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1 | /* |
2 | SDL - Simple DirectMedia Layer |
3 | Copyright (C) 1997-2009 Sam Lantinga |
4 | |
5 | This library is SDL_free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either |
8 | version 2.1 of the License, or (at your option) any later version. |
9 | |
10 | This library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | Lesser General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with this library; if not, write to the Free Software |
17 | Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
18 | |
19 | Sam Lantinga |
20 | slouken@libsdl.org |
21 | */ |
22 | #include "SDL_config.h" |
23 | |
24 | /* This is the system specific header for the SDL joystick API */ |
25 | |
26 | #include "SDL_joystick.h" |
27 | |
28 | /* The SDL joystick structure */ |
29 | struct _SDL_Joystick { |
30 | Uint8 index; /* Device index */ |
31 | const char *name; /* Joystick name - system dependent */ |
32 | |
33 | int naxes; /* Number of axis controls on the joystick */ |
34 | Sint16 *axes; /* Current axis states */ |
35 | |
36 | int nhats; /* Number of hats on the joystick */ |
37 | Uint8 *hats; /* Current hat states */ |
38 | |
39 | int nballs; /* Number of trackballs on the joystick */ |
40 | struct balldelta { |
41 | int dx; |
42 | int dy; |
43 | } *balls; /* Current ball motion deltas */ |
44 | |
45 | int nbuttons; /* Number of buttons on the joystick */ |
46 | Uint8 *buttons; /* Current button states */ |
47 | |
48 | struct joystick_hwdata *hwdata; /* Driver dependent information */ |
49 | |
50 | int ref_count; /* Reference count for multiple opens */ |
51 | }; |
52 | |
53 | /* Function to scan the system for joysticks. |
54 | * Joystick 0 should be the system default joystick. |
55 | * This function should return the number of available joysticks, or -1 |
56 | * on an unrecoverable fatal error. |
57 | */ |
58 | extern int SDL_SYS_JoystickInit(void); |
59 | |
60 | /* Function to get the device-dependent name of a joystick */ |
61 | extern const char *SDL_SYS_JoystickName(int index); |
62 | |
63 | /* Function to open a joystick for use. |
64 | The joystick to open is specified by the index field of the joystick. |
65 | This should fill the nbuttons and naxes fields of the joystick structure. |
66 | It returns 0, or -1 if there is an error. |
67 | */ |
68 | extern int SDL_SYS_JoystickOpen(SDL_Joystick *joystick); |
69 | |
70 | /* Function to update the state of a joystick - called as a device poll. |
71 | * This function shouldn't update the joystick structure directly, |
72 | * but instead should call SDL_PrivateJoystick*() to deliver events |
73 | * and update joystick device state. |
74 | */ |
75 | extern void SDL_SYS_JoystickUpdate(SDL_Joystick *joystick); |
76 | |
77 | /* Function to close a joystick after use */ |
78 | extern void SDL_SYS_JoystickClose(SDL_Joystick *joystick); |
79 | |
80 | /* Function to perform any system-specific joystick related cleanup */ |
81 | extern void SDL_SYS_JoystickQuit(void); |
82 | |