// checkCompatibility reads info in the X setup info struct and emits
// messages to stderr if they don't correspond to values that xgraphics
// supports.
// The idea is that in the future, we'll support more values.
// The real reason for checkCompatibility is to make debugging easier. Without
// it, if the values weren't what we'd expect, we'd see garbled images in the
// best case, and probably BadLength errors in the worst case.
func checkCompatibility(X *xgbutil.XUtil) {
s := X.Setup()
scrn := X.Screen()
failed := false
if s.ImageByteOrder != xproto.ImageOrderLSBFirst {
log.Printf("Your X server uses MSB image byte order. Unfortunately, " +
"xgraphics currently requires LSB image byte order. You may see " +
"weird things. Please report this.")
failed = true
}
if s.BitmapFormatBitOrder != xproto.ImageOrderLSBFirst {
log.Printf("Your X server uses MSB bitmap bit order. Unfortunately, " +
"xgraphics currently requires LSB bitmap bit order. If you " +
"aren't using X bitmaps, you should be able to proceed normally. " +
"Please report this.")
failed = true
}
if s.BitmapFormatScanlineUnit != 32 {
log.Printf("xgraphics expects that the scanline unit is set to 32, "+
"but your X server has it set to '%d'. "+
"Namely, xgraphics hasn't been tested on other values. Things "+
"may still work. Particularly, if you aren't using X bitmaps, "+
"you should be completely unaffected. Please report this.",
s.BitmapFormatScanlineUnit)
failed = true
}
if scrn.RootDepth != 24 {
log.Printf("xgraphics expects that the root window has a depth of 24, "+
"but yours has depth '%d'. Its possible things will still work "+
"if your value is 32, but will be unlikely to work with values "+
"less than 24. Please report this.", scrn.RootDepth)
failed = true
}
// Look for the default format for pixmaps and make sure bits per pixel
// is 32.
format := xgraphics.GetFormat(X, scrn.RootDepth)
if format.BitsPerPixel != 32 {
log.Printf("xgraphics expects that the bits per pixel for the root "+
"window depth is 32. On your system, the root depth is %d and "+
"the bits per pixel is %d. Things will most certainly not work. "+
"Please report this.",
scrn.RootDepth, format.BitsPerPixel)
failed = true
}
// Give instructions on reporting the issue.
if failed {
log.Printf("Please report the aforementioned error message(s) at " +
"https://github.com/BurntSushi/xgbutil. Please also include the " +
"entire output of the `xdpyinfo` command in your report. Thanks!")
} else {
log.Printf("No compatibility issues detected.")
}
}
func getVisualDepth(X *xgbutil.XUtil, vid xproto.Visualid) byte {
for _, dinfo := range X.Screen().AllowedDepths {
for _, vis := range dinfo.Visuals {
if vis.VisualId == vid {
return dinfo.Depth
}
}
}
panic(fmt.Sprintf("Could not find depth for visual %d", vid))
}
func newParent(X *xgbutil.XUtil, cid xproto.Window) (*Parent, error) {
parent, err := xwindow.Generate(X)
if err != nil {
logger.Error.Printf("Could not create a parent window for client "+
"with id '%d' because: %s", cid, err)
logger.Error.Fatalf("In a state where no new windows can be created. " +
"Unfortunately, we must exit.")
}
// clientAttrs, err := xproto.GetWindowAttributes(X.Conn(), cid).Reply()
// if err != nil {
// return nil, fmt.Errorf("Could not get window attributes: %s", err)
// }
// visual := clientAttrs.Visual
// vdepth := getVisualDepth(X, visual)
visual := X.Screen().RootVisual
vdepth := X.Screen().RootDepth
// logger.Debug.Printf("Visualid: %x, Depth: %d", visual, vdepth)
err = xproto.CreateWindowChecked(X.Conn(),
vdepth, parent.Id, X.RootWin(),
0, 0, 1, 1, 0, xproto.WindowClassInputOutput, visual,
xproto.CwEventMask,
[]uint32{
xproto.EventMaskSubstructureRedirect |
xproto.EventMaskButtonPress |
xproto.EventMaskButtonRelease |
xproto.EventMaskFocusChange,
}).Check()
if err != nil {
return nil, fmt.Errorf("Could not create window: %s", err)
}
err = xproto.ReparentWindowChecked(X.Conn(),
cid, parent.Id, 0, 0).Check()
if err != nil {
return nil, fmt.Errorf("Could not reparent window: %s", err)
}
return &Parent{
Window: parent,
MoveState: &MoveState{},
ResizeState: &ResizeState{},
isMapped: false,
}, nil
}
// getVisualInfo searches SetupInfo for a VisualInfo value matching
// the depth provided.
// XXX: This isn't used (yet).
func getVisualInfo(X *xgbutil.XUtil, depth byte,
visualid xproto.Visualid) *xproto.VisualInfo {
for _, depthInfo := range X.Screen().AllowedDepths {
fmt.Printf("%#v\n", depthInfo)
// fmt.Printf("%#v\n", depthInfo.Visuals)
fmt.Println("------------")
if depthInfo.Depth == depth {
for _, visual := range depthInfo.Visuals {
if visual.VisualId == visualid {
return &visual
}
}
}
}
return nil
}