glGetPolygonStipple - return the polygon stipple pattern
GLubyte *mask );
Returns the stipple pattern. The initial value is all 1's.
glGetPolygonStipple() returns to mask a 32 times 32 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 32
times 32 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
GL_INVALID_OPERATION is generated if glGetPolygonStipple()
is executed between the execution of glBegin() and the
corresponding execution of glEnd().
glPixelStore(3), glPixelTransfer(3), glPolygonStipple(3),
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