-
Notifications
You must be signed in to change notification settings - Fork 0
/
screen.go
executable file
·40 lines (34 loc) · 867 Bytes
/
screen.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
package gdesktop
import (
"bytes"
"github.com/kbinani/screenshot"
"image/png"
)
type CompLvl int
const (
DefaultCompression = CompLvl(png.DefaultCompression)
NoCompression = CompLvl(png.NoCompression)
BestSpeed = CompLvl(png.BestSpeed)
BestCompression = CompLvl(png.BestCompression)
)
// get display count
func GetActiveScreenCount() int {
return screenshot.NumActiveDisplays()
}
// get screenshot PNG image
// screenIdx is a 0-base index
func ScreenShot(screenIndex int, lvl CompLvl) ([]byte, error) {
bounds := screenshot.GetDisplayBounds(screenIndex)
rgbBuf, err := screenshot.CaptureRect(bounds)
if err != nil {
return nil, err
}
pngBuf := new(bytes.Buffer)
var e png.Encoder
e.CompressionLevel = png.CompressionLevel(lvl)
err = e.Encode(pngBuf, rgbBuf)
if err != nil {
return nil, err
}
return pngBuf.Bytes(), nil
}