我的第一個 SO 問題 :-) 我希望通過調(diào)用 Windows 機(jī)器上的 User32.dll 和 GDI32.dll（項目要求）從 Golang 截取屏幕截圖。我有一個包含屏幕截圖像素的位圖的句柄。但是，我不知道如何訪問其數(shù)據(jù)或如何將其保存到磁盤。任何人都知道如何將 GDI 位圖映射到 Golang []byte 然后另存為 JPG 或 PNG？package mainimport "syscall"var ( user32 = syscall.NewLazyDLL("user32.dll") procGetClientRect = user32.NewProc("GetClientRect") // etc... gdi32 = syscall.NewLazyDLL("gdi32.dll") procCreateDC = gdi32.NewProc("CreateDC") SRCCOPY uint = 13369376 //etc...)//// omitted for brevity//func TakeDesktopScreenshotViaWinAPI() { // these are all calls to user32.dll or gdi32.dll hDesktop := GetDesktopWindow() desktopRect := GetClientRect(hDesktop) width := int(desktopRect.Right - desktopRect.Left) height := int(desktopRect.Bottom - desktopRect.Top) // create device contexts srcDC := GetDC(hDesktop) targetDC := CreateCompatibleDC(srcDC) // create bitmap to copy to hBitmap := CreateCompatibleBitmap(targetDC, width, height) // select the bitmap into target DC hOldSelection := SelectObject(targetDC, HGDIOBJ(hBitmap)) //bit block transfer from src to target BitBlt(targetDC, 0, 0, width, height, srcDC, 0, 0, SRCCOPY) // how to save the the data in // *hBitmap ??? // restore selection SelectObject(targetDC, hOldSelection) // clean up DeleteDC(HDC(targetDC)) ReleaseDC(hDesktop, srcDC) DeleteObject(HGDIOBJ(hBitmap))}
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TA貢獻(xiàn)1803條經(jīng)驗 獲得超3個贊
您可以使用vova616的屏幕截圖庫，或者查看screenshot_windows.go以了解所需的轉(zhuǎn)換方法。
根據(jù)提供的示例：
package main
import (
"github.com/vova616/screenshot"
"image/png"
"os"
)
func main() {
img, err := screenshot.CaptureScreen()
if err != nil {
panic(err)
}
f, err := os.Create("./ss.png")
if err != nil {
panic(err)
}
err = png.Encode(f, img)
if err != nil {
panic(err)
}
f.Close()
}
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