func addIcon(coff *coff.Coff, fname string, newID <-chan uint16) error {
f, err := os.Open(fname)
if err != nil {
return err
}
//defer f.Close() don't defer, files will be closed by OS when app closes
icons, err := ico.DecodeHeaders(f)
if err != nil {
return err
}
if len(icons) > 0 {
// RT_ICONs
group := gRPICONDIR{ICONDIR: ico.ICONDIR{
Reserved: 0, // magic num.
Type: 1, // magic num.
Count: uint16(len(icons)),
}}
for _, icon := range icons {
id := <-newID
r := io.NewSectionReader(f, int64(icon.ImageOffset), int64(icon.BytesInRes))
coff.AddResource(rtIcon, id, r)
group.Entries = append(group.Entries, gRPICONDIRENTRY{IconDirEntryCommon: icon.IconDirEntryCommon, ID: id})
}
id := <-newID
coff.AddResource(rtGroupIcon, id, group)
}
return nil
}
func run(fnamein, fnameico, fnameout string) error {
manifest, err := binutil.SizedOpen(fnamein)
if err != nil {
return fmt.Errorf("Error opening manifest file '%s': %s", fnamein, err)
}
defer manifest.Close()
var icons []ico.ICONDIRENTRY
var iconsf *os.File
if fnameico != "" {
iconsf, err = os.Open(fnameico)
if err != nil {
return err
}
defer iconsf.Close()
icons, err = ico.DecodeHeaders(iconsf)
if err != nil {
return err
}
}
newid := make(chan uint16)
go func() {
for i := uint16(1); ; i++ {
newid <- i
}
}()
coff := coff.NewRSRC()
coff.AddResource(RT_MANIFEST, <-newid, manifest)
if len(icons) > 0 {
// RT_ICONs
group := GRPICONDIR{ICONDIR: ico.ICONDIR{
Reserved: 0, // magic num.
Type: 1, // magic num.
Count: uint16(len(icons)),
}}
for _, icon := range icons {
id := <-newid
r := io.NewSectionReader(iconsf, int64(icon.ImageOffset), int64(icon.BytesInRes))
coff.AddResource(RT_ICON, id, r)
group.Entries = append(group.Entries, GRPICONDIRENTRY{icon.IconDirEntryCommon, id})
}
// RT_GROUP_ICON
coff.AddResource(RT_GROUP_ICON, <-newid, group)
}
coff.Freeze()
return write(coff, fnameout)
}