| /* |
| Simple DirectMedia Layer |
| Copyright (C) 1997-2013 Sam Lantinga <slouken@libsdl.org> |
| |
| 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 <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" |
| #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: */ |