Cls -- clear back buffer in hardware double buffer mode (V6.0, optional)
Synopsis
int error = Cls(APTR handle, ULONG color, struct hwTagList *tags);
Function
This must clear the back buffer of the hardware double buffer in the specified display
with the color specified in the second parameter. The color is specified as a 24-bit
RGB value.
Cls() is an optional API and must only be implemented if HWSDAFLAGS_DOUBLEBUFFERADAPTER
has been passed to hw_SetDisplayAdapter(). See hw_SetDisplayAdapter for details.