62 lines
1.3 KiB
Go
62 lines
1.3 KiB
Go
package main
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import (
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/*
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#include <stdint.h>
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*/
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"C"
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_ "image/png"
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"os"
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"strings"
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"bufio"
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"log"
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"net"
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"time"
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"github.com/kenshaw/escpos"
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)
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//export PrintImg
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func PrintImg(printer *C.char, imagePath *C.char) *C.char {
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goPrinter := C.GoString(printer)
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goImagePath := C.GoString(imagePath)
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// printer := "tcp:192.168.100.151:9100"
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// printer := "usb:/dev/usb/lp1"
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var w *bufio.ReadWriter
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if strings.HasPrefix(goPrinter, "tcp:") {
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location := strings.TrimLeft(goPrinter, "tcp:")
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conn, err := net.Dial("tcp", location)
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if err != nil {
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log.Println("error dialing:", err.Error())
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return NewErr(err)
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}
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defer conn.Close()
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w = bufio.NewReadWriter(bufio.NewReader(conn), bufio.NewWriter(conn))
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} else if strings.HasPrefix(goPrinter, "usb:") {
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location := strings.TrimLeft(goPrinter, "usb:")
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f, err := os.OpenFile(location, os.O_RDWR, os.ModeDevice)
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if err != nil {
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log.Println("error OpenFile usb:", err.Error())
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return NewErr(err)
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}
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defer f.Close()
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w = bufio.NewReadWriter(bufio.NewReader(f), bufio.NewWriter(f))
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}
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prt := escpos.New(w)
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prt.Init()
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prt.SetSmooth(1)
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err := printImg(prt, goImagePath)
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if err != nil {
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return NewErr(err)
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}
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prt.Cut()
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prt.End()
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w.Flush()
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time.Sleep(100 * time.Millisecond)
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return NewOk(nil)
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}
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