+#define CV_RELATIVE_L1 (CV_RELATIVE | CV_L1)\r
+
+#define CV_RELATIVE_L2 (CV_RELATIVE | CV_L2)\r
+
+#define CV_REDUCE_SUM 0\r
+
+#define CV_REDUCE_AVG 1\r
+
+#define CV_REDUCE_MAX 2\r
+
+#define CV_REDUCE_MIN 3\r
+
+#define CV_DXT_FORWARD 0\r
+
+#define CV_DXT_INVERSE 1\r