BC_Xfer xfer(output_rows, 0, out_yp,out_up,out_vp, 0,0,0,
0,0,0,0, out_x,out_y,out_w,out_h, BC_TRANSPARENCY,
out_colormodel, color,alpha, 0, out_rowspan);
BC_Xfer xfer(output_rows, 0, out_yp,out_up,out_vp, 0,0,0,
0,0,0,0, out_x,out_y,out_w,out_h, BC_TRANSPARENCY,
out_colormodel, color,alpha, 0, out_rowspan);