h6. [[Programmer's Reference Manuals]] h6(. » GCOL action h2. GCOL action A GCOL action is a logical operation to perform when rendering pixels. There are eight GCOL actions supported by the OS. |_<^{width:6em}. # |_<^. Action to perform | |<^. 0 |<^. Dest = Source | |<^. 1 |<^. Dest = Dest OR Source | |<^. 2 |<^. Dest = Dest AND Source | |<^. 3 |<^. Dest = Dest EOR Source | |<^. 4 |<^. Dest = NOT Dest | |<^. 5 |<^. Dest = Dest | |<^. 6 |<^. Dest = Dest AND NOT Source | |<^. 7 |<^. Dest = Dest OR NOT Source | h4. See also * [[OS_SetColour]] * [[OS_SetColour Flags]]