_m_a_s_k Returns the stipple pattern. The initial value is all 1's.
DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
ggggllllGGGGeeeettttPPPPoooollllyyyyggggoooonnnnSSSSttttiiiipppppppplllleeee returns to _m_a_s_k a 32 x 32 polygon stipple pattern.
The pattern is packed into memory as if ggggllllRRRReeeeaaaaddddPPPPiiiixxxxeeeellllssss with both _h_e_i_g_h_t and
_w_i_d_t_h of 32, _t_y_p_e of GGGGLLLL____BBBBIIIITTTTMMMMAAAAPPPP, and _f_o_r_m_a_t of GGGGLLLL____CCCCOOOOLLLLOOOORRRR____IIIINNNNDDDDEEEEXXXX were called,
and the stipple pattern were stored in an internal 32 x 32 color index
buffer. Unlike ggggllllRRRReeeeaaaaddddPPPPiiiixxxxeeeellllssss, however, pixel transfer operations (shift,
offset, pixel map) are not applied to the returned stipple image.
NNNNOOOOTTTTEEEESSSS
If an error is generated, no change is made to the contents of _m_a_s_k.
EEEERRRRRRRROOOORRRRSSSS
GGGGLLLL____IIIINNNNVVVVAAAALLLLIIIIDDDD____OOOOPPPPEEEERRRRAAAATTTTIIIIOOOONNNN is generated if ggggllllGGGGeeeettttPPPPoooollllyyyyggggoooonnnnSSSSttttiiiipppppppplllleeee is executed
between the execution of ggggllllBBBBeeeeggggiiiinnnn and the corresponding execution of