Crate gilrs

GilRs - Game Input Library for Rust

GilRs abstract platform specific APIs to provide unified interfaces for working with gamepads.

Main features:

• Unified gamepad layout—buttons and axes are represented by familiar names
• Support for SDL2 mappings including SDL_GAMECONTROLLERCONFIG environment variable which Steam uses
• Hotplugging—GilRs will try to assign new IDs for new gamepads and reuse same ID for gamepads which reconnected
• Force feedback (rumble)
• Power information (is gamepad wired, current battery status)

Example

use gilrs::{Gilrs, Button, Event};

let mut gilrs = Gilrs::new().unwrap();

// Iterate over all connected gamepads
for (_id, gamepad) in gilrs.gamepads() {
    println!("{} is {:?}", gamepad.name(), gamepad.power_info());
}

let mut active_gamepad = None;

loop {
    // Examine new events
    while let Some(Event { id, event, time }) = gilrs.next_event() {
        println!("{:?} New event from {}: {:?}", time, id, event);
        active_gamepad = Some(id);
    }

    // You can also use cached gamepad state
    if let Some(gamepad) = active_gamepad.map(|id| gilrs.gamepad(id)) {
        if gamepad.is_pressed(Button::South) {
            println!("Button South is pressed (XBox - A, PS - X)");
        }
    }
}

Supported features

	Input	Hotplugging	Force feedback
Linux/BSD (evdev)	✓	✓	✓
Windows (XInput)	✓	✓	✓
OS X	✓	✓	✕
Wasm	✓	✓	n/a
Android	✕	✕	✕

Controller layout

original image by nicefrog

Mappings

GilRs use SDL-compatible controller mappings to fix on Linux legacy drivers that doesn’t follow Linux Gamepad API and to provide unified button layout for platforms that doesn’t make any guarantees about it. The main source is SDL_GameControllerDB, but library also support loading mappings from environment variable SDL_GAMECONTROLLERCONFIG (which Steam use).

Cargo features

• serde-serialize - enable deriving of serde’s Serialize and Deserialize for various types.

Platform specific notes

Linux/BSD (evdev)

With evdev, GilRs read (and write, in case of force feedback) directly from appropriate /dev/input/event* file. This mean that user have to have read and write access to this file. On most distros it shouldn’t be a problem, but if it is, you will have to create udev rule. On FreeBSD generic HID gamepads use hgame(4) and special use Linux driver via webcamd.

To build GilRs, you will need pkg-config and libudev .pc file. On some distributions this file is packaged in separate archive (e.g., libudev-dev in Debian, libudev-devd in FreeBSD).

Wasm

Wasm implementation uses stdweb, or wasm-bindgen with the wasm-bindgen feature. For stdweb, you will need cargo-web to build gilrs for wasm32-unknown-unknown. For wasm-bindgen, you will need the wasm-bindgen cli or a tool like wasm-pack. Unlike other platforms, events are only generated when you call Gilrs::next_event().

Re-exports

• pub use crate::ev::filter::Filter;
• pub use crate::ev::Axis;
• pub use crate::ev::Button;
• pub use crate::ev::Event;
• pub use crate::ev::EventType;

Modules

• ev
  Gamepad state and other event related functionality.
• ff
  Force feedback module.

Structs

• ConnectedGamepadsIterator
  Iterator over all connected gamepads.
• Gamepad
  Represents handle to game controller.
• GamepadId
  Gamepad ID.
• Gilrs
  Main object responsible of managing gamepads.
• GilrsBuilder
  Allow to create Gilrs with customized behaviour.
• Mapping
  Stores data used to map gamepad buttons and axes.

Enums

• Error
  Error type which can be returned when creating Gilrs.
• MappingError
  The error type for functions related to gamepad mapping.
• MappingSource
  Source of gamepad mappings.
• PowerInfo
  State of device’s power supply.