efl: Add simple API for "blur" effects

This will use the Efl.Gfx.Filter interface internally, but makes it
usable by normal people.

src/Makefile_Efl.am

@@ -40,6 +40,7 @@ efl_eolian_files = \
       lib/efl/interfaces/efl_gfx_gradient_linear.eo \
       lib/efl/interfaces/efl_gfx_gradient_radial.eo \
       lib/efl/interfaces/efl_gfx_filter.eo \
+      lib/efl/interfaces/efl_gfx_blur.eo \
       lib/efl/interfaces/efl_gfx_size_hint.eo \
       lib/efl/interfaces/efl_model.eo \
       lib/efl/interfaces/efl_animator.eo \

src/lib/efl/Efl.h

@@ -123,6 +123,7 @@ typedef Efl_Gfx_Path_Command_Type Efl_Gfx_Path_Command;
 #include "interfaces/efl_gfx_gradient_linear.eo.h"
 #include "interfaces/efl_gfx_gradient_radial.eo.h"
 #include "interfaces/efl_gfx_filter.eo.h"
+#include "interfaces/efl_gfx_blur.eo.h"
 #include "interfaces/efl_gfx_size_hint.eo.h"
 #include "interfaces/efl_gfx_color_class.eo.h"
 #include "interfaces/efl_gfx_text_class.eo.h"

src/lib/efl/interfaces/efl_gfx_blur.eo

@@ -0,0 +1,41 @@
+interface Efl.Gfx.Blur
+{
+   [[A simple API to apply blur effects.
+
+     Those API's might use @Efl.Gfx.Filter internally. It might be necessary to
+     also specify the color of the blur with @Efl.Gfx.color.
+   ]]
+   methods {
+      @property radius {
+         [[The blur radius in pixels.]]
+         values {
+            rx: double; [[The horizontal blur radius.]]
+            ry: double; [[The vertical blur radius.]]
+         }
+      }
+      @property offset {
+         [[An offset relative to the original pixels.
+
+           This property allows for drop shadow effects.
+         ]]
+         values {
+            ox: double; [[Horizontal offset in pixels.]]
+            oy: double; [[Vertical offset in pixels.]]
+         }
+      }
+      @property grow {
+         [[How much the original image should be "grown" before blurring.
+
+           Growing is a combination of blur & color levels adjustment. If the
+           value of grow is positive, the pixels will appear more "fat" or "bold"
+           than the original. If the value is negative, a shrink effect happens
+           instead.
+
+           This is can be used efficiently to create glow effects.
+         ]]
+         values {
+            radius: double; [[How much to grow the original pixel data.]]
+         }
+      }
+   }
+}

src/lib/efl/interfaces/efl_interfaces_main.c

@@ -38,6 +38,7 @@
 #include "interfaces/efl_gfx_gradient_radial.eo.c"
 
 #include "interfaces/efl_gfx_filter.eo.c"
+#include "interfaces/efl_gfx_blur.eo.c"
 
 #include "interfaces/efl_gfx_size_hint.eo.c"
 #include "interfaces/efl_canvas.eo.c"