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- /* The GIMP -- an image manipulation program
- * Copyright (C) 1995 Spencer Kimball and Peter Mattis
- * Copyright (C) 1997 Eiichi Takamori
- * Copyright (C) 1996, 1997 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.
- */
-
- /*
- * This plug-in creates a black-and-white 'engraved' version of an image.
- * Much of the code is stolen from the Pixelize plug-in.
- */
-
- #include "config.h"
-
- #include <stdio.h>
- #include <stdlib.h>
-
- #include <gtk/gtk.h>
-
- #include <libgimp/gimp.h>
- #include <libgimp/gimpui.h>
-
- #include "libgimp/stdplugins-intl.h"
-
-
- /* Some useful macros */
-
- #define SCALE_WIDTH 125
- #define TILE_CACHE_SIZE 16
-
- typedef struct
- {
- gint height;
- gint limit;
- } EngraveValues;
-
- typedef struct
- {
- gint run;
- } EngraveInterface;
-
- static void query (void);
- static void run (gchar *name,
- gint nparams,
- GimpParam *param,
- gint *nreturn_vals,
- GimpParam **return_vals);
-
- static gint engrave_dialog (void);
- static void engrave_ok_callback (GtkWidget *widget,
- gpointer data);
-
- static void engrave (GimpDrawable *drawable);
- static void engrave_large (GimpDrawable *drawable,
- gint height,
- gint limit);
- static void engrave_small (GimpDrawable *drawable,
- gint height,
- gint limit,
- gint tile_width);
- static void engrave_sub (gint height,
- gint limit,
- gint bpp,
- gint color_n);
-
- GimpPlugInInfo PLUG_IN_INFO =
- {
- NULL, /* init_proc */
- NULL, /* quit_proc */
- query, /* query_proc */
- run, /* run_proc */
- };
-
- static EngraveValues pvals =
- {
- 10
- };
-
- static EngraveInterface pint =
- {
- FALSE /* run */
- };
-
-
- 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, "height", "Resolution in pixels" },
- { GIMP_PDB_INT32, "limit", "If true, limit line width" }
- };
- static gint nargs = sizeof (args) / sizeof (args[0]);
-
- gimp_install_procedure ("plug_in_engrave",
- "Engrave the contents of the specified drawable",
- "Creates a black-and-white 'engraved' version of an image as seen in old illustrations",
- "Spencer Kimball & Peter Mattis, Eiichi Takamori, Torsten Martinsen",
- "Spencer Kimball & Peter Mattis, Eiichi Takamori, Torsten Martinsen",
- "1995,1996,1997",
- N_("<Image>/Filters/Distorts/Engrave..."),
- "RGBA, GRAYA",
- 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_engrave", &pvals);
-
- /* First acquire information with a dialog */
- if (!engrave_dialog ())
- {
- gimp_drawable_detach (drawable);
- return;
- }
- break;
-
- case GIMP_RUN_NONINTERACTIVE:
- INIT_I18N();
- /* Make sure all the arguments are there! */
- if (nparams != 5)
- status = GIMP_PDB_CALLING_ERROR;
- if (status == GIMP_PDB_SUCCESS)
- {
- pvals.height = param[3].data.d_int32;
- pvals.limit = (param[4].data.d_int32) ? TRUE : FALSE;
- }
- if ((status == GIMP_PDB_SUCCESS) &&
- pvals.height < 0)
- status = GIMP_PDB_CALLING_ERROR;
- break;
-
- case GIMP_RUN_WITH_LAST_VALS:
- INIT_I18N();
- /* Possibly retrieve data */
- gimp_get_data ("plug_in_engrave", &pvals);
- break;
-
- default:
- break;
- }
-
- if (status == GIMP_PDB_SUCCESS)
- {
- gimp_progress_init (_("Engraving..."));
- gimp_tile_cache_ntiles (TILE_CACHE_SIZE);
-
- engrave (drawable);
-
- if (run_mode != GIMP_RUN_NONINTERACTIVE)
- gimp_displays_flush ();
-
- /* Store data */
- if (run_mode == GIMP_RUN_INTERACTIVE)
- gimp_set_data ("plug_in_engrave", &pvals, sizeof (EngraveValues));
- }
- values[0].data.d_status = status;
-
- gimp_drawable_detach (drawable);
- }
-
- static gint
- engrave_dialog (void)
- {
- GtkWidget *dlg;
- GtkWidget *frame;
- GtkWidget *table;
- GtkWidget *toggle;
- GtkObject *adj;
-
- gimp_ui_init ("engrave", FALSE);
-
- dlg = gimp_dialog_new (_("Engrave"), "engrave",
- gimp_standard_help_func, "filters/engrave.html",
- GTK_WIN_POS_MOUSE,
- FALSE, TRUE, FALSE,
-
- _("OK"), engrave_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);
-
- /* 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 (GTK_DIALOG (dlg)->vbox), frame, TRUE, TRUE, 0);
-
- table = gtk_table_new (2, 3, FALSE);
- gtk_table_set_col_spacings (GTK_TABLE (table), 4);
- gtk_table_set_row_spacings (GTK_TABLE (table), 4);
- gtk_container_set_border_width (GTK_CONTAINER (table), 4);
- gtk_container_add (GTK_CONTAINER (frame), table);
-
- toggle = gtk_check_button_new_with_label (_("Limit Line Width"));
- 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),
- &pvals.limit);
- gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle), pvals.limit);
- gtk_widget_show (toggle);
-
- adj = gimp_scale_entry_new (GTK_TABLE (table), 0, 1,
- _("Height:"), SCALE_WIDTH, 0,
- pvals.height, 2.0, 16.0, 1.0, 4.0, 0,
- TRUE, 0, 0,
- NULL, NULL);
- gtk_signal_connect (GTK_OBJECT (adj), "value_changed",
- GTK_SIGNAL_FUNC (gimp_int_adjustment_update),
- &pvals.height);
-
- gtk_widget_show (frame);
- gtk_widget_show (table);
- gtk_widget_show (dlg);
-
- gtk_main ();
- gdk_flush ();
-
- return pint.run;
- }
-
- /* Engrave interface functions */
-
- static void
- engrave_ok_callback (GtkWidget *widget,
- gpointer data)
- {
- pint.run = TRUE;
-
- gtk_widget_destroy (GTK_WIDGET (data));
- }
-
- static void
- engrave (GimpDrawable *drawable)
- {
- gint tile_width;
- gint height;
- gint limit;
-
- tile_width = gimp_tile_width();
- height = (gint) pvals.height;
- limit = (gint) pvals.limit;
- if (height >= tile_width)
- engrave_large (drawable, height, limit);
- else
- engrave_small (drawable, height, limit, tile_width);
- }
-
- static void
- engrave_large (GimpDrawable *drawable,
- gint height,
- gint limit)
- {
- GimpPixelRgn src_rgn, dest_rgn;
- guchar *src_row, *dest_row;
- guchar *src, *dest;
- gulong *average;
- gint row, col, b, bpp;
- gint x, y, y_step, inten, v;
- gulong count;
- gint x1, y1, x2, y2;
- gint progress, max_progress;
- gpointer pr;
-
- gimp_drawable_mask_bounds(drawable->id, &x1, &y1, &x2, &y2);
-
- if (gimp_drawable_is_rgb(drawable->id))
- bpp = 3;
- else
- bpp = 1;
- average = g_new(gulong, bpp);
-
- /* Initialize progress */
- progress = 0;
- max_progress = 2 * (x2 - x1) * (y2 - y1);
-
- for (y = y1; y < y2; y += height - (y % height))
- {
- for (x = x1; x < x2; ++x)
- {
- y_step = height - (y % height);
- y_step = MIN(y_step, x2 - x);
-
- gimp_pixel_rgn_init(&src_rgn, drawable, x, y, 1, y_step, FALSE, FALSE);
- for (b = 0; b < bpp; b++)
- average[b] = 0;
- count = 0;
-
- for (pr = gimp_pixel_rgns_register(1, &src_rgn);
- pr != NULL;
- pr = gimp_pixel_rgns_process(pr))
- {
- src_row = src_rgn.data;
- for (row = 0; row < src_rgn.h; row++)
- {
- src = src_row;
- for (col = 0; col < src_rgn.w; col++)
- {
- for (b = 0; b < bpp; b++)
- average[b] += src[b];
- src += src_rgn.bpp;
- count += 1;
- }
- src_row += src_rgn.rowstride;
- }
- /* Update progress */
- progress += src_rgn.w * src_rgn.h;
- gimp_progress_update((double) progress / (double) max_progress);
- }
-
- if (count > 0)
- for (b = 0; b < bpp; b++)
- average[b] = (guchar) (average[b] / count);
-
- if (bpp < 3)
- inten = average[0]/254.0*height;
- else
- inten = INTENSITY(average[0],
- average[1],
- average[2])/254.0*height;
-
- gimp_pixel_rgn_init(&dest_rgn, drawable, x, y, 1, y_step, TRUE, TRUE);
- for (pr = gimp_pixel_rgns_register(1, &dest_rgn);
- pr != NULL;
- pr = gimp_pixel_rgns_process(pr))
- {
- dest_row = dest_rgn.data;
- for (row = 0; row < dest_rgn.h; row++)
- {
- dest = dest_row;
- v = inten > row ? 255 : 0;
- if (limit)
- {
- if (row == 0)
- v = 255;
- else if (row == height-1)
- v = 0;
- }
- for (b = 0; b < bpp; b++)
- dest[b] = v;
- dest_row += dest_rgn.rowstride;
- }
- /* Update progress */
- progress += dest_rgn.w * dest_rgn.h;
- gimp_progress_update((double) progress / (double) max_progress);
- }
- }
- }
-
- g_free(average);
-
- /* update the engraved region */
- gimp_drawable_flush(drawable);
- gimp_drawable_merge_shadow(drawable->id, TRUE);
- gimp_drawable_update(drawable->id, x1, y1, (x2 - x1), (y2 - y1));
- }
-
- typedef struct
- {
- gint x, y, h;
- gint width;
- guchar *data;
- } PixelArea;
-
- PixelArea area;
-
- static void
- engrave_small (GimpDrawable *drawable,
- gint height,
- gint limit,
- gint tile_width)
- {
- GimpPixelRgn src_rgn, dest_rgn;
- gint bpp, color_n;
- gint x1, y1, x2, y2;
- gint progress, max_progress;
-
- /*
- For speed efficiency, operates on PixelAreas, whose each width and
- height are less than tile size.
-
- If both ends of area cannot be divided by height ( as
- x1%height != 0 etc.), operates on the remainder pixels.
- */
-
- 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);
-
- bpp = drawable->bpp;
- if (gimp_drawable_is_rgb(drawable->id))
- color_n = 3;
- else
- color_n = 1;
-
- area.width = (tile_width / height) * height;
- area.data = g_new(guchar, (glong) bpp * area.width * area.width);
-
- for (area.y = y1; area.y < y2;
- area.y += area.width - (area.y % area.width))
- {
- area.h = area.width - (area.y % area.width);
- area.h = MIN(area.h, y2 - area.y);
- for (area.x = x1; area.x < x2; ++area.x)
- {
- gimp_pixel_rgn_get_rect(&src_rgn, area.data, area.x, area.y, 1, area.h);
-
- engrave_sub(height, limit, bpp, color_n);
-
- gimp_pixel_rgn_set_rect(&dest_rgn, area.data, area.x, area.y, 1, area.h);
-
- /* Update progress */
- progress += area.h;
- gimp_progress_update((double) progress / (double) max_progress);
- }
- }
-
- g_free(area.data);
-
- /* update the engraved region */
- gimp_drawable_flush(drawable);
- gimp_drawable_merge_shadow(drawable->id, TRUE);
- gimp_drawable_update(drawable->id, x1, y1, (x2 - x1), (y2 - y1));
- }
-
- static void
- engrave_sub (gint height,
- gint limit,
- gint bpp,
- gint color_n)
- {
- glong average[3]; /* color_n <= 3 */
- gint y, h, inten, v;
- guchar *buf_row, *buf;
- gint row;
- gint rowstride;
- gint count;
- gint i;
-
- /*
- Since there's so many nested FOR's,
- put a few of them here...
- */
-
- rowstride = bpp;
-
- for (y = area.y; y < area.y + area.h; y += height - (y % height))
- {
- h = height - (y % height);
- h = MIN(h, area.y + area.h - y);
-
- for (i = 0; i < color_n; i++)
- average[i] = 0;
- count = 0;
-
- /* Read */
- buf_row = area.data + (y - area.y) * rowstride;
-
- for (row = 0; row < h; row++)
- {
- buf = buf_row;
- for (i = 0; i < color_n; i++)
- average[i] += buf[i];
- count++;
- buf_row += rowstride;
- }
-
- /* Average */
- if (count > 0)
- for (i = 0; i < color_n; i++)
- average[i] /= count;
-
- if (bpp < 3)
- inten = average[0]/254.0*height;
- else
- inten = INTENSITY(average[0],
- average[1],
- average[2])/254.0*height;
-
- /* Write */
- buf_row = area.data + (y - area.y) * rowstride;
-
- for (row = 0; row < h; row++)
- {
- buf = buf_row;
- v = inten > row ? 255 : 0;
- if (limit)
- {
- if (row == 0)
- v = 255;
- else if (row == height-1)
- v = 0;
- }
- for (i = 0; i < color_n; i++)
- buf[i] = v;
- buf_row += rowstride;
- }
- }
- }
-