kr580 1.0.0

Desktop KR580VM80 / Intel 8080 emulator.
Documentation 
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//! Windows window helpers for startup cloaking and rounded corners.

#[cfg(windows)]
pub(crate) fn cloak_window(window: &dyn iced::window::Window, cloaked: bool) {
    use iced::window::raw_window_handle::RawWindowHandle;
    use windows_sys::Win32::Foundation::{BOOL, FALSE, HWND, TRUE};
    use windows_sys::Win32::Graphics::Dwm::{DWMWA_CLOAK, DwmSetWindowAttribute};

    let Ok(handle) = window.window_handle() else {
        return;
    };

    let RawWindowHandle::Win32(win32) = handle.as_raw() else {
        return;
    };

    let hwnd = win32.hwnd.get() as HWND;
    let value: BOOL = if cloaked { TRUE } else { FALSE };

    // SAFETY: HWND comes from winit's live window; the attribute is
    // a POD `BOOL`. Older Windows without DWM cloak silently fail
    // back to the launch flash.
    unsafe {
        let _ = DwmSetWindowAttribute(
            hwnd,
            DWMWA_CLOAK as u32,
            std::ptr::from_ref(&value).cast(),
            std::mem::size_of::<BOOL>() as u32,
        );
    }
}

#[cfg(windows)]
pub(crate) fn set_rounded_corners(window: &dyn iced::window::Window) {
    use iced::window::raw_window_handle::RawWindowHandle;
    use windows_sys::Win32::Foundation::HWND;
    use windows_sys::Win32::Graphics::Dwm::{
        DWM_WINDOW_CORNER_PREFERENCE, DWMWA_WINDOW_CORNER_PREFERENCE, DWMWCP_ROUND,
        DwmSetWindowAttribute,
    };

    let Ok(handle) = window.window_handle() else {
        return;
    };

    let RawWindowHandle::Win32(win32) = handle.as_raw() else {
        return;
    };

    let hwnd = win32.hwnd.get() as HWND;
    let value: DWM_WINDOW_CORNER_PREFERENCE = DWMWCP_ROUND;

    // SAFETY: HWND from winit; attribute is a POD `i32`; pointer is
    // read-only for the call duration.
    unsafe {
        let _ = DwmSetWindowAttribute(
            hwnd,
            DWMWA_WINDOW_CORNER_PREFERENCE as u32,
            std::ptr::from_ref(&value).cast(),
            std::mem::size_of::<DWM_WINDOW_CORNER_PREFERENCE>() as u32,
        );
    }
}

#[cfg(not(windows))]
pub(crate) fn cloak_window(_window: &dyn iced::window::Window, _cloaked: bool) {}

#[cfg(not(windows))]
pub(crate) fn set_rounded_corners(_window: &dyn iced::window::Window) {}

pub(crate) const SUPPORTS_HIDDEN_WINDOW_REUSE: bool = cfg!(windows);