#define OSD_KEY_ESC         1        /* keyboard scan codes */
#define OSD_KEY_1           2        /* (courtesy of allegro.h) */
#define OSD_KEY_2           3
#define OSD_KEY_3           4
#define OSD_KEY_4           5
#define OSD_KEY_5           6
#define OSD_KEY_6           7
#define OSD_KEY_7           8
#define OSD_KEY_8           9
#define OSD_KEY_9           10
#define OSD_KEY_0           11
#define OSD_KEY_MINUS       12
#define OSD_KEY_EQUALS      13
#define OSD_KEY_BACKSPACE   14
#define OSD_KEY_TAB         15
#define OSD_KEY_Q           16
#define OSD_KEY_W           17
#define OSD_KEY_E           18
#define OSD_KEY_R           19
#define OSD_KEY_T           20
#define OSD_KEY_Y           21
#define OSD_KEY_U           22
#define OSD_KEY_I           23
#define OSD_KEY_O           24
#define OSD_KEY_P           25
#define OSD_KEY_OPENBRACE   26
#define OSD_KEY_CLOSEBRACE  27
#define OSD_KEY_ENTER       28
#define OSD_KEY_CONTROL     29
#define OSD_KEY_A           30
#define OSD_KEY_S           31
#define OSD_KEY_D           32
#define OSD_KEY_F           33
#define OSD_KEY_G           34
#define OSD_KEY_H           35
#define OSD_KEY_J           36
#define OSD_KEY_K           37
#define OSD_KEY_L           38
#define OSD_KEY_COLON       39
#define OSD_KEY_QUOTE       40
#define OSD_KEY_TILDE       41
#define OSD_KEY_LSHIFT      42
#define OSD_KEY_Z           44
#define OSD_KEY_X           45
#define OSD_KEY_C           46
#define OSD_KEY_V           47
#define OSD_KEY_B           48
#define OSD_KEY_N           49
#define OSD_KEY_M           50
#define OSD_KEY_COMMA       51
#define OSD_KEY_STOP        52
#define OSD_KEY_SLASH       53
#define OSD_KEY_RSHIFT      54
#define OSD_KEY_ASTERISK    55
#define OSD_KEY_ALT         56
#define OSD_KEY_SPACE       57
#define OSD_KEY_CAPSLOCK    58
#define OSD_KEY_F1          59
#define OSD_KEY_F2          60
#define OSD_KEY_F3          61
#define OSD_KEY_F4          62
#define OSD_KEY_F5          63
#define OSD_KEY_F6          64
#define OSD_KEY_F7          65
#define OSD_KEY_F8          66
#define OSD_KEY_F9          67
#define OSD_KEY_F10         68
#define OSD_KEY_NUMLOCK     69
#define OSD_KEY_SCRLOCK     70
#define OSD_KEY_HOME        71
#define OSD_KEY_UP          72
#define OSD_KEY_PGUP        73
#define OSD_KEY_MINUS_PAD   74
#define OSD_KEY_LEFT        75
#define OSD_KEY_5_PAD       76
#define OSD_KEY_RIGHT       77
#define OSD_KEY_PLUS_PAD    78
#define OSD_KEY_END         79
#define OSD_KEY_DOWN        80
#define OSD_KEY_PGDN        81
#define OSD_KEY_INSERT      82
#define OSD_KEY_DEL         83
#define OSD_KEY_F11         87
#define OSD_KEY_F12         88


int osd_init(void);
void osd_exit(void);
unsigned char *osd_create_display(int width,int height);
void osd_close_display(void);
int osd_obtain_pen(unsigned char red, unsigned char green, unsigned char blue);
void osd_update_display(void);
int osd_key_pressed(int keycode);