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gimp/plug-ins/common/border-average.c

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/* borderaverage 0.01 - image processing plug-in for 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <libgimp/gimp.h>
#include <libgimp/gimpui.h>
#include "libgimp/stdplugins-intl.h"
#define PLUG_IN_PROC "plug-in-borderaverage"
#define PLUG_IN_BINARY "border-average"
#define PLUG_IN_ROLE "gimp-border-average"
/* 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 (GeglBuffer *buffer,
gint32 drawable_id,
GimpRGB *result);
static gboolean borderaverage_dialog (gint32 image_ID,
gint32 drawable_id);
static void add_new_color (const guchar *buffer,
gint *cube,
gint bucket_expo);
static void thickness_callback (GtkWidget *widget,
gpointer data);
const 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 const GimpParamDef args[] =
{
{ GIMP_PDB_INT32, "run-mode", "The run mode { RUN-INTERACTIVE (0), RUN-NONINTERACTIVE (1) }" },
{ 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 const GimpParamDef return_vals[] =
{
{ GIMP_PDB_COLOR, "borderaverage", "The average color of the specified border." },
};
gimp_install_procedure (PLUG_IN_PROC,
N_("Set foreground to the average color of the image border"),
"",
"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_PROC, "<Image>/Colors/Info");
}
static void
run (const gchar *name,
gint nparams,
const GimpParam *param,
gint *nreturn_vals,
GimpParam **return_vals)
{
static GimpParam values[3];
gint32 image_ID;
GimpPDBStatusType status = GIMP_PDB_SUCCESS;
GimpRGB result_color;
GimpRunMode run_mode;
gint32 drawable_id;
GeglBuffer *buffer;
INIT_I18N ();
gegl_init (NULL, NULL);
run_mode = param[0].data.d_int32;
image_ID = param[1].data.d_int32;
drawable_id = param[2].data.d_drawable;
buffer = gimp_drawable_get_buffer (drawable_id);
switch (run_mode)
{
case GIMP_RUN_INTERACTIVE:
gimp_get_data (PLUG_IN_PROC, &borderaverage_data);
borderaverage_thickness = borderaverage_data.thickness;
borderaverage_bucket_exponent = borderaverage_data.bucket_exponent;
if (! borderaverage_dialog (image_ID, drawable_id))
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_PROC, &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_id))
{
gimp_progress_init ( _("Border Average"));
borderaverage (buffer, drawable_id, &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_PROC,
&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;
g_object_unref (buffer);
}
static void
borderaverage (GeglBuffer *buffer,
gint32 drawable_id,
GimpRGB *result)
{
gint x, y, width, height;
gint max;
guchar r, g, b;
gint bucket_num, bucket_expo, bucket_rexpo;
gint *cube;
gint i, j, k;
GeglRectangle border[4];
if (! gimp_drawable_mask_intersect (drawable_id, &x, &y, &width, &height))
{
gimp_rgba_set_uchar (result, 0, 0, 0, 255);
return;
}
/* allocate and clear the cube before */
bucket_expo = borderaverage_bucket_exponent;
bucket_rexpo = 8 - bucket_expo;
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;
}
}
}
/* Top */
border[0].x = x;
border[0].y = y;
border[0].width = width;
border[0].height = borderaverage_thickness;
/* Bottom */
border[1].x = x;
border[1].y = y + height - borderaverage_thickness;
border[1].width = width;
border[1].height = borderaverage_thickness;
/* Left */
border[2].x = x;
border[2].y = y + borderaverage_thickness;
border[2].width = borderaverage_thickness;
border[2].height = height - 2 * borderaverage_thickness;
/* Right */
border[3].x = x + width - borderaverage_thickness;
border[3].y = y + borderaverage_thickness;
border[3].width = borderaverage_thickness;
border[3].height = height - 2 * borderaverage_thickness;
/* Fill the cube */
for (i = 0; i < 4; i++)
{
if (border[i].width > 0 && border[i].height > 0)
{
GeglBufferIterator *gi;
gi = gegl_buffer_iterator_new (buffer, &border[i], 0, babl_format ("R'G'B' u8"),
GEGL_ACCESS_READWRITE, GEGL_ABYSS_NONE);
while (gegl_buffer_iterator_next (gi))
{
guint k;
guchar *data;
data = (guchar*) gi->data[0];
for (k = 0; k < gi->length; k++)
{
add_new_color (data + k * 3,
cube,
bucket_expo);
}
}
}
}
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_rgba_set_uchar (result, r, g, b, 255);
g_free (cube);
}
static void
add_new_color (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 = buffer[1] >> bucket_expo;
b = buffer[2] >> bucket_expo;
cube[(r << (bucket_rexpo << 1)) + (g << bucket_rexpo) + b]++;
}
static gboolean
borderaverage_dialog (gint32 image_ID,
gint32 drawable_id)
{
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;
gint width, height;
const gchar *labels[] =
{ "1", "2", "4", "8", "16", "32", "64", "128", "256" };
gimp_ui_init (PLUG_IN_BINARY, FALSE);
dialog = gimp_dialog_new (_("Borderaverage"), PLUG_IN_ROLE,
NULL, 0,
gimp_standard_help_func, PLUG_IN_PROC,
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);
gimp_window_set_transient (GTK_WINDOW (dialog));
main_vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12);
gtk_container_set_border_width (GTK_CONTAINER (main_vbox), 12);
gtk_box_pack_start (GTK_BOX (gtk_dialog_get_content_area (GTK_DIALOG (dialog))),
main_vbox, TRUE, TRUE, 0);
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_box_new (GTK_ORIENTATION_HORIZONTAL, 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,
MIN (width, height));
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_box_new (GTK_ORIENTATION_HORIZONTAL, 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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