getwri(3G)

getwri - returns the current writemask

As shipped in IRIX 6.5.5. Unchanged since IRIX 6.5.

NAME
     getwri - returns the current writemask

FORTRAN 77 SPECIFICATION
     integer*4 function getwri()

PARAMETERS
     none

FUNCTION RETURN VALUE
     The returned value of this function is the current writemask for the
     current drawing mode.

DESCRIPTION
     getwri returns the current writemask of the current drawing mode.  Each
     bit in the writemask corresponds to an available bitplane. Thus, bit 2
     describes bitplane 2 and so on. When a bit is set to zero in the
     writemask, the corresponding bitplane is read only. This routine is
     undefined in RGB mode.

SEE ALSO
     RGBwri, writem, drawmo

NOTE
     This routine is available only in immediate mode.