func newHeads(X *xgb.Conn) heads {
var primaryHead *head
var primaryOutput randr.Output
root := xproto.Setup(X).DefaultScreen(X).Root
resources, err := randr.GetScreenResourcesCurrent(X, root).Reply()
if err != nil {
log.Fatalf("Could not get screen resources: %s.", err)
}
primaryOutputReply, _ := randr.GetOutputPrimary(X, root).Reply()
if primaryOutputReply != nil {
primaryOutput = primaryOutputReply.Output
}
hds := make([]head, 0, len(resources.Outputs))
off := make([]string, 0)
disconnected := make([]string, 0)
for i, output := range resources.Outputs {
oinfo, err := randr.GetOutputInfo(X, output, 0).Reply()
if err != nil {
log.Fatalf("Could not get output info for screen %d: %s.", i, err)
}
outputName := string(oinfo.Name)
if oinfo.Connection != randr.ConnectionConnected {
disconnected = append(disconnected, outputName)
continue
}
if oinfo.Crtc == 0 {
off = append(off, outputName)
continue
}
crtcinfo, err := randr.GetCrtcInfo(X, oinfo.Crtc, 0).Reply()
if err != nil {
log.Fatalf("Could not get crtc info for screen (%d, %s): %s.",
i, outputName, err)
}
head := newHead(output, outputName, crtcinfo)
if output == primaryOutput {
primaryHead = &head
}
hds = append(hds, head)
}
if primaryHead == nil && len(hds) > 0 {
tmp := hds[0]
primaryHead = &tmp
}
hdsPrim := heads{
primary: primaryHead,
heads: hds,
off: off,
disconnected: disconnected,
}
sort.Sort(hdsPrim)
return hdsPrim
}
func getPrimaryScreenBestResolution() (w uint16, h uint16) {
// if connect to x failed, just return 1024x768
w, h = 1024, 768
XU, err := xgbutil.NewConn()
if err != nil {
return
}
err = randr.Init(XU.Conn())
if err != nil {
return
}
_, err = randr.QueryVersion(XU.Conn(), 1, 4).Reply()
if err != nil {
return
}
Root := xproto.Setup(XU.Conn()).DefaultScreen(XU.Conn()).Root
resources, err := randr.GetScreenResources(XU.Conn(), Root).Reply()
if err != nil {
return
}
bestModes := make([]uint32, 0)
for _, output := range resources.Outputs {
reply, err := randr.GetOutputInfo(XU.Conn(), output, 0).Reply()
if err == nil && reply.NumModes > 1 {
bestModes = append(bestModes, uint32(reply.Modes[0]))
}
}
w, h = 0, 0
for _, m := range resources.Modes {
for _, id := range bestModes {
if id == m.Id {
bw, bh := m.Width, m.Height
if w == 0 || h == 0 {
w, h = bw, bh
} else if uint32(bw)*uint32(bh) < uint32(w)*uint32(h) {
w, h = bw, bh
}
}
}
}
if w == 0 || h == 0 {
// get resource failed, use root window's geometry
rootRect := xwindow.RootGeometry(XU)
w, h = uint16(rootRect.Width()), uint16(rootRect.Height())
}
if w == 0 || h == 0 {
w, h = 1024, 768 // default value
}
logger.Debugf("primary screen's best resolution is %dx%d", w, h)
return
}
func GetOutputs(X *xgbutil.XUtil) (outputs []*randr.GetOutputInfoReply) {
resources, err := randr.GetScreenResources(X.Conn(), X.RootWin()).Reply()
if err != nil {
return nil
}
for _, output := range resources.Outputs {
oinfo, err := randr.GetOutputInfo(X.Conn(), output, 0).Reply()
if err != nil {
return nil
}
outputs = append(outputs, oinfo)
}
return outputs
}
// GetOutputByName fetches an output by name.
// FIXME: It's really ugly to just throw away the OutputInfo after using it. See
// if there's a better way to do this.
func GetOutputByName(X *xgbutil.XUtil, name string) (randr.Output, error) {
res, err := randr.GetScreenResources(X.Conn(), X.RootWin()).Reply()
if err != nil {
return 0, err
}
var (
oinfo *randr.GetOutputInfoReply
output randr.Output
)
for _, output = range res.Outputs {
oinfo, err = randr.GetOutputInfo(X.Conn(), output, 0).Reply()
if err != nil {
return 0, err
}
// See if we've found the correct output.
if string(oinfo.Name) == name {
break
}
}
return output, nil
}
// OutputRect creates a Rectangle fitting the active CRTC of the given output.
// Returns the Zero Rectangle and an error if anything goes wrong. If the output
// is disabled, the ZR will be returned.
func OutputRect(X *xgbutil.XUtil, output randr.Output) (image.Rectangle, error) {
oinfo, err := randr.GetOutputInfo(X.Conn(), output, 0).Reply()
if err != nil {
return image.ZR, err
}
if oinfo.Crtc == 0 {
// this output is disabled
return image.ZR, nil
}
crtc, err := randr.GetCrtcInfo(X.Conn(), oinfo.Crtc, 0).Reply()
if err != nil {
return image.ZR, err
}
x, y := int(crtc.X), int(crtc.Y)
w, h := int(crtc.Width), int(crtc.Height)
return image.Rectangle{
image.Point{x, y},
image.Point{x + w, y + h},
}, nil
}
func main() {
X, _ := xgb.NewConn()
// Every extension must be initialized before it can be used.
err := randr.Init(X)
if err != nil {
log.Fatal(err)
}
// Get the root window on the default screen.
root := xproto.Setup(X).DefaultScreen(X).Root
// Gets the current screen resources. Screen resources contains a list
// of names, crtcs, outputs and modes, among other things.
resources, err := randr.GetScreenResources(X, root).Reply()
if err != nil {
log.Fatal(err)
}
// Iterate through all of the outputs and show some of their info.
for _, output := range resources.Outputs {
info, err := randr.GetOutputInfo(X, output, 0).Reply()
if err != nil {
log.Fatal(err)
}
bestMode := info.Modes[0]
for _, mode := range resources.Modes {
if mode.Id == uint32(bestMode) {
fmt.Printf("Width: %d, Height: %d\n", mode.Width, mode.Height)
}
}
}
fmt.Println("\n")
// Iterate through all of the crtcs and show some of their info.
for _, crtc := range resources.Crtcs {
info, err := randr.GetCrtcInfo(X, crtc, 0).Reply()
if err != nil {
log.Fatal(err)
}
fmt.Printf("X: %d, Y: %d, Width: %d, Height: %d\n",
info.X, info.Y, info.Width, info.Height)
}
// Tell RandR to send us events. (I think these are all of them, as of 1.3.)
err = randr.SelectInputChecked(X, root,
randr.NotifyMaskScreenChange|
randr.NotifyMaskCrtcChange|
randr.NotifyMaskOutputChange|
randr.NotifyMaskOutputProperty).Check()
if err != nil {
log.Fatal(err)
}
// Listen to events and just dump them to standard out.
// A more involved approach will have to read the 'U' field of
// RandrNotifyEvent, which is a union (really a struct) of type
// RanrNotifyDataUnion.
for {
ev, err := X.WaitForEvent()
if err != nil {
log.Fatal(err)
}
fmt.Println(ev)
}
}
func (ms Monitors) Update(e *Euclid, x XHandle, mergeOverlapping, removeUnplugged, removeDisabled bool) bool {
c := x.Conn()
sres, err := randr.GetScreenResources(c, x.Root()).Reply()
if err != nil {
return false
}
var r []*randr.GetOutputInfoReply
for _, o := range sres.Outputs {
rp, _ := randr.GetOutputInfo(c, o, xproto.TimeCurrentTime).Reply()
r = append(r, rp)
}
for _, m := range ms {
m.wired = false
}
for i, info := range r {
if info != nil {
if info.Crtc != 0 {
ir, _ := randr.GetCrtcInfo(c, info.Crtc, xproto.TimeCurrentTime).Reply()
if ir != nil {
rect := xproto.Rectangle{ir.X, ir.Y, ir.Width, ir.Height}
m := ms.fromId(sres.Outputs[i])
if m != nil {
m.rectangle = rect
m.UpdateRoot()
for _, d := range m.desktops {
for _, _ = range d.clients {
//mm.Translate(mm, n.Client)
}
}
//mm.Arrange()
m.wired = true
} else {
m := ms.Add(e, x, rect)
m.name = string(info.Name)
m.id = sres.Outputs[i]
}
}
} else if !removeDisabled && info.Connection != randr.ConnectionDisconnected {
m := ms.fromId(sres.Outputs[i])
if m != nil {
m.wired = true
}
}
}
}
gpo, _ := randr.GetOutputPrimary(c, x.Root()).Reply()
if gpo != nil {
primary := ms.fromId(gpo.Output)
if primary != nil {
primary.primary = true
if ms.Focused() != primary {
primary.focused = true
}
//ewmh_update_current_desktop();
}
}
if mergeOverlapping {
ms.mergeOverlapping()
}
if removeUnplugged {
ms.removeUnplugged()
}
//update_motion_recorder();
return ms.Number() > 0
}