// BC_CModels::transfer
int transfer_from(VFrame *frame, int bg_color, int in_x, int in_y, int in_w, int in_h);
int transfer_from(VFrame *frame, int bg_color=0) {
// BC_CModels::transfer
int transfer_from(VFrame *frame, int bg_color, int in_x, int in_y, int in_w, int in_h);
int transfer_from(VFrame *frame, int bg_color=0) {