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/* | ||
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. | ||
*/ | ||
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#include "SDL_config.h" | ||
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#ifdef SDL_JOYSTICK_ANDROID | ||
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/* This is the system specific header for the SDL joystick API */ | ||
#include <stdio.h> /* For the definition of NULL */ | ||
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#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" | ||
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static const char *accelerometerName = "Android accelerometer"; | ||
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/* 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); | ||
} | ||
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int SDL_SYS_NumJoysticks() | ||
{ | ||
return 1; | ||
} | ||
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void SDL_SYS_JoystickDetect() | ||
{ | ||
} | ||
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SDL_bool SDL_SYS_JoystickNeedsPolling() | ||
{ | ||
return SDL_FALSE; | ||
} | ||
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/* Function to get the device-dependent name of a joystick */ | ||
const char * | ||
SDL_SYS_JoystickNameForDeviceIndex(int device_index) | ||
{ | ||
return accelerometerName; | ||
} | ||
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/* 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; | ||
} | ||
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/* 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); | ||
} | ||
} | ||
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/* Function to determine is this joystick is attached to the system right now */ | ||
SDL_bool SDL_SYS_JoystickAttached(SDL_Joystick *joystick) | ||
{ | ||
return SDL_TRUE; | ||
} | ||
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/* 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]; | ||
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if (Android_JNI_GetAccelerometerValues(values)) { | ||
for ( i = 0; i < 3; i++ ) { | ||
value = (Sint16)(values[i] * 32767.0f); | ||
SDL_PrivateJoystickAxis(joystick, i, value); | ||
} | ||
} | ||
} | ||
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/* Function to close a joystick after use */ | ||
void | ||
SDL_SYS_JoystickClose(SDL_Joystick * joystick) | ||
{ | ||
} | ||
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/* Function to perform any system-specific joystick related cleanup */ | ||
void | ||
SDL_SYS_JoystickQuit(void) | ||
{ | ||
} | ||
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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; | ||
} | ||
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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; | ||
} | ||
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#endif /* SDL_JOYSTICK_ANDROID */ | ||
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/* vi: set ts=4 sw=4 expandtab: */ |