neser 0.1.1

NESER - NES Emulator in Rust - is a NES emulator written in Rust. It aims to be a high-quality, hardware-accurate emulator that is also easy to use and extend. It supports a wide range of NES games and features, including various mappers, audio processing, and input handling. NESER is designed to be modular and extensible, allowing developers to easily add new features or support for additional hardware. It can be run using one of two frontends: a native desktop application using SDL2, or a web application using WebAssembly. The desktop application provides a high-performance, feature-rich experience with support for various input devices and display options, while the web application allows users to play NES games directly in their browsers without needing to install any software in a BYOR manner (Bring Your Own Roms).
Documentation 
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use crate::rendering::RenderTarget;

use sdl2::video::{FullscreenType, GLContext, Window};

/// SDL-backed render target that exposes window/GL context operations
/// to the renderer without leaking SDL types into the rendering module.
pub struct SdlRenderTarget {
    pub window: Window,
    pub gl_context: GLContext,
}

impl RenderTarget for SdlRenderTarget {
    /// Returns the logical window size in pixels.
    fn window_size(&self) -> (u32, u32) {
        self.window.size()
    }

    /// Returns the drawable framebuffer size in pixels (HiDPI aware).
    fn drawable_size(&self) -> (u32, u32) {
        self.window.drawable_size()
    }

    /// Swaps the OpenGL buffers to present the frame.
    fn swap_buffers(&self) {
        self.window.gl_swap_window();
    }

    /// Makes the SDL OpenGL context current.
    fn make_current(&self) -> Result<(), String> {
        self.window
            .gl_make_current(&self.gl_context)
            .map_err(|e| e.to_string())
    }

    /// Enables or disables fullscreen mode for the SDL window.
    fn set_fullscreen(&mut self, enabled: bool) -> Result<(), String> {
        let mode = if enabled {
            FullscreenType::Desktop
        } else {
            FullscreenType::Off
        };
        self.window.set_fullscreen(mode).map_err(|e| e.to_string())
    }

    fn set_mouse_grab(&mut self, enabled: bool) -> Result<(), String> {
        self.window.set_grab(enabled);
        Ok(())
    }
}