Mercurial > sdl-ios-xcode
diff src/joystick/android/SDL_sysjoystick.c @ 4721:7bb9d3a3f257
Added accelerometer 'joystick'
author | Paul Hunkin <paul@bieh.net> |
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date | Tue, 27 Jul 2010 21:20:17 +0200 |
parents | |
children | 6a10693e66c3 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/joystick/android/SDL_sysjoystick.c Tue Jul 27 21:20:17 2010 +0200 @@ -0,0 +1,106 @@ +/* + SDL - Simple DirectMedia Layer + Copyright (C) 1997-2010 Sam Lantinga + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + This library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with this library; if not, write to the Free Software + Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + + Sam Lantinga + slouken@libsdl.org +*/ + +#include "SDL_config.h" + +#ifdef SDL_JOYSTICK_ANDROID + +/* This is the system specific header for the SDL joystick API */ +#include <stdio.h> /* For the definition of NULL */ + +#include "SDL_error.h" +#include "SDL_events.h" +#include "SDL_joystick.h" +#include "../SDL_sysjoystick.h" +#include "../SDL_joystick_c.h" + +extern float fLastAccelerometer[3]; + +const char *accelerometerName = "Android accelerometer"; + +/* Function to scan the system for joysticks. + * This function should set SDL_numjoysticks to the number of available + * joysticks. Joystick 0 should be the system default joystick. + * It should return 0, or -1 on an unrecoverable fatal error. + */ +int +SDL_SYS_JoystickInit(void) +{ + SDL_numjoysticks = 1; + +return (1); +} + +/* Function to get the device-dependent name of a joystick */ +const char * +SDL_SYS_JoystickName(int index) +{ + if (!index) + return accelerometerName; + SDL_SetError("No joystick available with that index"); + return (NULL); +} + +/* Function to open a joystick for use. + The joystick to open is specified by the index field of the joystick. + This should fill the nbuttons and naxes fields of the joystick structure. + It returns 0, or -1 if there is an error. + */ +int +SDL_SYS_JoystickOpen(SDL_Joystick * joystick) +{ + joystick->nbuttons = 0; + joystick->nhats = 0; + joystick->nballs = 0; + joystick->naxes = 3; + joystick->name = accelerometerName; + return 0; +} + + +/* Function to update the state of a joystick - called as a device poll. + * This function shouldn't update the joystick structure directly, + * but instead should call SDL_PrivateJoystick*() to deliver events + * and update joystick device state. + */ + void +SDL_SYS_JoystickUpdate(SDL_Joystick * joystick) +{ + int i=0; + for(i=0;i<3;i++){ + SDL_PrivateJoystickAxis(joystick, i, fLastAccelerometer[i]); + } +} + +/* Function to close a joystick after use */ +void +SDL_SYS_JoystickClose(SDL_Joystick * joystick) +{ +} + +/* Function to perform any system-specific joystick related cleanup */ +void +SDL_SYS_JoystickQuit(void) +{ +} + +#endif /* SDL_JOYSTICK_NDS */