Screenshot

• Go library to capture desktop screen.
• Multiple display supported.
• Supported GOOS: windows, darwin, linux, freebsd, openbsd, and netbsd.
• cgo free except for GOOS=darwin.

Example

• sample program main.go

   package main
  
   import (
   	"github.com/kbinani/screenshot"
   	"image/png"
   	"os"
   	"fmt"
   )
  
   func main() {
   	n := screenshot.NumActiveDisplays()
  
   	for i := 0; i < n; i++ {
   		bounds := screenshot.GetDisplayBounds(i)
  
   		img, err := screenshot.CaptureRect(bounds)
   		if err != nil {
   			panic(err)
   		}
   		fileName := fmt.Sprintf("%d_%dx%d.png", i, bounds.Dx(), bounds.Dy())
   		file, _ := os.Create(fileName)
   		defer file.Close()
   		png.Encode(file, img)
  
   		fmt.Printf("#%d : %v \"%s\"\n", i, bounds, fileName)
   	}
   }

• output example

   $ go run main.go
   #0 : (0,0)-(1280,800) "0_1280x800.png"
   #1 : (-293,-1440)-(2267,0) "1_2560x1440.png"
   #2 : (-1373,-1812)-(-293,108) "2_1080x1920.png"
   $ ls -1
   0_1280x800.png
   1_2560x1440.png
   2_1080x1920.png
   main.go

List of Functions

• windows.go ( Depends on https://github.com/lxn/win A Windows API wrapper)

NumActiveDisplays()

GetDisplayBounds()

getDesktopWindow()

enumDisplayMonitors()

countupMonitorCallback()

getMonitorBoundsCallback()

getMonitorRealSize()

• screenshot.go

CaptureDisplay()

CaptureRect()

createImage()

Coordinate System

The coordinate system is similar to Windows OS in that the he origin of Y-axis coordinate is upper-left corner of main display, in a downward direction.

License

MIT Licence

Author

kbinani