func initDesktop(xScreen *xp.ScreenInfo) {
xFont, err := xp.NewFontId(xConn)
if err != nil {
log.Fatal(err)
}
xCursor, err := xp.NewCursorId(xConn)
if err != nil {
log.Fatal(err)
}
err = xp.OpenFontChecked(xConn, xFont, uint16(len("cursor")), "cursor").Check()
if err != nil {
log.Fatal(err)
}
const xcLeftPtr = 68 // XC_left_ptr from cursorfont.h.
err = xp.CreateGlyphCursorChecked(
xConn, xCursor, xFont, xFont, xcLeftPtr, xcLeftPtr+1,
0xffff, 0xffff, 0xffff, 0, 0, 0).Check()
if err != nil {
log.Fatal(err)
}
err = xp.CloseFontChecked(xConn, xFont).Check()
if err != nil {
log.Fatal(err)
}
desktopXWin, err = xp.NewWindowId(xConn)
if err != nil {
log.Fatal(err)
}
desktopXGC, err = xp.NewGcontextId(xConn)
if err != nil {
log.Fatal(err)
}
desktopWidth = xScreen.WidthInPixels
desktopHeight = xScreen.HeightInPixels
if err := xp.CreateWindowChecked(
xConn, xScreen.RootDepth, desktopXWin, xScreen.Root,
0, 0, desktopWidth, desktopHeight, 0,
xp.WindowClassInputOutput,
xScreen.RootVisual,
xp.CwOverrideRedirect|xp.CwEventMask,
[]uint32{
1,
xp.EventMaskExposure,
},
).Check(); err != nil {
log.Fatal(err)
}
if len(xSettings) != 0 {
initXSettings()
}
if err := xp.ConfigureWindowChecked(
xConn,
desktopXWin,
xp.ConfigWindowStackMode,
[]uint32{
xp.StackModeBelow,
},
).Check(); err != nil {
log.Fatal(err)
}
if err := xp.ChangeWindowAttributesChecked(
xConn,
desktopXWin,
xp.CwBackPixel|xp.CwCursor,
[]uint32{
xScreen.BlackPixel,
uint32(xCursor),
},
).Check(); err != nil {
log.Fatal(err)
}
if err := xp.CreateGCChecked(
xConn,
desktopXGC,
xp.Drawable(xScreen.Root),
0,
nil,
).Check(); err != nil {
log.Fatal(err)
}
if err := xp.MapWindowChecked(xConn, desktopXWin).Check(); err != nil {
log.Fatal(err)
}
}
func loadGC(name string, c *xgb.Conn, scr *xproto.ScreenInfo) error {
var gc gcontext
/* Foreground GC */
id, err := xproto.NewGcontextId(c)
if err != nil {
return err
}
var mask uint32 = xproto.GcForeground | xproto.GcBackground |
xproto.GcLineWidth | xproto.GcFont
values := defaultGCValues(c)
{
cl, e := config.String(name + ".gc.fg")
if e == nil {
values[0], e = openColor(c, scr, readColor(cl))
if e != nil {
return e
}
}
cl, e = config.String(name + ".gc.bg")
if e == nil {
values[1], e = openColor(c, scr, readColor(cl))
if e != nil {
return e
}
}
wd, e := config.Int(name + ".gc.width")
if e == nil {
values[2] = uint32(wd)
}
cl, e = config.String(name + ".gc.font")
if e == nil {
fn, e := openFont(c, cl)
if e != nil {
return e
}
values[3] = uint32(fn)
}
}
err = xproto.CreateGCChecked(c, id, xproto.Drawable(scr.Root), mask, values).Check()
if err != nil {
return err
}
gc.fg = id
gc.font = xproto.Font(values[3])
gc.border = values[2]
/* Query the font height */
{
rep, e := xproto.QueryFont(c, xproto.Fontable(gc.font)).Reply()
if e != nil {
return e
}
gc.fontHeight = uint32(rep.FontAscent) + uint32(rep.FontDescent)
gc.fontUp = uint32(rep.FontAscent)
}
/* Background GC */
id, err = xproto.NewGcontextId(c)
if err != nil {
return err
}
mask = xproto.GcForeground | xproto.GcBackground | xproto.GcLineWidth
values[0], values[1] = values[1], values[0]
err = xproto.CreateGCChecked(c, id, xproto.Drawable(scr.Root), mask, values).Check()
if err != nil {
return err
}
gc.bg = id
/* Border GC */
id, err = xproto.NewGcontextId(c)
if err != nil {
return err
}
{
cl, e := config.String(name + ".gc.bc")
if e == nil {
values[0], e = openColor(c, scr, readColor(cl))
if e != nil {
return e
}
} else {
values[0] = defaultgc.bc
}
}
values[1] = values[0]
err = xproto.CreateGCChecked(c, id, xproto.Drawable(scr.Root), mask, values).Check()
if err != nil {
return err
}
gc.bc = id
/* Width */
{
wd, e := config.Int(name + ".width")
if e == nil {
gc.width = uint32(wd)
} else {
gc.width = defaultgc.width
}
}
ctxs[name] = &gc
return nil
}