--- /dev/null
+/*
+ Simple DirectMedia Layer
+ Copyright (C) 1997-2022 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.
+ *
+ * \since This function is available since SDL 2.0.14.
+ */
+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.
+ *
+ * \since This function is available since SDL 2.0.9.
+ */
+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.
+ *
+ * \since This function is available since SDL 2.0.9.
+ */
+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.
+ *
+ * \since This function is available since SDL 2.0.9.
+ */
+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.
+ *
+ * \since This function is available since SDL 2.0.9.
+ */
+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.
+ *
+ * \since This function is available since SDL 2.0.9.
+ */
+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.
+ *
+ * \since This function is available since SDL 2.0.9.
+ */
+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.
+ *
+ * \since This function is available since SDL 2.0.9.
+ */
+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.
+ *
+ * \since This function is available since SDL 2.0.9.
+ */
+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.
+ *
+ * \since This function is available since SDL 2.0.9.
+ */
+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.
+ *
+ * \since This function is available since SDL 2.0.9.
+ */
+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.
+ *
+ * \since This function is available since SDL 2.0.9.
+ */
+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.
+ *
+ * \since This function is available since SDL 2.0.9.
+ */
+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
+ *
+ * \since This function is available since SDL 2.0.9.
+ */
+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.
+ *
+ * \since This function is available since SDL 2.0.9.
+ */
+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: */
projects / xonotic / darkplaces.git / blobdiff