mirror of
https://github.com/RetroDECK/Duckstation.git
synced 2024-11-27 08:05:41 +00:00
272 lines
8.2 KiB
C
272 lines
8.2 KiB
C
/*
|
|
Simple DirectMedia Layer
|
|
Copyright (C) 1997-2021 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.
|
|
*/
|
|
|
|
/**
|
|
* \file SDL_sensor.h
|
|
*
|
|
* Include file for SDL sensor event handling
|
|
*
|
|
*/
|
|
|
|
#ifndef SDL_sensor_h_
|
|
#define SDL_sensor_h_
|
|
|
|
#include "SDL_stdinc.h"
|
|
#include "SDL_error.h"
|
|
|
|
#include "begin_code.h"
|
|
/* Set up for C function definitions, even when using C++ */
|
|
#ifdef __cplusplus
|
|
/* *INDENT-OFF* */
|
|
extern "C" {
|
|
/* *INDENT-ON* */
|
|
#endif
|
|
|
|
/**
|
|
* \brief SDL_sensor.h
|
|
*
|
|
* In order to use these functions, SDL_Init() must have been called
|
|
* with the ::SDL_INIT_SENSOR flag. This causes SDL to scan the system
|
|
* for sensors, and load appropriate drivers.
|
|
*/
|
|
|
|
struct _SDL_Sensor;
|
|
typedef struct _SDL_Sensor SDL_Sensor;
|
|
|
|
/**
|
|
* This is a unique ID for a sensor for the time it is connected to the system,
|
|
* and is never reused for the lifetime of the application.
|
|
*
|
|
* The ID value starts at 0 and increments from there. The value -1 is an invalid ID.
|
|
*/
|
|
typedef Sint32 SDL_SensorID;
|
|
|
|
/* The different sensors defined by SDL
|
|
*
|
|
* Additional sensors may be available, using platform dependent semantics.
|
|
*
|
|
* Hare are the additional Android sensors:
|
|
* https://developer.android.com/reference/android/hardware/SensorEvent.html#values
|
|
*/
|
|
typedef enum
|
|
{
|
|
SDL_SENSOR_INVALID = -1, /**< Returned for an invalid sensor */
|
|
SDL_SENSOR_UNKNOWN, /**< Unknown sensor type */
|
|
SDL_SENSOR_ACCEL, /**< Accelerometer */
|
|
SDL_SENSOR_GYRO /**< Gyroscope */
|
|
} SDL_SensorType;
|
|
|
|
/**
|
|
* Accelerometer sensor
|
|
*
|
|
* The accelerometer returns the current acceleration in SI meters per
|
|
* second squared. This measurement includes the force of gravity, so
|
|
* a device at rest will have an value of SDL_STANDARD_GRAVITY away
|
|
* from the center of the earth.
|
|
*
|
|
* values[0]: Acceleration on the x axis
|
|
* values[1]: Acceleration on the y axis
|
|
* values[2]: Acceleration on the z axis
|
|
*
|
|
* For phones held in portrait mode and game controllers held in front of you,
|
|
* the axes are defined as follows:
|
|
* -X ... +X : left ... right
|
|
* -Y ... +Y : bottom ... top
|
|
* -Z ... +Z : farther ... closer
|
|
*
|
|
* The axis data is not changed when the phone is rotated.
|
|
*
|
|
* \sa SDL_GetDisplayOrientation()
|
|
*/
|
|
#define SDL_STANDARD_GRAVITY 9.80665f
|
|
|
|
/**
|
|
* Gyroscope sensor
|
|
*
|
|
* The gyroscope returns the current rate of rotation in radians per second.
|
|
* The rotation is positive in the counter-clockwise direction. That is,
|
|
* an observer looking from a positive location on one of the axes would
|
|
* see positive rotation on that axis when it appeared to be rotating
|
|
* counter-clockwise.
|
|
*
|
|
* values[0]: Angular speed around the x axis (pitch)
|
|
* values[1]: Angular speed around the y axis (yaw)
|
|
* values[2]: Angular speed around the z axis (roll)
|
|
*
|
|
* For phones held in portrait mode and game controllers held in front of you,
|
|
* the axes are defined as follows:
|
|
* -X ... +X : left ... right
|
|
* -Y ... +Y : bottom ... top
|
|
* -Z ... +Z : farther ... closer
|
|
*
|
|
* The axis data is not changed when the phone or controller is rotated.
|
|
*
|
|
* \sa SDL_GetDisplayOrientation()
|
|
*/
|
|
|
|
/* Function prototypes */
|
|
|
|
/**
|
|
* Locking for multi-threaded access to the sensor API
|
|
*
|
|
* If you are using the sensor API or handling events from multiple threads
|
|
* you should use these locking functions to protect access to the sensors.
|
|
*
|
|
* In particular, you are guaranteed that the sensor list won't change, so the
|
|
* API functions that take a sensor index will be valid, and sensor events
|
|
* will not be delivered.
|
|
*/
|
|
extern DECLSPEC void SDLCALL SDL_LockSensors(void);
|
|
extern DECLSPEC void SDLCALL SDL_UnlockSensors(void);
|
|
|
|
/**
|
|
* Count the number of sensors attached to the system right now.
|
|
*
|
|
* \returns the number of sensors detected.
|
|
*/
|
|
extern DECLSPEC int SDLCALL SDL_NumSensors(void);
|
|
|
|
/**
|
|
* Get the implementation dependent name of a sensor.
|
|
*
|
|
* \param device_index The sensor to obtain name from
|
|
* \returns the sensor name, or NULL if `device_index` is out of range.
|
|
*/
|
|
extern DECLSPEC const char *SDLCALL SDL_SensorGetDeviceName(int device_index);
|
|
|
|
/**
|
|
* Get the type of a sensor.
|
|
*
|
|
* \param device_index The sensor to get the type from
|
|
* \returns the SDL_SensorType, or `SDL_SENSOR_INVALID` if `device_index` is
|
|
* out of range.
|
|
*/
|
|
extern DECLSPEC SDL_SensorType SDLCALL SDL_SensorGetDeviceType(int device_index);
|
|
|
|
/**
|
|
* Get the platform dependent type of a sensor.
|
|
*
|
|
* \param device_index The sensor to check
|
|
* \returns the sensor platform dependent type, or -1 if `device_index` is out
|
|
* of range.
|
|
*/
|
|
extern DECLSPEC int SDLCALL SDL_SensorGetDeviceNonPortableType(int device_index);
|
|
|
|
/**
|
|
* Get the instance ID of a sensor.
|
|
*
|
|
* \param device_index The sensor to get instance id from
|
|
* \returns the sensor instance ID, or -1 if `device_index` is out of range.
|
|
*/
|
|
extern DECLSPEC SDL_SensorID SDLCALL SDL_SensorGetDeviceInstanceID(int device_index);
|
|
|
|
/**
|
|
* Open a sensor for use.
|
|
*
|
|
* \param device_index The sensor to open
|
|
* \returns an SDL_Sensor sensor object, or NULL if an error occurred.
|
|
*/
|
|
extern DECLSPEC SDL_Sensor *SDLCALL SDL_SensorOpen(int device_index);
|
|
|
|
/**
|
|
* Return the SDL_Sensor associated with an instance id.
|
|
*
|
|
* \param instance_id The sensor from instance id
|
|
* \returns an SDL_Sensor object.
|
|
*/
|
|
extern DECLSPEC SDL_Sensor *SDLCALL SDL_SensorFromInstanceID(SDL_SensorID instance_id);
|
|
|
|
/**
|
|
* Get the implementation dependent name of a sensor
|
|
*
|
|
* \param sensor The SDL_Sensor object
|
|
* \returns the sensor name, or NULL if `sensor` is NULL.
|
|
*/
|
|
extern DECLSPEC const char *SDLCALL SDL_SensorGetName(SDL_Sensor *sensor);
|
|
|
|
/**
|
|
* Get the type of a sensor.
|
|
*
|
|
* \param sensor The SDL_Sensor object to inspect
|
|
* \returns the SDL_SensorType type, or `SDL_SENSOR_INVALID` if `sensor` is
|
|
* NULL.
|
|
*/
|
|
extern DECLSPEC SDL_SensorType SDLCALL SDL_SensorGetType(SDL_Sensor *sensor);
|
|
|
|
/**
|
|
* Get the platform dependent type of a sensor.
|
|
*
|
|
* \param sensor The SDL_Sensor object to inspect
|
|
* \returns the sensor platform dependent type, or -1 if `sensor` is NULL.
|
|
*/
|
|
extern DECLSPEC int SDLCALL SDL_SensorGetNonPortableType(SDL_Sensor *sensor);
|
|
|
|
/**
|
|
* Get the instance ID of a sensor.
|
|
*
|
|
* \param sensor The SDL_Sensor object to inspect
|
|
* \returns the sensor instance ID, or -1 if `sensor` is NULL.
|
|
*/
|
|
extern DECLSPEC SDL_SensorID SDLCALL SDL_SensorGetInstanceID(SDL_Sensor *sensor);
|
|
|
|
/**
|
|
* Get the current state of an opened sensor.
|
|
*
|
|
* The number of values and interpretation of the data is sensor dependent.
|
|
*
|
|
* \param sensor The SDL_Sensor object to query
|
|
* \param data A pointer filled with the current sensor state
|
|
* \param num_values The number of values to write to data
|
|
* \returns 0 or -1 if an error occurred.
|
|
*/
|
|
extern DECLSPEC int SDLCALL SDL_SensorGetData(SDL_Sensor * sensor, float *data, int num_values);
|
|
|
|
/**
|
|
* Close a sensor previously opened with SDL_SensorOpen().
|
|
*
|
|
* \param sensor The SDL_Sensor object to close
|
|
*/
|
|
extern DECLSPEC void SDLCALL SDL_SensorClose(SDL_Sensor * sensor);
|
|
|
|
/**
|
|
* Update the current state of the open sensors.
|
|
*
|
|
* This is called automatically by the event loop if sensor events are
|
|
* enabled.
|
|
*
|
|
* This needs to be called from the thread that initialized the sensor
|
|
* subsystem.
|
|
*/
|
|
extern DECLSPEC void SDLCALL SDL_SensorUpdate(void);
|
|
|
|
|
|
/* Ends C function definitions when using C++ */
|
|
#ifdef __cplusplus
|
|
/* *INDENT-OFF* */
|
|
}
|
|
/* *INDENT-ON* */
|
|
#endif
|
|
#include "close_code.h"
|
|
|
|
#endif /* SDL_sensor_h_ */
|
|
|
|
/* vi: set ts=4 sw=4 expandtab: */
|