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def generate_barcode(product_code): Code128 = barcode.get_barcode_class('code128') writer = ImageWriter() dpi = 300 # Use a fixed DPI value (adjust it according to your printer's DPI) page_size_mm = (25.4, 54) page_size_pixels = tuple(int(dpi * page_size_mm[i] / 25.4) for i in (0, 1)) writer.dpi = dpi writer.module_width = int(page_size_pixels[0] / 110) # Adjust the value to fit the width writer.module_height = int(page_size_pixels[1] / 2.125) # Adjust the value to fit the height writer.font_size = 12 writer.text_distance = 0 writer.quiet_zone = 6.5 barcode_image = Code128(product_code, writer=writer) output_filename = 'temp_barcode' barcode_image.save(output_filename) return output_filename def print_barcode(printer, barcode_image): # Get the printer DC printer_dc = win32ui.CreateDC() printer_dc.CreatePrinterDC(printer) dpi = 300 # Use a fixed DPI value (adjust it according to your printer's DPI) page_size_mm = (25.4, 54) page_size_pixels = tuple(int(dpi * page_size_mm[i] / 25.4) for i in (0, 1)) image = Image.open(barcode_image+".png") image_width, image_height = image.size # Calculate the position to center the image on the page x_pos = int((page_size_pixels[0] - image_width) / 2) y_pos = int((page_size_pixels[1] - image_height) / 2) - 80 # Start the print job printer_dc.StartDoc(barcode_image+".png") printer_dc.StartPage() # Print the image dib = ImageWin.Dib(image) dib.draw(printer_dc.GetSafeHdc(), (x_pos, y_pos, image_width, image_height)) # End the print job printer_dc.EndPage() printer_dc.EndDoc() printer_dc.DeleteDC()