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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimpoperationscalarmultiply.c
* Copyright (C) 2014 Michael Natterer <mitch@gimp.org>
*
* 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 <gegl.h>
#include "operations-types.h"
#include "gimpoperationscalarmultiply.h"
enum
{
PROP_0,
PROP_N_COMPONENTS,
PROP_FACTOR
};
static void gimp_operation_scalar_multiply_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static void gimp_operation_scalar_multiply_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void gimp_operation_scalar_multiply_prepare (GeglOperation *operation);
static gboolean gimp_operation_scalar_multiply_process (GeglOperation *operation,
void *in_buf,
void *out_buf,
glong samples,
const GeglRectangle *roi,
gint level);
G_DEFINE_TYPE (GimpOperationScalarMultiply, gimp_operation_scalar_multiply,
GEGL_TYPE_OPERATION_POINT_FILTER)
#define parent_class gimp_operation_scalar_multiply_parent_class
static void
gimp_operation_scalar_multiply_class_init (GimpOperationScalarMultiplyClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GeglOperationClass *operation_class = GEGL_OPERATION_CLASS (klass);
GeglOperationPointFilterClass *point_class = GEGL_OPERATION_POINT_FILTER_CLASS (klass);
object_class->set_property = gimp_operation_scalar_multiply_set_property;
object_class->get_property = gimp_operation_scalar_multiply_get_property;
gegl_operation_class_set_keys (operation_class,
"name", "gimp:scalar-multiply",
"categories", "gimp",
"description", "Multiply all floats in a buffer by a factor",
NULL);
operation_class->prepare = gimp_operation_scalar_multiply_prepare;
point_class->process = gimp_operation_scalar_multiply_process;
g_object_class_install_property (object_class, PROP_N_COMPONENTS,
g_param_spec_int ("n-components",
"N Components",
"Number of components in the input/output vectors",
1, 16, 2,
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT));
g_object_class_install_property (object_class, PROP_FACTOR,
g_param_spec_double ("factor",
"Factor",
"The scalar factor",
G_MINFLOAT, G_MAXFLOAT,
1.0,
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT));
}
static void
gimp_operation_scalar_multiply_init (GimpOperationScalarMultiply *self)
{
}
static void
gimp_operation_scalar_multiply_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GimpOperationScalarMultiply *self = GIMP_OPERATION_SCALAR_MULTIPLY (object);
switch (property_id)
{
case PROP_N_COMPONENTS:
g_value_set_int (value, self->n_components);
break;
case PROP_FACTOR:
g_value_set_double (value, self->factor);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_operation_scalar_multiply_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GimpOperationScalarMultiply *self = GIMP_OPERATION_SCALAR_MULTIPLY (object);
switch (property_id)
{
case PROP_N_COMPONENTS:
self->n_components = g_value_get_int (value);
break;
case PROP_FACTOR:
self->factor = g_value_get_double (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_operation_scalar_multiply_prepare (GeglOperation *operation)
{
GimpOperationScalarMultiply *self = GIMP_OPERATION_SCALAR_MULTIPLY (operation);
const Babl *format;
format = babl_format_n (babl_type ("float"), self->n_components);
gegl_operation_set_format (operation, "input", format);
gegl_operation_set_format (operation, "output", format);
}
static gboolean
gimp_operation_scalar_multiply_process (GeglOperation *operation,
void *in_buf,
void *out_buf,
glong samples,
const GeglRectangle *roi,
gint level)
{
GimpOperationScalarMultiply *self = GIMP_OPERATION_SCALAR_MULTIPLY (operation);
gfloat *src = in_buf;
gfloat *dest = out_buf;
glong n_samples;
n_samples = samples * self->n_components;
while (n_samples--)
{
*dest = *src * self->factor;
src++;
dest++;
}
return TRUE;
}
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