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111 lines
3.8 KiB
C++
111 lines
3.8 KiB
C++
/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2025 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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#include "SDL_internal.h"
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#ifndef SDL_syssensor_c_h_
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#define SDL_syssensor_c_h_
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// This is the system specific header for the SDL sensor API
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#include "SDL_sensor_c.h"
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#define _guarded SDL_GUARDED_BY(SDL_sensor_lock)
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// The SDL sensor structure
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struct SDL_Sensor
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{
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SDL_SensorID instance_id _guarded; // Device instance, monotonically increasing from 0
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char *name _guarded; // Sensor name - system dependent
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SDL_SensorType type _guarded; // Type of the sensor
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int non_portable_type _guarded; // Platform dependent type of the sensor
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float data[16] _guarded; // The current state of the sensor
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struct SDL_SensorDriver *driver _guarded;
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struct sensor_hwdata *hwdata _guarded; // Driver dependent information
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SDL_PropertiesID props _guarded;
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int ref_count _guarded; // Reference count for multiple opens
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struct SDL_Sensor *next _guarded; // pointer to next sensor we have allocated
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};
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#undef _guarded
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typedef struct SDL_SensorDriver
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{
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/* Function to scan the system for sensors.
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* sensor 0 should be the system default sensor.
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* This function should return 0, or -1 on an unrecoverable fatal error.
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*/
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bool (*Init)(void);
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// Function to return the number of sensors available right now
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int (*GetCount)(void);
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// Function to check to see if the available sensors have changed
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void (*Detect)(void);
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// Function to get the device-dependent name of a sensor
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const char *(*GetDeviceName)(int device_index);
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// Function to get the type of a sensor
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SDL_SensorType (*GetDeviceType)(int device_index);
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// Function to get the platform dependent type of a sensor
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int (*GetDeviceNonPortableType)(int device_index);
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// Function to get the current instance id of the sensor located at device_index
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SDL_SensorID (*GetDeviceInstanceID)(int device_index);
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/* Function to open a sensor for use.
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The sensor to open is specified by the device index.
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It returns 0, or -1 if there is an error.
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*/
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bool (*Open)(SDL_Sensor *sensor, int device_index);
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/* Function to update the state of a sensor - called as a device poll.
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* This function shouldn't update the sensor structure directly,
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* but instead should call SDL_SendSensorUpdate() to deliver events
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* and update sensor device state.
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*/
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void (*Update)(SDL_Sensor *sensor);
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// Function to close a sensor after use
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void (*Close)(SDL_Sensor *sensor);
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// Function to perform any system-specific sensor related cleanup
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void (*Quit)(void);
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} SDL_SensorDriver;
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// The available sensor drivers
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extern SDL_SensorDriver SDL_ANDROID_SensorDriver;
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extern SDL_SensorDriver SDL_COREMOTION_SensorDriver;
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extern SDL_SensorDriver SDL_WINDOWS_SensorDriver;
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extern SDL_SensorDriver SDL_DUMMY_SensorDriver;
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extern SDL_SensorDriver SDL_VITA_SensorDriver;
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extern SDL_SensorDriver SDL_N3DS_SensorDriver;
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#endif // SDL_syssensor_h_
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