🚀 NVIDIA Overlay Hijacker in Rust

This project is a robust and efficient implementation of NVIDIA Overlay Hijacker using Rust and WinAPI. It leverages Rust's powerful safety features to ensure a high degree of modularity, security, and speed. The codebase is well-structured, allowing for ease of modification and extensibility.

🎯 Features

• 🛡️ Built with Rust's standard safety features
• 🚀 Highly modular and efficient
• 🎨 Basic drawing functions: draw_text and draw_rect
• 📦 Helper functions: create_brush, create_text_layout, draw_element, create_brush_properties, color_u8_to_f32

🏗️ Project Structure

.
├── examples
│   └── basic.rs   // A simple usage example
└── src
    ├── core.rs   // Contains the Overlay struct and OverlayError enum
    ├── overlay_helper.rs   // Contains the OverlayHelper trait and its implementation
    └── lib.rs   // Contains the main functions, Drop implementation and drawing functions

🎨 Extensibility

New drawing functions can be easily implemented using the draw_element function provided by OverlayHelper. This function provides all the necessary resources, specific properties and differents drawing logic can be defined within the function scope or inside the draw_element function if necessary.
Here is an example with the draw_rect function:

pub fn draw_rect(&mut self, (x, y): (f32, f32), (width, height): (f32, f32), stroke_width: f32, color: (u8, u8, u8, u8)) {
        let draw_rect = D2D1_RECT_F {
            left: x,
            top: y,
            right: x + width,
            bottom: y + height,
        };
        self.draw_element(color, |tar, brush| {
            unsafe { (*tar).DrawRectangle(&draw_rect, brush, stroke_width, std::ptr::null_mut()) };
        });
    }
}

💻 Usage

You can find a simple usage example below:

use std::time::{Duration, Instant};
use nvidia_overlay_hijack::core::Overlay;

fn main() {
    let mut overlay = Overlay::new("Consolas", 18.0);

    // call init
    let init = overlay.init();
    if init.is_err() {
        println!("init failed");
    } else {
        println!("init success");
    }

    // call startup_d2d
    let startup_d2d = overlay.startup_d2d();
    if startup_d2d.is_err() {
        println!("startup_d2d failed");
    } else {
        println!("startup_d2d success");
    }

    println!("Successfully initialized, rendering for 10 seconds now..\n");

    // Show the overlay for 10 seconds
    let start = Instant::now();
    while start.elapsed() < Duration::from_secs(10) {
        overlay.begin_scene();
        overlay.clear_scene();
        overlay.draw_text(
            (10.0, 30.0),
            "github.com/WilgnerFSDev/nvidia-overlay-hijack-rs".to_string(),
            (255, 51, 0, 255),
        );
        overlay.draw_rect((10.0, 80.0), (100.0, 100.0), 2.0, (255, 51, 0, 255));
        overlay.end_scene();
    }

    println!("Done!");
}

🛠️ Contribution

This project is open for improvements and maintenance.
Note that further implementations like as draw_text or draw_rect will not be added to the project by me. I left as an exercise to you =).
The project provides ample resources and structures for you to create your own implementations.

🙏 Acknowledgements

Thanks to iraizo/nvidia-overlay-hijack for being the inspiration for this Rust implementation.

📝 License

This project is licensed under the MIT License - see the LICENSE.md file for details.