add simple ocr support

robotgo.go

@@ -61,6 +61,7 @@ import (
 	"time"
 	"unsafe"
 	// "syscall"
+	"os/exec"
 
 	"github.com/go-vgo/robotgo/clipboard"
 	"github.com/shirou/gopsutil/process"
@@ -786,6 +787,25 @@ func TocharBitmap(bit C.MMBitmapRef) *C.char {
 	return strBit
 }
 
+// GetText get the image text by tesseract ocr
+func GetText(imgPath string, args ...string) (string, error) {
+	var lang = "eng"
+
+	if len(args) > 0 {
+		lang = args[0]
+		if lang == "zh" {
+			lang = "chi_sim"
+		}
+	}
+
+	body, err := exec.Command("tesseract", imgPath,
+		"stdout", "-l", lang).Output()
+	if err != nil {
+		return "", err
+	}
+	return string(body), nil
+}
+
 func internalFindBitmap(bit, sbit C.MMBitmapRef, tolerance float64) (int, int) {
 	pos := C.find_bitmap(bit, sbit, C.float(tolerance))
 	// fmt.Println("pos----", pos)

robotgo_ocr.go

@@ -0,0 +1,26 @@
+// +build ocr
+
+package robotgo
+
+import (
+	"github.com/otiai10/gosseract"
+)
+
+// GetText get the image text by tesseract ocr
+func GetText(imgPath string, args ...string) (string, error) {
+	var lang = "eng"
+
+	if len(args) > 0 {
+		lang = args[0]
+		if lang == "zh" {
+			lang = "chi_sim"
+		}
+	}
+
+	client := gosseract.NewClient()
+	defer client.Close()
+
+	client.SetImage(imgPath)
+	client.SetLanguage(lang)
+	return client.Text()
+}