2008-01-29 02:45:53 +08:00
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/* GIMP - The GNU Image Manipulation Program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* gimpbrightnesscontrastconfig.c
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* Copyright (C) 2007 Michael Natterer <mitch@gimp.org>
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*
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2009-01-18 06:28:01 +08:00
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* This program is free software: you can redistribute it and/or modify
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2008-01-29 02:45:53 +08:00
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* it under the terms of the GNU General Public License as published by
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2009-01-18 06:28:01 +08:00
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* the Free Software Foundation; either version 3 of the License, or
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2008-01-29 02:45:53 +08:00
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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2018-07-12 05:27:07 +08:00
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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2008-01-29 02:45:53 +08:00
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*/
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#include "config.h"
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2013-10-15 07:58:39 +08:00
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#include <gdk-pixbuf/gdk-pixbuf.h>
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2008-01-29 02:45:53 +08:00
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#include <gegl.h>
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2008-05-18 01:57:39 +08:00
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#include "libgimpmath/gimpmath.h"
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2008-01-29 02:45:53 +08:00
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#include "libgimpconfig/gimpconfig.h"
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2012-05-11 03:22:44 +08:00
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#include "operations-types.h"
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2008-01-29 02:45:53 +08:00
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#include "gimpbrightnesscontrastconfig.h"
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2008-05-18 01:57:39 +08:00
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#include "gimplevelsconfig.h"
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2008-01-29 02:45:53 +08:00
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2014-05-15 05:34:01 +08:00
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#include "gimp-intl.h"
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2008-01-29 02:45:53 +08:00
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enum
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{
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PROP_0,
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PROP_BRIGHTNESS,
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PROP_CONTRAST
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};
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2015-04-09 07:12:43 +08:00
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static void gimp_brightness_contrast_config_iface_init (GimpConfigInterface *iface);
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static void gimp_brightness_contrast_config_get_property (GObject *object,
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guint property_id,
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GValue *value,
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GParamSpec *pspec);
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static void gimp_brightness_contrast_config_set_property (GObject *object,
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guint property_id,
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const GValue *value,
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GParamSpec *pspec);
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static gboolean gimp_brightness_contrast_config_equal (GimpConfig *a,
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GimpConfig *b);
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2008-01-29 02:45:53 +08:00
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G_DEFINE_TYPE_WITH_CODE (GimpBrightnessContrastConfig,
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gimp_brightness_contrast_config,
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app: add GimpOperationSettings
Add a new GimpOperationSettings class, to be used as a base class
for all operation-config types. The class provides options common
to all operations (namely, the clipping mode, input region, and
color options), which were previously stored in GimpFilterOptions,
and were therefore bound to the filter tool, instead of being
stored as part of the operation settings; as a result, these
options would have no effect when reapplying a filter, or when
restoring a preset.
The GimpOperationSettings options do not affect the operation
node, but rather the associated GimpDrawableFilter object. The
class provides a gimp_operation_settings_sync_drawable_filter()
function, which applies the options to the filter.
Modify all custom and auto-generated operation-config types to
derive from GimpOperationSettings, and modify the GimpConfig
functions of the former to account for the GimpOperationSettings
properties, using a set of protected functions provided by the
class.
2020-04-07 06:37:19 +08:00
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GIMP_TYPE_OPERATION_SETTINGS,
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2015-04-09 07:12:43 +08:00
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G_IMPLEMENT_INTERFACE (GIMP_TYPE_CONFIG,
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gimp_brightness_contrast_config_iface_init))
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2008-01-29 02:45:53 +08:00
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#define parent_class gimp_brightness_contrast_config_parent_class
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static void
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gimp_brightness_contrast_config_class_init (GimpBrightnessContrastConfigClass *klass)
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{
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2008-02-01 20:45:32 +08:00
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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GimpViewableClass *viewable_class = GIMP_VIEWABLE_CLASS (klass);
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2014-05-07 07:01:56 +08:00
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object_class->set_property = gimp_brightness_contrast_config_set_property;
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object_class->get_property = gimp_brightness_contrast_config_get_property;
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2008-02-01 20:45:32 +08:00
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2014-05-07 07:01:56 +08:00
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viewable_class->default_icon_name = "gimp-tool-brightness-contrast";
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2008-02-01 20:45:32 +08:00
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2016-02-12 06:44:07 +08:00
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GIMP_CONFIG_PROP_DOUBLE (object_class, PROP_BRIGHTNESS,
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"brightness",
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_("Brightness"),
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_("Brightness"),
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-1.0, 1.0, 0.0, 0);
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GIMP_CONFIG_PROP_DOUBLE (object_class, PROP_CONTRAST,
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"contrast",
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_("Contrast"),
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_("Contrast"),
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-1.0, 1.0, 0.0, 0);
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2008-01-29 02:45:53 +08:00
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}
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2015-04-09 07:12:43 +08:00
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static void
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gimp_brightness_contrast_config_iface_init (GimpConfigInterface *iface)
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{
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iface->equal = gimp_brightness_contrast_config_equal;
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}
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2008-01-29 02:45:53 +08:00
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static void
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gimp_brightness_contrast_config_init (GimpBrightnessContrastConfig *self)
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{
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}
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static void
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gimp_brightness_contrast_config_get_property (GObject *object,
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guint property_id,
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GValue *value,
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GParamSpec *pspec)
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{
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GimpBrightnessContrastConfig *self = GIMP_BRIGHTNESS_CONTRAST_CONFIG (object);
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switch (property_id)
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{
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case PROP_BRIGHTNESS:
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g_value_set_double (value, self->brightness);
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break;
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case PROP_CONTRAST:
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g_value_set_double (value, self->contrast);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
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break;
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}
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}
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static void
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gimp_brightness_contrast_config_set_property (GObject *object,
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guint property_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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GimpBrightnessContrastConfig *self = GIMP_BRIGHTNESS_CONTRAST_CONFIG (object);
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switch (property_id)
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{
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case PROP_BRIGHTNESS:
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self->brightness = g_value_get_double (value);
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break;
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case PROP_CONTRAST:
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self->contrast = g_value_get_double (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
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break;
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}
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}
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2015-04-09 07:12:43 +08:00
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static gboolean
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gimp_brightness_contrast_config_equal (GimpConfig *a,
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GimpConfig *b)
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{
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GimpBrightnessContrastConfig *config_a = GIMP_BRIGHTNESS_CONTRAST_CONFIG (a);
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GimpBrightnessContrastConfig *config_b = GIMP_BRIGHTNESS_CONTRAST_CONFIG (b);
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app: add GimpOperationSettings
Add a new GimpOperationSettings class, to be used as a base class
for all operation-config types. The class provides options common
to all operations (namely, the clipping mode, input region, and
color options), which were previously stored in GimpFilterOptions,
and were therefore bound to the filter tool, instead of being
stored as part of the operation settings; as a result, these
options would have no effect when reapplying a filter, or when
restoring a preset.
The GimpOperationSettings options do not affect the operation
node, but rather the associated GimpDrawableFilter object. The
class provides a gimp_operation_settings_sync_drawable_filter()
function, which applies the options to the filter.
Modify all custom and auto-generated operation-config types to
derive from GimpOperationSettings, and modify the GimpConfig
functions of the former to account for the GimpOperationSettings
properties, using a set of protected functions provided by the
class.
2020-04-07 06:37:19 +08:00
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if (! gimp_operation_settings_config_equal_base (a, b) ||
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config_a->brightness != config_b->brightness ||
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2015-04-09 07:12:43 +08:00
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config_a->contrast != config_b->contrast)
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{
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return FALSE;
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}
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return TRUE;
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}
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2008-01-29 02:45:53 +08:00
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/* public functions */
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2008-05-18 01:57:39 +08:00
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GimpLevelsConfig *
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gimp_brightness_contrast_config_to_levels_config (GimpBrightnessContrastConfig *config)
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{
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GimpLevelsConfig *levels;
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gdouble brightness;
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2008-09-18 06:55:55 +08:00
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gdouble slant;
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2008-05-18 01:57:39 +08:00
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gdouble value;
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g_return_val_if_fail (GIMP_IS_BRIGHTNESS_CONTRAST_CONFIG (config), NULL);
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levels = g_object_new (GIMP_TYPE_LEVELS_CONFIG, NULL);
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2020-04-14 22:59:32 +08:00
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gimp_operation_settings_config_copy_base (GIMP_CONFIG (config),
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GIMP_CONFIG (levels),
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0);
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2008-05-18 01:57:39 +08:00
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brightness = config->brightness / 2.0;
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2008-09-18 06:55:55 +08:00
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slant = tan ((config->contrast + 1) * G_PI_4);
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2008-05-18 01:57:39 +08:00
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2008-09-18 06:55:55 +08:00
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if (config->brightness >= 0)
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2008-05-18 01:57:39 +08:00
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{
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2008-09-18 06:55:55 +08:00
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value = -0.5 * slant + brightness * slant + 0.5;
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2008-05-18 01:57:39 +08:00
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2008-09-18 06:55:55 +08:00
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if (value < 0.0)
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{
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value = 0.0;
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2008-05-18 01:57:39 +08:00
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2008-09-18 06:55:55 +08:00
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/* this slightly convoluted math follows by inverting the
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* calculation of the brightness/contrast LUT in base/lut-funcs.h */
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2008-05-18 01:57:39 +08:00
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2008-09-18 06:55:55 +08:00
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levels->low_input[GIMP_HISTOGRAM_VALUE] =
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2008-09-18 07:09:29 +08:00
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(- brightness * slant + 0.5 * slant - 0.5) / (slant - brightness * slant);
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2008-09-18 06:55:55 +08:00
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}
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2008-05-18 01:57:39 +08:00
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2008-09-18 06:55:55 +08:00
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levels->low_output[GIMP_HISTOGRAM_VALUE] = value;
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value = 0.5 * slant + 0.5;
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if (value > 1.0)
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{
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value = 1.0;
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levels->high_input[GIMP_HISTOGRAM_VALUE] =
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2008-09-18 07:09:29 +08:00
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(- brightness * slant + 0.5 * slant + 0.5) / (slant - brightness * slant);
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2008-09-18 06:55:55 +08:00
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}
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2008-05-18 01:57:39 +08:00
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2008-09-18 06:55:55 +08:00
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levels->high_output[GIMP_HISTOGRAM_VALUE] = value;
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2008-05-18 01:57:39 +08:00
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}
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2008-09-18 06:55:55 +08:00
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else
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{
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value = 0.5 - 0.5 * slant;
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if (value < 0.0)
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{
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value = 0.0;
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levels->low_input[GIMP_HISTOGRAM_VALUE] =
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(0.5 * slant - 0.5) / (slant + brightness * slant);
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}
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levels->low_output[GIMP_HISTOGRAM_VALUE] = value;
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2008-05-18 01:57:39 +08:00
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2008-09-18 06:55:55 +08:00
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value = slant * brightness + slant * 0.5 + 0.5;
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if (value > 1.0)
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{
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value = 1.0;
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levels->high_input[GIMP_HISTOGRAM_VALUE] =
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(0.5 * slant + 0.5) / (slant + brightness * slant);
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}
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levels->high_output[GIMP_HISTOGRAM_VALUE] = value;
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}
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2008-05-18 01:57:39 +08:00
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return levels;
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}
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