 = GIMP_CHECK_DARK;
- c1 = GIMP_CHECK_LIGHT;
- }
-
- *p0++ = (c0 + (r - c0) * a) * 255.0;
- *p0++ = (c0 + (g - c0) * a) * 255.0;
- *p0++ = (c0 + (b - c0) * a) * 255.0;
-
- *p1++ = (c1 + (r - c1) * a) * 255.0;
- *p1++ = (c1 + (g - c1) * a) * 255.0;
- *p1++ = (c1 + (b - c1) * a) * 255.0;
-
- } /* for */
-
- if ((row / GIMP_CHECK_SIZE) & 1)
- {
- gtk_preview_draw_row (GTK_PREVIEW (preview), (guchar *)odd, 0, row, width);
- }
- else
- {
- gtk_preview_draw_row (GTK_PREVIEW (preview), (guchar *)even, 0, row, width);
- }
- }
-
- static void
- noisify (GimpDrawable *drawable,
- gboolean preview_mode)
- {
- GimpPixelRgn src_rgn, dest_rgn;
- guchar *src_row, *dest_row;
- guchar *src, *dest, *dest_data;
- gint row, col, b;
- gint x1, y1, x2, y2, p, bpp = 3;
- gint noise;
- gint progress = 0, max_progress = 0;
- gpointer pr;
- gint row_stride = 0;
- guchar *odd = NULL;
- guchar *even = NULL;
- /* initialize */
-
- noise = 0;
-
- if (preview_mode)
- {
- x1 = y1 = 0;
- x2 = GTK_PREVIEW (preview)->buffer_width;
- y2 = GTK_PREVIEW (preview)->buffer_height;
- bpp = preview_cache_bpp;
- row_stride = preview_cache_rowstride;
- even = g_malloc (x2 * 3);
- odd = g_malloc (x2 * 3);
- }
- else
- {
- gimp_drawable_mask_bounds (drawable->id, &x1, &y1, &x2, &y2);
- gimp_pixel_rgn_init (&src_rgn, drawable,
- x1, y1, (x2 - x1), (y2 - y1), FALSE, FALSE);
- gimp_pixel_rgn_init (&dest_rgn, drawable,
- x1, y1, (x2 - x1), (y2 - y1), TRUE, TRUE);
- /* Initialize progress */
- progress = 0;
- max_progress = (x2 - x1) * (y2 - y1);
- }
-
- if (preview_mode)
- {
- dest_data = g_malloc (row_stride * y2);
-
- for (row = 0; row < y2; row++)
- {
- src = preview_cache + row * row_stride;
- dest = dest_data + row * row_stride;
-
- for (col = 0; col < x2; col++)
- {
- if (nvals.independent == FALSE)
- noise = (gint) (nvals.noise[0] * gauss() * 127);
-
- for (b = 0; b < bpp; b++)
- {
- if (nvals.independent == TRUE)
- noise = (gint) (nvals.noise[b] * gauss() * 127);
-
- if (nvals.noise[b] > 0.0)
- {
- p = src[b] + noise;
- if (p < 0)
- p = 0;
- else if (p > 255)
- p = 255;
- dest[b] = p;
- }
- else
- dest[b] = src[b];
-
- }
- src += bpp;
- dest += bpp;
- }
- }
-
- for (row = 0; row < y2; row++)
- {
- preview_do_row(row,x2,even,odd,dest_data + row * row_stride);
- }
-
- gtk_widget_queue_draw (preview);
-
- if(even)
- g_free(even);
-
- if(odd)
- g_free(odd);
-
- }
- else
- {
- for (pr = gimp_pixel_rgns_register (2, &src_rgn, &dest_rgn);
- pr != NULL;
- pr = gimp_pixel_rgns_process (pr))
- {
- src_row = src_rgn.data;
- dest_row = dest_rgn.data;
-
- for (row = 0; row < src_rgn.h; row++)
- {
- src = src_row;
- dest = dest_row;
-
- for (col = 0; col < src_rgn.w; col++)
- {
- if (nvals.independent == FALSE)
- noise = (gint) (nvals.noise[0] * gauss() * 127);
-
- for (b = 0; b < src_rgn.bpp; b++)
- {
- if (nvals.independent == TRUE)
- noise = (gint) (nvals.noise[b] * gauss() * 127);
-
- if (nvals.noise[b] > 0.0)
- {
- p = src[b] + noise;
- if (p < 0)
- p = 0;
- else if (p > 255)
- p = 255;
- dest[b] = p;
- }
- else
- dest[b] = src[b];
-
- }
- src += src_rgn.bpp;
- dest += dest_rgn.bpp;
- }
-
- src_row += src_rgn.rowstride;
- dest_row += dest_rgn.rowstride;
- }
-
- /* Update progress */
- progress += src_rgn.w * src_rgn.h;
- gimp_progress_update ((double) progress / (double) max_progress);
- }
-
- /* update the blurred region */
- gimp_drawable_flush (drawable);
- gimp_drawable_merge_shadow (drawable->id, TRUE);
- gimp_drawable_update (drawable->id, x1, y1, (x2 - x1), (y2 - y1));
-
- } /* endif normal mode */
- }
-
- static gint
- noisify_dialog (GimpDrawable *drawable,
- gint channels)
- {
- GtkWidget *dlg;
- GtkWidget *main_vbox;
- GtkWidget *abox;
- GtkWidget *toggle;
- GtkWidget *frame;
- GtkWidget *table;
- GtkObject *adj;
- gchar *buffer;
- gint i;
-
- gimp_ui_init ("noisify", FALSE);
-
- dlg = gimp_dialog_new (_("Noisify"), "noisify",
- gimp_standard_help_func, "filters/noisify.html",
- GTK_WIN_POS_MOUSE,
- FALSE, TRUE, FALSE,
-
- _("OK"), noisify_ok_callback,
- NULL, NULL, NULL, TRUE, FALSE,
- _("Cancel"), gtk_widget_destroy,
- NULL, 1, NULL, FALSE, TRUE,
-
- NULL);
-
- gtk_signal_connect (GTK_OBJECT (dlg), "destroy",
- GTK_SIGNAL_FUNC (gtk_main_quit),
- NULL);
-
- main_vbox = gtk_vbox_new (FALSE, 2);
- gtk_container_set_border_width (GTK_CONTAINER (main_vbox), 0);
- gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dlg)->vbox), main_vbox, TRUE, TRUE, 0);
- gtk_widget_show (main_vbox);
-
- /* preview */
- frame = gtk_frame_new (_("Preview"));
- gtk_container_set_border_width (GTK_CONTAINER (frame), 6);
- gtk_box_pack_start (GTK_BOX (main_vbox), frame, FALSE, FALSE, 0);
- gtk_widget_show (frame);
- abox = gtk_alignment_new (0.5, 0.5, 0.0, 0.0);
- gtk_container_set_border_width (GTK_CONTAINER (abox), 4);
- gtk_container_add (GTK_CONTAINER (frame), abox);
- gtk_widget_show (abox);
- frame = gtk_frame_new (NULL);
- gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
- gtk_container_add (GTK_CONTAINER (abox), frame);
- gtk_widget_show (frame);
- preview = preview_widget (drawable);
- gtk_container_add (GTK_CONTAINER (frame), preview);
- noisify (drawable, TRUE); /* preview noisify */
- gtk_widget_show (preview);
-
- /* parameter settings */
- frame = gtk_frame_new (_("Parameter Settings"));
- gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN);
- gtk_container_set_border_width (GTK_CONTAINER (frame), 6);
- gtk_box_pack_start (GTK_BOX (main_vbox), frame, TRUE, TRUE, 0);
-
- table = gtk_table_new (channels + 1, 3, FALSE);
- gtk_table_set_col_spacings (GTK_TABLE (table), 4);
- gtk_table_set_row_spacings (GTK_TABLE (table), 2);
- gtk_table_set_row_spacing (GTK_TABLE (table), 0, 4);
- gtk_container_set_border_width (GTK_CONTAINER (table), 4);
- gtk_container_add (GTK_CONTAINER (frame), table);
-
- toggle = gtk_check_button_new_with_label (_("Independent"));
- gtk_table_attach (GTK_TABLE (table), toggle, 0, 3, 0, 1, GTK_FILL, 0, 0, 0);
- gtk_signal_connect (GTK_OBJECT (toggle), "toggled",
- GTK_SIGNAL_FUNC (gimp_toggle_button_update),
- &nvals.independent);
- gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle), nvals.independent);
- gtk_widget_show (toggle);
-
- noise_int.channels = channels;
-
- if (channels == 1)
- {
- adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 1,
- _("Gray:"), SCALE_WIDTH, 0,
- nvals.noise[0], 0.0, 1.0, 0.01, 0.1, 2,
- TRUE, 0, 0,
- NULL, NULL);
-
- gtk_object_set_data (GTK_OBJECT (adj), "drawable", drawable);
- gtk_signal_connect (GTK_OBJECT (adj), "value_changed",
- GTK_SIGNAL_FUNC (noisify_double_adjustment_update),
- &nvals.noise[0]);
- noise_int.channel_adj[0] = adj;
- }
- else if (channels == 2)
- {
- adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 1,
- _("Gray:"), SCALE_WIDTH, 0,
- nvals.noise[0], 0.0, 1.0, 0.01, 0.1, 2,
- TRUE, 0, 0,
- NULL, NULL);
- gtk_object_set_data (GTK_OBJECT (adj), "drawable", drawable);
- gtk_signal_connect (GTK_OBJECT (adj), "value_changed",
- GTK_SIGNAL_FUNC (noisify_double_adjustment_update),
- &nvals.noise[0]);
- noise_int.channel_adj[0] = adj;
-
- adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 2,
- _("Alpha:"), SCALE_WIDTH, 0,
- nvals.noise[1], 0.0, 1.0, 0.01, 0.1, 2,
- TRUE, 0, 0,
- NULL, NULL);
- gtk_object_set_data (GTK_OBJECT (adj), "drawable", drawable);
- gtk_signal_connect (GTK_OBJECT (adj), "value_changed",
- GTK_SIGNAL_FUNC (noisify_double_adjustment_update),
- &nvals.noise[1]);
- noise_int.channel_adj[1] = adj;
- }
-
- else if (channels == 3)
- {
- adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 1,
- _("Red:"), SCALE_WIDTH, 0,
- nvals.noise[0], 0.0, 1.0, 0.01, 0.1, 2,
- TRUE, 0, 0,
- NULL, NULL);
- gtk_object_set_data (GTK_OBJECT (adj), "drawable", drawable);
- gtk_signal_connect (GTK_OBJECT (adj), "value_changed",
- GTK_SIGNAL_FUNC (noisify_double_adjustment_update),
- &nvals.noise[0]);
- noise_int.channel_adj[0] = adj;
-
- adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 2,
- _("Green:"), SCALE_WIDTH, 0,
- nvals.noise[1], 0.0, 1.0, 0.01, 0.1, 2,
- TRUE, 0, 0,
- NULL, NULL);
- gtk_object_set_data (GTK_OBJECT (adj), "drawable", drawable);
- gtk_signal_connect (GTK_OBJECT (adj), "value_changed",
- GTK_SIGNAL_FUNC (noisify_double_adjustment_update),
- &nvals.noise[1]);
- noise_int.channel_adj[1] = adj;
-
- adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 3,
- _("Blue:"), SCALE_WIDTH, 0,
- nvals.noise[2], 0.0, 1.0, 0.01, 0.1, 2,
- TRUE, 0, 0,
- NULL, NULL);
- gtk_object_set_data (GTK_OBJECT (adj), "drawable", drawable);
- gtk_signal_connect (GTK_OBJECT (adj), "value_changed",
- GTK_SIGNAL_FUNC (noisify_double_adjustment_update),
- &nvals.noise[2]);
- noise_int.channel_adj[2] = adj;
- }
-
- else if (channels == 4)
- {
- adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 1,
- _("Red:"), SCALE_WIDTH, 0,
- nvals.noise[0], 0.0, 1.0, 0.01, 0.1, 2,
- TRUE, 0, 0,
- NULL, NULL);
- gtk_object_set_data (GTK_OBJECT (adj), "drawable", drawable);
- gtk_signal_connect (GTK_OBJECT (adj), "value_changed",
- GTK_SIGNAL_FUNC (noisify_double_adjustment_update),
- &nvals.noise[0]);
- noise_int.channel_adj[0] = adj;
-
- adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 2,
- _("Green:"), SCALE_WIDTH, 0,
- nvals.noise[1], 0.0, 1.0, 0.01, 0.1, 2,
- TRUE, 0, 0,
- NULL, NULL);
- gtk_object_set_data (GTK_OBJECT (adj), "drawable", drawable);
- gtk_signal_connect (GTK_OBJECT (adj), "value_changed",
- GTK_SIGNAL_FUNC (noisify_double_adjustment_update),
- &nvals.noise[1]);
- noise_int.channel_adj[1] = adj;
-
- adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 3,
- _("Blue:"), SCALE_WIDTH, 0,
- nvals.noise[2], 0.0, 1.0, 0.01, 0.1, 2,
- TRUE, 0, 0,
- NULL, NULL);
- gtk_object_set_data (GTK_OBJECT (adj), "drawable", drawable);
- gtk_signal_connect (GTK_OBJECT (adj), "value_changed",
- GTK_SIGNAL_FUNC (noisify_double_adjustment_update),
- &nvals.noise[2]);
- noise_int.channel_adj[2] = adj;
-
- adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 4,
- _("Alpha:"), SCALE_WIDTH, 0,
- nvals.noise[3], 0.0, 1.0, 0.01, 0.1, 2,
- TRUE, 0, 0,
- NULL, NULL);
- gtk_object_set_data (GTK_OBJECT (adj), "drawable", drawable);
- gtk_signal_connect (GTK_OBJECT (adj), "value_changed",
- GTK_SIGNAL_FUNC (noisify_double_adjustment_update),
- &nvals.noise[3]);
- noise_int.channel_adj[3] = adj;
- }
- else
- {
- for (i = 0; i < channels; i++)
- {
- buffer = g_strdup_printf (_("Channel #%d:"), i);
-
- adj = gimp_scale_entry_new (GTK_TABLE (table), 0, i + 1,
- buffer, SCALE_WIDTH, 0,
- nvals.noise[i], 0.0, 1.0, 0.01, 0.1, 2,
- TRUE, 0, 0,
- NULL, NULL);
- gtk_object_set_data (GTK_OBJECT (adj), "drawable", drawable);
- gtk_signal_connect (GTK_OBJECT (adj), "value_changed",
- GTK_SIGNAL_FUNC (noisify_double_adjustment_update),
- &nvals.noise[i]);
- noise_int.channel_adj[i] = adj;
-
- g_free (buffer);
- }
- }
-
- gtk_widget_show (frame);
- gtk_widget_show (table);
-
- gtk_widget_show (dlg);
-
- gtk_main ();
- gdk_flush ();
-
- return noise_int.run;
- }
-
- /*
- * Return a Gaussian (aka normal) random variable.
- *
- * Adapted from ppmforge.c, which is part of PBMPLUS.
- * The algorithm comes from:
- * 'The Science Of Fractal Images'. Peitgen, H.-O., and Saupe, D. eds.
- * Springer Verlag, New York, 1988.
- */
- static gdouble
- gauss (void)
- {
- gint i;
- gdouble sum = 0.0;
-
- for (i = 0; i < 4; i++)
- sum += rand () & 0x7FFF;
-
- return sum * 5.28596089837e-5 - 3.46410161514;
- }
-
- static void
- noisify_ok_callback (GtkWidget *widget,
- gpointer data)
- {
- noise_int.run = TRUE;
-
- gtk_widget_destroy (GTK_WIDGET (data));
- }
-
- static void
- noisify_double_adjustment_update (GtkAdjustment *adjustment,
- gpointer data)
- {
- GimpDrawable *drawable;
-
- gimp_double_adjustment_update (adjustment, data);
- drawable = gtk_object_get_data (GTK_OBJECT (adjustment), "drawable");
- noisify (drawable, TRUE);
-
- if (! nvals.independent)
- {
- gint i;
-
- for (i = 0; i < noise_int.channels; i++)
- if (adjustment != GTK_ADJUSTMENT (noise_int.channel_adj[i]))
- gtk_adjustment_set_value (GTK_ADJUSTMENT (noise_int.channel_adj[i]),
- adjustment->value);
- }
- }
-
- static GtkWidget *
- preview_widget (GimpDrawable *drawable)
- {
- gint size;
-
- preview = gtk_preview_new (GTK_PREVIEW_COLOR);
- fill_preview (preview, drawable);
- size = GTK_PREVIEW (preview)->rowstride * GTK_PREVIEW (preview)->buffer_height;
- return preview;
- }
-
- static void
- fill_preview (GtkWidget *widget,
- GimpDrawable *drawable)
- {
- GimpPixelRgn srcPR;
- gint width;
- gint height;
- gint x1, x2, y1, y2;
- gint bpp;
- gint y;
- guchar *src;
- guchar *even, *odd;
-
- gimp_drawable_mask_bounds (drawable->id, &x1, &y1, &x2, &y2);
-
- if (x2 - x1 > PREVIEW_SIZE)
- x2 = x1 + PREVIEW_SIZE;
-
- if (y2 - y1 > PREVIEW_SIZE)
- y2 = y1 + PREVIEW_SIZE;
-
- width = x2 - x1;
- height = y2 - y1;
- bpp = gimp_drawable_bpp (drawable->id);
-
- if (width < 1 || height < 1)
- return;
-
- gtk_preview_size (GTK_PREVIEW (widget), width, height);
-
- gimp_pixel_rgn_init (&srcPR, drawable, x1, y1, x2, y2, FALSE, FALSE);
-
- even = g_malloc (width * 3);
- odd = g_malloc (width * 3);
- src = g_malloc (width * bpp);
- preview_cache = g_malloc(width * bpp * height);
- preview_cache_rowstride = width * bpp;
- preview_cache_bpp = bpp;
-
-
- for (y = 0; y < height; y++)
- {
- gimp_pixel_rgn_get_row (&srcPR, src, x1, y + y1, width);
- memcpy(preview_cache + (y*width*bpp),src,width*bpp);
- }
-
- for (y = 0; y < height; y++)
- {
- preview_do_row(y,width,even,odd,preview_cache + (y*width*bpp));
- }
-
- g_free (even);
- g_free (odd);
- g_free (src);
- }
-