[clutter-gst] crop: add cull-backface property

[Lionel Landwerlin <llandwerlin src gnome org>]

commit 7a35d17cf501979859d22f5da28f6229be7275d6
Author: Lionel Landwerlin <llandwerlin gmail com>
Date:   Mon Mar 18 15:28:37 2013 +0000

    crop: add cull-backface property

 clutter-gst/clutter-gst-crop.c |   25 +++++++++++++++++++++++++
 1 files changed, 25 insertions(+), 0 deletions(-)
---
diff --git a/clutter-gst/clutter-gst-crop.c b/clutter-gst/clutter-gst-crop.c
index 5ffd134..857e611 100644
--- a/clutter-gst/clutter-gst-crop.c
+++ b/clutter-gst/clutter-gst-crop.c
@@ -40,6 +40,7 @@ struct _ClutterGstCropPrivate
   ClutterActorBox output_region;
 
   gboolean paint_borders;
+  gboolean cull_backface;
 };
 
 enum
@@ -47,6 +48,7 @@ enum
   PROP_0,
 
   PROP_PAINT_BORDERS,
+  PROP_CULL_BACKFACE,
   PROP_INPUT_REGION,
   PROP_OUTPUT_REGION
 };
@@ -72,6 +74,9 @@ clutter_gst_crop_paint_frame (ClutterGstActor *self,
                               paint_opacity,
                               paint_opacity,
                               paint_opacity);
+  if (priv->cull_backface)
+    cogl_pipeline_set_cull_face_mode (frame->pipeline,
+                                      COGL_PIPELINE_CULL_FACE_MODE_BACK);
   cogl_set_source (frame->pipeline);
 
   cogl_rectangle_with_texture_coords (priv->output_region.x1 * box_width,
@@ -145,6 +150,9 @@ clutter_gst_crop_get_property (GObject    *object,
     case PROP_PAINT_BORDERS:
       g_value_set_boolean (value, priv->paint_borders);
       break;
+    case PROP_CULL_BACKFACE:
+      g_value_set_boolean (value, priv->cull_backface);
+      break;
     case PROP_INPUT_REGION:
       box = (ClutterActorBox *) g_value_get_boxed (value);
       *box = priv->input_region;
@@ -172,6 +180,9 @@ clutter_gst_crop_set_property (GObject      *object,
     case PROP_PAINT_BORDERS:
       priv->paint_borders = g_value_get_boolean (value);
       break;
+    case PROP_CULL_BACKFACE:
+      priv->cull_backface = g_value_get_boolean (value);
+      break;
     case PROP_INPUT_REGION:
       box = (ClutterActorBox *) g_value_get_boxed (value);
       if (_validate_box (box))
@@ -234,6 +245,20 @@ clutter_gst_crop_class_init (ClutterGstCropClass *klass)
   g_object_class_install_property (object_class, PROP_PAINT_BORDERS, pspec);
 
   /**
+   * ClutterGstCrop:cull-backface:
+   *
+   * Whether to cull the backface of the actor
+   *
+   * Since: 3.0
+   */
+  pspec = g_param_spec_boolean ("cull-backface",
+                                "Cull Backface",
+                                "Cull the backface of the actor",
+                                FALSE,
+                                CLUTTER_GST_PARAM_READWRITE);
+  g_object_class_install_property (object_class, PROP_CULL_BACKFACE, pspec);
+
+  /**
    * ClutterGstCrop:input-region:
    *
    * Input region in the video frame (all values between 0 and 1).