glGetPolygonStipple -	return the polygon stipple pattern

glGetPolygonStipple
	glGetPolygonStipple() -> packed stipple
glGetPolygonStippleub
	glGetPolygonStippleub() -> stipple[][]

void glGetPolygonStipple( GLubyte *mask )

mask	Returns	the stipple pattern. The initial value is all
      1's.

glGetPolygonStipple returns to mask a	32x32 polygon stipple
pattern.  The	pattern	is packed into memory as if
glReadPixels with both height	and width of 32, type of
GL_BITMAP, and format	of GL_COLOR_INDEX were called, and the
stipple pattern were stored in an internal 32x32 color index
buffer.  Unlike glReadPixels,	however, pixel transfer
operations (shift, offset, pixel map)	are not	applied	to the
returned stipple image.

If an	error is generated, no change is made to the contents
of mask.

GL_INVALID_OPERATION is generated if glGetPolygonStipple is
executed between the execution of glBegin and	the
corresponding	execution of glEnd.

glPixelStore,	glPixelTransfer, glPolygonStipple,
glReadPixels