/* 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 #include #include #include #include #include "gtk/gtk.h" #include "libgimp/gimp.h" /* Some useful macros */ #ifndef M_PI #define M_PI 3.14159265358979323846 #endif /* M_PI */ #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 ", "Brian Degenhardt", "1997", "/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; }