t

convert_img.py

@@ -3,7 +3,7 @@ from machine import UART
 from config import ttl_tx, ttl_rx
 from printer_driver import TsplPrinter
 
-def print_bitmap(printer, data, width, height, x_offset=0, y_offset=0):
+def print_bitmap(printer, data, width, height, x_offset=0, y_offset=0, invert=False):
     """
     发送位图数据到打印机
     :param printer: TsplPrinter 对象
@@ -12,7 +12,12 @@ def print_bitmap(printer, data, width, height, x_offset=0, y_offset=0):
     :param height: 图像高度 (dots)
     :param x_offset: X轴偏移
     :param y_offset: Y轴偏移
+    :param invert: 是否反色打印 (默认False)
     """
+    if invert:
+        # 反转每一个字节
+        data = bytearray([~b & 0xFF for b in data])
+
     width_bytes = (width + 7) // 8
     
     # TSPL BITMAP 指令