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gimp/plug-ins/common/max_rgb.c

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/* max_rgb.c -- This is a plug-in for the GIMP (1.0's API)
* Author: Shuji Narazaki <narazaki@InetQ.or.jp>
* Time-stamp: <2000-02-08 16:26:24 yasuhiro>
* Version: 0.35
*
* Copyright (C) 1997 Shuji Narazaki <narazaki@InetQ.or.jp>
*
* May 2000 - tim copperfield [timecop@japan.co.jp]
*
* Added a preview mode. After adding preview mode realised just exactly
* how useless this plugin is :)
*
* 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.
*/
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <gtk/gtk.h>
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include "libgimp/stdplugins-intl.h"
/* Replace them with the right ones */
#define PLUG_IN_NAME "plug_in_max_rgb"
#define SHORT_NAME "max_rgb"
#define PROGRESS_UPDATE_NUM 100
#define PREVIEW_SIZE 128
static void query (void);
static void run (gchar *name,
gint nparams,
GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals);
static void fill_preview_with_thumb (GtkWidget *preview_widget,
gint32 drawable_id);
static GtkWidget *preview_widget (GimpDrawable *drawable);
static GimpPDBStatusType main_function (GimpDrawable *drawable,
gboolean preview_mode);
static gint dialog (GimpDrawable *drawable);
static void ok_callback (GtkWidget *widget,
gpointer data);
static void radio_callback (GtkWidget *widget,
gpointer data);
GimpPlugInInfo PLUG_IN_INFO =
{
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run, /* run_proc */
};
enum
{
MIN_CHANNELS = 0,
MAX_CHANNELS = 1
};
typedef struct
{
gint max_p; /* gint, gdouble, and so on */
} ValueType;
typedef struct
{
gint run;
} Interface;
static ValueType pvals =
{
MAX_CHANNELS
};
static Interface interface =
{
FALSE
};
static guchar *preview_bits;
static GtkWidget *preview;
MAIN ()
static void
query (void)
{
static GimpParamDef args [] =
{
{ GIMP_PDB_INT32, "run_mode", "Interactive, non-interactive"},
{ GIMP_PDB_IMAGE, "image", "Input image (not used)"},
{ GIMP_PDB_DRAWABLE, "drawable", "Input drawable"},
{ GIMP_PDB_INT32, "max_p", "1 for maximizing, 0 for minimizing"}
};
static gint nargs = sizeof (args) / sizeof (args[0]);
gimp_install_procedure (PLUG_IN_NAME,
"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",
"the help is not yet written for this plug-in since none is needed.",
"Shuji Narazaki (narazaki@InetQ.or.jp)",
"Shuji Narazaki",
"May 2000",
N_("<Image>/Filters/Colors/Max RGB..."),
"RGB*",
GIMP_PLUGIN,
nargs, 0,
args, NULL);
}
static void
run (gchar *name,
gint nparams,
GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals)
{
GimpDrawable *drawable;
static GimpParam values[1];
GimpPDBStatusType status = GIMP_PDB_EXECUTION_ERROR;
GimpRunModeType run_mode;
run_mode = param[0].data.d_int32;
drawable = gimp_drawable_get (param[2].data.d_drawable);
*nreturn_vals = 1;
*return_vals = values;
values[0].type = GIMP_PDB_STATUS;
values[0].data.d_status = status;
switch (run_mode)
{
case GIMP_RUN_INTERACTIVE:
INIT_I18N_UI();
gimp_get_data (PLUG_IN_NAME, &pvals);
/* Since a channel might be selected, we must check wheter RGB or not. */
if (!gimp_drawable_is_rgb (drawable->drawable_id))
{
g_message (_("Max RGB: Can only operate on RGB drawables."));
return;
}
if (! dialog (drawable))
return;
break;
case GIMP_RUN_NONINTERACTIVE:
INIT_I18N();
/* You must copy the values of parameters to pvals or dialog variables. */
break;
case GIMP_RUN_WITH_LAST_VALS:
INIT_I18N();
gimp_get_data (PLUG_IN_NAME, &pvals);
break;
}
status = main_function (drawable, FALSE);
if (run_mode != GIMP_RUN_NONINTERACTIVE)
gimp_displays_flush ();
if (run_mode == GIMP_RUN_INTERACTIVE && status == GIMP_PDB_SUCCESS)
gimp_set_data (PLUG_IN_NAME, &pvals, sizeof (ValueType));
g_free(preview_bits);
values[0].type = GIMP_PDB_STATUS;
values[0].data.d_status = status;
}
static GimpPDBStatusType
main_function (GimpDrawable *drawable,
gboolean preview_mode)
{
GimpPixelRgn src_rgn, dest_rgn;
guchar *src, *dest, *save_dest, *src_data, *dest_data;
gpointer pr = NULL;
gint x, y, x1, x2, y1, y2;
gint gap, total, processed = 0;
gint init_value, flag;
gint bpp = 3;
init_value = (pvals.max_p > 0) ? 0 : 255;
flag = (0 < pvals.max_p) ? 1 : -1;
if (preview_mode)
{
x1 = y1 = 0;
x2 = GTK_PREVIEW (preview)->buffer_width;
y2 = GTK_PREVIEW (preview)->buffer_height;
gap = 0; /* no alpha on preview */
bpp = GTK_PREVIEW (preview)->bpp;
}
else
{
gap = (gimp_drawable_has_alpha (drawable->drawable_id)) ? 1 : 0;
gimp_drawable_mask_bounds (drawable->drawable_id, &x1, &y1, &x2, &y2);
gimp_tile_cache_ntiles (2 * (drawable->width / gimp_tile_width () + 1));
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);
pr = gimp_pixel_rgns_register (2, &src_rgn, &dest_rgn);
gimp_progress_init ( _("Max RGB: Scanning..."));
}
total = (x2 - x1) * (y2 - y1);
if (total < 1)
return GIMP_PDB_EXECUTION_ERROR;
if (preview_mode)
{ /* preview mode. here we go again. see nova.c
I just don't want to write a prev_pixel_rgn_process
and then find out someone else coded a much cooler
preview widget / functions for GIMP */
src_data = g_malloc (GTK_PREVIEW (preview)->rowstride * y2);
memcpy (src_data, preview_bits, GTK_PREVIEW (preview)->rowstride * y2);
dest_data = g_malloc (GTK_PREVIEW (preview)->rowstride * y2);
save_dest = dest_data;
for (y = 0; y < y2; y++)
{
src = src_data + y * GTK_PREVIEW (preview)->rowstride;
dest = dest_data + y * GTK_PREVIEW (preview)->rowstride;
for (x = 0; x < x2; x++)
{
gint ch, max_ch = 0;
guchar max, tmp_value;
max = init_value;
for (ch = 0; ch < 3; ch++)
if (flag * max <= flag * (tmp_value = (*src++)))
{
if (max == tmp_value)
{
max_ch += 1 << ch;
}
else
{
max_ch = 1 << ch; /* clear memories of old channels */
max = tmp_value;
}
}
for ( ch = 0; ch < 3; ch++)
*dest++ = (guchar)(((max_ch & (1 << ch)) > 0) ? max : 0);
if (gap)
*dest++ = *src++;
}
}
memcpy (GTK_PREVIEW (preview)->buffer, save_dest, GTK_PREVIEW (preview)->rowstride * y2);
gtk_widget_queue_draw (preview);
}
else
{ /* normal mode */
for (; pr != NULL; pr = gimp_pixel_rgns_process (pr))
{
for (y = 0; y < src_rgn.h; y++)
{
src = src_rgn.data + y * src_rgn.rowstride;
dest = dest_rgn.data + y * dest_rgn.rowstride;
for (x = 0; x < src_rgn.w; x++)
{
gint ch, max_ch = 0;
guchar max, tmp_value;
max = init_value;
for (ch = 0; ch < 3; ch++)
if (flag * max <= flag * (tmp_value = (*src++)))
{
if (max == tmp_value)
{
max_ch += 1 << ch;
}
else
{
max_ch = 1 << ch; /* clear memories of old channels */
max = tmp_value;
}
}
for ( ch = 0; ch < 3; ch++)
*dest++ = (guchar)(((max_ch & (1 << ch)) > 0) ? max : 0);
if (gap)
*dest++=*src++;
if ((++processed % (total / PROGRESS_UPDATE_NUM + 1)) == 0)
gimp_progress_update ((gdouble) processed / (gdouble) total);
}
}
}
gimp_progress_update (1.0);
gimp_drawable_flush (drawable);
gimp_drawable_merge_shadow (drawable->drawable_id, TRUE);
gimp_drawable_update (drawable->drawable_id, x1, y1, (x2 - x1), (y2 - y1));
gimp_drawable_detach (drawable);
}
return GIMP_PDB_SUCCESS;
}
/* dialog stuff */
static gint
dialog (GimpDrawable *drawable)
{
GtkWidget *dlg;
GtkWidget *main_vbox;
GtkWidget *abox;
GtkWidget *frame;
GtkWidget *max;
GtkWidget *min;
gimp_ui_init ("max_rgb", TRUE);
dlg = gimp_dialog_new (_("Max RGB"), "max_rgb",
gimp_standard_help_func, "filters/max_rgb.html",
GTK_WIN_POS_MOUSE,
FALSE, TRUE, FALSE,
GTK_STOCK_OK, ok_callback,
NULL, NULL, NULL, TRUE, FALSE,
GTK_STOCK_CANCEL, gtk_widget_destroy,
NULL, 1, NULL, FALSE, TRUE,
NULL);
gtk_signal_connect (GTK_OBJECT (dlg), "destroy",
GTK_SIGNAL_FUNC (gtk_main_quit),
NULL);
main_vbox = gtk_vbox_new (FALSE, 2);
gtk_container_set_border_width (GTK_CONTAINER (main_vbox), 0);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dlg)->vbox), main_vbox, TRUE, TRUE, 0);
gtk_widget_show (main_vbox);
frame = gtk_frame_new (_("Preview"));
gtk_container_set_border_width (GTK_CONTAINER (frame), 6);
gtk_box_pack_start (GTK_BOX (main_vbox), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
abox = gtk_alignment_new (0.5, 0.5, 0.0, 0.0);
gtk_container_set_border_width (GTK_CONTAINER (abox), 4);
gtk_container_add (GTK_CONTAINER (frame), abox);
gtk_widget_show (abox);
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
gtk_container_add (GTK_CONTAINER (abox), frame);
gtk_widget_show (frame);
preview = preview_widget (drawable);
gtk_container_add (GTK_CONTAINER (frame), preview);
main_function (drawable, TRUE);
gtk_widget_show (preview);
frame = gimp_radio_group_new2 (TRUE, _("Parameter Settings"),
G_CALLBACK (radio_callback),
&pvals.max_p, (gpointer) pvals.max_p,
_("Hold the Maximal Channels"),
(gpointer) MAX_CHANNELS, &max,
_("Hold the Minimal Channels"),
(gpointer) MIN_CHANNELS, &min,
NULL);
gtk_object_set_data (GTK_OBJECT (max), "drawable", drawable);
gtk_object_set_data (GTK_OBJECT (min), "drawable", drawable);
gtk_container_set_border_width (GTK_CONTAINER (frame), 6);
gtk_container_add (GTK_CONTAINER (main_vbox), frame);
gtk_widget_show (frame);
gtk_widget_show (dlg);
gtk_main ();
gdk_flush ();
return interface.run;
}
static void
radio_callback (GtkWidget *widget,
gpointer data)
{
GimpDrawable *drawable;
gimp_radio_button_update (widget, data);
if (GTK_TOGGLE_BUTTON (widget)->active)
{
drawable = gtk_object_get_data (GTK_OBJECT (widget), "drawable");
main_function (drawable, TRUE);
}
}
static void
ok_callback (GtkWidget *widget,
gpointer data)
{
interface.run = TRUE;
gtk_widget_destroy (GTK_WIDGET (data));
}
static GtkWidget *
preview_widget (GimpDrawable *drawable)
{
gint size;
GtkWidget *preview;
preview = gtk_preview_new (GTK_PREVIEW_COLOR);
fill_preview_with_thumb (preview, drawable->drawable_id);
size = GTK_PREVIEW (preview)->rowstride * GTK_PREVIEW (preview)->buffer_height;
preview_bits = g_malloc (size);
memcpy (preview_bits, GTK_PREVIEW (preview)->buffer, size);
return preview;
}
static void
fill_preview_with_thumb (GtkWidget *widget,
gint32 drawable_ID)
{
guchar *drawable_data;
gint bpp;
gint x,y;
gint width = PREVIEW_SIZE;
gint height = PREVIEW_SIZE;
guchar *src;
gdouble r, g, b, a;
gdouble c0, c1;
guchar *p0, *p1;
guchar *even, *odd;
bpp = 0; /* Only returned */
drawable_data =
gimp_drawable_get_thumbnail_data (drawable_ID, &width, &height, &bpp);
if (width < 1 || height < 1)
return;
gtk_preview_size (GTK_PREVIEW (widget), width, height);
even = g_malloc (width * 3);
odd = g_malloc (width * 3);
src = drawable_data;
for (y = 0; y < height; y++)
{
p0 = even;
p1 = odd;
for (x = 0; x < width; x++)
{
if(bpp == 4)
{
r = ((gdouble)src[x*4+0])/255.0;
g = ((gdouble)src[x*4+1])/255.0;
b = ((gdouble)src[x*4+2])/255.0;
a = ((gdouble)src[x*4+3])/255.0;
}
else if(bpp == 3)
{
r = ((gdouble)src[x*3+0])/255.0;
g = ((gdouble)src[x*3+1])/255.0;
b = ((gdouble)src[x*3+2])/255.0;
a = 1.0;
}
else
{
r = ((gdouble)src[x*bpp+0])/255.0;
g = b = r;
if(bpp == 2)
a = ((gdouble)src[x*bpp+1])/255.0;
else
a = 1.0;
}
if ((x / GIMP_CHECK_SIZE_SM) & 1)
{
c0 = GIMP_CHECK_LIGHT;
c1 = GIMP_CHECK_DARK;
}
else
{
c0 = GIMP_CHECK_DARK;
c1 = GIMP_CHECK_LIGHT;
}
*p0++ = (c0 + (r - c0) * a) * 255.0;
*p0++ = (c0 + (g - c0) * a) * 255.0;
*p0++ = (c0 + (b - c0) * a) * 255.0;
*p1++ = (c1 + (r - c1) * a) * 255.0;
*p1++ = (c1 + (g - c1) * a) * 255.0;
*p1++ = (c1 + (b - c1) * a) * 255.0;
} /* for */
if ((y / GIMP_CHECK_SIZE_SM) & 1)
gtk_preview_draw_row (GTK_PREVIEW (widget), (guchar *)odd, 0, y, width);
else
gtk_preview_draw_row (GTK_PREVIEW (widget), (guchar *)even, 0, y, width);
src += width * bpp;
}
g_free (even);
g_free (odd);
g_free (drawable_data);
}
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