+const char * const ATLAS_RECT_UNIFORM_NAME( "uAtlasRect" );
+const char * const PIXEL_AREA_UNIFORM_NAME( "pixelArea" );
+const char * const WRAP_MODE_UNIFORM_NAME( "wrapMode" );
+const char * const IMAGE_WRAP_MODE_U("wrapModeU");
+const char * const IMAGE_WRAP_MODE_V("wrapModeV");