MAX_PIXELS_PER_LINE
dst_icg = MAX_PIXELS_PER_LINE * pixsize - vout->pix.width * vout->bpp;
line_length = MAX_PIXELS_PER_LINE;
offset = ((MAX_PIXELS_PER_LINE * vout->vrfb_context[0].yoffset *
offset = MAX_PIXELS_PER_LINE * vout->vrfb_context[0].xoffset *