diff --git a/src/joystick/android/SDL_sysjoystick.c b/src/joystick/android/SDL_sysjoystick.c new file mode 100644 index 000000000..2e2d98a02 --- /dev/null +++ b/src/joystick/android/SDL_sysjoystick.c @@ -0,0 +1,156 @@ +/* + Simple DirectMedia Layer + Copyright (C) 1997-2013 Sam Lantinga + + This software is provided 'as-is', without any express or implied + warranty. In no event will the authors be held liable for any damages + arising from the use of this software. + + Permission is granted to anyone to use this software for any purpose, + including commercial applications, and to alter it and redistribute it + freely, subject to the following restrictions: + + 1. The origin of this software must not be misrepresented; you must not + claim that you wrote the original software. If you use this software + in a product, an acknowledgment in the product documentation would be + appreciated but is not required. + 2. Altered source versions must be plainly marked as such, and must not be + misrepresented as being the original software. + 3. This notice may not be removed or altered from any source distribution. +*/ + +#include "SDL_config.h" + +#ifdef SDL_JOYSTICK_ANDROID + +/* This is the system specific header for the SDL joystick API */ +#include /* 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" +#include "../../core/android/SDL_android.h" + +static 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) +{ + return (1); +} + +int SDL_SYS_NumJoysticks() +{ + return 1; +} + +void SDL_SYS_JoystickDetect() +{ +} + +SDL_bool SDL_SYS_JoystickNeedsPolling() +{ + return SDL_FALSE; +} + +/* Function to get the device-dependent name of a joystick */ +const char * +SDL_SYS_JoystickNameForDeviceIndex(int device_index) +{ + return accelerometerName; +} + +/* Function to perform the mapping from device index to the instance id for this index */ +SDL_JoystickID SDL_SYS_GetInstanceIdOfDeviceIndex(int device_index) +{ + return device_index; +} + +/* 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, int device_index) +{ + if (device_index == 0) { + joystick->nbuttons = 0; + joystick->nhats = 0; + joystick->nballs = 0; + joystick->naxes = 3; + return 0; + } else { + SDL_SetError("No joystick available with that index"); + return (-1); + } +} + +/* Function to determine is this joystick is attached to the system right now */ +SDL_bool SDL_SYS_JoystickAttached(SDL_Joystick *joystick) +{ + return SDL_TRUE; +} + +/* 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; + Sint16 value; + float values[3]; + + if (Android_JNI_GetAccelerometerValues(values)) { + for ( i = 0; i < 3; i++ ) { + value = (Sint16)(values[i] * 32767.0f); + SDL_PrivateJoystickAxis(joystick, i, value); + } + } +} + +/* 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) +{ +} + +SDL_JoystickGUID SDL_SYS_JoystickGetDeviceGUID( int device_index ) +{ + SDL_JoystickGUID guid; + // the GUID is just the first 16 chars of the name for now + const char *name = SDL_SYS_JoystickNameForDeviceIndex( device_index ); + SDL_zero( guid ); + SDL_memcpy( &guid, name, SDL_min( sizeof(guid), SDL_strlen( name ) ) ); + return guid; +} + +SDL_JoystickGUID SDL_SYS_JoystickGetGUID(SDL_Joystick * joystick) +{ + SDL_JoystickGUID guid; + // the GUID is just the first 16 chars of the name for now + const char *name = joystick->name; + SDL_zero( guid ); + SDL_memcpy( &guid, name, SDL_min( sizeof(guid), SDL_strlen( name ) ) ); + return guid; +} + +#endif /* SDL_JOYSTICK_ANDROID */ + +/* vi: set ts=4 sw=4 expandtab: */