swrite(3G)swrite(3G)NAMEswrite - 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.
DESCRIPTIONswrite 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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