NAME
	  fglPolygonStipple - set the polygon stippling	pattern


     FORTRAN SPECIFICATION
	  SUBROUTINE fglPolygonStipple(	CHARACTER*256 mask )


     PARAMETERS
	  mask	Specifies a pointer to a 32x32 stipple pattern that
		will be	unpacked from memory in	the same way that
		fglDrawPixels unpacks pixels.

     DESCRIPTION
	  Polygon stippling, like line stippling (see fglLineStipple),
	  masks	out certain fragments produced by rasterization,
	  creating a pattern.  Stippling is independent	of polygon
	  antialiasing.

	  mask is a pointer to a 32x32 stipple pattern that is stored
	  in memory just like the pixel	data supplied to a
	  fglDrawPixels	call with height and width both	equal to 32, a
	  pixel	format of GL_COLOR_INDEX, and data type	of GL_BITMAP.
	  That is, the stipple pattern is represented as a 32x32 array
	  of 1-bit color indices packed	in unsigned bytes.
	  fglPixelStore	parameters like	GL_UNPACK_SWAP_BYTES and
	  GL_UNPACK_LSB_FIRST affect the assembling of the bits	into a
	  stipple pattern.  Pixel transfer operations (shift, offset,
	  pixel	map) are not applied to	the stipple image, however.

	  To enable and	disable	polygon	stippling, call	fglEnable and
	  fglDisable with argument GL_POLYGON_STIPPLE. Polygon
	  stippling is initially disabled. If it's enabled, a
	  rasterized polygon fragment with window coordinates x	 and
	  y  is	sent to	the next stage of the GL if and	only ifwthe
	  (x  mod 32)th	bit in the (y  mod 32)th row of	the stipple
	  pattern is 1 (one).  When polygon stippling is disabled, it
	  is as	if the stipple pattern consists	of all 1's.

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

     ASSOCIATED	GETS
	  fglGetPolygonStipple
	  fglIsEnabled with argument GL_POLYGON_STIPPLE

     SEE ALSO
	  fglDrawPixels, fglLineStipple, fglPixelStore,
	  fglPixelTransfer