Adding upstream version 2.10.36.upstream/2.10.36

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

1 files changed, 165 insertions, 0 deletions

diff --git a/app/operations/gimpoperationposterize.c b/app/operations/gimpoperationposterize.c
new file mode 100644
index 0000000..88f5d26
--- /dev/null
+++ b/app/operations/gimpoperationposterize.c
@@ -0,0 +1,165 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpoperationposterize.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 "libgimpconfig/gimpconfig.h"
+#include "libgimpmath/gimpmath.h"
+
+#include "operations-types.h"
+
+#include "gimpoperationposterize.h"
+
+#include "gimp-intl.h"
+
+
+enum
+{
+  PROP_0,
+  PROP_LEVELS
+};
+
+
+static void     gimp_operation_posterize_get_property (GObject             *object,
+                                                       guint                property_id,
+                                                       GValue              *value,
+                                                       GParamSpec          *pspec);
+static void     gimp_operation_posterize_set_property (GObject             *object,
+                                                       guint                property_id,
+                                                       const GValue        *value,
+                                                       GParamSpec          *pspec);
+
+static gboolean gimp_operation_posterize_process      (GeglOperation       *operation,
+                                                       void                *in_buf,
+                                                       void                *out_buf,
+                                                       glong                samples,
+                                                       const GeglRectangle *roi,
+                                                       gint                 level);
+
+
+G_DEFINE_TYPE (GimpOperationPosterize, gimp_operation_posterize,
+               GIMP_TYPE_OPERATION_POINT_FILTER)
+
+#define parent_class gimp_operation_posterize_parent_class
+
+
+static void
+gimp_operation_posterize_class_init (GimpOperationPosterizeClass *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_posterize_set_property;
+  object_class->get_property = gimp_operation_posterize_get_property;
+
+  point_class->process       = gimp_operation_posterize_process;
+
+  gegl_operation_class_set_keys (operation_class,
+                                 "name",        "gimp:posterize",
+                                 "categories",  "color",
+                                 "description", _("Reduce to a limited set of colors"),
+                                 NULL);
+
+  GIMP_CONFIG_PROP_INT (object_class, PROP_LEVELS,
+                        "levels",
+                        _("Posterize levels"),
+                        NULL,
+                        2, 256, 3,
+                        GIMP_PARAM_STATIC_STRINGS);
+}
+
+static void
+gimp_operation_posterize_init (GimpOperationPosterize *self)
+{
+}
+
+static void
+gimp_operation_posterize_get_property (GObject    *object,
+                                       guint       property_id,
+                                       GValue     *value,
+                                       GParamSpec *pspec)
+{
+  GimpOperationPosterize *posterize = GIMP_OPERATION_POSTERIZE (object);
+
+  switch (property_id)
+    {
+    case PROP_LEVELS:
+      g_value_set_int (value, posterize->levels);
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+      break;
+    }
+}
+
+static void
+gimp_operation_posterize_set_property (GObject      *object,
+                                       guint         property_id,
+                                       const GValue *value,
+                                       GParamSpec   *pspec)
+{
+  GimpOperationPosterize *posterize = GIMP_OPERATION_POSTERIZE (object);
+
+  switch (property_id)
+    {
+    case PROP_LEVELS:
+      posterize->levels = g_value_get_int (value);
+      break;
+
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+      break;
+    }
+}
+
+static gboolean
+gimp_operation_posterize_process (GeglOperation       *operation,
+                                  void                *in_buf,
+                                  void                *out_buf,
+                                  glong                samples,
+                                  const GeglRectangle *roi,
+                                  gint                 level)
+{
+  GimpOperationPosterize *posterize = GIMP_OPERATION_POSTERIZE (operation);
+  gfloat                 *src       = in_buf;
+  gfloat                 *dest      = out_buf;
+  gfloat                  levels;
+
+  levels = posterize->levels - 1.0;
+
+  while (samples--)
+    {
+      dest[RED]   = RINT (src[RED]   * levels) / levels;
+      dest[GREEN] = RINT (src[GREEN] * levels) / levels;
+      dest[BLUE]  = RINT (src[BLUE]  * levels) / levels;
+      dest[ALPHA] = RINT (src[ALPHA] * levels) / levels;
+
+      src  += 4;
+      dest += 4;
+    }
+
+  return TRUE;
+}