PIKApp/app/operations/pikaoperationcurves.c

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2023-09-26 00:35:21 +02:00
/* PIKA - Photo and Image Kooker Application
* a rebranding of The GNU Image Manipulation Program (created with heckimp)
* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
*
* Original copyright, applying to most contents (license remains unchanged):
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* pikaoperationcurves.c
* Copyright (C) 2007 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 <cairo.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <gegl.h>
#include "libpikamath/pikamath.h"
#include "operations-types.h"
#include "core/pikacurve.h"
#include "core/pikacurve-map.h"
#include "pikacurvesconfig.h"
#include "pikaoperationcurves.h"
#include "pika-intl.h"
static gboolean pika_operation_curves_process (GeglOperation *operation,
void *in_buf,
void *out_buf,
glong samples,
const GeglRectangle *roi,
gint level);
G_DEFINE_TYPE (PikaOperationCurves, pika_operation_curves,
PIKA_TYPE_OPERATION_POINT_FILTER)
#define parent_class pika_operation_curves_parent_class
static void
pika_operation_curves_class_init (PikaOperationCurvesClass *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 = pika_operation_point_filter_set_property;
object_class->get_property = pika_operation_point_filter_get_property;
gegl_operation_class_set_keys (operation_class,
"name", "pika:curves",
"categories", "color",
"description", _("Adjust color curves"),
NULL);
point_class->process = pika_operation_curves_process;
g_object_class_install_property (object_class,
PIKA_OPERATION_POINT_FILTER_PROP_TRC,
g_param_spec_enum ("trc",
"Linear/Percptual",
"What TRC to operate on",
PIKA_TYPE_TRC_TYPE,
PIKA_TRC_NON_LINEAR,
G_PARAM_READWRITE));
g_object_class_install_property (object_class,
PIKA_OPERATION_POINT_FILTER_PROP_CONFIG,
g_param_spec_object ("config",
"Config",
"The config object",
PIKA_TYPE_CURVES_CONFIG,
G_PARAM_READWRITE |
G_PARAM_CONSTRUCT));
}
static void
pika_operation_curves_init (PikaOperationCurves *self)
{
}
static gboolean
pika_operation_curves_process (GeglOperation *operation,
void *in_buf,
void *out_buf,
glong samples,
const GeglRectangle *roi,
gint level)
{
PikaOperationPointFilter *point = PIKA_OPERATION_POINT_FILTER (operation);
PikaCurvesConfig *config = PIKA_CURVES_CONFIG (point->config);
gfloat *src = in_buf;
gfloat *dest = out_buf;
if (! config)
return FALSE;
pika_curve_map_pixels (config->curve[0],
config->curve[1],
config->curve[2],
config->curve[3],
config->curve[4], src, dest, samples);
return TRUE;
}