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annotate src/joystick/SDL_sysjoystick.h @ 4605:0b3a509c53a0

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Respect environment variables.
author Sunny Sachanandani <sunnysachanandani@gmail.com>
date Mon, 19 Jul 2010 21:02:49 +0530
parents f7b03b6838cb
children b530ef003506
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2010 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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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 {
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31 Uint8 index; /* Device index */
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32 const char *name; /* Joystick name - system dependent */
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33
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34 int naxes; /* Number of axis controls on the joystick */
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35 Sint16 *axes; /* Current axis states */
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36
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37 int nhats; /* Number of hats on the joystick */
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38 Uint8 *hats; /* Current hat states */
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39
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40 int nballs; /* Number of trackballs on the joystick */
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41 struct balldelta
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42 {
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43 int dx;
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44 int dy;
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45 } *balls; /* Current ball motion deltas */
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46
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47 int nbuttons; /* Number of buttons on the joystick */
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48 Uint8 *buttons; /* Current button states */
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49
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50 struct joystick_hwdata *hwdata; /* Driver dependent information */
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51
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52 int ref_count; /* Reference count for multiple opens */
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53 };
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54
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55 /* Function to scan the system for joysticks.
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56 * Joystick 0 should be the system default joystick.
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57 * This function should return the number of available joysticks, or -1
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58 * on an unrecoverable fatal error.
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59 */
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60 extern int SDL_SYS_JoystickInit(void);
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61
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62 /* Function to get the device-dependent name of a joystick */
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63 extern const char *SDL_SYS_JoystickName(int index);
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64
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65 /* Function to open a joystick for use.
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66 The joystick to open is specified by the index field of the joystick.
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67 This should fill the nbuttons and naxes fields of the joystick structure.
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68 It returns 0, or -1 if there is an error.
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69 */
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70 extern int SDL_SYS_JoystickOpen(SDL_Joystick * joystick);
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71
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72 /* Function to update the state of a joystick - called as a device poll.
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73 * This function shouldn't update the joystick structure directly,
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74 * but instead should call SDL_PrivateJoystick*() to deliver events
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75 * and update joystick device state.
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76 */
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77 extern void SDL_SYS_JoystickUpdate(SDL_Joystick * joystick);
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78
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79 /* Function to close a joystick after use */
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80 extern void SDL_SYS_JoystickClose(SDL_Joystick * joystick);
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81
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82 /* Function to perform any system-specific joystick related cleanup */
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83 extern void SDL_SYS_JoystickQuit(void);
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84
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85 /* vi: set ts=4 sw=4 expandtab: */