diff --git a/trle.c b/trle.c
new file mode 100644
index 0000000..88ad047
--- /dev/null
+++ b/trle.c
@@ -0,0 +1,16 @@
+#include <string.h>
+
+#include "rfb-proto.h"
+
+struct vnc_fb {
+	uint8_t *data;
+	uint32_t pixfmt;
+	uint32_t width;
+	uint32_t height;
+};
+
+void rfb_zrle_encode_tile(uint8_t *dst, uint32_t dst_pixfmt,
+			  const struct vnc_fb *src)
+{
+	
+}