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-rw-r--r--app/operations/gimpoperationcolorize.c274
1 files changed, 274 insertions, 0 deletions
diff --git a/app/operations/gimpoperationcolorize.c b/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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