XCap is a cross-platform screen capture library written in Rust, supporting Linux (X11, Wayland), macOS, Windows, and HarmonyOS (OHOS). It provides a unified API for capturing images of monitors and windows, as well as video recording (currently work-in-progress). The library abstracts platform-specific implementations behind common `Monitor`, `Window`, and `VideoRecorder` structs, using native APIs such as XCB, PipeWire, CoreGraphics, AVFoundation, GDI, Windows Graphics Capture, and OHOS PixelMap. It is well-structured with clean error handling and modular platform modules, though some features like Wayland capture and window recording are still incomplete. The codebase demonstrates solid Rust engineering practices and is actively maintained.