int val = GetBitMapAttr(APTR handle, int attr, struct hwTagList *tags);
attr
parameter will tell you which information you have to return. The following attributes
are currently recognized:
HWBMATTR_WIDTH:
HWBMATTR_HEIGHT:
HWBMATTR_BYTESPERROW:
GetBitMapAttr()
is an optional API and must only be implemented if HWSDAFLAGS_BITMAPADAPTER
has been passed to hw_SetDisplayAdapter(). See hw_SetDisplayAdapter for details.
NULL
)