mirror of https://github.com/GNOME/gimp.git
140 lines
4.8 KiB
C
140 lines
4.8 KiB
C
/* 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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* gimpoperationcolorize.c
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* Copyright (C) 2007 Michael Natterer <mitch@gimp.org>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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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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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <cairo.h>
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#include <gegl.h>
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#include <gdk-pixbuf/gdk-pixbuf.h>
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#include "libgimpcolor/gimpcolor.h"
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#include "operations-types.h"
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#include "gimpcolorizeconfig.h"
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#include "gimpoperationcolorize.h"
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static gboolean gimp_operation_colorize_process (GeglOperation *operation,
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void *in_buf,
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void *out_buf,
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glong samples,
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const GeglRectangle *roi,
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gint level);
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G_DEFINE_TYPE (GimpOperationColorize, gimp_operation_colorize,
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GIMP_TYPE_OPERATION_POINT_FILTER)
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#define parent_class gimp_operation_colorize_parent_class
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static void
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gimp_operation_colorize_class_init (GimpOperationColorizeClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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GeglOperationClass *operation_class = GEGL_OPERATION_CLASS (klass);
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GeglOperationPointFilterClass *point_class = GEGL_OPERATION_POINT_FILTER_CLASS (klass);
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object_class->set_property = gimp_operation_point_filter_set_property;
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object_class->get_property = gimp_operation_point_filter_get_property;
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gegl_operation_class_set_keys (operation_class,
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"name", "gimp:colorize",
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"categories", "color",
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"description", "GIMP Colorize operation",
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NULL);
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point_class->process = gimp_operation_colorize_process;
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g_object_class_install_property (object_class,
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GIMP_OPERATION_POINT_FILTER_PROP_CONFIG,
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g_param_spec_object ("config",
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"Config",
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"The config object",
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GIMP_TYPE_COLORIZE_CONFIG,
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G_PARAM_READWRITE |
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G_PARAM_CONSTRUCT));
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}
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static void
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gimp_operation_colorize_init (GimpOperationColorize *self)
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{
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}
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static gboolean
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gimp_operation_colorize_process (GeglOperation *operation,
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void *in_buf,
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void *out_buf,
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glong samples,
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const GeglRectangle *roi,
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gint level)
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{
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GimpOperationPointFilter *point = GIMP_OPERATION_POINT_FILTER (operation);
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GimpColorizeConfig *config = GIMP_COLORIZE_CONFIG (point->config);
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gfloat *src = in_buf;
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gfloat *dest = out_buf;
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GimpHSL hsl;
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if (! config)
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return FALSE;
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hsl.h = config->hue;
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hsl.s = config->saturation;
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while (samples--)
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{
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GimpRGB rgb;
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gfloat lum = GIMP_RGB_LUMINANCE (src[RED],
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src[GREEN],
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src[BLUE]);
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if (config->lightness > 0)
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{
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lum = lum * (1.0 - config->lightness);
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lum += 1.0 - (1.0 - config->lightness);
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}
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else if (config->lightness < 0)
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{
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lum = lum * (config->lightness + 1.0);
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}
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hsl.l = lum;
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gimp_hsl_to_rgb (&hsl, &rgb);
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/* the code in base/colorize.c would multiply r,b,g with lum,
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* but this is a bug since it should multiply with 255. We
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* don't repeat this bug here (this is the reason why the gegl
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* colorize is brighter than the legacy one).
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*/
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dest[RED] = rgb.r; /* * lum */
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dest[GREEN] = rgb.g; /* * lum */
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dest[BLUE] = rgb.b; /* * lum */
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dest[ALPHA] = src[ALPHA];
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src += 4;
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dest += 4;
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}
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return TRUE;
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}
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