Add Win32Raw printer to available printers

src/escpos/printer.py

@@ -334,3 +334,51 @@ class Dummy(Escpos):
 
     def close(self):
         pass
+
+
+_WIN32PRINT=False
+try:
+ import win32print
+ _WIN32PRINT=True
+except ImportError:
+ pass 
+
+if _WIN32PRINT:
+    class Win32Raw(Escpos):
+        def __init__(self, printer_name = None, profile=None, magic_encode_args=None, **kwargs):
+            super().__init__(profile=profile, magic_encode_args=magic_encode_args, **kwargs)
+            if printer_name is not None:
+                self.printer_name = printer_name
+            else:
+                self.printer_name = win32print.GetDefaultPrinter()
+            self.hPrinter = None
+
+
+        def open(self, job_name="python-escpos"):
+            if self.printer_name is None:
+                raise Exception("Printer not found")
+            self.hPrinter = win32print.OpenPrinter (self.printer_name)
+            self.current_job = win32print.StartDocPrinter (self.hPrinter, 1, (job_name, None, "RAW"))
+            win32print.StartPagePrinter (self.hPrinter)
+
+        def close(self):
+            if not self.hPrinter:
+                return
+            win32print.EndPagePrinter (self.hPrinter)
+            win32print.EndDocPrinter (self.hPrinter)
+            win32print.ClosePrinter (self.hPrinter)
+            self.hPrinter = None
+        
+        def _raw(self, msg):
+            """ Print any command sent in raw format
+
+            :param msg: arbitrary code to be printed
+            :type msg: bytes
+            """
+            if self.printer_name is None:
+                raise Exception("Printer not found")
+            if self.hPrinter is None:
+                raise Exception("Printer job not opened")
+            win32print.WritePrinter (self.hPrinter, msg)
+                        
+