Method new

libs/scrap/src/dxgi/mod.rs:63–172

(display: Display)

impl Capturer {
    pub fn new(display: Display) -> io::Result<Capturer> {
        let mut device = ptr::null_mut();
        let mut context = ptr::null_mut();
        let mut duplication = ptr::null_mut();
        #[allow(invalid_value)]
        let mut desc = unsafe { mem::MaybeUninit::uninit().assume_init() };
        #[allow(invalid_value)]
        let mut adapter_desc1 = unsafe { mem::MaybeUninit::uninit().assume_init() };
        let mut gdi_capturer = None;

        let mut res = if display.gdi {
            wrap_hresult(1)
        } else {
            let res = wrap_hresult(unsafe {
                D3D11CreateDevice(
                    display.adapter.0 as *mut _,
                    D3D_DRIVER_TYPE_UNKNOWN,
                    ptr::null_mut(), // No software rasterizer.
                    0,               // No device flags.
                    ptr::null_mut(), // Feature levels.
                    0,               // Feature levels' length.
                    D3D11_SDK_VERSION,
                    &mut device,
                    ptr::null_mut(),
                    &mut context,
                )
            });
            if res.is_ok() {
                wrap_hresult(unsafe { (*display.adapter.0).GetDesc1(&mut adapter_desc1) })
            } else {
                res
            }
        };
        let device = ComPtr(device);
        let context = ComPtr(context);

        if res.is_err() {
            gdi_capturer = display.create_gdi();
            println!("Fallback to GDI");
            if gdi_capturer.is_some() {
                res = Ok(());
            }
        } else {
            res = wrap_hresult(unsafe {
                let hres = (*display.inner.0).DuplicateOutput(device.0 as *mut _, &mut duplication);
                if hres != S_OK {
                    gdi_capturer = display.create_gdi();
                    println!("Fallback to GDI");
                    if gdi_capturer.is_some() {
                        S_OK
                    } else {
                        hres
                    }
                } else {
                    hres
                }
                // NVFBC(NVIDIA Capture SDK) which xpra used already deprecated, https://developer.nvidia.com/capture-sdk