fglStencilMask(3G)

NAME
     fglStencilMask - control the writing of individual bits in the stencil
     planes


FORTRAN SPECIFICATION
     SUBROUTINE fglStencilMask( INTEGER*4 mask )


PARAMETERS
     mask  Specifies a bit mask to enable and disable writing of individual
           bits in the stencil planes.  Initially, the mask is all 1's.

DESCRIPTION
     fglStencilMask controls the writing of individual bits in the stencil
     planes.  The least significant n bits of mask, where n is the number of
     bits in the stencil buffer, specify a mask.  Where a 1 appears in the
     mask, it's possible to write to the corresponding bit in the stencil
     buffer.  Where a 0 appears, the corresponding bit is write-protected.
     Initially, all bits are enabled for writing.

ERRORS
     GL_INVALID_OPERATION is generated if fglStencilMask is executed between
     the execution of fglBegin and the corresponding execution of fglEnd.

ASSOCIATED GETS
     fglGet with argument GL_STENCIL_WRITEMASK
     fglGet with argument GL_STENCIL_BITS


SEE ALSO
     fglColorMask, fglDepthMask, fglIndexMask, fglStencilFunc, fglStencilOp