initial commit, 4.5 stable

thirdparty/sdl/joystick/linux/SDL_sysjoystick_c.h

@@ -0,0 +1,117 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2025 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.
+*/
+
+#ifndef SDL_sysjoystick_c_h_
+#define SDL_sysjoystick_c_h_
+
+#include <linux/input.h>
+
+struct SDL_joylist_item;
+struct SDL_sensorlist_item;
+
+// The private structure used to keep track of a joystick
+struct joystick_hwdata
+{
+    int fd;
+    // linux driver creates a separate device for gyro/accelerometer
+    int fd_sensor;
+    struct SDL_joylist_item *item;
+    struct SDL_sensorlist_item *item_sensor;
+    SDL_GUID guid;
+    char *fname; // Used in haptic subsystem
+
+    bool ff_rumble;
+    bool ff_sine;
+    struct ff_effect effect;
+    Uint32 effect_expiration;
+
+    // The current Linux joystick driver maps balls to two axes
+    struct hwdata_ball
+    {
+        int axis[2];
+    } *balls;
+
+    // The current Linux joystick driver maps hats to two axes
+    struct hwdata_hat
+    {
+        int axis[2];
+    } *hats;
+
+    // Support for the Linux 2.4 unified input interface
+    Uint8 key_map[KEY_MAX];
+    Uint8 abs_map[ABS_MAX];
+    bool has_key[KEY_MAX];
+    bool has_abs[ABS_MAX];
+    bool has_accelerometer;
+    bool has_gyro;
+
+    // Support for the classic joystick interface
+    bool classic;
+    Uint16 *key_pam;
+    Uint8 *abs_pam;
+
+    struct axis_correct
+    {
+        bool use_deadzones;
+
+        // Deadzone coefficients
+        int coef[3];
+
+        // Raw coordinate scale
+        int minimum;
+        int maximum;
+        float scale;
+    } abs_correct[ABS_MAX];
+
+    float accelerometer_scale[3];
+    float gyro_scale[3];
+
+    /* Each axis is read independently, if we don't get all axis this call to
+     * LINUX_JoystickUpdateupdate(), store them for the next one */
+    float gyro_data[3];
+    float accel_data[3];
+    Uint64 sensor_tick;
+    Sint32 last_tick;
+
+    bool report_sensor;
+    bool fresh;
+    bool recovering_from_dropped;
+    bool recovering_from_dropped_sensor;
+
+    // Steam Controller support
+    bool m_bSteamController;
+
+    // 4 = (ABS_HAT3X-ABS_HAT0X)/2 (see input-event-codes.h in kernel)
+    int hats_indices[4];
+    bool has_hat[4];
+    struct hat_axis_correct
+    {
+        bool use_deadzones;
+        int minimum[2];
+        int maximum[2];
+    } hat_correct[4];
+
+    // Set when gamepad is pending removal due to ENODEV read error
+    bool gone;
+    bool sensor_gone;
+};
+
+#endif // SDL_sysjoystick_c_h_