gdi 截图速度比较慢，如果是要做录屏，远控等，请使用库captrs,因为他是用 DXGI方式截图，所以非常非常快，不过默认不支持xp和win7。
Cargo.toml
[package] name = "demo" version = "0.1.0" edition = "2018" # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html [target.'cfg(windows)'.dependencies] winapi = { version = "0.3", features = ["winuser"] }main.rs
#![feature(raw_ref_macros)] #[cfg(windows)] extern crate winapi; pub unsafe fn serialize_row(src: &T) -> &[u8] { ::std::slice::from_raw_parts((src as *const T) as *const u8, ::std::mem::size_of::()) } // 截屏返回bmp图片数据 fn screen() -> Vec { use std::mem; use winapi::shared::minwindef::LPVOID; use winapi::shared::windef::{HDC, HGDIOBJ, RECT}; use winapi::um::{ wingdi::{ CreateCompatibleBitmap, CreateCompatibleDC, CreateDIBSection, DeleteDC, GetDIBits, GetObjectW, SelectObject, StretchBlt, BITMAPFILEHEADER, BITMAPINFO, BITMAPINFOHEADER, DIB_RGB_COLORS, RGBQUAD, SRCCOPY, }, winnt::HANDLE, winuser::{GetDesktopWindow, GetWindowDC, GetWindowRect}, }; let mut data: Vec = vec![]; unsafe { let hwnd = GetDesktopWindow(); let dc = GetWindowDC(hwnd); let cdc = CreateCompatibleDC(0 as HDC); let mut rect = RECT { left: 0, top: 0, right: 0, bottom: 0, }; GetWindowRect(hwnd, &mut rect); let (w, h) = (rect.right, rect.bottom); let bm = CreateCompatibleBitmap(dc, w, h); SelectObject(cdc, bm as HGDIOBJ); StretchBlt(cdc, 0, 0, w, h, dc, 0, 0, w, h, SRCCOPY); let buf = vec![0u8; (w * h * 4) as usize]; GetObjectW(bm as HANDLE, 84, buf.as_ptr() as LPVOID); let mut bi = BITMAPINFO { bmiHeader: BITMAPINFOHEADER { biBitCount: 32, biWidth: w, biHeight: h, biPlanes: 1, biCompression: 0, biSizeImage: 0, biClrImportant: 0, biClrUsed: 0, biSize: 0, biXPelsPerMeter: 0, biYPelsPerMeter: 0, }, bmiColors: [RGBQUAD { rgbBlue: 0, rgbGreen: 0, rgbRed: 0, rgbReserved: 0, }; 1], }; bi.bmiHeader.biSize = mem::size_of_val(&bi.bmiHeader) as u32; CreateDIBSection( cdc, &bi, DIB_RGB_COLORS, buf.as_ptr() as *mut *mut winapi::ctypes::c_void, 0 as HANDLE, 0, ); GetDIBits( cdc, bm, 0, h as u32, buf.as_ptr() as LPVOID, &mut bi, DIB_RGB_COLORS, ); let bif = BITMAPFILEHEADER { bfType: ('B' as u16) | (('M' as u16)