This commit is contained in:
jeremygan2021
279
convert_img.py
279
convert_img.py
@@ -1,226 +1,81 @@
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import os
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from PIL import Image, ImageOps
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def image_to_tspl_commands(image_path):
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"""
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读取图片并转换为 TSPL 打印指令 (bytes)
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包含: SIZE, GAP, CLS, BITMAP, PRINT
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"""
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if not os.path.exists(image_path):
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print(f"错误: 找不到图片 {image_path}")
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return None
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try:
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img = Image.open(image_path)
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except Exception as e:
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print(f"无法打开图片: {e}")
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return None
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# 处理透明背景
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if img.mode in ('RGBA', 'LA') or (img.mode == 'P' and 'transparency' in img.info):
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alpha = img.convert('RGBA').split()[-1]
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bg = Image.new("RGBA", img.size, (255, 255, 255, 255))
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bg.paste(img, mask=alpha)
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img = bg
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# 目标尺寸: 48mm x 30mm @ 203dpi
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# 宽度: 48 * 8 = 384 dots
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# 高度: 30 * 8 = 240 dots
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MAX_WIDTH = 384
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MAX_HEIGHT = 240
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# 1. 强制裁剪/缩放以填满 (Aspect Fill / Cover)
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# 计算目标比例
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target_ratio = MAX_WIDTH / MAX_HEIGHT
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img_ratio = img.width / img.height
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if img_ratio > target_ratio:
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# 图片更宽，以高度为基准缩放，然后裁剪宽度
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new_height = MAX_HEIGHT
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new_width = int(new_height * img_ratio)
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img = img.resize((new_width, new_height), Image.Resampling.LANCZOS)
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# 居中裁剪
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left = (new_width - MAX_WIDTH) // 2
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img = img.crop((left, 0, left + MAX_WIDTH, MAX_HEIGHT))
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else:
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# 图片更高，以宽度为基准缩放，然后裁剪高度
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new_width = MAX_WIDTH
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new_height = int(new_width / img_ratio)
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img = img.resize((new_width, new_height), Image.Resampling.LANCZOS)
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# 居中裁剪
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top = (new_height - MAX_HEIGHT) // 2
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img = img.crop((0, top, MAX_WIDTH, top + MAX_HEIGHT))
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target_width, target_height = img.size
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print(f"图片处理后尺寸 (Cover模式): {target_width}x{target_height}")
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# 转为二值图
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# 1. 先转灰度
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img = img.convert('L')
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# 2. 二值化 (使用默认的抖动算法)
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img = img.convert('1')
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# 构造 BITMAP 数据
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width_bytes = (target_width + 7) // 8
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data = bytearray()
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# 遍历像素生成数据
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for y in range(target_height):
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row_bytes = bytearray(width_bytes)
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for x in range(target_width):
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pixel = img.getpixel((x, y))
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# 逻辑修正:
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# 我们希望 黑色像素(0) -> 打印(1)
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# 白色像素(255) -> 不打印(0)
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# 使用 < 128 判定，增加容错性，防止像素值偏移
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should_print = False
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if pixel < 128: # Black or Dark Gray
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should_print = True
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if should_print:
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byte_index = x // 8
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bit_index = 7 - (x % 8)
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row_bytes[byte_index] |= (1 << bit_index)
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data.extend(row_bytes)
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# 计算居中偏移 (理论上 Cover 模式下偏移为 0)
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x_offset = (MAX_WIDTH - target_width) // 2
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y_offset = (MAX_HEIGHT - target_height) // 2
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# 生成指令
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cmds = bytearray()
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# 1. 初始化
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# CLS
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cmds.extend(b"CLS\r\n")
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# SIZE 48 mm, 30 mm
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cmds.extend(b"SIZE 48 mm, 30 mm\r\n")
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# GAP 2 mm, 0 mm
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cmds.extend(b"GAP 2 mm, 0 mm\r\n")
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# HOME
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cmds.extend(b"HOME\r\n")
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# 2. BITMAP
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# BITMAP x, y, width_bytes, height, mode, data
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header = f"BITMAP {x_offset},{y_offset},{width_bytes},{target_height},0,".encode('utf-8')
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cmds.extend(header)
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cmds.extend(data)
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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
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# TSPL protocol says: BITMAP ... data ... CR LF is NOT required after data, but next command must start.
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# Usually it's safer to just send data.
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# 3. PRINT
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cmds.extend(b"PRINT 1\r\n")
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return cmds
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def generate_micropython_printer_script(image_path, output_py_path):
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"""
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保留此函数以兼容现有 workflow，但内部使用新的逻辑
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"""
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cmds = image_to_tspl_commands(image_path)
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if not cmds:
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return
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# 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)
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# 为了简单，我们重新解析一下 cmds 或者直接重写这部分逻辑
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# 但为了脚本的可读性，还是像之前一样生成
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# 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)
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if not os.path.exists(image_path): return
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img = Image.open(image_path)
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if img.mode in ('RGBA', 'LA') or (img.mode == 'P' and 'transparency' in img.info):
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alpha = img.convert('RGBA').split()[-1]
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bg = Image.new("RGBA", img.size, (255, 255, 255, 255))
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bg.paste(img, mask=alpha)
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img = bg
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MAX_WIDTH = 384
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MAX_HEIGHT = 240
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img.thumbnail((MAX_WIDTH, MAX_HEIGHT), Image.Resampling.LANCZOS)
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target_width, target_height = img.size
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img = img.convert('L').convert('1')
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width_bytes = (target_width + 7) // 8
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data = bytearray()
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for y in range(target_height):
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row_bytes = bytearray(width_bytes)
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for x in range(target_width):
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if img.getpixel((x, y)) == 0:
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byte_index = x // 8
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bit_index = 7 - (x % 8)
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row_bytes[byte_index] |= (1 << bit_index)
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data.extend(row_bytes)
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x_offset = (MAX_WIDTH - target_width) // 2
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y_offset = (MAX_HEIGHT - target_height) // 2
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hex_data = data.hex()
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script_content = f'''from machine import UART
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import time
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from machine import UART
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from config import ttl_tx, ttl_rx
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from printer_driver import TsplPrinter
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import ubinascii
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# ==============================================================================
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# 图片打印脚本 (自动生成)
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# ==============================================================================
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# 图片来源: {image_path}
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# ==============================================================================
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def print_bitmap(printer, data, width, height, x_offset=0, y_offset=0):
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"""
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发送位图数据到打印机
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:param printer: TsplPrinter 对象
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:param data: 位图数据 (bytes), 每一位代表一个像素 (1=print/黑, 0=no print/白)
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:param width: 图像宽度 (dots)
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:param height: 图像高度 (dots)
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:param x_offset: X轴偏移
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:param y_offset: Y轴偏移
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"""
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width_bytes = (width + 7) // 8
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# 1. 初始化
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uart = UART(1, baudrate=115200, tx=ttl_tx, rx=ttl_rx)
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printer = TsplPrinter(uart)
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def print_image():
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print("=== 开始打印图片 ===")
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# 2. 设置标签
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printer.cls()
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printer.size(48, 30)
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printer.gap(2, 0)
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# 3. 准备图片数据
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img_hex = "{hex_data}"
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img_data = ubinascii.unhexlify(img_hex)
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# 4. 发送 BITMAP 指令
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print(f"正在发送图片数据 ({{len(img_data)}} bytes)...")
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# BITMAP X, Y, width_bytes, height, mode, data
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# 居中打印
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cmd = f"BITMAP {x_offset},{y_offset},{width_bytes},{target_height},0,".encode('utf-8')
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uart.write(cmd)
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# TSPL BITMAP 指令
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# BITMAP x, y, width_bytes, height, mode, data
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# mode=0: 正常模式
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header = f"BITMAP {x_offset},{y_offset},{width_bytes},{height},0,".encode('utf-8')
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printer.uart.write(header)
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# 分段发送数据，防止串口缓冲区溢出
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chunk_size = 128
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for i in range(0, len(img_data), chunk_size):
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uart.write(img_data[i : i + chunk_size])
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for i in range(0, len(data), chunk_size):
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printer.uart.write(data[i : i + chunk_size])
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# 简单的流控，防止发送太快
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time.sleep(0.005)
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uart.write(b'\\r\\n')
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printer.uart.write(b'\r\n')
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# 5. 打印
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def print_raw_image_file(file_path, width, height):
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"""
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直接打印存储在文件系统中的原始位图数据 (.bin)
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该文件应包含预处理好的二进制像素数据 (1 bit per pixel)
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:param file_path: 文件路径
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:param width: 图片宽度 (dots)
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:param height: 图片高度 (dots)
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"""
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try:
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with open(file_path, 'rb') as f:
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data = f.read()
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except OSError:
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print(f"错误: 无法打开文件 {file_path}")
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return
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# 初始化打印机
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uart = UART(1, baudrate=115200, tx=ttl_tx, rx=ttl_rx)
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printer = TsplPrinter(uart)
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print("=== 开始打印图片 ===")
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# 基础设置
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printer.cls()
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printer.size(48, 30) # 默认 48x30mm
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printer.gap(2, 0)
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# 计算居中位置 (假设标签纸最大宽度 384 dots, 高度 240 dots)
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MAX_WIDTH = 384
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MAX_HEIGHT = 240
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x_offset = (MAX_WIDTH - width) // 2
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y_offset = (MAX_HEIGHT - height) // 2
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if x_offset < 0: x_offset = 0
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if y_offset < 0: y_offset = 0
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print(f"正在发送图片数据 ({len(data)} bytes)...")
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print_bitmap(printer, data, width, height, x_offset, y_offset)
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# 打印出纸
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printer.print_out(1)
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print("打印完成")
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# 示例用法
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if __name__ == "__main__":
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try:
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print_image()
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except Exception as e:
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print(f"错误: {{e}}")
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'''
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with open(output_py_path, 'w', encoding='utf-8') as f:
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f.write(script_content)
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print(f"成功生成 MicroPython 脚本: {output_py_path}")
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if __name__ == "__main__":
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generate_micropython_printer_script(
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"/Users/jeremygan/Desktop/python_dev/V2_micropython/test_image.png",
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"/Users/jeremygan/Desktop/python_dev/V2_micropython/printer_image_print.py"
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)
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# 假设有一个预处理好的 384x240 的二进制文件
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# print_raw_image_file("image_data.bin", 384, 240)
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pass
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@@ -1,27 +0,0 @@
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from PIL import Image, ImageDraw
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# Create a test image with gray lines
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img = Image.new('L', (100, 100), color=255)
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d = ImageDraw.Draw(img)
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d.line([10, 10, 90, 90], fill=128, width=2) # Gray line
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d.line([10, 90, 90, 10], fill=0, width=2) # Black line
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# Convert with default dithering
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img1 = img.convert('1')
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zeros1 = 0
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for y in range(100):
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for x in range(100):
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if img1.getpixel((x, y)) == 0: zeros1 += 1
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print(f"Default dither zeros: {zeros1}")
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# Convert with NO dithering (Threshold)
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# Note: convert('1', dither=Image.Dither.NONE) might still do dithering in some versions?
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# The reliable way to threshold is point operation or custom threshold.
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# But let's check convert('1', dither=0)
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img2 = img.convert('1', dither=Image.Dither.NONE)
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zeros2 = 0
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for y in range(100):
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for x in range(100):
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if img2.getpixel((x, y)) == 0: zeros2 += 1
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print(f"No dither zeros: {zeros2}")
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69
debug_img.py
69
debug_img.py
@@ -1,69 +0,0 @@
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from PIL import Image
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import os
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def debug_image(image_path):
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if not os.path.exists(image_path):
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print(f"Error: {image_path} not found")
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return
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img = Image.open(image_path)
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print(f"Original mode: {img.mode}")
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# 模拟 convert_img.py 的处理流程
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if img.mode in ('RGBA', 'LA') or (img.mode == 'P' and 'transparency' in img.info):
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alpha = img.convert('RGBA').split()[-1]
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bg = Image.new("RGBA", img.size, (255, 255, 255, 255))
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bg.paste(img, mask=alpha)
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img = bg
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img = img.convert('L')
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img = img.convert('1')
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print(f"Converted mode: {img.mode}")
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width, height = img.size
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print(f"Size: {width}x{height}")
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zeros = 0
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non_zeros = 0
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values = {}
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# 采样一些像素
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for y in range(min(height, 10)):
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row_vals = []
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for x in range(min(width, 10)):
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val = img.getpixel((x, y))
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row_vals.append(str(val))
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print(f"Row {y} first 10 pixels: {', '.join(row_vals)}")
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# 统计所有像素
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for y in range(height):
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for x in range(width):
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val = img.getpixel((x, y))
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if val == 0:
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zeros += 1
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else:
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non_zeros += 1
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if val not in values:
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values[val] = 0
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values[val] += 1
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print(f"Total pixels: {width*height}")
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print(f"Zeros (Black?): {zeros}")
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print(f"Non-zeros (White?): {non_zeros}")
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print(f"Non-zero values distribution: {values}")
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if __name__ == "__main__":
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# 尝试找一个存在的图片，或者创建一个
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img_path = "test_image.png"
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if not os.path.exists(img_path):
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# 创建一个简单的测试图片
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img = Image.new('RGB', (100, 100), color = 'white')
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# 画个黑框
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from PIL import ImageDraw
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d = ImageDraw.Draw(img)
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d.rectangle([10, 10, 90, 90], outline='black', fill='black')
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img.save("debug_test.png")
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img_path = "debug_test.png"
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print("Created debug_test.png")
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debug_image(img_path)
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@@ -57,10 +57,9 @@ def image_to_tspl_commands(image_path):
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# 逻辑修正:
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# 我们希望 黑色像素(0) -> 打印(1)
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# 白色像素(255) -> 不打印(0)
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# 使用 < 128 判定，增加容错性，防止像素值偏移
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should_print = False
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if pixel < 128: # Black or Dark Gray
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if pixel == 0: # Black
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should_print = True
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if should_print:
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@@ -427,39 +427,6 @@ async def handle_font_request(websocket, message_type, data):
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except Exception as e:
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print(f"Error handling font request: {e}")
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class LockedWebSocket:
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"""
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WebSocket wrapper with a lock to prevent concurrent write operations.
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The websockets library (legacy protocol) does not support concurrent writes,
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which can lead to 'AssertionError: assert waiter is None' when multiple tasks
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try to send data simultaneously.
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"""
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def __init__(self, websocket: WebSocket):
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self.websocket = websocket
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self.lock = asyncio.Lock()
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async def accept(self):
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await self.websocket.accept()
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async def receive(self):
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return await self.websocket.receive()
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async def send_text(self, data: str):
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async with self.lock:
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await self.websocket.send_text(data)
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async def send_bytes(self, data: bytes):
|
||||
async with self.lock:
|
||||
await self.websocket.send_bytes(data)
|
||||
|
||||
async def send_json(self, data):
|
||||
async with self.lock:
|
||||
await self.websocket.send_json(data)
|
||||
|
||||
async def close(self, code=1000):
|
||||
async with self.lock:
|
||||
await self.websocket.close(code)
|
||||
|
||||
class MyRecognitionCallback(RecognitionCallback):
|
||||
def __init__(self, websocket: WebSocket, loop: asyncio.AbstractEventLoop):
|
||||
self.websocket = websocket
|
||||
@@ -569,8 +536,8 @@ def optimize_prompt(asr_text, progress_callback=None):
|
||||
1. 风格必须是：简单的黑白线稿、简笔画、图标风格 (Line art, Sketch, Icon style)。
|
||||
2. 画面必须清晰、线条粗壮，适合低分辨率热敏打印机打印。
|
||||
3. 绝对不要有复杂的阴影、渐变、黑白线条描述。
|
||||
4. 背景必须是纯白 (White background)，线条要粗方便打印。
|
||||
5. 提示词内容请使用英文描述，因为绘图模型对英文理解更好，但在描述中强调 "black and white line art", "bold simple lines", "vector style"。
|
||||
4. 背景必须是纯白 (White background)。
|
||||
5. 提示词内容请使用英文描述，因为绘图模型对英文理解更好，但在描述中强调 "black and white line art", "simple lines", "vector style"。
|
||||
6. 尺寸比例遵循宽48mm:高30mm (约 1.6:1)。
|
||||
7. 直接输出优化后的提示词，不要包含任何解释。"""
|
||||
|
||||
@@ -709,17 +676,8 @@ def generate_image(prompt, progress_callback=None, retry_count=0, max_retries=2)
|
||||
from PIL import Image
|
||||
img = Image.open(GENERATED_IMAGE_FILE)
|
||||
|
||||
# 缩小到THUMB_SIZE x THUMB_SIZE，保持比例并居中（防止拉伸）
|
||||
img.thumbnail((THUMB_SIZE, THUMB_SIZE), Image.LANCZOS)
|
||||
|
||||
# 创建黑色背景 (240x240)
|
||||
bg = Image.new("RGB", (THUMB_SIZE, THUMB_SIZE), (0, 0, 0))
|
||||
|
||||
# 计算居中位置
|
||||
left = (THUMB_SIZE - img.width) // 2
|
||||
top = (THUMB_SIZE - img.height) // 2
|
||||
bg.paste(img, (left, top))
|
||||
img = bg
|
||||
# 缩小到THUMB_SIZE x THUMB_SIZE
|
||||
img = img.resize((THUMB_SIZE, THUMB_SIZE), Image.LANCZOS)
|
||||
|
||||
# 转换为RGB565格式的原始数据
|
||||
# 每个像素2字节 (R5 G6 B5)
|
||||
@@ -791,8 +749,6 @@ def generate_image(prompt, progress_callback=None, retry_count=0, max_retries=2)
|
||||
|
||||
@app.websocket("/ws/audio")
|
||||
async def websocket_endpoint(websocket: WebSocket):
|
||||
# 使用 LockedWebSocket 包装原始 websocket 以防止并发写入冲突
|
||||
websocket = LockedWebSocket(websocket)
|
||||
global audio_buffer
|
||||
await websocket.accept()
|
||||
print("Client connected")
|
||||
@@ -1025,5 +981,4 @@ if __name__ == "__main__":
|
||||
local_ip = socket.gethostbyname(hostname)
|
||||
print(f"Server running on ws://{local_ip}:8000/ws/audio")
|
||||
|
||||
# 禁用自动Ping以避免并发写入冲突 (ws_ping_interval=None)
|
||||
uvicorn.run(app, host="0.0.0.0", port=8000, ws_ping_interval=None, ws_ping_timeout=None)
|
||||
uvicorn.run(app, host="0.0.0.0", port=8000)
|
||||
|
||||
Reference in New Issue
Block a user