Updated docs.

include/bgfx/bgfx.h

@@ -815,7 +815,14 @@ namespace bgfx
 		uint16_t m_attributes[Attrib::Count];
 	};
 
-	/// Pack vec4 into vertex stream format.
+	/// Pack vertex attribute into vertex stream format.
+	///
+	/// @param[in] _input Value to be packed into vertex stream.
+	/// @param[in] _inputNormalized True if input value is already normalized.
+	/// @param[in] _attr Attribute to pack.
+	/// @param[in] _decl Vertex stream declaration.
+	/// @param[in] _data Destination vertex stream where data will be packed.
+	/// @param[in] _index Vertex index that will be modified.
 	///
 	/// @attention C99 equivalent is `bgfx_vertex_pack`.
 	///
@@ -828,7 +835,13 @@ namespace bgfx
 		, uint32_t _index = 0
 		);
 
-	/// Unpack vec4 from vertex stream format.
+	/// Unpack vertex attribute from vertex stream format.
+	///
+	/// @param[out] _output Result of unpacking.
+	/// @param[in]  _attr Attribute to unpack.
+	/// @param[in]  _decl Vertex stream declaration.
+	/// @param[in]  _data Source vertex stream from where data will be unpacked.
+	/// @param[in]  _index Vertex index that will be unpacked.
 	///
 	/// @attention C99 equivalent is `bgfx_vertex_unpack`.
 	///