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gimp/app/operations/gimpoperationcolorize.c

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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimpoperationcolorize.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 "libgimpcolor/gimpcolor.h"
#include "libgimpconfig/gimpconfig.h"
#include "operations-types.h"
#include "gimpoperationcolorize.h"
#include "gimp-intl.h"
enum
{
PROP_0,
PROP_HUE,
PROP_SATURATION,
PROP_LIGHTNESS,
PROP_COLOR
};
static void gimp_operation_colorize_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static void gimp_operation_colorize_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static gboolean gimp_operation_colorize_process (GeglOperation *operation,
void *in_buf,
void *out_buf,
glong samples,
const GeglRectangle *roi,
gint level);
G_DEFINE_TYPE (GimpOperationColorize, gimp_operation_colorize,
GIMP_TYPE_OPERATION_POINT_FILTER)
#define parent_class gimp_operation_colorize_parent_class
static void
gimp_operation_colorize_class_init (GimpOperationColorizeClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GeglOperationClass *operation_class = GEGL_OPERATION_CLASS (klass);
GeglOperationPointFilterClass *point_class = GEGL_OPERATION_POINT_FILTER_CLASS (klass);
GimpHSL hsl;
GimpRGB rgb;
object_class->set_property = gimp_operation_colorize_set_property;
object_class->get_property = gimp_operation_colorize_get_property;
gegl_operation_class_set_keys (operation_class,
"name", "gimp:colorize",
"categories", "color",
"description", _("Colorize the image"),
NULL);
point_class->process = gimp_operation_colorize_process;
GIMP_CONFIG_PROP_DOUBLE (object_class, PROP_HUE,
"hue",
_("Hue"),
_("Hue"),
0.0, 1.0, 0.5, 0);
GIMP_CONFIG_PROP_DOUBLE (object_class, PROP_SATURATION,
"saturation",
_("Saturation"),
_("Saturation"),
0.0, 1.0, 0.5, 0);
GIMP_CONFIG_PROP_DOUBLE (object_class, PROP_LIGHTNESS,
"lightness",
_("Lightness"),
_("Lightness"),
-1.0, 1.0, 0.0, 0);
gimp_hsl_set (&hsl, 0.5, 0.5, 0.5);
gimp_hsl_set_alpha (&hsl, 1.0);
gimp_hsl_to_rgb (&hsl, &rgb);
g_object_class_install_property (object_class, PROP_COLOR,
gimp_param_spec_rgb ("color",
_("Color"),
_("Color"),
FALSE, &rgb,
G_PARAM_READWRITE));
}
static void
gimp_operation_colorize_init (GimpOperationColorize *self)
{
}
static void
gimp_operation_colorize_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GimpOperationColorize *self = GIMP_OPERATION_COLORIZE (object);
switch (property_id)
{
case PROP_HUE:
g_value_set_double (value, self->hue);
break;
case PROP_SATURATION:
g_value_set_double (value, self->saturation);
break;
case PROP_LIGHTNESS:
g_value_set_double (value, self->lightness);
break;
case PROP_COLOR:
{
GimpHSL hsl;
GimpRGB rgb;
gimp_hsl_set (&hsl,
self->hue,
self->saturation,
(self->lightness + 1.0) / 2.0);
gimp_hsl_set_alpha (&hsl, 1.0);
gimp_hsl_to_rgb (&hsl, &rgb);
gimp_value_set_rgb (value, &rgb);
}
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_operation_colorize_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GimpOperationColorize *self = GIMP_OPERATION_COLORIZE (object);
switch (property_id)
{
case PROP_HUE:
self->hue = g_value_get_double (value);
g_object_notify (object, "color");
break;
case PROP_SATURATION:
self->saturation = g_value_get_double (value);
g_object_notify (object, "color");
break;
case PROP_LIGHTNESS:
self->lightness = g_value_get_double (value);
g_object_notify (object, "color");
break;
case PROP_COLOR:
{
GimpRGB rgb;
GimpHSL hsl;
gimp_value_get_rgb (value, &rgb);
gimp_rgb_to_hsl (&rgb, &hsl);
if (hsl.h == -1)
hsl.h = self->hue;
if (hsl.l == 0.0 || hsl.l == 1.0)
hsl.s = self->saturation;
g_object_set (self,
"hue", hsl.h,
"saturation", hsl.s,
"lightness", hsl.l * 2.0 - 1.0,
NULL);
}
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static gboolean
gimp_operation_colorize_process (GeglOperation *operation,
void *in_buf,
void *out_buf,
glong samples,
const GeglRectangle *roi,
gint level)
{
GimpOperationColorize *colorize = GIMP_OPERATION_COLORIZE (operation);
gfloat *src = in_buf;
gfloat *dest = out_buf;
GimpHSL hsl;
hsl.h = colorize->hue;
hsl.s = colorize->saturation;
while (samples--)
{
GimpRGB rgb;
gfloat lum = GIMP_RGB_LUMINANCE (src[RED],
src[GREEN],
src[BLUE]);
if (colorize->lightness > 0)
{
lum = lum * (1.0 - colorize->lightness);
lum += 1.0 - (1.0 - colorize->lightness);
}
else if (colorize->lightness < 0)
{
lum = lum * (colorize->lightness + 1.0);
}
hsl.l = lum;
gimp_hsl_to_rgb (&hsl, &rgb);
/* the code in base/colorize.c would multiply r,b,g with lum,
* but this is a bug since it should multiply with 255. We
* don't repeat this bug here (this is the reason why the gegl
* colorize is brighter than the legacy one).
*/
dest[RED] = rgb.r; /* * lum */
dest[GREEN] = rgb.g; /* * lum */
dest[BLUE] = rgb.b; /* * lum */
dest[ALPHA] = src[ALPHA];
src += 4;
dest += 4;
}
return TRUE;
}
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