razerctl

A low-level Rust library for controlling Razer mouse and keyboard input directly through the Razer Synapse driver on Windows.

Features

• ✅ Relative Mouse Movement: Move the mouse cursor by a given x/y offset.
• ✅ Mouse Button Clicks: Simulate press and release events for all standard mouse buttons (Left, Right, Middle, X1, X2).
• ✅ Keyboard Key Presses: Simulate key down and key up events for a comprehensive set of keyboard keys.
• ✅ Safe Abstractions: Provides a safe and simple public API that handles the underlying unsafe Windows API and driver interactions.

How It Works

This library works by locating the symbolic link to the RZCONTROL device created by the Razer Synapse driver and communicating with it directly using DeviceIoControl.

Keyboard input is not sent using standard Windows scan codes. Instead, this crate implements a custom translation layer that converts standard Virtual-Key (VK) codes into the specific MakeCode values the Razer driver expects. This logic was ported from the IbInputSimulator C++ project.

Requirements

• Windows operating system
• Razer Synapse 3 installed
• Rust 1.56 or higher

Installation

1. Add razerctl to your project:

cargo add razerctl

2. (Recommended) Add win_key_codes for easy keyboard control:

For sending keyboard input, you need to provide Windows Virtual-Key codes. The win_key_codes crate provides convenient constants for these codes.

cargo add win_key_codes

Quick Start

Here is a quick example of how to initialize the library, move the mouse, and press the 'A' key.

use std::{io::Error, thread, time::Duration};
use razerctl::{init, mouse_move, key_down, key_up};
use win_key_codes::VK_A; // Use a constant for the 'A' key

fn main() -> Result<(), Error> {
    // 1. Initialize the connection to the Razer driver
    init()?;
    println!("Razer driver initialized.");

    // 2. Move the mouse relatively by (100, 100) pixels
    println!("Moving mouse...");
    mouse_move(100, 100)?;

    // Give a moment for the mouse move to be visible
    thread::sleep(Duration::from_secs(1));

    // 3. Simulate pressing and releasing the 'A' key
    println!("Pressing the 'A' key...");
    key_down(VK_A)?;
    thread::sleep(Duration::from_millis(50)); // Hold the key for 50ms
    key_up(VK_A)?;

    println!("Done!");
    Ok(())
}

Safety

This crate uses unsafe code to interface with the Windows API and the device driver. However, the public API is designed to be a completely safe abstraction over these details. All unsafe blocks are contained internally and have been written with care.

Examples

You can run the included examples from the project root:

# --- Mouse Examples ---
cargo run --example left_click
cargo run --example mouse_move1
cargo run --example mouse_move2

# --- Keyboard Example ---
cargo run --example keyboard_test

Contributing

Contributions are welcome! If you find a bug or have an idea for an improvement, please feel free to submit an issue or a pull request.

License

This project is licensed under the MIT License.