screen_write_clearscreen
screen_write_clearscreen(sctx, bg);
screen_write_clearscreen(sctx, gc->bg);
screen_write_clearscreen(sctx, ictx->cell.cell.bg);
screen_write_clearscreen(&ctx, 8);
screen_write_clearscreen(&ctx, 8);
screen_write_clearscreen(&ctx, 8);
screen_write_clearscreen(ctx, 8);
void screen_write_clearscreen(struct screen_write_ctx *, u_int);
screen_write_clearscreen(&ctx, 8);