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gimp/plug-ins/common/borderaverage.c

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/* borderaverage 0.01 - image processing plug-in for the Gimp.
*
* Copyright (C) 1998 Philipp Klaus (webmaster@access.ch)
*
*
* 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 <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include "libgimp/stdplugins-intl.h"
/* Declare local functions.
*/
static void query (void);
static void run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals);
static void borderaverage (GimpDrawable *drawable,
GimpRGB *result);
static gboolean borderaverage_dialog (gint32 image_ID,
GimpDrawable *drawable);
static void add_new_color (gint bytes,
const guchar *buffer,
gint *cube,
gint bucket_expo);
static void thickness_callback (GtkWidget *widget,
gpointer data);
GimpPlugInInfo PLUG_IN_INFO =
{
NULL, /* init */
NULL, /* quit */
query, /* query */
run, /* run */
};
static gint borderaverage_thickness = 3;
static gint borderaverage_bucket_exponent = 4;
struct borderaverage_data
{
gint thickness;
gint bucket_exponent;
}
static borderaverage_data =
{
3,
4
};
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, "thickness", "Border size to take in count" },
{ GIMP_PDB_INT32, "bucket_exponent", "Bits for bucket size (default=4: 16 Levels)" },
};
static GimpParamDef return_vals[] =
{
{ GIMP_PDB_COLOR, "borderaverage", "The average color of the specified border" },
};
gimp_install_procedure ("plug_in_borderaverage",
"Borderaverage",
"",
"Philipp Klaus",
"Internet Access AG",
"1998",
N_("_Border Average..."),
"RGB*",
GIMP_PLUGIN,
G_N_ELEMENTS (args),
G_N_ELEMENTS (return_vals),
args, return_vals);
gimp_plugin_menu_register ("plug_in_borderaverage", "<Image>/Filters/Colors");
}
static void
run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals)
{
static GimpParam values[3];
GimpDrawable *drawable;
gint32 image_ID;
GimpPDBStatusType status = GIMP_PDB_SUCCESS;
GimpRGB result_color;
GimpRunMode run_mode;
INIT_I18N ();
run_mode = param[0].data.d_int32;
image_ID = param[1].data.d_int32;
/* Get the specified drawable */
drawable = gimp_drawable_get (param[2].data.d_drawable);
switch (run_mode)
{
case GIMP_RUN_INTERACTIVE:
gimp_get_data ("plug_in_borderaverage", &borderaverage_data);
borderaverage_thickness = borderaverage_data.thickness;
borderaverage_bucket_exponent = borderaverage_data.bucket_exponent;
if (! borderaverage_dialog (image_ID, drawable))
status = GIMP_PDB_EXECUTION_ERROR;
break;
case GIMP_RUN_NONINTERACTIVE:
if (nparams != 5)
status = GIMP_PDB_CALLING_ERROR;
if (status == GIMP_PDB_SUCCESS)
{
borderaverage_thickness = param[3].data.d_int32;
borderaverage_bucket_exponent = param[4].data.d_int32;
}
break;
case GIMP_RUN_WITH_LAST_VALS:
gimp_get_data ("plug_in_borderaverage", &borderaverage_data);
borderaverage_thickness = borderaverage_data.thickness;
borderaverage_bucket_exponent = borderaverage_data.bucket_exponent;
break;
default:
break;
}
if (status == GIMP_PDB_SUCCESS)
{
/* Make sure that the drawable is RGB color */
if (gimp_drawable_is_rgb (drawable->drawable_id))
{
gimp_progress_init ( _("Border Average..."));
borderaverage (drawable, &result_color);
if (run_mode != GIMP_RUN_NONINTERACTIVE)
{
gimp_context_set_foreground (&result_color);
}
if (run_mode == GIMP_RUN_INTERACTIVE)
{
borderaverage_data.thickness = borderaverage_thickness;
borderaverage_data.bucket_exponent = borderaverage_bucket_exponent;
gimp_set_data ("plug_in_borderaverage",
&borderaverage_data, sizeof (borderaverage_data));
}
}
else
{
status = GIMP_PDB_EXECUTION_ERROR;
}
}
*nreturn_vals = 3;
*return_vals = values;
values[0].type = GIMP_PDB_STATUS;
values[0].data.d_status = status;
values[1].type = GIMP_PDB_COLOR;
values[1].data.d_color = result_color;
gimp_drawable_detach (drawable);
}
typedef struct {
gint x1, x2, y1, y2;
gint bucket_expo;
gint *cube;
} BorderAverageParam_t;
static void
borderaverage_func (gint x,
gint y,
const guchar *src,
gint bpp,
gpointer data)
{
BorderAverageParam_t *param = (BorderAverageParam_t*) data;
if (x < param->x1 + borderaverage_thickness ||
x >= param->x2 - borderaverage_thickness ||
y < param->y1 + borderaverage_thickness ||
y >= param->y2 - borderaverage_thickness)
{
add_new_color (bpp, src, param->cube, param->bucket_expo);
}
}
static void
borderaverage (GimpDrawable *drawable,
GimpRGB *result)
{
gint width;
gint height;
gint x1, x2, y1, y2;
gint bytes;
gint max;
guchar r, g, b;
guchar *buffer;
gint bucket_num, bucket_expo, bucket_rexpo;
gint *cube;
gint i, j, k; /* index variables */
GimpRgnIterator *iter;
BorderAverageParam_t param;
/* allocate and clear the cube before */
bucket_expo = borderaverage_bucket_exponent;
bucket_rexpo = 8 - bucket_expo;
param.cube = cube = g_new (gint, 1 << (bucket_rexpo * 3));
bucket_num = 1 << bucket_rexpo;
for (i = 0; i < bucket_num; i++)
{
for (j = 0; j < bucket_num; j++)
{
for (k = 0; k < bucket_num; k++)
{
cube[(i << (bucket_rexpo << 1)) + (j << bucket_rexpo) + k] = 0;
}
}
}
gimp_drawable_mask_bounds (drawable->drawable_id, &x1, &y1, &x2, &y2);
param.x1 = x1;
param.y1 = y1;
param.x2 = x2;
param.y2 = y2;
param.bucket_expo = bucket_expo;
/* Get the size of the input image. (This will/must be the same
* as the size of the output image.
*/
width = drawable->width;
height = drawable->height;
bytes = drawable->bpp;
gimp_tile_cache_ntiles (2 * ((x2 - x1) / gimp_tile_width () + 1));
/* allocate row buffer */
buffer = g_new (guchar, (x2 - x1) * bytes);
iter = gimp_rgn_iterator_new (drawable, 0);
gimp_rgn_iterator_src (iter, borderaverage_func, &param);
gimp_rgn_iterator_free (iter);
max = 0; r = 0; g = 0; b = 0;
/* get max of cube */
for (i = 0; i < bucket_num; i++)
{
for (j = 0; j < bucket_num; j++)
{
for (k = 0; k < bucket_num; k++)
{
if (cube[(i << (bucket_rexpo << 1)) +
(j << bucket_rexpo) + k] > max)
{
max = cube[(i << (bucket_rexpo << 1)) +
(j << bucket_rexpo) + k];
r = (i<<bucket_expo) + (1<<(bucket_expo - 1));
g = (j<<bucket_expo) + (1<<(bucket_expo - 1));
b = (k<<bucket_expo) + (1<<(bucket_expo - 1));
}
}
}
}
/* return the color */
gimp_rgb_set_uchar (result, r, g, b);
g_free (buffer);
g_free (cube);
}
static void
add_new_color (gint bytes,
const guchar *buffer,
gint *cube,
gint bucket_expo)
{
guchar r, g, b;
gint bucket_rexpo;
bucket_rexpo = 8 - bucket_expo;
r = buffer[0] >> bucket_expo;
g = (bytes > 1) ? buffer[1] >> bucket_expo : 0;
b = (bytes > 2) ? buffer[2] >> bucket_expo : 0;
cube[(r << (bucket_rexpo << 1)) + (g << bucket_rexpo) + b]++;
}
static gboolean
borderaverage_dialog (gint32 image_ID,
GimpDrawable *drawable)
{
GtkWidget *dialog;
GtkWidget *frame;
GtkWidget *main_vbox;
GtkWidget *hbox;
GtkWidget *label;
GtkWidget *size_entry;
GimpUnit unit;
GtkWidget *combo;
GtkSizeGroup *group;
gboolean run;
gdouble xres, yres;
const gchar *labels[] =
{ "1", "2", "4", "8", "16", "32", "64", "128", "256" };
gimp_ui_init ("borderaverage", FALSE);
dialog = gimp_dialog_new (_("Borderaverage"), "borderaverage",
NULL, 0,
gimp_standard_help_func, "plug-in-borderaverage",
GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
GTK_STOCK_OK, GTK_RESPONSE_OK,
NULL);
gtk_dialog_set_alternative_button_order (GTK_DIALOG (dialog),
GTK_RESPONSE_OK,
GTK_RESPONSE_CANCEL,
-1);
main_vbox = gtk_vbox_new (FALSE, 12);
gtk_container_set_border_width (GTK_CONTAINER (main_vbox), 12);
gtk_container_add (GTK_CONTAINER (GTK_DIALOG (dialog)->vbox), main_vbox);
gtk_widget_show (main_vbox);
frame = gimp_frame_new (_("Border Size"));
gtk_box_pack_start (GTK_BOX (main_vbox), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
hbox = gtk_hbox_new (FALSE, 6);
gtk_container_add (GTK_CONTAINER (frame), hbox);
gtk_widget_show (hbox);
label = gtk_label_new_with_mnemonic (_("_Thickness:"));
gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.5);
gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
group = gtk_size_group_new (GTK_SIZE_GROUP_HORIZONTAL);
gtk_size_group_add_widget (group, label);
g_object_unref (group);
/* Get the image resolution and unit */
gimp_image_get_resolution (image_ID, &xres, &yres);
unit = gimp_image_get_unit (image_ID);
size_entry = gimp_size_entry_new (1, unit, "%a", TRUE, TRUE, FALSE, 4,
GIMP_SIZE_ENTRY_UPDATE_SIZE);
gtk_box_pack_start (GTK_BOX (hbox), size_entry, FALSE, FALSE, 0);
gimp_size_entry_set_unit (GIMP_SIZE_ENTRY (size_entry), GIMP_UNIT_PIXEL);
gimp_size_entry_set_resolution (GIMP_SIZE_ENTRY (size_entry), 0, xres, TRUE);
/* set the size (in pixels) that will be treated as 0% and 100% */
gimp_size_entry_set_size (GIMP_SIZE_ENTRY (size_entry), 0, 0.0,
drawable->width);
gimp_size_entry_set_refval_boundaries (GIMP_SIZE_ENTRY (size_entry), 0,
1.0, 256.0);
gtk_table_set_col_spacing (GTK_TABLE (size_entry), 0, 4);
gtk_table_set_col_spacing (GTK_TABLE (size_entry), 2, 12);
gimp_size_entry_set_refval (GIMP_SIZE_ENTRY (size_entry), 0,
(gdouble) borderaverage_thickness);
g_signal_connect (size_entry, "value_changed",
G_CALLBACK (thickness_callback),
NULL);
gtk_widget_show (size_entry);
frame = gimp_frame_new (_("Number of Colors"));
gtk_box_pack_start (GTK_BOX (main_vbox), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
hbox = gtk_hbox_new (FALSE, 6);
gtk_container_add (GTK_CONTAINER (frame), hbox);
gtk_widget_show (hbox);
label = gtk_label_new_with_mnemonic (_("_Bucket size:"));
gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.5);
gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
gtk_size_group_add_widget (group, label);
combo = gimp_int_combo_box_new_array (G_N_ELEMENTS (labels), labels);
gimp_int_combo_box_set_active (GIMP_INT_COMBO_BOX (combo),
borderaverage_bucket_exponent);
g_signal_connect (combo, "changed",
G_CALLBACK (gimp_int_combo_box_get_active),
&borderaverage_bucket_exponent);
gtk_box_pack_start (GTK_BOX (hbox), combo, FALSE, FALSE, 0);
gtk_widget_show (combo);
gtk_label_set_mnemonic_widget (GTK_LABEL (label), combo);
gtk_widget_show (dialog);
run = (gimp_dialog_run (GIMP_DIALOG (dialog)) == GTK_RESPONSE_OK);
gtk_widget_destroy (dialog);
return run;
}
static void
thickness_callback (GtkWidget *widget,
gpointer data)
{
borderaverage_thickness =
gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (widget), 0);
}
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