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This commit is contained in:
sainw
2026-06-02 10:08:24 +06:30
parent ecb03c1fb7
commit d7ffc17d71
9 changed files with 98 additions and 296 deletions
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91
printer.go
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@@ -17,33 +17,11 @@ import (
"github.com/kenshaw/escpos"
)
import (
"fmt"
"github.com/google/gousb"
)
type USBReadWriter struct {
out *gousb.OutEndpoint
in *gousb.InEndpoint // Optional, can be nil if you only write
}
func (urw *USBReadWriter) Write(p []byte) (n int, err error) {
return urw.out.Write(p)
}
func (urw *USBReadWriter) Read(p []byte) (n int, err error) {
if urw.in == nil {
return 0, fmt.Errorf("read not supported")
}
return urw.in.Read(p)
}
//export PrintImg
func PrintImg(printer *C.char, imagePath *C.char) *C.char {
goPrinter := C.GoString(printer)
goImagePath := C.GoString(imagePath)
var out *gousb.OutEndpoint
// printer := "tcp:192.168.100.151:9100"
// printer := "usb:/dev/usb/lp1"
var w *bufio.ReadWriter
@@ -65,53 +43,56 @@ func PrintImg(printer *C.char, imagePath *C.char) *C.char {
}
defer f.Close()
w = bufio.NewReadWriter(bufio.NewReader(f), bufio.NewWriter(f))
} else if strings.HasPrefix(goPrinter, "int:") {
ctx := gousb.NewContext()
// location := strings.TrimLeft(goPrinter, "int:")
targetBus := 1
targetAddr := 5
devs, err := ctx.OpenDevices(func(desc *gousb.DeviceDesc) bool {
return int(desc.Bus) == targetBus && int(desc.Address) == targetAddr
})
if err != nil || len(devs) == 0 {
log.Fatal("Could not find or open the device")
}
dev := devs[0]
defer dev.Close()
dev.SetAutoDetach(true)
// } else if strings.HasPrefix(goPrinter, "int:") {
// ctx := gousb.NewContext()
// // location := strings.TrimLeft(goPrinter, "int:")
// targetBus := 1
// targetAddr := 5
// devs, err := ctx.OpenDevices(func(desc *gousb.DeviceDesc) bool {
// return int(desc.Bus) == targetBus && int(desc.Address) == targetAddr
// })
// if err != nil || len(devs) == 0 {
// log.Fatal("Could not find or open the device")
// }
// dev := devs[0]
// defer dev.Close()
// dev.SetAutoDetach(true)
// 2. Claim the default interface (usually 0 for printers)
// Note: This may require detaching the kernel driver on Linux
intf, done, err := dev.DefaultInterface()
if err != nil {
log.Fatalf("Failed to claim interface: %v", err)
}
defer done()
// // 2. Claim the default interface (usually 0 for printers)
// // Note: This may require detaching the kernel driver on Linux
// intf, done, err := dev.DefaultInterface()
// if err != nil {
// log.Fatalf("Failed to claim interface: %v", err)
// }
// defer done()
// 3. Open the Bulk Output Endpoint (usually endpoint #1 or #2)
// You may need to inspect desc.Endpoints to find the correct Bulk Out ID
out, err = intf.OutEndpoint(1)
if err != nil {
log.Fatalf("Failed to open OUT endpoint: %v", err)
}
// w = bufio.NewReadWriter(bufio.NewReader(outPort), bufio.NewWriter(f))
rw := &USBReadWriter{out: out}
reader := bufio.NewReader(rw)
writer := bufio.NewWriter(rw)
w = bufio.NewReadWriter(reader, writer)
// // 3. Open the Bulk Output Endpoint (usually endpoint #1 or #2)
// // You may need to inspect desc.Endpoints to find the correct Bulk Out ID
// out, err = intf.OutEndpoint(1)
// if err != nil {
// log.Fatalf("Failed to open OUT endpoint: %v", err)
// }
// // w = bufio.NewReadWriter(bufio.NewReader(outPort), bufio.NewWriter(f))
// rw := &USBReadWriter{out: out}
// reader := bufio.NewReader(rw)
// writer := bufio.NewWriter(rw)
// w = bufio.NewReadWriter(reader, writer)
}
prt := escpos.New(w)
prt.Init()
prt.SetSmooth(1)
prt.SetAlign("left")
err := printImg(prt, goImagePath)
if err != nil {
return NewErr(err)
}
prt.WriteRaw([]byte{0x1B, 0x64, 0x03})
prt.Cut()
prt.End()
w.Flush()
time.Sleep(100 * time.Millisecond)
time.Sleep(1 * time.Second)
return NewOk(nil)
}