Ejemplo n.º 1
0
// 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
}
Ejemplo n.º 2
0
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)
}
Ejemplo n.º 3
0
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
}