mirror of https://github.com/encounter/SDL.git
108 lines
3.8 KiB
C
108 lines
3.8 KiB
C
/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2021 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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#ifndef SDL_syssensor_c_h_
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#define SDL_syssensor_c_h_
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#include "SDL_config.h"
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/* This is the system specific header for the SDL sensor API */
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#include "SDL_sensor.h"
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#include "SDL_sensor_c.h"
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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; /* Device instance, monotonically increasing from 0 */
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char *name; /* Sensor name - system dependent */
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SDL_SensorType type; /* Type of the sensor */
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int non_portable_type; /* Platform dependent type of the sensor */
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float data[16]; /* The current state of the sensor */
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struct _SDL_SensorDriver *driver;
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struct sensor_hwdata *hwdata; /* Driver dependent information */
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int ref_count; /* Reference count for multiple opens */
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struct _SDL_Sensor *next; /* pointer to next sensor we have allocated */
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};
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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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int (*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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int (*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_PrivateSensorUpdate() 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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#endif /* SDL_syssensor_h_ */
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/* vi: set ts=4 sw=4 expandtab: */
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