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1 /* |
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2 SDL - Simple DirectMedia Layer |
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3 Copyright (C) 1997-2006 Sam Lantinga |
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4 |
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5 This library is SDL_free software; you can redistribute it and/or |
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6 modify it under the terms of the GNU Lesser General Public |
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7 License as published by the Free Software Foundation; either |
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8 version 2.1 of the License, or (at your option) any later version. |
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9 |
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10 This library is distributed in the hope that it will be useful, |
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 Lesser General Public License for more details. |
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14 |
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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18 |
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19 Sam Lantinga |
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20 slouken@libsdl.org |
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21 */ |
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22 #include "SDL_config.h" |
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23 |
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24 /* This is the system specific header for the SDL joystick API */ |
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25 |
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26 #include "SDL_joystick.h" |
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27 |
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28 /* The SDL joystick structure */ |
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29 struct _SDL_Joystick { |
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30 Uint8 index; /* Device index */ |
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31 const char *name; /* Joystick name - system dependent */ |
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32 |
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33 int naxes; /* Number of axis controls on the joystick */ |
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34 Sint16 *axes; /* Current axis states */ |
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35 |
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36 int nhats; /* Number of hats on the joystick */ |
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37 Uint8 *hats; /* Current hat states */ |
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38 |
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39 int nballs; /* Number of trackballs on the joystick */ |
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40 struct balldelta { |
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41 int dx; |
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42 int dy; |
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43 } *balls; /* Current ball motion deltas */ |
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44 |
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45 int nbuttons; /* Number of buttons on the joystick */ |
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46 Uint8 *buttons; /* Current button states */ |
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47 |
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48 struct joystick_hwdata *hwdata; /* Driver dependent information */ |
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49 |
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50 int ref_count; /* Reference count for multiple opens */ |
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51 }; |
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52 |
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53 /* Function to scan the system for joysticks. |
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54 * Joystick 0 should be the system default joystick. |
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55 * This function should return the number of available joysticks, or -1 |
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56 * on an unrecoverable fatal error. |
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57 */ |
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58 extern int SDL_SYS_JoystickInit(void); |
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59 |
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60 /* Function to get the device-dependent name of a joystick */ |
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61 extern const char *SDL_SYS_JoystickName(int index); |
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62 |
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63 /* Function to open a joystick for use. |
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64 The joystick to open is specified by the index field of the joystick. |
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65 This should fill the nbuttons and naxes fields of the joystick structure. |
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66 It returns 0, or -1 if there is an error. |
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67 */ |
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68 extern int SDL_SYS_JoystickOpen(SDL_Joystick *joystick); |
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69 |
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70 /* Function to update the state of a joystick - called as a device poll. |
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71 * This function shouldn't update the joystick structure directly, |
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72 * but instead should call SDL_PrivateJoystick*() to deliver events |
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73 * and update joystick device state. |
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74 */ |
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75 extern void SDL_SYS_JoystickUpdate(SDL_Joystick *joystick); |
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76 |
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77 /* Function to close a joystick after use */ |
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78 extern void SDL_SYS_JoystickClose(SDL_Joystick *joystick); |
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79 |
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80 /* Function to perform any system-specific joystick related cleanup */ |
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81 extern void SDL_SYS_JoystickQuit(void); |
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82 |