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4721
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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 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
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23 #include "SDL_config.h"
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24
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25 #ifdef SDL_JOYSTICK_ANDROID
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26
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27 /* This is the system specific header for the SDL joystick API */
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28 #include <stdio.h> /* For the definition of NULL */
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29
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30 #include "SDL_error.h"
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31 #include "SDL_events.h"
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32 #include "SDL_joystick.h"
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33 #include "../SDL_sysjoystick.h"
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34 #include "../SDL_joystick_c.h"
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35
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36 extern float fLastAccelerometer[3];
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37
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38 const char *accelerometerName = "Android accelerometer";
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39
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40 /* Function to scan the system for joysticks.
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41 * This function should set SDL_numjoysticks to the number of available
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42 * joysticks. Joystick 0 should be the system default joystick.
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43 * It should return 0, or -1 on an unrecoverable fatal error.
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44 */
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45 int
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46 SDL_SYS_JoystickInit(void)
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47 {
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48 SDL_numjoysticks = 1;
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49
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50 return (1);
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51 }
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52
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53 /* Function to get the device-dependent name of a joystick */
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54 const char *
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55 SDL_SYS_JoystickName(int index)
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56 {
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57 if (!index)
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58 return accelerometerName;
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59 SDL_SetError("No joystick available with that index");
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60 return (NULL);
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61 }
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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 int
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69 SDL_SYS_JoystickOpen(SDL_Joystick * joystick)
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70 {
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71 joystick->nbuttons = 0;
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72 joystick->nhats = 0;
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73 joystick->nballs = 0;
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74 joystick->naxes = 3;
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75 joystick->name = accelerometerName;
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76 return 0;
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77 }
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78
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79
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80 /* Function to update the state of a joystick - called as a device poll.
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81 * This function shouldn't update the joystick structure directly,
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82 * but instead should call SDL_PrivateJoystick*() to deliver events
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83 * and update joystick device state.
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84 */
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85 void
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86 SDL_SYS_JoystickUpdate(SDL_Joystick * joystick)
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87 {
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88 int i=0;
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89 for(i=0;i<3;i++){
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90 SDL_PrivateJoystickAxis(joystick, i, fLastAccelerometer[i]);
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91 }
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92 }
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93
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94 /* Function to close a joystick after use */
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95 void
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96 SDL_SYS_JoystickClose(SDL_Joystick * joystick)
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97 {
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98 }
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99
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100 /* Function to perform any system-specific joystick related cleanup */
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101 void
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102 SDL_SYS_JoystickQuit(void)
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103 {
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104 }
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105
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106 #endif /* SDL_JOYSTICK_NDS */
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