PL_WIDTH
#define NEXT_LINE(addr) (addr + (PL_WIDTH * FB_HEIGHT))
#define SKIP_NEXT_LINE(addr) (addr += (PL_WIDTH - SL_WIDTH))
lp += ((PL_WIDTH * FB_HEIGHT) * (ymin + 1));
lq += ((PL_WIDTH * FB_HEIGHT) * ymin);
lp += (PL_WIDTH - SL_WIDTH);
lq += (PL_WIDTH - SL_WIDTH);
lq += (PL_WIDTH - SL_WIDTH);