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def print_barcode(printer, barcode_image): # Get the printer DC printer_dc = win32ui.CreateDC() printer_dc.CreatePrinterDC(printer) # Get the page size and image size in pixels page_size_mm = (25.4, 54) page_size_pixels = tuple(int(windll.gdi32.GetDeviceCaps(printer_dc.GetSafeHdc(), i) * page_size_mm[i] / 1000) for i in (0, 1)) image = Image.open(barcode_image+".png") image_width, image_height = image.size # Fit the image to the page while maintaining its aspect ratio fit_image = ImageOps.fit(image, page_size_pixels, Image.ANTIALIAS) fit_width, fit_height = fit_image.size # Calculate the position to center the image on the page x_pos = int((page_size_pixels[0] - fit_width) / 2) y_pos = int((page_size_pixels[1] - fit_height) / 2) # Start the print job printer_dc.StartDoc(barcode_image+".png") printer_dc.StartPage() # Print the image dib = ImageWin.Dib(fit_image) dib.draw(printer_dc.GetSafeHdc(), (x_pos, y_pos, fit_width, fit_height)) # End the print job printer_dc.EndPage() printer_dc.EndDoc() printer_dc.ClosePrinter() print('Barcode printed successfully')