mirror of https://github.com/GNOME/gimp.git
468 lines
12 KiB
C
468 lines
12 KiB
C
/*
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smooth palette - derive smooth palette from image
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Copyright (C) 1997 Scott Draves <spot@cs.cmu.edu>
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The GIMP -- an image manipulation program
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Copyright (C) 1995 Spencer Kimball and Peter Mattis
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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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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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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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#include "config.h"
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <gtk/gtk.h>
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#include <libgimp/gimp.h>
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#include <libgimp/gimpui.h>
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#include "libgimp/stdplugins-intl.h"
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/* Declare local functions. */
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static void query (void);
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static void run (const gchar *name,
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gint nparams,
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const GimpParam *param,
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gint *nreturn_vals,
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GimpParam **return_vals);
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static gboolean dialog (GimpDrawable *drawable);
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static gint32 doit (GimpDrawable *drawable,
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gint32 *layer_id);
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GimpPlugInInfo 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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MAIN ()
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static void
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query (void)
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{
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static GimpParamDef args[] =
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{
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{ GIMP_PDB_INT32, "run_mode", "Interactive, non-interactive" },
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{ GIMP_PDB_IMAGE, "image", "Input image (unused)" },
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{ GIMP_PDB_DRAWABLE, "drawable", "Input drawable" },
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{ GIMP_PDB_INT32, "width", "Width" },
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{ GIMP_PDB_INT32, "height", "Height" },
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{ GIMP_PDB_INT32, "ntries", "Search Depth" },
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{ GIMP_PDB_INT32, "show_image","Show Image?" }
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};
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static GimpParamDef return_vals[] =
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{
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{ GIMP_PDB_IMAGE, "new_image", "Output image" },
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{ GIMP_PDB_LAYER, "new_layer", "Output layer" }
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};
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gimp_install_procedure ("plug_in_smooth_palette",
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"derive smooth palette from image",
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"help!",
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"Scott Draves",
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"Scott Draves",
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"1997",
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N_("<Image>/Filters/Colors/Smoo_th Palette..."),
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"RGB*",
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GIMP_PLUGIN,
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G_N_ELEMENTS (args), G_N_ELEMENTS (return_vals),
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args, return_vals);
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}
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static struct
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{
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gint width;
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gint height;
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gint ntries;
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gint try_size;
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gint show_image;
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} config =
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{
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256,
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64,
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50,
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10000,
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1
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};
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static void
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run (const gchar *name,
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gint nparams,
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const GimpParam *param,
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gint *nreturn_vals,
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GimpParam **return_vals)
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{
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static GimpParam values[3];
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GimpRunMode run_mode;
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GimpPDBStatusType status = GIMP_PDB_SUCCESS;
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GimpDrawable *drawable;
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run_mode = param[0].data.d_int32;
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INIT_I18N ();
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*nreturn_vals = 3;
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*return_vals = values;
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values[0].type = GIMP_PDB_STATUS;
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values[0].data.d_status = status;
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values[1].type = GIMP_PDB_IMAGE;
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values[2].type = GIMP_PDB_LAYER;
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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 GIMP_RUN_INTERACTIVE:
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gimp_get_data ("plug_in_smooth_palette", &config);
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if (! dialog (drawable))
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return;
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break;
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case GIMP_RUN_NONINTERACTIVE:
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if (nparams != 7)
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{
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status = GIMP_PDB_CALLING_ERROR;
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}
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else
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{
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config.width = param[3].data.d_int32;
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config.height = param[4].data.d_int32;
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config.ntries = param[5].data.d_int32;
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config.show_image = param[6].data.d_int32 ? TRUE : FALSE;
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}
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if (status == GIMP_PDB_SUCCESS &&
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((config.width <= 0) || (config.height <= 0) || config.ntries <= 0))
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status = GIMP_PDB_CALLING_ERROR;
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break;
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case GIMP_RUN_WITH_LAST_VALS:
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/* Possibly retrieve data */
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gimp_get_data ("plug_in_smooth_palette", &config);
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break;
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default:
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break;
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}
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if (status == GIMP_PDB_SUCCESS)
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{
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if (gimp_drawable_is_rgb (drawable->drawable_id))
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{
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gimp_progress_init (_("Deriving Smooth Palette..."));
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gimp_tile_cache_ntiles (2 * (drawable->width + 1) /
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gimp_tile_width ());
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values[1].data.d_image = doit (drawable, &values[2].data.d_layer);
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if (run_mode == GIMP_RUN_INTERACTIVE)
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gimp_set_data ("plug_in_smooth_palette", &config, sizeof (config));
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if (config.show_image)
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gimp_display_new (values[1].data.d_image);
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}
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else
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{
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status = GIMP_PDB_EXECUTION_ERROR;
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}
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gimp_drawable_detach (drawable);
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}
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values[0].data.d_status = status;
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}
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static long
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pix_diff (guchar *pal,
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gint bpp,
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gint i,
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gint j)
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{
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glong r = 0;
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gint k;
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for (k = 0; k < bpp; k++)
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{
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gint p1 = pal[j * bpp + k];
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gint p2 = pal[i * bpp + k];
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r += (p1 - p2) * (p1 - p2);
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}
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return r;
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}
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static void
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pix_swap (guchar *pal,
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gint bpp,
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gint i,
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gint j)
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{
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gint k;
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for (k = 0; k < bpp; k++)
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{
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guchar t = pal[j * bpp + k];
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pal[j * bpp + k] = pal[i * bpp + k];
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pal[i * bpp + k] = t;
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}
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}
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static gint32
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doit (GimpDrawable *drawable,
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gint32 *layer_id)
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{
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gint32 new_image_id;
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GimpDrawable *new_layer;
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gint psize, i, j;
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guchar *pal;
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gint bpp = drawable->bpp;
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gint sel_x1, sel_x2, sel_y1, sel_y2;
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gint width, height;
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GimpPixelRgn pr;
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GRand *gr;
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gr = g_rand_new ();
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new_image_id = gimp_image_new (config.width, config.height, GIMP_RGB);
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*layer_id = gimp_layer_new (new_image_id, _("Background"),
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config.width, config.height,
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gimp_drawable_type (drawable->drawable_id),
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100, GIMP_NORMAL_MODE);
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gimp_image_add_layer (new_image_id, *layer_id, 0);
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new_layer = gimp_drawable_get (*layer_id);
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psize = config.width;
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pal = g_malloc (psize * bpp);
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gimp_drawable_mask_bounds (drawable->drawable_id,
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&sel_x1, &sel_y1, &sel_x2, &sel_y2);
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width = sel_x2 - sel_x1;
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height = sel_y2 - sel_y1;
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gimp_pixel_rgn_init (&pr, drawable, sel_x1, sel_y1, width, height,
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FALSE, FALSE);
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/* get initial palette */
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for (i = 0; i < psize; i++)
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{
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gint x = sel_x1 + g_rand_int_range (gr, 0, width);
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gint y = sel_y1 + g_rand_int_range (gr, 0, height);
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gimp_pixel_rgn_get_pixel (&pr, pal + bpp * i, x, y);
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}
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/* reorder */
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if (1)
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{
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guchar *pal_best;
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guchar *original;
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gdouble len_best = 0;
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gint try;
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pal_best = g_memdup (pal, bpp * psize);
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original = g_memdup (pal, bpp * psize);
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for (try = 0; try < config.ntries; try++)
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{
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gdouble len;
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if (!(try%5))
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gimp_progress_update (try / (double) config.ntries);
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memcpy (pal, original, bpp * psize);
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/* scramble */
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for (i = 1; i < psize; i++)
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pix_swap (pal, bpp, i, g_rand_int_range (gr, 0, psize));
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/* measure */
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len = 0.0;
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for (i = 1; i < psize; i++)
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len += pix_diff (pal, bpp, i, i-1);
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/* improve */
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for (i = 0; i < config.try_size; i++)
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{
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gint i0 = 1 + g_rand_int_range (gr, 0, psize-2);
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gint i1 = 1 + g_rand_int_range (gr, 0, psize-2);
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glong as_is, swapd;
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if (1 == (i0 - i1))
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{
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as_is = (pix_diff (pal, bpp, i1 - 1, i1) +
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pix_diff (pal, bpp, i0, i0 + 1));
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swapd = (pix_diff (pal, bpp, i1 - 1, i0) +
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pix_diff (pal, bpp, i1, i0 + 1));
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}
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else if (1 == (i1 - i0))
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{
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as_is = (pix_diff (pal, bpp, i0 - 1, i0) +
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pix_diff (pal, bpp, i1, i1 + 1));
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swapd = (pix_diff (pal, bpp, i0 - 1, i1) +
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pix_diff (pal, bpp, i0, i1 + 1));
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}
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else
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{
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as_is = (pix_diff (pal, bpp, i0, i0 + 1) +
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pix_diff (pal, bpp, i0, i0 - 1) +
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pix_diff (pal, bpp, i1, i1 + 1) +
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pix_diff (pal, bpp, i1, i1 - 1));
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swapd = (pix_diff (pal, bpp, i1, i0 + 1) +
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pix_diff (pal, bpp, i1, i0 - 1) +
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pix_diff (pal, bpp, i0, i1 + 1) +
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pix_diff (pal, bpp, i0, i1 - 1));
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}
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if (swapd < as_is)
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{
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pix_swap (pal, bpp, i0, i1);
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len += swapd - as_is;
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}
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}
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/* best? */
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if (0 == try || len < len_best)
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{
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memcpy (pal_best, pal, bpp * psize);
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len_best = len;
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}
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}
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memcpy (pal, pal_best, bpp * psize);
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g_free (pal_best);
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g_free (original);
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/* clean */
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for (i = 1; i < 4 * psize; i++)
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{
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glong as_is, swapd;
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gint i0 = 1 + g_rand_int_range (gr, 0, psize - 2);
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gint i1 = i0 + 1;
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as_is = (pix_diff (pal, bpp, i0 - 1, i0) +
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pix_diff (pal, bpp, i1, i1 + 1));
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swapd = (pix_diff (pal, bpp, i0 - 1, i1) +
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pix_diff (pal, bpp, i0, i1 + 1));
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if (swapd < as_is)
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{
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pix_swap (pal, bpp, i0, i1);
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len_best += swapd - as_is;
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}
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}
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}
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/* store smooth palette */
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gimp_pixel_rgn_init (&pr, new_layer, 0, 0,
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config.width, config.height,
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TRUE, FALSE);
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for (j = 0; j < config.height; j++)
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for (i = 0; i < config.width; i++)
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gimp_pixel_rgn_set_pixel (&pr, pal + bpp * i, i, j);
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g_free (pal);
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g_rand_free (gr);
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gimp_drawable_flush (new_layer);
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gimp_drawable_update(new_layer->drawable_id, 0, 0,
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config.width, config.height);
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gimp_image_undo_enable (new_image_id);
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return new_image_id;
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}
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static gboolean
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dialog (GimpDrawable *drawable)
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{
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GtkWidget *dlg;
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GtkWidget *frame;
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GtkWidget *spinbutton;
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GtkObject *adj;
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GtkWidget *sizeentry;
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guint32 image_id;
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GimpUnit unit;
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gdouble xres, yres;
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gboolean run;
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gimp_ui_init ("smooth_palette", FALSE);
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dlg = gimp_dialog_new (_("Smooth Palette"), "smooth_palette",
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NULL, 0,
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gimp_standard_help_func, "plug-in-smooth-palette",
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GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
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GTK_STOCK_OK, GTK_RESPONSE_OK,
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NULL);
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frame = gtk_frame_new (_("Parameter Settings"));
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gtk_container_set_border_width (GTK_CONTAINER (frame), 6);
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gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dlg)->vbox), frame, FALSE, FALSE, 0);
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gtk_widget_show (frame);
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image_id = gimp_drawable_get_image (drawable->drawable_id);
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unit = gimp_image_get_unit (image_id);
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gimp_image_get_resolution (image_id, &xres, &yres);
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sizeentry = gimp_coordinates_new (unit, "%a", TRUE, FALSE, 6,
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GIMP_SIZE_ENTRY_UPDATE_SIZE,
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FALSE, FALSE,
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_("_Width:"),
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config.width, xres,
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2, GIMP_MAX_IMAGE_SIZE,
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2, GIMP_MAX_IMAGE_SIZE,
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_("_Height:"),
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config.height, yres,
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1, GIMP_MAX_IMAGE_SIZE,
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1, GIMP_MAX_IMAGE_SIZE);
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gtk_container_add (GTK_CONTAINER (frame), sizeentry);
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gtk_widget_show (sizeentry);
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spinbutton = gimp_spin_button_new (&adj, config.ntries,
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1, 1024, 1, 10, 0, 1, 0);
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gimp_table_attach_aligned (GTK_TABLE (sizeentry), 0, 2,
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_("_Search Depth:"), 1.0, 0.5,
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spinbutton, 1, FALSE);
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g_signal_connect (adj, "value_changed",
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G_CALLBACK (gimp_int_adjustment_update),
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&config.ntries);
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gtk_widget_show (dlg);
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run = (gimp_dialog_run (GIMP_DIALOG (dlg)) == GTK_RESPONSE_OK);
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if (run)
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{
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config.width = gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (sizeentry),
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0);
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config.height = gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (sizeentry),
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1);
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}
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gtk_widget_destroy (dlg);
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return run;
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}
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