319 lines
10 KiB
Python
319 lines
10 KiB
Python
import socket # .material -> .base refactor checked
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import base64
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import os
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from io import BytesIO
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from PIL import Image, ImageDraw, ImageFont
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# 引入二维码生成库
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try:
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import qrcode
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except ImportError:
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print("❌ 警告: 未安装 qrcode 库，无法生成二维码。请执行: pip install qrcode[pil]")
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class LabelPrintService:
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PRINTER_IP = "192.168.9.205"
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PRINTER_PORT = 9100
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# ================= 1. 尺寸与分辨率配置 (300 DPI) =================
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DOTS_PER_MM = 12 # 300 DPI
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LABEL_WIDTH_MM = 40
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LABEL_HEIGHT_MM = 30
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# 画布像素: 40mm -> 480px, 30mm -> 360px
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LABEL_WIDTH = int(LABEL_WIDTH_MM * DOTS_PER_MM)
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LABEL_HEIGHT = int(LABEL_HEIGHT_MM * DOTS_PER_MM)
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# ================= 2. 布局配置 =================
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MARGIN_LEFT = int(2 * DOTS_PER_MM) # 左边距 2mm
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MARGIN_RIGHT = int(1 * DOTS_PER_MM) # 右边距 1mm
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TOP_MARGIN = int(5 * DOTS_PER_MM) # 顶部边距 2mm
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# 二维码尺寸 15mm * 15mm
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QR_SIZE_MM = 15
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QR_SIZE_PX = int(QR_SIZE_MM * DOTS_PER_MM) # 180px
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# 左右分栏的间距
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GAP_COLUMNS = int(2 * DOTS_PER_MM) # 2mm 间距
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@staticmethod
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def _get_font(size):
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"""获取字体 (优先使用黑体/微软雅黑)"""
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font_names = ["simhei.ttf", "msyh.ttf", "SimHei.ttf", "arial.ttf", "NotoSansCJK-Regular.ttc"]
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base_dirs = [os.getcwd(), os.path.dirname(__file__), "/usr/share/fonts", "C:\\Windows\\Fonts"]
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for d in base_dirs:
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for name in font_names:
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path = os.path.join(d, name)
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if os.path.exists(path):
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try:
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return ImageFont.truetype(path, size)
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except:
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continue
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return ImageFont.load_default()
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@staticmethod
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def _generate_qr_image(content, size_px):
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"""生成指定像素大小的二维码"""
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try:
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if not content: content = "000000"
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# 创建二维码对象
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qr = qrcode.QRCode(
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version=1,
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error_correction=qrcode.constants.ERROR_CORRECT_M,
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box_size=10,
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border=0,
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)
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qr.add_data(content)
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qr.make(fit=True)
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img = qr.make_image(fill_color="black", back_color="white")
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# [重要] 必须转为 RGB 模式
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img = img.convert('RGB')
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# 调整为指定像素大小
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return img.resize((size_px, size_px), Image.Resampling.LANCZOS)
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except Exception as e:
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print(f"二维码生成失败: {e}")
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return Image.new('RGB', (size_px, size_px), color='gray')
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@staticmethod
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def draw_text_wrap(draw, text, x, y, font, max_width, line_spacing=0, stroke_width=1):
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"""
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[核心功能] 自动换行绘制文本
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"""
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if not text:
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return y
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lines = []
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current_line = ""
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# 计算折行
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for char in text:
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test_line = current_line + char
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width = font.getlength(test_line)
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if width <= max_width:
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current_line = test_line
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else:
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if current_line: lines.append(current_line)
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current_line = char
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if current_line:
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lines.append(current_line)
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# 绘制
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current_y = y
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font_height = font.size
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for line in lines:
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if current_y + font_height > LabelPrintService.LABEL_HEIGHT:
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break
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draw.text(
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(x, current_y),
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line,
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font=font,
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fill='black',
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stroke_width=stroke_width, # 支持动态调整粗细
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stroke_fill='black'
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)
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current_y += font_height + line_spacing
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return current_y
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@staticmethod
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def _create_image_object(data):
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"""
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[绘图层] 生成标签图片
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新布局逻辑：
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---------------------------------------
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| [QR Code] (15mm) | 名: XXXXXX |
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| | 规: XXXXXX |
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| SKU: XXXXX(大/粗)| 属: XXXXXX |
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| 库: XXXXX (中/粗)| SN: XXXXXX |
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---------------------------------------
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"""
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# 1. 创建画布
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img = Image.new('RGB', (LabelPrintService.LABEL_WIDTH, LabelPrintService.LABEL_HEIGHT), color='white')
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d = ImageDraw.Draw(img)
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# 2. 字体配置 (字号再次加大)
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# [修改] 通用字体加大到 28
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font_text = LabelPrintService._get_font(28)
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# [修改] SKU字体加大到 34 (特大)
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font_sku = LabelPrintService._get_font(34)
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# 3. 数据准备
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sku_code = str(data.get('sku') or data.get('serial_number') or '000000')
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name = str(data.get('material_name', '') or '-')
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spec = str(data.get('spec_model', '') or '-')
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loc = str(data.get('warehouse_loc', '') or '-')
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cat = str(data.get('category', '') or '')
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typ = str(data.get('material_type', '') or '')
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attr = f"{cat}/{typ}" if (cat or typ) else "-"
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# 底部编号逻辑
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bottom_val = ""
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bottom_label = "NO"
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if data.get('print_no'):
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bottom_val = str(data.get('print_no'))
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l_type = data.get('print_label', '')
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bottom_label = 'SN' if l_type == '序' else 'BN' if l_type == '批' else 'NO'
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elif data.get('serial_number'):
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bottom_label = "SN"
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bottom_val = str(data.get('serial_number'))
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elif data.get('batch_number'):
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bottom_label = "BN"
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bottom_val = str(data.get('batch_number'))
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else:
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bottom_val = sku_code
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bottom_text_full = f"{bottom_label}:{bottom_val}"
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# ==================== 绘制区域划分 ====================
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# --- A. 左侧区域 (二维码 + SKU + 库位) ---
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qr_x = LabelPrintService.MARGIN_LEFT
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qr_y = LabelPrintService.TOP_MARGIN
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# 1. 绘制二维码
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qr_img = LabelPrintService._generate_qr_image(sku_code, LabelPrintService.QR_SIZE_PX)
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img.paste(qr_img, (qr_x, qr_y))
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# 计算中心点，用于 SKU 和 库位 居中
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qr_center_x = qr_x + (LabelPrintService.QR_SIZE_PX // 2)
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# 2. 绘制 SKU (特大 + 特粗)
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# 位于二维码下方，留 6px 间距
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current_left_y = qr_y + LabelPrintService.QR_SIZE_PX + 6
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sku_w = font_sku.getlength(sku_code)
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sku_x = int(qr_center_x - (sku_w // 2))
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if sku_x < 2: sku_x = 2 # 边界保护
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d.text(
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(sku_x, current_left_y),
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sku_code,
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font=font_sku,
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fill='black',
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stroke_width=2, # [修改] SKU 增加到 2px 描边，更粗
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stroke_fill='black'
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)
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# 3. 绘制 库位 (放在 SKU 下方)
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# 位于 SKU 下方，留 6px 间距
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current_left_y += 34 + 6 # 34是字号大致高度
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loc_text = f"库:{loc}"
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loc_w = font_text.getlength(loc_text)
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loc_x = int(qr_center_x - (loc_w // 2))
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if loc_x < 2: loc_x = 2
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d.text(
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(loc_x, current_left_y),
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loc_text,
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font=font_text,
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fill='black',
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stroke_width=1, # 普通加粗
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stroke_fill='black'
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)
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# --- B. 右侧区域 (名称、规格、属性、编号) ---
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# 右侧起始 X
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right_start_x = LabelPrintService.MARGIN_LEFT + LabelPrintService.QR_SIZE_PX + LabelPrintService.GAP_COLUMNS
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# 右侧最大宽度
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right_max_width = LabelPrintService.LABEL_WIDTH - right_start_x - LabelPrintService.MARGIN_RIGHT
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current_right_y = LabelPrintService.TOP_MARGIN
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# [修改] 增大行间距 line_spacing=8
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LINE_SPACING = 8
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# 1. 名称
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current_right_y = LabelPrintService.draw_text_wrap(
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d, f"名:{name}", right_start_x, current_right_y, font_text, right_max_width, line_spacing=LINE_SPACING
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)
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current_right_y += LINE_SPACING
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# 2. 规格
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current_right_y = LabelPrintService.draw_text_wrap(
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d, f"规:{spec}", right_start_x, current_right_y, font_text, right_max_width, line_spacing=LINE_SPACING
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)
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current_right_y += LINE_SPACING
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# 3. 属性
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current_right_y = LabelPrintService.draw_text_wrap(
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d, f"属:{attr}", right_start_x, current_right_y, font_text, right_max_width, line_spacing=LINE_SPACING
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)
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current_right_y += LINE_SPACING
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# 4. 序列号/批号
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LabelPrintService.draw_text_wrap(
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d, bottom_text_full, right_start_x, current_right_y, font_text, right_max_width, line_spacing=LINE_SPACING
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)
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return img
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@staticmethod
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def generate_preview_image(data):
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"""生成 Base64 预览图"""
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img = LabelPrintService._create_image_object(data)
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output_buffer = BytesIO()
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img.save(output_buffer, format='JPEG', quality=95)
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base64_str = base64.b64encode(output_buffer.getvalue()).decode('utf-8')
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return f"data:image/jpeg;base64,{base64_str}"
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@staticmethod
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def send_to_printer(data):
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ip = LabelPrintService.PRINTER_IP
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port = LabelPrintService.PRINTER_PORT
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try:
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# 1. 获取 RGB 图像
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img_rgb = LabelPrintService._create_image_object(data)
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# 2. 转换为灰度
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img_gray = img_rgb.convert('L')
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# 3. 二值化处理
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img_bw = img_gray.point(lambda x: 0 if x < 128 else 255, '1')
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# 4. 生成打印指令
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bitmap_data = img_bw.tobytes()
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width_bytes = (img_bw.width + 7) // 8
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height_dots = img_bw.height
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# TSPL 协议头
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header = (
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f"SIZE {LabelPrintService.LABEL_WIDTH_MM} mm, {LabelPrintService.LABEL_HEIGHT_MM} mm\r\n"
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"GAP 2 mm, 0 mm\r\n"
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"CLS\r\n"
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"DIRECTION 1\r\n"
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"REFERENCE 0, 0\r\n"
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).encode('gbk')
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# 位图指令
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bitmap_cmd = f"BITMAP 0,0,{width_bytes},{height_dots},0,".encode('gbk')
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footer = b"\r\nPRINT 1,1\r\n"
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# 5. 发送 socket
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s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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s.settimeout(5)
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s.connect((ip, port))
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s.sendall(header + bitmap_cmd + bitmap_data + footer)
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s.close()
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return True
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except Exception as e:
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print(f"❌ 打印异常: {e}")
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raise Exception(f"打印机连接失败: {str(e)}")
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if __name__ == "__main__":
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pass
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