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godotengine
GitHub Repository: godotengine/godot
 Path: blob/master/thirdparty/sdl/joystick/linux/SDL_sysjoystick_c.h
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/*

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  Simple DirectMedia Layer

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  Copyright (C) 1997-2025 Sam Lantinga <[email protected]>

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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_sysjoystick_c_h_

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#define SDL_sysjoystick_c_h_

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#include <linux/input.h>

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struct SDL_joylist_item;

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struct SDL_sensorlist_item;

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// The private structure used to keep track of a joystick

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struct joystick_hwdata

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{

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    int fd;

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    // linux driver creates a separate device for gyro/accelerometer

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    int fd_sensor;

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    struct SDL_joylist_item *item;

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    struct SDL_sensorlist_item *item_sensor;

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    SDL_GUID guid;

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    char *fname; // Used in haptic subsystem

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    bool ff_rumble;

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    bool ff_sine;

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    struct ff_effect effect;

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    Uint32 effect_expiration;

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    // The current Linux joystick driver maps balls to two axes

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    struct hwdata_ball

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    {

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        int axis[2];

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    } *balls;

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    // The current Linux joystick driver maps hats to two axes

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    struct hwdata_hat

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    {

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        int axis[2];

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    } *hats;

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    // Support for the Linux 2.4 unified input interface

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    Uint8 key_map[KEY_MAX];

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    Uint8 abs_map[ABS_MAX];

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    bool has_key[KEY_MAX];

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    bool has_abs[ABS_MAX];

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    bool has_accelerometer;

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    bool has_gyro;

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    // Support for the classic joystick interface

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    bool classic;

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    Uint16 *key_pam;

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    Uint8 *abs_pam;

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    struct axis_correct

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    {

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        bool use_deadzones;

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        // Deadzone coefficients

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        int coef[3];

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        // Raw coordinate scale

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        int minimum;

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        int maximum;

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        float scale;

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    } abs_correct[ABS_MAX];

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    float accelerometer_scale[3];

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    float gyro_scale[3];

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    /* Each axis is read independently, if we don't get all axis this call to

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     * LINUX_JoystickUpdateupdate(), store them for the next one */

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    float gyro_data[3];

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    float accel_data[3];

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    Uint64 sensor_tick;

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    Sint32 last_tick;

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    bool report_sensor;

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    bool fresh;

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    bool recovering_from_dropped;

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    bool recovering_from_dropped_sensor;

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    // Steam Controller support

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    bool m_bSteamController;

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    // 4 = (ABS_HAT3X-ABS_HAT0X)/2 (see input-event-codes.h in kernel)

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    int hats_indices[4];

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    bool has_hat[4];

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    struct hat_axis_correct

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    {

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        bool use_deadzones;

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        int minimum[2];

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        int maximum[2];

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    } hat_correct[4];

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    // Set when gamepad is pending removal due to ENODEV read error

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    bool gone;

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    bool sensor_gone;

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};

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#endif // SDL_sysjoystick_c_h_

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