void text_moveto(struct Bitmap *bm, int row, int col);
void text_setcoord(struct Bitmap *bm, int x, int y);
int text_putchar(char c, struct Bitmap *bm);
void text_moveto(struct Bitmap *bm, int row, int col);
void text_setcoord(struct Bitmap *bm, int x, int y);
int text_putchar(char c, struct Bitmap *bm);