printer

websocket_server/convert_img.py

@@ -0,0 +1,209 @@
+import os
+from PIL import Image
+
+def image_to_tspl_commands(image_path):
+    """
+    读取图片并转换为 TSPL 打印指令 (bytes)
+    包含: SIZE, GAP, CLS, BITMAP, PRINT
+    """
+    if not os.path.exists(image_path):
+        print(f"错误: 找不到图片 {image_path}")
+        return None
+
+    try:
+        img = Image.open(image_path)
+    except Exception as e:
+        print(f"无法打开图片: {e}")
+        return None
+
+    # 处理透明背景
+    if img.mode in ('RGBA', 'LA') or (img.mode == 'P' and 'transparency' in img.info):
+        alpha = img.convert('RGBA').split()[-1]
+        bg = Image.new("RGBA", img.size, (255, 255, 255, 255))
+        bg.paste(img, mask=alpha)
+        img = bg
+
+    # 目标尺寸: 48mm x 30mm @ 203dpi
+    # 宽度: 48 * 8 = 384 dots
+    # 高度: 30 * 8 = 240 dots
+    MAX_WIDTH = 384
+    MAX_HEIGHT = 240
+    
+    # 使用 thumbnail 进行等比缩放，确保不超过最大尺寸
+    img.thumbnail((MAX_WIDTH, MAX_HEIGHT), Image.Resampling.LANCZOS)
+    
+    target_width, target_height = img.size
+    print(f"图片缩放后尺寸: {target_width}x{target_height}")
+    
+    # 转为二值图
+    # 1. 先转灰度
+    img = img.convert('L')
+    # 2. 二值化 (使用默认的抖动算法)
+    img = img.convert('1')
+    
+    # 构造 BITMAP 数据
+    width_bytes = (target_width + 7) // 8
+    data = bytearray()
+    
+    # 遍历像素生成数据
+    # TSPL BITMAP 数据: 1=Black(Print), 0=White(No Print)
+    # PIL '1' mode: 0=Black, 255=White
+    
+    for y in range(target_height):
+        row_bytes = bytearray(width_bytes)
+        for x in range(target_width):
+            pixel = img.getpixel((x, y))
+            
+            # 逻辑修正:
+            # 我们希望 黑色像素(0) -> 打印(1)
+            # 白色像素(255) -> 不打印(0)
+            
+            should_print = False
+            if pixel == 0: # Black
+                should_print = True
+            
+            if should_print:
+                byte_index = x // 8
+                bit_index = 7 - (x % 8)
+                row_bytes[byte_index] |= (1 << bit_index)
+        
+        data.extend(row_bytes)
+        
+    # 计算居中偏移
+    x_offset = (MAX_WIDTH - target_width) // 2
+    y_offset = (MAX_HEIGHT - target_height) // 2
+    
+    # 生成指令
+    cmds = bytearray()
+    
+    # 1. 初始化
+    # CLS
+    cmds.extend(b"CLS\r\n")
+    # SIZE 48 mm, 30 mm
+    cmds.extend(b"SIZE 48 mm, 30 mm\r\n")
+    # GAP 2 mm, 0 mm
+    cmds.extend(b"GAP 2 mm, 0 mm\r\n")
+    # HOME
+    cmds.extend(b"HOME\r\n")
+    
+    # 2. BITMAP
+    # BITMAP x, y, width_bytes, height, mode, data
+    header = f"BITMAP {x_offset},{y_offset},{width_bytes},{target_height},0,".encode('utf-8')
+    cmds.extend(header)
+    cmds.extend(data)
+    cmds.extend(b"\r\n") # BITMAP data 后面通常不需要回车，但有些文档建议加? 不，binary data后紧跟下一个指令
+    # TSPL protocol says: BITMAP ... data ... CR LF is NOT required after data, but next command must start.
+    # Usually it's safer to just send data.
+    
+    # 3. PRINT
+    cmds.extend(b"PRINT 1\r\n")
+    
+    return cmds
+
+def generate_micropython_printer_script(image_path, output_py_path):
+    """
+    保留此函数以兼容现有 workflow，但内部使用新的逻辑
+    """
+    cmds = image_to_tspl_commands(image_path)
+    if not cmds:
+        return
+
+    # 提取 BITMAP 数据部分用于生成脚本 (因为脚本里是用 uart.write 分段发送的)
+    # 为了简单，我们重新解析一下 cmds 或者直接重写这部分逻辑
+    # 但为了脚本的可读性，还是像之前一样生成
+    
+    # 重新执行一遍核心逻辑来获取参数 (为了生成漂亮的 python 代码)
+    if not os.path.exists(image_path): return
+    img = Image.open(image_path)
+    if img.mode in ('RGBA', 'LA') or (img.mode == 'P' and 'transparency' in img.info):
+        alpha = img.convert('RGBA').split()[-1]
+        bg = Image.new("RGBA", img.size, (255, 255, 255, 255))
+        bg.paste(img, mask=alpha)
+        img = bg
+        
+    MAX_WIDTH = 384
+    MAX_HEIGHT = 240
+    img.thumbnail((MAX_WIDTH, MAX_HEIGHT), Image.Resampling.LANCZOS)
+    target_width, target_height = img.size
+    img = img.convert('L').convert('1')
+    
+    width_bytes = (target_width + 7) // 8
+    data = bytearray()
+    for y in range(target_height):
+        row_bytes = bytearray(width_bytes)
+        for x in range(target_width):
+            if img.getpixel((x, y)) == 0:
+                byte_index = x // 8
+                bit_index = 7 - (x % 8)
+                row_bytes[byte_index] |= (1 << bit_index)
+        data.extend(row_bytes)
+        
+    x_offset = (MAX_WIDTH - target_width) // 2
+    y_offset = (MAX_HEIGHT - target_height) // 2
+    
+    hex_data = data.hex()
+    
+    script_content = f'''from machine import UART
+import time
+from config import ttl_tx, ttl_rx
+from printer_driver import TsplPrinter
+import ubinascii
+
+# ==============================================================================
+# 图片打印脚本 (自动生成)
+# ==============================================================================
+# 图片来源: {image_path}
+# ==============================================================================
+
+# 1. 初始化
+uart = UART(1, baudrate=115200, tx=ttl_tx, rx=ttl_rx)
+printer = TsplPrinter(uart)
+
+def print_image():
+    print("=== 开始打印图片 ===")
+    
+    # 2. 设置标签
+    printer.cls()
+    printer.size(48, 30)
+    printer.gap(2, 0)
+    
+    # 3. 准备图片数据
+    img_hex = "{hex_data}"
+    img_data = ubinascii.unhexlify(img_hex)
+    
+    # 4. 发送 BITMAP 指令
+    print(f"正在发送图片数据 ({{len(img_data)}} bytes)...")
+    
+    # BITMAP X, Y, width_bytes, height, mode, data
+    # 居中打印
+    cmd = f"BITMAP {x_offset},{y_offset},{width_bytes},{target_height},0,".encode('utf-8')
+    uart.write(cmd)
+    
+    chunk_size = 128
+    for i in range(0, len(img_data), chunk_size):
+        uart.write(img_data[i : i + chunk_size])
+        time.sleep(0.005)
+        
+    uart.write(b'\\r\\n')
+    
+    # 5. 打印
+    printer.print_out(1)
+    print("打印完成")
+
+if __name__ == "__main__":
+    try:
+        print_image()
+    except Exception as e:
+        print(f"错误: {{e}}")
+'''
+
+    with open(output_py_path, 'w', encoding='utf-8') as f:
+        f.write(script_content)
+    
+    print(f"成功生成 MicroPython 脚本: {output_py_path}")
+
+if __name__ == "__main__":
+    generate_micropython_printer_script(
+        "/Users/jeremygan/Desktop/python_dev/V2_micropython/test_image.png",
+        "/Users/jeremygan/Desktop/python_dev/V2_micropython/printer_image_print.py"
+    )

websocket_server/server.py

@@ -15,7 +15,8 @@ from dashscope import ImageSynthesis
 from dashscope import Generation
 
 import sys
-sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+# import os
+# sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
 import convert_img
 
 # 加载环境变量