// NewDrawable converts an X drawable into a xgraphics.Image.
// This is used in NewIcccmIcon.
func NewDrawable(X *xgbutil.XUtil, did xproto.Drawable) (*Image, error) {
// Get the geometry of the pixmap for use in the GetImage request.
pgeom, err := xwindow.RawGeometry(X, xproto.Drawable(did))
if err != nil {
return nil, err
}
// Get the image data for each pixmap.
pixmapData, err := xproto.GetImage(X.Conn(), xproto.ImageFormatZPixmap,
did,
0, 0, uint16(pgeom.Width()), uint16(pgeom.Height()),
(1<<32)-1).Reply()
if err != nil {
return nil, err
}
// Now create the xgraphics.Image and populate it with data from
// pixmapData and maskData.
ximg := New(X, image.Rect(0, 0, pgeom.Width(), pgeom.Height()))
// We'll try to be a little flexible with the image format returned,
// but not completely flexible.
err = readDrawableData(X, ximg, did, pixmapData,
pgeom.Width(), pgeom.Height())
if err != nil {
return nil, err
}
return ximg, nil
}
func main() {
// os.Setenv("DISPLAY", "localhost:6080")
c, err := xgb.NewConn()
if err != nil {
fmt.Println(err)
return
}
screen := xproto.Setup(c).DefaultScreen(c)
rect := image.Rect(0, 0, int(screen.WidthInPixels), int(screen.HeightInPixels))
x, y := rect.Dx(), rect.Dy()
xImg, err := xproto.GetImage(c,
xproto.ImageFormatZPixmap,
xproto.Drawable(screen.Root),
int16(rect.Min.X),
int16(rect.Min.Y),
uint16(x),
uint16(y),
0xffffffff).Reply()
if err != nil {
fmt.Println("Error: %s\r\n", err)
}
data := xImg.Data
for i := 0; i < len(data); i += 4 {
data[i], data[i+2], data[i+3] = data[i+2], data[i], 255
}
img := &image.RGBA{
data, 4 * x, image.Rect(0, 0, x, y)}
z.FcheckParents("screen")
f := z.FileW("screen")
defer f.Close()
png := jpeg.Encode(f, img, &jpeg.Options{90})
fmt.Printf("End with png: %v", png)
}
func CaptureRect(rect image.Rectangle) (*image.RGBA, error) {
c, err := xgb.NewConn()
if err != nil {
return nil, err
}
defer c.Close()
screen := xproto.Setup(c).DefaultScreen(c)
x, y := rect.Dx(), rect.Dy()
xImg, err := xproto.GetImage(c, xproto.ImageFormatZPixmap, xproto.Drawable(screen.Root), int16(rect.Min.X), int16(rect.Min.Y), uint16(x), uint16(y), 0xffffffff).Reply()
if err != nil {
return nil, err
}
data := xImg.Data
for i := 0; i < len(data); i += 4 {
data[i], data[i+2], data[i+3] = data[i+2], data[i], 255
}
img := &image.RGBA{data, 4 * x, image.Rect(0, 0, x, y)}
return img, nil
}