format  Uint8 Priority = SCL_GetPriority (Uint32 surface)
 Input  surface: Screen type
 S  SCL_SPR, SCL_NBG0, SCL_NBG1, SCL_NBG2, SCL_NBG3,
 S  SCL_RBG0, SCL_RBG1, SCL_EXBG
  priority: priority number
 Output  None
 Function value  None
 Function  Get priority. 

  format  void SCL_SetColMixMode (Uint32 colMixPriority, Uint8 mode)
 Input  colMixPriority: Sprite priority number
  0-7
 mode  mode: mode
  SCL_IF_FRONT, SCL_IF_EQUAL, SCL_IF_BEHIND
 Output  None
 Function value  None
 Function  Sets color calculation conditions. 

  format  void SCL_SetColMixRate (Uint32 surfaces, Uint8 rate)
 Input  surfaces: Screen type
 S  SCL_SP0 | SCL_SP1 ... SCL_SP7 | SCL_NBG0 | SCL_NBG1 |
 S  SCL_NBG2 | SCL_NBG3 | SCL_RBG0 | SCL_RBG1 | SCL_EXBG
: : Multiple simultaneous specification is possible by using OR operation
 rate  rate: rate
  0-31
 Output  None
 Function value  None
 Function  Set the color calculation ratio.