/* Sparkle --- image filter plug-in for The Gimp image manipulation program * Copyright (C) 1996 by John Beale; ported to Gimp by Michael J. Hammel; * It has been optimized a little, bugfixed and modified by Martin Weber * for additional functionality. * * 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. * * You can contact Michael at mjhammel@csn.net * You can contact Martin at martin.weber@usa.net * Note: set tabstops to 3 to make this more readable. */ /* * Sparkle 1.26 - simulate pixel bloom and diffraction effects */ #include "config.h" #include #include #include #include #include #include #include #include #include "libgimp/stdplugins-intl.h" #define SCALE_WIDTH 175 #define MAX_CHANNELS 4 #define PSV 2 /* point spread value */ #define EPSILON 0.001 #define SQR(a) ((a) * (a)) #define NATURAL 0 #define FOREGROUND 1 #define BACKGROUND 2 typedef struct { gdouble lum_threshold; gdouble flare_inten; gdouble spike_len; gdouble spike_pts; gdouble spike_angle; gdouble density; gdouble opacity; gdouble random_hue; gdouble random_saturation; gint preserve_luminosity; gint invers; gint border; gint colortype; } SparkleVals; typedef struct { gint run; } SparkleInterface; /* Declare local functions. */ static void query (void); static void run (char *name, int nparams, GParam *param, int *nreturn_vals, GParam **return_vals); static void sparkle_toggle_update (GtkWidget *widget, gpointer data); static gint sparkle_dialog (void); static gint compute_luminosity (guchar * pixel, gint gray, gint has_alpha); static gint compute_lum_threshold (GDrawable * drawable, gdouble percentile); static void sparkle (GDrawable * drawable, gint threshold); static void fspike (GPixelRgn * dest_rgn, gint gray, gint x1, gint y1, gint x2, gint y2, gdouble xr, gdouble yr, gint tile_width, gint tile_height, gdouble inten, gdouble length, gdouble angle); static GTile* rpnt (GDrawable * drawable, GTile * tile, gint x1, gint y1, gint x2, gint y2, gdouble xr, gdouble yr, gint tile_width, gint tile_height, gint * row, gint * col, gint bytes, gdouble inten, guchar color[MAX_CHANNELS]); static void sparkle_ok_callback (GtkWidget *widget, gpointer data); static void sparkle_scale_update (GtkAdjustment *adjustment, double *scale_val); GPlugInInfo PLUG_IN_INFO = { NULL, /* init_proc */ NULL, /* quit_proc */ query, /* query_proc */ run, /* run_proc */ }; static SparkleVals svals = { 0.001, /* luminosity threshold */ 0.5, /* flare intensity */ 20.0, /* spike length */ 4.0, /* spike points */ 15.0, /* spike angle */ 1.0, /* spike density */ 1.0, /* opacity */ 0.0, /* random hue */ 0.0, /* random saturation */ FALSE, /* preserve_luminosity */ FALSE, /* invers */ FALSE, /* border */ NATURAL /* colortype */ }; static SparkleInterface sint = { FALSE /* run */ }; static gint num_sparkles; MAIN () static void query (void) { static GParamDef args[] = { { PARAM_INT32, "run_mode", "Interactive, non-interactive" }, { PARAM_IMAGE, "image", "Input image (unused)" }, { PARAM_DRAWABLE, "drawable", "Input drawable" }, { PARAM_FLOAT, "lum_threshold", "Luminosity threshold (0.0 - 1.0)" }, { PARAM_FLOAT, "flare_inten", "Flare intensity (0.0 - 1.0)" }, { PARAM_INT32, "spike_len", "Spike length (in pixels)" }, { PARAM_INT32, "spike_pts", "# of spike points" }, { PARAM_INT32, "spike_angle", "Spike angle (0-360 degrees, -1: random)" }, { PARAM_FLOAT, "density", "Spike density (0.0 - 1.0)" }, { PARAM_FLOAT, "opacity", "Opacity (0.0 - 1.0)" }, { PARAM_FLOAT, "random_hue", "Random hue (0.0 - 1.0)" }, { PARAM_FLOAT, "random_saturation", "Random saturation (0.0 - 1.0)" }, { PARAM_INT32, "preserve_luminosity", "Preserve luminosity (TRUE/FALSE)" }, { PARAM_INT32, "invers", "Invers (TRUE/FALSE)" }, { PARAM_INT32, "border", "Add border (TRUE/FALSE)" }, { PARAM_INT32, "colortype", "Color of sparkles: { NATURAL (0), FOREGROUND (1), BACKGROUND (2) }" } }; static GParamDef *return_vals = NULL; static int nargs = sizeof (args) / sizeof (args[0]); static int nreturn_vals = 0; INIT_I18N(); gimp_install_procedure ("plug_in_sparkle", _("Simulates pixel bloom and diffraction effects"), "No help yet", "John Beale, & (ported to GIMP v0.54) Michael J. Hammel & ted to GIMP v1.0) Spencer Kimball", "John Beale", "Version 1.26, December 1998", N_("/Filters/Light Effects/Sparkle..."), "RGB*, GRAY*", PROC_PLUG_IN, nargs, nreturn_vals, args, return_vals); } static void run (char *name, int nparams, GParam *param, int *nreturn_vals, GParam **return_vals) { static GParam values[1]; GDrawable *drawable; GRunModeType run_mode; GStatusType status = STATUS_SUCCESS; gint threshold, x1, y1, x2, y2; run_mode = param[0].data.d_int32; *nreturn_vals = 1; *return_vals = values; values[0].type = PARAM_STATUS; values[0].data.d_status = status; switch (run_mode) { case RUN_INTERACTIVE: INIT_I18N_UI(); /* Possibly retrieve data */ gimp_get_data ("plug_in_sparkle", &svals); /* First acquire information with a dialog */ if (! sparkle_dialog ()) return; break; case RUN_NONINTERACTIVE: INIT_I18N(); /* Make sure all the arguments are there! */ if (nparams != 16) status = STATUS_CALLING_ERROR; if (status == STATUS_SUCCESS) { svals.lum_threshold = param[3].data.d_float; svals.flare_inten = param[4].data.d_float; svals.spike_len = param[5].data.d_int32; svals.spike_pts = param[6].data.d_int32; svals.spike_angle = param[7].data.d_int32; svals.density = param[8].data.d_float; svals.opacity = param[9].data.d_float; svals.random_hue = param[10].data.d_float; svals.random_saturation = param[11].data.d_float; svals.preserve_luminosity = (param[12].data.d_int32) ? TRUE : FALSE; svals.invers = (param[13].data.d_int32) ? TRUE : FALSE; svals.border = (param[14].data.d_int32) ? TRUE : FALSE; svals.colortype = param[15].data.d_int32; } if (status == STATUS_SUCCESS && (svals.lum_threshold < 0.0 || svals.lum_threshold > 1.0)) status = STATUS_CALLING_ERROR; if (status == STATUS_SUCCESS && (svals.flare_inten < 0.0 || svals.flare_inten > 1.0)) status = STATUS_CALLING_ERROR; if (status == STATUS_SUCCESS && (svals.spike_len < 0)) status = STATUS_CALLING_ERROR; if (status == STATUS_SUCCESS && (svals.spike_pts < 0)) status = STATUS_CALLING_ERROR; if (status == STATUS_SUCCESS && (svals.spike_angle < -1 || svals.spike_angle > 360)) status = STATUS_CALLING_ERROR; if (status == STATUS_SUCCESS && (svals.density < 0.0 || svals.density > 1.0)) status = STATUS_CALLING_ERROR; if (status == STATUS_SUCCESS && (svals.opacity < 0.0 || svals.opacity > 1.0)) status = STATUS_CALLING_ERROR; if (status == STATUS_SUCCESS && (svals.random_hue < 0.0 || svals.random_hue > 1.0)) status = STATUS_CALLING_ERROR; if (status == STATUS_SUCCESS && (svals.random_saturation < 0.0 || svals.random_saturation > 1.0)) status = STATUS_CALLING_ERROR; if (status == STATUS_SUCCESS && (svals.colortype < NATURAL || svals.colortype > BACKGROUND)) status = STATUS_CALLING_ERROR; break; case RUN_WITH_LAST_VALS: INIT_I18N(); /* Possibly retrieve data */ gimp_get_data ("plug_in_sparkle", &svals); break; default: break; } /* Get the specified drawable */ drawable = gimp_drawable_get (param[2].data.d_drawable); /* 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 ( _("Sparkling...")); gimp_tile_cache_ntiles (2 * (drawable->width / gimp_tile_width () + 1)); if (svals.border == FALSE) /* compute the luminosity which exceeds the luminosity threshold */ threshold = compute_lum_threshold (drawable, svals.lum_threshold); else { gimp_drawable_mask_bounds (drawable->id, &x1, &y1, &x2, &y2); num_sparkles = 2 * (x2 - x1 + y2 - y1); threshold = 255; } sparkle (drawable, threshold); if (run_mode != RUN_NONINTERACTIVE) gimp_displays_flush (); /* Store mvals data */ if (run_mode == RUN_INTERACTIVE) gimp_set_data ("plug_in_sparkle", &svals, sizeof (SparkleVals)); } else { /* gimp_message ("sparkle: cannot operate on indexed color images"); */ status = STATUS_EXECUTION_ERROR; } values[0].data.d_status = status; gimp_drawable_detach (drawable); } static gint sparkle_dialog (void) { GtkWidget *dlg; GtkWidget *main_vbox; GtkWidget *vbox; GtkWidget *label; GtkWidget *scale; GtkWidget *frame; GtkWidget *table; GtkWidget *toggle; GtkWidget *sep; GtkObject *scale_data; GSList *group = NULL; gchar **argv; gint argc; gint use_natural = (svals.colortype == NATURAL); gint use_foreground = (svals.colortype == FOREGROUND); gint use_background = (svals.colortype == BACKGROUND); argc = 1; argv = g_new (gchar *, 1); argv[0] = g_strdup ("sparkle"); gtk_init (&argc, &argv); gtk_rc_parse (gimp_gtkrc ()); dlg = gimp_dialog_new (_("Sparkle"), "sparkle", gimp_plugin_help_func, "filters/sparkle.html", GTK_WIN_POS_MOUSE, FALSE, TRUE, FALSE, _("OK"), sparkle_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); gimp_help_init (); /* 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), 6); gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dlg)->vbox), frame, TRUE, TRUE, 0); gtk_widget_show (frame); main_vbox = gtk_vbox_new (FALSE, 4); gtk_container_set_border_width (GTK_CONTAINER (main_vbox), 4); gtk_container_add (GTK_CONTAINER (frame), main_vbox); gtk_widget_show (main_vbox); table = gtk_table_new (9, 2, FALSE); gtk_table_set_col_spacings (GTK_TABLE (table), 4); gtk_table_set_row_spacings (GTK_TABLE (table), 2); gtk_box_pack_start (GTK_BOX (main_vbox), table, FALSE, FALSE, 0); gtk_widget_show (table); label = gtk_label_new (_("Luminosity Threshold:")); gtk_misc_set_alignment (GTK_MISC (label), 1.0, 1.0); gtk_table_attach (GTK_TABLE (table), label, 0, 1, 0, 1, GTK_FILL, GTK_FILL, 0, 0); scale_data = gtk_adjustment_new (svals.lum_threshold, 0.0, 0.1, 0.001, 0.001, 0.0); scale = gtk_hscale_new (GTK_ADJUSTMENT (scale_data)); gtk_widget_set_usize (scale, SCALE_WIDTH, 0); gtk_table_attach (GTK_TABLE (table), scale, 1, 2, 0, 1, GTK_FILL, 0, 0, 0); gtk_scale_set_value_pos (GTK_SCALE (scale), GTK_POS_TOP); gtk_scale_set_digits (GTK_SCALE (scale), 3); gtk_range_set_update_policy (GTK_RANGE (scale), GTK_UPDATE_DELAYED); gtk_signal_connect (GTK_OBJECT (scale_data), "value_changed", (GtkSignalFunc) sparkle_scale_update, &svals.lum_threshold); gtk_widget_show (label); gtk_widget_show (scale); gimp_help_set_help_data (scale, _("Adjust the Luminosity Threshold"), NULL); label = gtk_label_new (_("Flare Intensity:")); gtk_misc_set_alignment (GTK_MISC (label), 1.0, 1.0); gtk_table_attach (GTK_TABLE (table), label, 0, 1, 1, 2, GTK_FILL, GTK_FILL, 0, 0); scale_data = gtk_adjustment_new (svals.flare_inten, 0.0, 1.0, 0.01, 0.01, 0.0); scale = gtk_hscale_new (GTK_ADJUSTMENT (scale_data)); gtk_widget_set_usize (scale, SCALE_WIDTH, 0); gtk_table_attach (GTK_TABLE (table), scale, 1, 2, 1, 2, GTK_FILL, 0, 0, 0); gtk_scale_set_value_pos (GTK_SCALE (scale), GTK_POS_TOP); gtk_scale_set_digits (GTK_SCALE (scale), 2); gtk_range_set_update_policy (GTK_RANGE (scale), GTK_UPDATE_DELAYED); gtk_signal_connect (GTK_OBJECT (scale_data), "value_changed", (GtkSignalFunc) sparkle_scale_update, &svals.flare_inten); gtk_widget_show (label); gtk_widget_show (scale); gimp_help_set_help_data (scale, _("Adjust the Flare Intensity"), NULL); label = gtk_label_new (_("Spike Length:")); gtk_misc_set_alignment (GTK_MISC (label), 1.0, 1.0); gtk_table_attach (GTK_TABLE (table), label, 0, 1, 2, 3, GTK_FILL, GTK_FILL, 0, 0); scale_data = gtk_adjustment_new (svals.spike_len, 1, 100, 1, 1, 0); scale = gtk_hscale_new (GTK_ADJUSTMENT (scale_data)); gtk_widget_set_usize (scale, SCALE_WIDTH, 0); gtk_table_attach (GTK_TABLE (table), scale, 1, 2, 2, 3, GTK_FILL, 0, 0, 0); gtk_scale_set_value_pos (GTK_SCALE (scale), GTK_POS_TOP); gtk_scale_set_digits (GTK_SCALE (scale), 0); gtk_range_set_update_policy (GTK_RANGE (scale), GTK_UPDATE_DELAYED); gtk_signal_connect (GTK_OBJECT (scale_data), "value_changed", (GtkSignalFunc) sparkle_scale_update, &svals.spike_len); gtk_widget_show (label); gtk_widget_show (scale); gimp_help_set_help_data (scale, _("Adjust the Spike Length"), NULL); label = gtk_label_new (_("Spike Points:")); gtk_misc_set_alignment (GTK_MISC (label), 1.0, 1.0); gtk_table_attach (GTK_TABLE (table), label, 0, 1, 3, 4, GTK_FILL, GTK_FILL, 0, 0); scale_data = gtk_adjustment_new (svals.spike_pts, 0, 16, 1, 1, 0); scale = gtk_hscale_new (GTK_ADJUSTMENT (scale_data)); gtk_widget_set_usize (scale, SCALE_WIDTH, 0); gtk_table_attach (GTK_TABLE (table), scale, 1, 2, 3, 4, GTK_FILL, 0, 0, 0); gtk_scale_set_value_pos (GTK_SCALE (scale), GTK_POS_TOP); gtk_scale_set_digits (GTK_SCALE (scale), 0); gtk_range_set_update_policy (GTK_RANGE (scale), GTK_UPDATE_DELAYED); gtk_signal_connect (GTK_OBJECT (scale_data), "value_changed", (GtkSignalFunc) sparkle_scale_update, &svals.spike_pts); gtk_widget_show (label); gtk_widget_show (scale); gimp_help_set_help_data (scale, _("Adjust the Number of Spike Points"), NULL); label = gtk_label_new (_("Spike Angle (-1: Random):")); gtk_misc_set_alignment (GTK_MISC (label), 1.0, 1.0); gtk_table_attach (GTK_TABLE (table), label, 0, 1, 4, 5, GTK_FILL, GTK_FILL, 0, 0); scale_data = gtk_adjustment_new (svals.spike_angle, -1, 360, 5, 5, 0); scale = gtk_hscale_new (GTK_ADJUSTMENT (scale_data)); gtk_widget_set_usize (scale, SCALE_WIDTH, 0); gtk_table_attach (GTK_TABLE (table), scale, 1, 2, 4, 5, GTK_FILL, 0, 0, 0); gtk_scale_set_value_pos (GTK_SCALE (scale), GTK_POS_TOP); gtk_scale_set_digits (GTK_SCALE (scale), 0); gtk_range_set_update_policy (GTK_RANGE (scale), GTK_UPDATE_DELAYED); gtk_signal_connect (GTK_OBJECT (scale_data), "value_changed", (GtkSignalFunc) sparkle_scale_update, &svals.spike_angle); gtk_widget_show (label); gtk_widget_show (scale); gimp_help_set_help_data (scale, _("Adjust the Spike Angle " "(-1 means a Random Angle is choosen)"), NULL); label = gtk_label_new ( _("Spike Density:")); gtk_misc_set_alignment (GTK_MISC (label), 1.0, 1.0); gtk_table_attach (GTK_TABLE (table), label, 0, 1, 5, 6, GTK_FILL, GTK_FILL, 0, 0); scale_data = gtk_adjustment_new (svals.density, 0.0, 1.0, 0.01, 0.01, 0.0); scale = gtk_hscale_new (GTK_ADJUSTMENT (scale_data)); gtk_widget_set_usize (scale, SCALE_WIDTH, 0); gtk_table_attach (GTK_TABLE (table), scale, 1, 2, 5, 6, GTK_FILL, 0, 0, 0); gtk_scale_set_value_pos (GTK_SCALE (scale), GTK_POS_TOP); gtk_scale_set_digits (GTK_SCALE (scale), 2); gtk_range_set_update_policy (GTK_RANGE (scale), GTK_UPDATE_DELAYED); gtk_signal_connect (GTK_OBJECT (scale_data), "value_changed", (GtkSignalFunc) sparkle_scale_update, &svals.density); gtk_widget_show (label); gtk_widget_show (scale); gimp_help_set_help_data (scale, _("Adjust the Spike Density"), NULL); label = gtk_label_new (_("Opacity:")); gtk_misc_set_alignment (GTK_MISC (label), 1.0, 1.0); gtk_table_attach (GTK_TABLE (table), label, 0, 1, 6, 7, GTK_FILL, GTK_FILL, 0, 0); scale_data = gtk_adjustment_new (svals.opacity, 0.0, 1.0, 0.01, 0.01, 0.0); scale = gtk_hscale_new (GTK_ADJUSTMENT (scale_data)); gtk_widget_set_usize (scale, SCALE_WIDTH, 0); gtk_table_attach (GTK_TABLE (table), scale, 1, 2, 6, 7, GTK_FILL, 0, 0, 0); gtk_scale_set_value_pos (GTK_SCALE (scale), GTK_POS_TOP); gtk_scale_set_digits (GTK_SCALE (scale), 2); gtk_range_set_update_policy (GTK_RANGE (scale), GTK_UPDATE_DELAYED); gtk_signal_connect (GTK_OBJECT (scale_data), "value_changed", (GtkSignalFunc) sparkle_scale_update, &svals.opacity); gtk_widget_show (label); gtk_widget_show (scale); gimp_help_set_help_data (scale, _("Adjust the Opacity of the Spikes"), NULL); label = gtk_label_new (_("Random Hue:")); gtk_misc_set_alignment (GTK_MISC (label), 1.0, 1.0); gtk_table_attach (GTK_TABLE (table), label, 0, 1, 7, 8, GTK_FILL, GTK_FILL, 0, 0); scale_data = gtk_adjustment_new (svals.random_hue, 0.0, 1.0, 0.01, 0.01, 0.0); scale = gtk_hscale_new (GTK_ADJUSTMENT (scale_data)); gtk_widget_set_usize (scale, SCALE_WIDTH, 0); gtk_table_attach (GTK_TABLE (table), scale, 1, 2, 7, 8, GTK_FILL, 0, 0, 0); gtk_scale_set_value_pos (GTK_SCALE (scale), GTK_POS_TOP); gtk_scale_set_digits (GTK_SCALE (scale), 2); gtk_range_set_update_policy (GTK_RANGE (scale), GTK_UPDATE_DELAYED); gtk_signal_connect (GTK_OBJECT (scale_data), "value_changed", (GtkSignalFunc) sparkle_scale_update, &svals.random_hue); gtk_widget_show (label); gtk_widget_show (scale); gimp_help_set_help_data (scale, _("Adjust the Value how much the Hue should " "be changed randomly"), NULL); label = gtk_label_new (_("Random Saturation:")); gtk_misc_set_alignment (GTK_MISC (label), 1.0, 1.0); gtk_table_attach (GTK_TABLE (table), label, 0, 1, 8, 9, GTK_FILL, GTK_FILL, 0, 0); scale_data = gtk_adjustment_new (svals.random_saturation, 0.0, 1.0, 0.01, 0.01, 0.0); scale = gtk_hscale_new (GTK_ADJUSTMENT (scale_data)); gtk_widget_set_usize (scale, SCALE_WIDTH, 0); gtk_table_attach (GTK_TABLE (table), scale, 1, 2, 8, 9, GTK_FILL, 0, 0, 0); gtk_scale_set_value_pos (GTK_SCALE (scale), GTK_POS_TOP); gtk_scale_set_digits (GTK_SCALE (scale), 2); gtk_range_set_update_policy (GTK_RANGE (scale), GTK_UPDATE_DELAYED); gtk_signal_connect (GTK_OBJECT (scale_data), "value_changed", (GtkSignalFunc) sparkle_scale_update, &svals.random_saturation); gtk_widget_show (label); gtk_widget_show (scale); gimp_help_set_help_data (scale, _("Adjust the Value how much the Saturation " "should be changed randomly"), NULL); sep = gtk_hseparator_new (); gtk_box_pack_start (GTK_BOX (main_vbox), sep, FALSE, FALSE, 0); gtk_widget_show (sep); vbox = gtk_vbox_new (FALSE, 2); gtk_box_pack_start (GTK_BOX (main_vbox), vbox, FALSE, FALSE, 0); gtk_widget_show (vbox); toggle = gtk_check_button_new_with_label (_("Preserve Luminosity")); gtk_box_pack_start (GTK_BOX (vbox), toggle, FALSE, FALSE, 0); gtk_toggle_button_set_state (GTK_TOGGLE_BUTTON (toggle), svals.preserve_luminosity); gtk_signal_connect (GTK_OBJECT (toggle), "toggled", (GtkSignalFunc) sparkle_toggle_update, &svals.preserve_luminosity); gtk_widget_show (toggle); gimp_help_set_help_data (toggle, _("Should the Luminosity be preserved?"), NULL); toggle = gtk_check_button_new_with_label (_("Inverse")); gtk_box_pack_start (GTK_BOX (vbox), toggle, FALSE, FALSE, 0); gtk_toggle_button_set_state (GTK_TOGGLE_BUTTON (toggle), svals.invers); gtk_signal_connect (GTK_OBJECT (toggle), "toggled", (GtkSignalFunc) sparkle_toggle_update, &svals.invers); gtk_widget_show (toggle); gimp_help_set_help_data (toggle, _("Should an Inverse Effect be done?"), NULL); toggle = gtk_check_button_new_with_label (_("Add Border")); gtk_box_pack_start (GTK_BOX (vbox), toggle, FALSE, FALSE, 0); gtk_toggle_button_set_state (GTK_TOGGLE_BUTTON (toggle), svals.border); gtk_signal_connect (GTK_OBJECT (toggle), "toggled", (GtkSignalFunc) sparkle_toggle_update, &svals.border); gtk_widget_show (toggle); gimp_help_set_help_data (toggle, _("Draw a Border of Spikes around the Image"), NULL); sep = gtk_hseparator_new (); gtk_box_pack_start (GTK_BOX (vbox), sep, FALSE, FALSE, 0); gtk_widget_show (sep); /* colortype */ toggle = gtk_radio_button_new_with_label (group, _("Natural Color")); gtk_box_pack_start (GTK_BOX (vbox), toggle, FALSE, FALSE, 0); group = gtk_radio_button_group (GTK_RADIO_BUTTON (toggle)); gtk_toggle_button_set_state (GTK_TOGGLE_BUTTON (toggle), use_natural); gtk_signal_connect (GTK_OBJECT (toggle), "toggled", (GtkSignalFunc) sparkle_toggle_update, &use_natural); gtk_widget_show (toggle); gimp_help_set_help_data (toggle, _("Use the Color of the Image"), NULL); toggle = gtk_radio_button_new_with_label (group, _("Foreground Color")); gtk_box_pack_start (GTK_BOX (vbox), toggle, FALSE, FALSE, 0); group = gtk_radio_button_group (GTK_RADIO_BUTTON (toggle)); gtk_toggle_button_set_state (GTK_TOGGLE_BUTTON (toggle), use_foreground); gtk_signal_connect (GTK_OBJECT (toggle), "toggled", (GtkSignalFunc) sparkle_toggle_update, &use_foreground); gtk_widget_show (toggle); gimp_help_set_help_data (toggle, _("Use the Foreground Color"), NULL); toggle = gtk_radio_button_new_with_label (group, _("Background Color")); gtk_box_pack_start (GTK_BOX (vbox), toggle, FALSE, FALSE, 0); group = gtk_radio_button_group (GTK_RADIO_BUTTON (toggle)); gtk_toggle_button_set_state (GTK_TOGGLE_BUTTON (toggle), use_background); gtk_signal_connect (GTK_OBJECT (toggle), "toggled", (GtkSignalFunc) sparkle_toggle_update, &use_background); gtk_widget_show (toggle); gimp_help_set_help_data (toggle, _("Use the Background Color"), NULL); gtk_widget_show (dlg); gtk_main (); gdk_flush (); /* determine colortype */ if (use_natural) svals.colortype = NATURAL; else if (use_foreground) svals.colortype = FOREGROUND; else if (use_background) svals.colortype = BACKGROUND; return sint.run; } static gint compute_luminosity (guchar *pixel, gint gray, gint has_alpha) { gint pixel0, pixel1, pixel2; if (svals.invers == FALSE) { pixel0 = pixel[0]; pixel1 = pixel[1]; pixel2 = pixel[2]; } else { pixel0 = 255 - pixel[0]; pixel1 = 255 - pixel[1]; pixel2 = 255 - pixel[2]; } if (gray) { if (has_alpha) return (pixel0 * pixel1) / 255; else return (pixel0); } else { gint min, max; min = MIN (pixel0, pixel1); min = MIN (min, pixel2); max = MAX (pixel0, pixel1); max = MAX (max, pixel2); if (has_alpha) return ((min + max) * pixel[3]) / 510; else return (min + max) / 2; } } static gint compute_lum_threshold (GDrawable *drawable, gdouble percentile) { GPixelRgn src_rgn; gpointer pr; guchar *data; gint values[256]; gint total, sum; gint size; gint gray; gint has_alpha; gint i; gint x1, y1, x2, y2; /* zero out the luminosity values array */ memset(values,0,sizeof(gint)*256); gimp_drawable_mask_bounds (drawable->id, &x1, &y1, &x2, &y2); gray = gimp_drawable_is_gray (drawable->id); has_alpha = gimp_drawable_has_alpha (drawable->id); gimp_pixel_rgn_init (&src_rgn, drawable, x1, y1, (x2 - x1), (y2 - y1), FALSE, FALSE); for (pr = gimp_pixel_rgns_register (1, &src_rgn); pr != NULL; pr = gimp_pixel_rgns_process (pr)) { data = src_rgn.data; size = src_rgn.w * src_rgn.h; while (size--) { values [compute_luminosity (data, gray, has_alpha)]++; data += src_rgn.bpp; } } total = (x2 - x1) * (y2 - y1); sum = 0; for (i = 255; i >= 0; i--) { sum += values[i]; if ((gdouble) sum / (gdouble) total > percentile) { num_sparkles = sum; return i; } } return 0; } static void sparkle (GDrawable *drawable, gint threshold) { GPixelRgn src_rgn, dest_rgn; guchar *src, *dest; gdouble nfrac, length, inten, spike_angle; gint cur_progress, max_progress; gint x1, y1, x2, y2; gint size, lum, x, y, b; gint gray; gint has_alpha, alpha; gpointer pr; guchar *tmp1; gint tile_width, tile_height; gimp_drawable_mask_bounds (drawable->id, &x1, &y1, &x2, &y2); gray = gimp_drawable_is_gray (drawable->id); has_alpha = gimp_drawable_has_alpha (drawable->id); alpha = (has_alpha) ? drawable->bpp - 1 : drawable->bpp; tile_width = gimp_tile_width(); tile_height = gimp_tile_height(); /* initialize the progress dialog */ cur_progress = 0; max_progress = num_sparkles; 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); for (pr = gimp_pixel_rgns_register (2, &src_rgn, &dest_rgn); pr != NULL; pr = gimp_pixel_rgns_process (pr)) { src = src_rgn.data; dest = dest_rgn.data; size = src_rgn.w * src_rgn.h; while (size --) { if(has_alpha && src[alpha] == 0) { memset(dest, 0, alpha * sizeof(guchar)); dest += alpha; } else { for (b = 0, tmp1 = src; b < alpha; b++) { *dest++ = *tmp1++; } } if (has_alpha) *dest++ = src[alpha]; src += src_rgn.bpp; } } /* add effects to new image based on intensity of old pixels */ 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); for (pr = gimp_pixel_rgns_register (2, &src_rgn, &dest_rgn); pr != NULL; pr = gimp_pixel_rgns_process (pr)) { src = src_rgn.data; for (y = 0; y < src_rgn.h; y++) for (x = 0; x < src_rgn.w; x++) { if (svals.border) { if (x + src_rgn.x == 0 || y + src_rgn.y == 0 || x + src_rgn.x == drawable->width - 1 || y + src_rgn.y == drawable->height - 1) lum = 255; else lum = 0; } else lum = compute_luminosity (src, gray, has_alpha); if (lum >= threshold) { nfrac = fabs ((gdouble) (lum + 1 - threshold) / (gdouble) (256 - threshold)); length = (gdouble) svals.spike_len * (gdouble) pow (nfrac, 0.8); inten = svals.flare_inten * pow (nfrac, 1.0); /* fspike im x,y intens rlength angle */ if (svals.spike_pts > 0) { /* major spikes */ if (svals.spike_angle == -1) spike_angle = 360.0 * rand () / RAND_MAX; else spike_angle = svals.spike_angle; if (rand() <= RAND_MAX * svals.density) { fspike (&dest_rgn, gray, x1, y1, x2, y2, x + src_rgn.x, y + src_rgn.y, tile_width, tile_height, inten, length, spike_angle); /* minor spikes */ fspike (&dest_rgn, gray, x1, y1, x2, y2, x + src_rgn.x, y + src_rgn.y, tile_width, tile_height, inten * 0.7, length * 0.7, ((gdouble) spike_angle + 180.0 / svals.spike_pts)); } } cur_progress ++; if ((cur_progress % 5) == 0) gimp_progress_update ((double) cur_progress / (double) max_progress); } src += src_rgn.bpp; } } gimp_progress_update (1.0); /* 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)); } static inline GTile * rpnt (GDrawable *drawable, GTile *tile, gint x1, gint y1, gint x2, gint y2, gdouble xr, gdouble yr, gint tile_width, gint tile_height, gint *row, gint *col, gint bytes, gdouble inten, guchar color[MAX_CHANNELS]) { gint x, y, b; gdouble dx, dy, rs, val; guchar *pixel; gdouble new; gint newcol, newrow; gint newcoloff, newrowoff; x = (int) (xr); /* integer coord. to upper left of real point */ y = (int) (yr); if (x >= x1 && y >= y1 && x < x2 && y < y2) { newcol = x / tile_width; newcoloff = x % tile_width; newrow = y / tile_height; newrowoff = y % tile_height; if ((newcol != *col) || (newrow != *row)) { *col = newcol; *row = newrow; if (tile) gimp_tile_unref (tile, TRUE); tile = gimp_drawable_get_tile (drawable, TRUE, *row, *col); gimp_tile_ref (tile); } pixel = tile->data + tile->bpp * (tile->ewidth * newrowoff + newcoloff); dx = xr - x; dy = yr - y; rs = dx * dx + dy * dy; val = inten * exp (-rs / PSV); for (b = 0; b < bytes; b++) { if (svals.invers == FALSE) new = pixel[b]; else new = 255 - pixel[b]; if (svals.preserve_luminosity==TRUE) { if (new < color[b]) new *= (1.0 - val * svals.opacity); else { new -= val * color[b] * svals.opacity; if (new < 0.0) new = 0.0; } } new *= 1.0 - val * (1.0 - svals.opacity); new += val * color[b]; if (new > 255) new = 255; if (svals.invers != FALSE) pixel[b] = 255 - new; else pixel[b] = new; } } return tile; } static void fspike (GPixelRgn *dest_rgn, gint gray, gint x1, gint y1, gint x2, gint y2, gdouble xr, gdouble yr, gint tile_width, gint tile_height, gdouble inten, gdouble length, gdouble angle) { const gdouble efac = 2.0; gdouble xrt, yrt, dx, dy; gdouble rpos; gdouble in; gdouble theta; gdouble sfac; gint r, g, b; GTile *tile = NULL; gint row, col; gint i; gint bytes; gint x, y; gint ok; guchar pixel[MAX_CHANNELS]; guchar color[MAX_CHANNELS]; theta = angle; bytes = dest_rgn->bpp; row = -1; col = -1; /* draw the major spikes */ for (i = 0; i < svals.spike_pts; i++) { x = (int) (xr + 0.5); y = (int) (yr + 0.5); gimp_pixel_rgn_get_pixel (dest_rgn, pixel, x, y); switch (svals.colortype) { case FOREGROUND: gimp_palette_get_foreground (&color[0], &color[1], &color[2]); break; case BACKGROUND: gimp_palette_get_background (&color[0], &color[1], &color[2]); break; default: color[0] = pixel[0]; color[1] = pixel[1]; color[2] = pixel[2]; break; } if (svals.invers) { color[0] = 255 - color[0]; color[1] = 255 - color[1]; color[2] = 255 - color[2]; } if (svals.random_hue > 0.0 || svals.random_saturation > 0.0) { r = color[0]; g = color[1]; b = color[2]; gimp_rgb_to_hls(&r, &g, &b); r+= (svals.random_hue * ((gdouble) rand() / (gdouble) RAND_MAX - 0.5))*255; if (r >= 255.0) r -= 255.0; else if (r < 0) r += 255.0; b+= (svals.random_saturation * (2 * (gdouble) rand() / (gdouble) RAND_MAX - 1.0))*255; if (b > 1.0) b = 1.0; gimp_hls_to_rgb(&r, &g, &b); color[0] = r; color[1] = g; color[2] = b; } dx = 0.2 * cos (theta * G_PI / 180.0); dy = 0.2 * sin (theta * G_PI / 180.0); xrt = xr; yrt = yr; rpos = 0.2; do { sfac = inten * exp (-pow (rpos / length, efac)); ok = FALSE; in = 0.2 * sfac; if (in > 0.01) ok = TRUE; tile = rpnt (dest_rgn->drawable, tile, x1, y1, x2, y2, xrt, yrt, tile_width, tile_height, &row, &col, bytes, in, color); tile = rpnt (dest_rgn->drawable, tile, x1, y1, x2, y2, xrt + 1, yrt, tile_width, tile_height, &row, &col, bytes, in, color); tile = rpnt (dest_rgn->drawable, tile, x1, y1, x2, y2, xrt + 1, yrt + 1, tile_width, tile_height, &row, &col, bytes, in, color); tile = rpnt (dest_rgn->drawable, tile, x1, y1, x2, y2, xrt, yrt + 1, tile_width, tile_height, &row, &col, bytes, in, color); xrt += dx; yrt += dy; rpos += 0.2; } while (ok); theta += 360.0 / svals.spike_pts; } if (tile) gimp_tile_unref (tile, TRUE); } /* Sparkle interface functions */ static void sparkle_ok_callback (GtkWidget *widget, gpointer data) { sint.run = TRUE; gtk_widget_destroy (GTK_WIDGET (data)); } static void sparkle_scale_update (GtkAdjustment *adjustment, double *scale_val) { *scale_val = adjustment->value; } static void sparkle_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; }