Working library bridge

Makefile

@@ -0,0 +1,4 @@
+build:
+	cd faxmachine &&\
+	go build -o ../library_bridge.so -buildmode=c-shared ../library_bridge.go 
+

library_bridge.go

@@ -1,11 +1,75 @@
 package main
 
+import (
+	"fmt"
+	_ "image"
+	_ "image/gif"
+	_ "image/jpeg"
+	_ "image/png"
+	"log"
+	_ "os"
+
+	_ "github.com/jbuchbinder/gopnm"
+	_ "golang.org/x/image/webp"
+
+	_ "github.com/lestrrat-go/dither"
+	_ "github.com/nfnt/resize"
+
+	"git.sr.ht/~guacamolie/faxmachine/escpos"
+	"git.sr.ht/~guacamolie/faxmachine/escpos/protocol"
+)
+
 import "C"
 
-//export Add
-func Add(a, b int) int {
-    return a + b
+//export printimg
+func printimg(path *C.char) {
+    fmt.Print(C.GoString(path))
+
+	p, err := escpos.StartUSBPrinter(C.GoString(path), protocol.TMT88IV, escpos.FlagNone)
+	if err != nil {
+		log.Fatalf("failed to start printer: %v\n", err)
+	}
+	defer p.Close()
+
+	if err := p.EnableASB(protocol.ASBReportAll); err != nil {
+		log.Fatalf("failed to enable ASB: %v\n", err)
+	}
+	go func() {
+		for status := range p.ASBStatus() {
+			log.Printf("received ASB status: %#v\n", status)
+		}
+	}()
+
+	//img, _, err := image.Decode(os.Stdin)
+	//if err != nil {
+	//	log.Fatalf("failed to get decode image: %v\n", err)
+	//}
+	//img = resize.Resize(512, 0, img, resize.Lanczos3)
+	//img = dither.Monochrome(dither.FloydSteinberg, img, 1.18)
+
+//	if err := p.SetEncoding(escpos.CharPagePC427); err != nil {
+//		log.Fatalf("failed to set encoding: %v\n", err)
+//	}
+	if err := p.SetPrintSpeed(1); err != nil {
+		log.Fatalf("failed to set print speed: %v\n", err)
+	}
+	//if err := p.PrintImage(img); err != nil {
+	//	log.Fatalf("failed to print image: %v\n", err)
+	//}
+
+	//if len(os.Args) > 2 && os.Args[2] != "" {
+	//	fmt.Fprintf(p, "\n%s\n", os.Args[2])
+	//}
+
+	fmt.Fprint(p, "\n\n\n")
+
+	if err := p.CutPaper(); err != nil {
+		log.Fatalf("failed to cut paper: %v", err)
+	}
+
+	if err := p.Wait(); err != nil {
+		log.Fatalf("failed to print: %v\n", err)
+	}
 }
 
 func main() {}
-

library_bridge.h

@@ -74,7 +74,7 @@ typedef struct { void *data; GoInt len; GoInt cap; } GoSlice;
 extern "C" {
 #endif
 
-extern GoInt Add(GoInt a, GoInt b);
+extern void printimg(char* path);
 
 #ifdef __cplusplus
 }

test.py

@@ -1,9 +1,5 @@
 import ctypes
 
-# Load the Go shared library
 mylib = ctypes.CDLL('./library_bridge.so')
 
-# Call the Add function from Go
-result = mylib.Add(3, 5)
-print(result)
-
+mylib.printimg("/dev/usb/lp0".encode('utf-8'))