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

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/* borderaverage 0.01 - image processing plug-in for PIKA.
*
* 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 <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <libpika/pika.h>
#include <libpika/pikaui.h>
#include "libpika/stdplugins-intl.h"
#define PLUG_IN_PROC "plug-in-borderaverage"
#define PLUG_IN_BINARY "border-average"
#define PLUG_IN_ROLE "pika-border-average"
typedef struct _BorderAverage BorderAverage;
typedef struct _BorderAverageClass BorderAverageClass;
struct _BorderAverage
{
PikaPlugIn parent_instance;
};
struct _BorderAverageClass
{
PikaPlugInClass parent_class;
};
#define BORDER_AVERAGE_TYPE (border_average_get_type ())
#define BORDER_AVERAGE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), BORDER_AVERAGE_TYPE, BorderAverage))
GType border_average_get_type (void) G_GNUC_CONST;
static GList * border_average_query_procedures (PikaPlugIn *plug_in);
static PikaProcedure * border_average_create_procedure (PikaPlugIn *plug_in,
const gchar *name);
static PikaValueArray * border_average_run (PikaProcedure *procedure,
PikaRunMode run_mode,
PikaImage *image,
gint n_drawables,
PikaDrawable **drawables,
PikaProcedureConfig *config,
gpointer run_data);
static void borderaverage (GObject *config,
GeglBuffer *buffer,
PikaDrawable *drawable,
PikaRGB *result);
static gboolean borderaverage_dialog (PikaProcedure *procedure,
GObject *config,
PikaImage *image,
PikaDrawable *drawable);
static void add_new_color (const guchar *buffer,
gint *cube,
gint bucket_expo);
G_DEFINE_TYPE (BorderAverage, border_average, PIKA_TYPE_PLUG_IN)
PIKA_MAIN (BORDER_AVERAGE_TYPE)
DEFINE_STD_SET_I18N
static void
border_average_class_init (BorderAverageClass *klass)
{
PikaPlugInClass *plug_in_class = PIKA_PLUG_IN_CLASS (klass);
plug_in_class->query_procedures = border_average_query_procedures;
plug_in_class->create_procedure = border_average_create_procedure;
plug_in_class->set_i18n = STD_SET_I18N;
}
static void
border_average_init (BorderAverage *film)
{
}
static GList *
border_average_query_procedures (PikaPlugIn *plug_in)
{
return g_list_append (NULL, g_strdup (PLUG_IN_PROC));
}
static PikaProcedure *
border_average_create_procedure (PikaPlugIn *plug_in,
const gchar *name)
{
PikaProcedure *procedure = NULL;
if (! strcmp (name, PLUG_IN_PROC))
{
procedure = pika_image_procedure_new (plug_in, name,
PIKA_PDB_PROC_TYPE_PLUGIN,
border_average_run, NULL, NULL);
pika_procedure_set_image_types (procedure, "RGB*");
pika_procedure_set_sensitivity_mask (procedure,
PIKA_PROCEDURE_SENSITIVE_DRAWABLE);
pika_procedure_set_menu_label (procedure, _("_Border Average..."));
pika_procedure_add_menu_path (procedure, "<Image>/Colors/Info");
pika_procedure_set_documentation (procedure,
_("Set foreground to the average color of the image border"),
"",
name);
pika_procedure_set_attribution (procedure,
"Philipp Klaus",
"Internet Access AG",
"1998");
PIKA_PROC_ARG_INT (procedure, "thickness",
_("_Thickness"),
_("Border size to take in count"),
0, G_MAXINT, 3,
G_PARAM_READWRITE);
PIKA_PROC_AUX_ARG_UNIT (procedure, "thickness-unit",
_("Thickness unit of measure"),
_("Border size unit of measure"),
TRUE, TRUE, PIKA_UNIT_PIXEL,
PIKA_PARAM_READWRITE);
PIKA_PROC_ARG_INT (procedure, "bucket-exponent",
_("Bucket Si_ze"),
_("Bits for bucket size (default=4: 16 Levels)"),
0, G_MAXINT, 4,
G_PARAM_READWRITE);
PIKA_PROC_VAL_RGB (procedure, "borderaverage",
_("The average color of the specified border."),
_("The average color of the specified border."),
TRUE, NULL,
G_PARAM_READWRITE);
}
return procedure;
}
static PikaValueArray *
border_average_run (PikaProcedure *procedure,
PikaRunMode run_mode,
PikaImage *image,
gint n_drawables,
PikaDrawable **drawables,
PikaProcedureConfig *config,
gpointer run_data)
{
PikaDrawable *drawable;
PikaValueArray *return_vals = NULL;
PikaPDBStatusType status = PIKA_PDB_SUCCESS;
PikaRGB result_color = { 0.0, };
GeglBuffer *buffer;
gegl_init (NULL, NULL);
if (n_drawables != 1)
{
GError *error = NULL;
g_set_error (&error, PIKA_PLUG_IN_ERROR, 0,
_("Procedure '%s' only works with one drawable."),
PLUG_IN_PROC);
return pika_procedure_new_return_values (procedure,
PIKA_PDB_CALLING_ERROR,
error);
}
else
{
drawable = drawables[0];
}
buffer = pika_drawable_get_buffer (drawable);
if (run_mode == PIKA_RUN_INTERACTIVE &&
! borderaverage_dialog (procedure, G_OBJECT (config), image, drawable))
return pika_procedure_new_return_values (procedure, PIKA_PDB_CANCEL, NULL);
if (status == PIKA_PDB_SUCCESS)
{
/* Make sure that the drawable is RGB color */
if (pika_drawable_is_rgb (drawable))
{
pika_progress_init ( _("Border Average"));
borderaverage (G_OBJECT (config), buffer, drawable, &result_color);
if (run_mode != PIKA_RUN_NONINTERACTIVE)
pika_context_set_foreground (&result_color);
}
else
{
status = PIKA_PDB_EXECUTION_ERROR;
}
}
g_object_unref (buffer);
return_vals = pika_procedure_new_return_values (procedure, status, NULL);
if (status == PIKA_PDB_SUCCESS)
PIKA_VALUES_SET_RGB (return_vals, 1, &result_color);
return return_vals;
}
static void
borderaverage (GObject *config,
GeglBuffer *buffer,
PikaDrawable *drawable,
PikaRGB *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];
gint borderaverage_thickness;
gint borderaverage_bucket_exponent;
g_object_get (config,
"thickness", &borderaverage_thickness,
"bucket-exponent", &borderaverage_bucket_exponent,
NULL);
if (! pika_drawable_mask_intersect (drawable, &x, &y, &width, &height))
{
pika_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, 1);
while (gegl_buffer_iterator_next (gi))
{
guint k;
guchar *data;
data = (guchar*) gi->items[0].data;
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 */
pika_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 (PikaProcedure *procedure,
GObject *config,
PikaImage *image,
PikaDrawable *drawable)
{
GtkWidget *dialog;
GtkListStore *store;
GtkWidget *size_entry;
gboolean run;
gdouble xres, yres;
GeglBuffer *buffer = NULL;
pika_ui_init (PLUG_IN_BINARY);
dialog = pika_procedure_dialog_new (procedure,
PIKA_PROCEDURE_CONFIG (config),
_("Border Average"));
pika_dialog_set_alternative_button_order (GTK_DIALOG (dialog),
GTK_RESPONSE_OK,
GTK_RESPONSE_CANCEL,
-1);
pika_window_set_transient (GTK_WINDOW (dialog));
pika_procedure_dialog_get_label (PIKA_PROCEDURE_DIALOG (dialog),
"border-size-label",
_("Border Size"),
FALSE, FALSE);
/* Get the image resolution */
pika_image_get_resolution (image, &xres, &yres);
size_entry = pika_procedure_dialog_get_size_entry (PIKA_PROCEDURE_DIALOG (dialog),
"thickness", TRUE,
"thickness-unit", "%a",
PIKA_SIZE_ENTRY_UPDATE_SIZE,
xres);
/* set the size (in pixels) that will be treated as 0% and 100% */
buffer = pika_drawable_get_buffer (drawable);
if (buffer)
pika_size_entry_set_size (PIKA_SIZE_ENTRY (size_entry), 0, 0.0,
MIN (gegl_buffer_get_width (buffer),
gegl_buffer_get_height (buffer)));
pika_size_entry_set_refval_boundaries (PIKA_SIZE_ENTRY (size_entry), 0, 1.0,
MIN (gegl_buffer_get_width (buffer),
gegl_buffer_get_height (buffer)) / 2);
pika_procedure_dialog_fill_frame (PIKA_PROCEDURE_DIALOG (dialog),
"border-size-frame", "border-size-label",
FALSE, "thickness");
pika_procedure_dialog_get_label (PIKA_PROCEDURE_DIALOG (dialog),
"bucket-size-label",
_("Number of Colors"),
FALSE, FALSE);
store = pika_int_store_new ("1", 0, "2", 1, "4", 2, "8", 3,
"16", 4, "32", 5, "64", 6, "128", 7,
"256", 8, NULL);
pika_procedure_dialog_get_int_combo (PIKA_PROCEDURE_DIALOG (dialog),
"bucket-exponent",
PIKA_INT_STORE (store));
pika_procedure_dialog_fill_frame (PIKA_PROCEDURE_DIALOG (dialog),
"bucket-size-frame", "bucket-size-label",
FALSE, "bucket-exponent");
pika_procedure_dialog_fill (PIKA_PROCEDURE_DIALOG (dialog),
"border-size-frame",
"bucket-size-frame",
NULL);
gtk_widget_show (dialog);
run = pika_procedure_dialog_run (PIKA_PROCEDURE_DIALOG (dialog));
gtk_widget_destroy (dialog);
return run;
}
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