int x2, y2, old_dx, old_dy, vxres, vyres;
unsigned long next_line = p->fix.line_length;
int dst_idx = 0, src_idx = 0, rev_copy = 0;
int x2, y2, old_dx, old_dy, vxres, vyres;
unsigned long next_line = p->fix.line_length;
int dst_idx = 0, src_idx = 0, rev_copy = 0;