Windows 桌面复制

此库旨在为游戏流（例如 Google Stadia、Microsoft XCloud）等应用程序提供低延迟、低级别的桌面帧访问。

提供从 Windows 桌面复制 API 获取 GPU 纹理的方便包装器。该库包括一些源 API 没有提供的有用功能

异步示例

尽管此示例展示了使用 TextureReader，但为了最佳性能，您想直接使用纹理通过硬件编码器（如 nvenc 或 quick-sync）进行编码。

use win_desktop_duplication::*;
use win_desktop_duplication::{tex_reader::*, devices::*};

#[tokio::main(flavor = "current_thread")]
async fn main() {
    // this is required to be able to use desktop duplication api
    set_process_dpi_awareness();
    co_init();


    // select gpu and output you want to use.
    let adapter = AdapterFactory::new().get_adapter_by_idx(0).unwrap();
    let output = adapter.get_display_by_idx(0).unwrap();


    // get output duplication api
    let mut dupl = DesktopDuplicationApi::new(adapter, output).unwrap();

    // Optional: get TextureReader to read GPU textures into CPU.
    let (device, ctx) = dupl.get_device_and_ctx();
    let mut texture_reader = TextureReader::new(device, ctx);


    // create a vector to hold picture data;
    let mut pic_data: Vec<u8> = vec![0; 0];
    loop {
        // this api send one frame per vsync. the frame also has cursor pre drawn
        let tex = dupl.acquire_next_vsync_frame().await;
        if let Ok(tex) = tex {
            texture_reader.get_data(&mut pic_data, &tex);
            // use pic_data as necessary
        }
    }
}

同步示例

尽管此示例展示了使用 TextureReader，但为了最佳性能，您想直接使用纹理通过硬件编码器（如 nvenc 或 quick-sync）进行编码。

use win_desktop_duplication::*;
use win_desktop_duplication::{tex_reader::*, devices::*};

fn main() {
    // this is required to be able to use desktop duplication api
    set_process_dpi_awareness();
    co_init();

    // select gpu and output you want to use.
    let adapter = AdapterFactory::new().get_adapter_by_idx(0).unwrap();
    let output = adapter.get_display_by_idx(0).unwrap();

    // get output duplication api
    let mut dupl = DesktopDuplicationApi::new(adapter, output.clone()).unwrap();

    // Optional: get TextureReader to read GPU textures into CPU.
    let (device, ctx) = dupl.get_device_and_ctx();
    let mut texture_reader = TextureReader::new(device, ctx);


    // create a vector to hold picture data;
    let mut pic_data: Vec<u8> = vec![0; 0];
    loop {
        // this api send one frame per vsync. the frame also has cursor pre drawn
        output.wait_for_vsync().unwrap();
        let tex = dupl.acquire_next_frame_now();

        if let Ok(tex) = tex {
            texture_reader.get_data(&mut pic_data, &tex);
            // use pic_data as necessary
        }
    }
}

功能

• 提供帧时 VSync
• 自动将光标绘制到帧上
• 自动处理桌面切换
• 方便的函数以在 CPU 内存中复制像素数据
• 缩放和颜色转换（查看 dxfilter-rs）。