swrite man page on IRIX

swrite man page on IRIX

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swrite(3G)							    swrite(3G)

NAME
     swrite - specify which stencil bits can be written

FORTRAN SPECIFICATION
     subroutine swrite(mask)
     integer*4 mask

PARAMETERS
     mask   expects a mask whose least-significant bits are used to control
	    writing of the stencil bitplanes.  Bitplanes corresponding to 1's
	    in the mask can be written, those corresponding to 0's are read-
	    only.

DESCRIPTION
     swrite specifies which of the stencil bitplanes are written both during
     normal stencil operation and stencil clear (see sclear).  Bits 0 through
     planes-1 are significant, where planes is the current size of the stencil
     buffer.

     Because only the normal framebuffer includes stencil bitplanes, swrite
     should be called only while draw mode is NORMAL.

     swrite is initialized when a window is created, and when gconfi is
     called, to enable all stencil bitplanes.

SEE ALSO
     drawmo, gconfi, sclear, stenci, stensi

NOTES
     IRIS-4D G, GT, and GTX models, as well as the Personal Iris, Indy, Iris
     Indigo Entry and XL, do not support stencil bitplanes, and therefore do
     not support swrite.  Use getgde to determine whether stencil bitplanes
     are supported.

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