mirror of https://github.com/GNOME/gimp.git
305 lines
7.5 KiB
C
305 lines
7.5 KiB
C
/* max_rgb.c -- This is a plug-in for the GIMP (1.0's API)
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* Author: Shuji Narazaki <narazaki@InetQ.or.jp>
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* Time-stamp: <2000-01-01 00:24:57 yasuhiro>
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* Version: 0.35
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*
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* Copyright (C) 1997 Shuji Narazaki <narazaki@InetQ.or.jp>
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*
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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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*
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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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*
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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 <math.h>
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#include <stdio.h>
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#include <stdlib.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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/* Replace them with the right ones */
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#define PLUG_IN_NAME "plug_in_max_rgb"
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#define SHORT_NAME "max_rgb"
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#define PROGRESS_UPDATE_NUM 100
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static void query (void);
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static void run (gchar *name,
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gint nparams,
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GParam *param,
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gint *nreturn_vals,
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GParam **return_vals);
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static GStatusType main_function (gint32 drawable_id);
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static gint dialog (void);
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static void ok_callback (GtkWidget *widget,
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gpointer data);
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GPlugInInfo 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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enum
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{
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MIN_CHANNELS = 0,
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MAX_CHANNELS = 1
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};
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typedef struct
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{
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gint max_p; /* gint, gdouble, and so on */
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} ValueType;
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typedef struct
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{
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gint run;
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} Interface;
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static ValueType pvals =
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{
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MAX_CHANNELS
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};
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static Interface interface =
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{
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FALSE
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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 GParamDef args [] =
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{
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{ PARAM_INT32, "run_mode", "Interactive, non-interactive"},
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{ PARAM_IMAGE, "image", "Input image (not used)"},
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{ PARAM_DRAWABLE, "drawable", "Input drawable"},
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{ PARAM_INT32, "max_p", "1 for maximizing, 0 for minimizing"}
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};
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static GParamDef *return_vals = NULL;
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static int nargs = sizeof (args) / sizeof (args[0]);
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static int nreturn_vals = 0;
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INIT_I18N();
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gimp_install_procedure (PLUG_IN_NAME,
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_("Return an image in which each pixel holds only the channel that has the maximum value in three (red, green, blue) channels, and other channels are zero-cleared"),
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"the help is not yet written for this plug-in",
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"Shuji Narazaki (narazaki@InetQ.or.jp)",
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"Shuji Narazaki",
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"1997",
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N_("<Image>/Filters/Colors/Max RGB..."),
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"RGB*",
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PROC_PLUG_IN,
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nargs, nreturn_vals,
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args, return_vals);
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}
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static void
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run (char *name,
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int nparams,
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GParam *param,
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int *nreturn_vals,
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GParam **return_vals)
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{
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static GParam values[1];
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GStatusType status = STATUS_EXECUTION_ERROR;
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GRunModeType run_mode;
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gint drawable_id;
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run_mode = param[0].data.d_int32;
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drawable_id = param[2].data.d_int32;
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*nreturn_vals = 1;
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*return_vals = values;
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values[0].type = PARAM_STATUS;
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values[0].data.d_status = status;
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switch (run_mode)
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{
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case RUN_INTERACTIVE:
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INIT_I18N_UI();
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gimp_get_data (PLUG_IN_NAME, &pvals);
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/* Since a channel might be selected, we must check wheter RGB or not. */
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if (!gimp_drawable_is_rgb(drawable_id))
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{
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gimp_message (_("RGB drawable is not selected."));
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return;
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}
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if (! dialog ())
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return;
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break;
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case RUN_NONINTERACTIVE:
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INIT_I18N();
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/* You must copy the values of parameters to pvals or dialog variables. */
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break;
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case RUN_WITH_LAST_VALS:
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INIT_I18N();
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gimp_get_data (PLUG_IN_NAME, &pvals);
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break;
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}
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status = main_function (drawable_id);
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if (run_mode != RUN_NONINTERACTIVE)
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gimp_displays_flush();
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if (run_mode == RUN_INTERACTIVE && status == STATUS_SUCCESS )
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gimp_set_data (PLUG_IN_NAME, &pvals, sizeof (ValueType));
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values[0].type = PARAM_STATUS;
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values[0].data.d_status = status;
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}
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static GStatusType
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main_function (gint32 drawable_id)
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{
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GDrawable *drawable;
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GPixelRgn src_rgn, dest_rgn;
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guchar *src, *dest;
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gpointer pr;
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gint x, y, x1, x2, y1, y2;
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gint gap, total, processed = 0;
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gint init_value, flag;
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init_value = (pvals.max_p > 0) ? 0 : 255;
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flag = (0 < pvals.max_p) ? 1 : -1;
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drawable = gimp_drawable_get (drawable_id);
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gap = (gimp_drawable_has_alpha (drawable_id)) ? 1 : 0;
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gimp_drawable_mask_bounds (drawable_id, &x1, &y1, &x2, &y2);
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total = (x2 - x1) * (y2 - y1);
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gimp_tile_cache_ntiles (2 * (drawable->width / gimp_tile_width () + 1));
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gimp_pixel_rgn_init (&src_rgn, drawable, x1, y1, (x2 - x1), (y2 - y1), FALSE, FALSE);
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gimp_pixel_rgn_init (&dest_rgn, drawable, x1, y1, (x2 - x1), (y2 - y1), TRUE, TRUE);
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pr = gimp_pixel_rgns_register (2, &src_rgn, &dest_rgn);
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gimp_progress_init ( _("max_rgb: scanning..."));
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for (; pr != NULL; pr = gimp_pixel_rgns_process (pr))
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{
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for (y = 0; y < src_rgn.h; y++)
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{
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src = src_rgn.data + y * src_rgn.rowstride;
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dest = dest_rgn.data + y * dest_rgn.rowstride;
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for (x = 0; x < src_rgn.w; x++)
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{
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gint ch, max_ch = 0;
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guchar max, tmp_value;
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max = init_value;
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for (ch = 0; ch < 3; ch++)
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if (flag * max <= flag * (tmp_value = (*src++)))
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{
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if (max == tmp_value)
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max_ch += 1 << ch;
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else
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{
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max_ch = 1 << ch; /* clear memories of old channels */
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max = tmp_value;
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}
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}
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for ( ch = 0; ch < 3; ch++)
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*dest++ = (guchar)(((max_ch & (1 << ch)) > 0) ? max : 0);
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if (gap) *dest++=*src++;
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if ((++processed % (total / PROGRESS_UPDATE_NUM)) == 0)
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gimp_progress_update ((double)processed /(double) total);
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}
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}
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}
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gimp_progress_update (1.0);
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gimp_drawable_flush (drawable);
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gimp_drawable_merge_shadow (drawable->id, TRUE);
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gimp_drawable_update (drawable->id, x1, y1, (x2 - x1), (y2 - y1));
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gimp_drawable_detach (drawable);
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return STATUS_SUCCESS;
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}
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/* dialog stuff */
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static gint
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dialog (void)
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{
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GtkWidget *dlg;
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GtkWidget *frame;
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gchar **argv;
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gint argc;
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argc = 1;
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argv = g_new (gchar *, 1);
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argv[0] = g_strdup (PLUG_IN_NAME);
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gtk_init (&argc, &argv);
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gtk_rc_parse (gimp_gtkrc ());
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dlg = gimp_dialog_new (_("Max RGB"), "max_rgb",
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gimp_plugin_help_func, "filters/max_rgb.html",
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GTK_WIN_POS_MOUSE,
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FALSE, TRUE, FALSE,
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_("OK"), ok_callback,
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NULL, NULL, NULL, TRUE, FALSE,
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_("Cancel"), gtk_widget_destroy,
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NULL, 1, NULL, FALSE, TRUE,
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NULL);
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gtk_signal_connect (GTK_OBJECT (dlg), "destroy",
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GTK_SIGNAL_FUNC (gtk_main_quit),
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NULL);
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frame = gimp_radio_group_new2 (TRUE, _("Parameter Settings"),
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gimp_radio_button_update,
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&pvals.max_p, (gpointer) pvals.max_p,
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_("Hold the Maximal Channels"),
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(gpointer) MAX_CHANNELS, NULL,
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_("Hold the Minimal Channels"),
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(gpointer) MIN_CHANNELS, NULL,
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NULL);
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gtk_container_set_border_width (GTK_CONTAINER (frame), 6);
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gtk_container_add (GTK_CONTAINER (GTK_DIALOG (dlg)->vbox), frame);
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gtk_widget_show (frame);
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gtk_widget_show (dlg);
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gtk_main ();
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gdk_flush ();
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return interface.run;
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}
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static void
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ok_callback (GtkWidget *widget,
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gpointer data)
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{
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interface.run = TRUE;
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gtk_widget_destroy (GTK_WIDGET (data));
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}
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