[gegl] gegl_coordinate_relative_to_pixel new utility function

[Øyvind Kolås <ok src gnome org>]

commit 2afeb1ff0a9d00528a15b8a216d8acd96aafadf0
Author: Øyvind Kolås <pippin gimp org>
Date:   Fri May 23 04:46:07 2014 +0200

    gegl_coordinate_relative_to_pixel new utility function
    
    Make it easier to write self documenting code for converting between relative
    and pixel based coordinates. Given either buffer width or height as argument.

 gegl/gegl-operations-util.h |   12 ++++++++++++
 1 files changed, 12 insertions(+), 0 deletions(-)
---
diff --git a/gegl/gegl-operations-util.h b/gegl/gegl-operations-util.h
index d17a915..eb57896 100644
--- a/gegl/gegl-operations-util.h
+++ b/gegl/gegl-operations-util.h
@@ -113,6 +113,18 @@ void         gegl_param_spec_set_property_key (GParamSpec  *pspec,
                                                const gchar *key_name,
                                                const gchar *value);
 
+static inline gdouble
+gegl_coordinate_relative_to_pixel (gdouble relative, gdouble pixel_dim)
+{
+    return relative * pixel_dim;
+}
+
+static inline gdouble
+gegl_coordinate_pixel_to_relative (gdouble pixel, gdouble pixel_dim)
+{
+    return pixel / pixel_dim;
+}
+
 
 G_END_DECLS