| 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 | |