Adding upstream version 2.10.22.upstream/2.10.22upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 257 insertions, 0 deletions

diff --git a/app/operations/gimpoperationdesaturate.c b/app/operations/gimpoperationdesaturate.c
new file mode 100644
index 0000000..9f833db
--- /dev/null
+++ b/app/operations/gimpoperationdesaturate.c
@@ -0,0 +1,257 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationdesaturate.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 <gegl.h>
+#include <gdk-pixbuf/gdk-pixbuf.h>
+
+#include "libgimpcolor/gimpcolor.h"
+#include "libgimpconfig/gimpconfig.h"
+
+#include "operations-types.h"
+
+#include "gimpoperationdesaturate.h"
+
+#include "gimp-intl.h"
+
+
+enum
+{
+  PROP_0,
+  PROP_MODE
+};
+
+
+static void     gimp_operation_desaturate_get_property (GObject             *object,
+                                                        guint                property_id,
+                                                        GValue              *value,
+                                                        GParamSpec          *pspec);
+static void     gimp_operation_desaturate_set_property (GObject             *object,
+                                                        guint                property_id,
+                                                        const GValue        *value,
+                                                        GParamSpec          *pspec);
+
+static void     gimp_operation_desaturate_prepare      (GeglOperation       *operation);
+static gboolean gimp_operation_desaturate_process      (GeglOperation       *operation,
+                                                        void                *in_buf,
+                                                        void                *out_buf,
+                                                        glong                samples,
+                                                        const GeglRectangle *roi,
+                                                        gint                 level);
+
+
+G_DEFINE_TYPE (GimpOperationDesaturate, gimp_operation_desaturate,
+               GIMP_TYPE_OPERATION_POINT_FILTER)
+
+#define parent_class gimp_operation_desaturate_parent_class
+
+
+static void
+gimp_operation_desaturate_class_init (GimpOperationDesaturateClass *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 = gimp_operation_desaturate_set_property;
+  object_class->get_property = gimp_operation_desaturate_get_property;
+
+  operation_class->prepare   = gimp_operation_desaturate_prepare;
+
+  point_class->process       = gimp_operation_desaturate_process;
+
+  gegl_operation_class_set_keys (operation_class,
+                                 "name",        "gimp:desaturate",
+                                 "categories",  "color",
+                                 "description", _("Turn colors into shades of gray"),
+                                 NULL);
+
+  GIMP_CONFIG_PROP_ENUM (object_class, PROP_MODE,
+                         "mode",
+                         _("Mode"),
+                         _("Choose shade of gray based on"),
+                         GIMP_TYPE_DESATURATE_MODE,
+                         GIMP_DESATURATE_LUMINANCE,
+                         GIMP_PARAM_STATIC_STRINGS);
+}
+
+static void
+gimp_operation_desaturate_init (GimpOperationDesaturate *self)
+{
+}
+
+static void
+gimp_operation_desaturate_get_property (GObject    *object,
+                                        guint       property_id,
+                                        GValue     *value,
+                                        GParamSpec *pspec)
+{
+  GimpOperationDesaturate *desaturate = GIMP_OPERATION_DESATURATE (object);
+
+  switch (property_id)
+    {
+    case PROP_MODE:
+      g_value_set_enum (value, desaturate->mode);
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+      break;
+    }
+}
+
+static void
+gimp_operation_desaturate_set_property (GObject      *object,
+                                        guint         property_id,
+                                        const GValue *value,
+                                        GParamSpec   *pspec)
+{
+  GimpOperationDesaturate *desaturate = GIMP_OPERATION_DESATURATE (object);
+
+  switch (property_id)
+    {
+    case PROP_MODE:
+      desaturate->mode = g_value_get_enum (value);
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+      break;
+    }
+}
+
+static void
+gimp_operation_desaturate_prepare (GeglOperation *operation)
+{
+  GimpOperationDesaturate *desaturate = GIMP_OPERATION_DESATURATE (operation);
+  const Babl              *format = gegl_operation_get_source_format (operation, "input");
+
+  if (desaturate->mode == GIMP_DESATURATE_LUMINANCE)
+    {
+      format = babl_format_with_space ("RGBA float", format);
+    }
+  else
+    {
+      format = babl_format_with_space ("R'G'B'A float", format);
+    }
+
+  gegl_operation_set_format (operation, "input",  format);
+  gegl_operation_set_format (operation, "output", format);
+}
+
+static gboolean
+gimp_operation_desaturate_process (GeglOperation       *operation,
+                                   void                *in_buf,
+                                   void                *out_buf,
+                                   glong                samples,
+                                   const GeglRectangle *roi,
+                                   gint                 level)
+{
+  GimpOperationDesaturate *desaturate = GIMP_OPERATION_DESATURATE (operation);
+  gfloat                  *src        = in_buf;
+  gfloat                  *dest       = out_buf;
+
+  switch (desaturate->mode)
+    {
+    case GIMP_DESATURATE_LIGHTNESS:
+      /* This is the formula for Lightness in the HSL "bi-hexcone"
+       * model: https://en.wikipedia.org/wiki/HSL_and_HSV
+       */
+      while (samples--)
+        {
+          gfloat min, max, value;
+
+          max = MAX (src[0], src[1]);
+          max = MAX (max, src[2]);
+          min = MIN (src[0], src[1]);
+          min = MIN (min, src[2]);
+
+          value = (max + min) / 2;
+
+          dest[0] = value;
+          dest[1] = value;
+          dest[2] = value;
+          dest[3] = src[3];
+
+          src  += 4;
+          dest += 4;
+        }
+      break;
+
+    case GIMP_DESATURATE_LUMA:
+    case GIMP_DESATURATE_LUMINANCE:
+      while (samples--)
+        {
+          gfloat value = GIMP_RGB_LUMINANCE (src[0], src[1], src[2]);
+
+          dest[0] = value;
+          dest[1] = value;
+          dest[2] = value;
+          dest[3] = src[3];
+
+          src  += 4;
+          dest += 4;
+        }
+      break;
+
+    case GIMP_DESATURATE_AVERAGE:
+      /* This is the formula for Intensity in the HSI model:
+       * https://en.wikipedia.org/wiki/HSL_and_HSV
+       */
+      while (samples--)
+        {
+          gfloat value = (src[0] + src[1] + src[2]) / 3;
+
+          dest[0] = value;
+          dest[1] = value;
+          dest[2] = value;
+          dest[3] = src[3];
+
+          src  += 4;
+          dest += 4;
+        }
+      break;
+
+    case GIMP_DESATURATE_VALUE:
+      /* This is the formula for Value in the HSV model:
+       * https://en.wikipedia.org/wiki/HSL_and_HSV
+       */
+      while (samples--)
+        {
+          gfloat value;
+
+          value = MAX (src[0], src[1]);
+          value = MAX (value, src[2]);
+
+          dest[0] = value;
+          dest[1] = value;
+          dest[2] = value;
+          dest[3] = src[3];
+
+          src  += 4;
+          dest += 4;
+        }
+      break;
+    }
+
+  return TRUE;
+}