254 lines
8.9 KiB
Python
254 lines
8.9 KiB
Python
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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"""
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鸿蒙字体压缩工具
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使用 fonttools 库压缩 TTF 字体文件，减小文件大小
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"""
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import os
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import sys
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import subprocess
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import shutil
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from pathlib import Path
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from typing import List, Tuple
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def check_dependencies():
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"""检查必要的依赖是否已安装"""
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missing_packages = []
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# 检查 fonttools
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try:
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import fontTools
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except ImportError:
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missing_packages.append('fonttools')
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# 检查 brotli
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try:
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import brotli
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except ImportError:
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missing_packages.append('brotli')
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# 检查 pyftsubset 命令是否可用
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try:
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result = subprocess.run(['pyftsubset', '--help'], capture_output=True, text=True)
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if result.returncode != 0:
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missing_packages.append('fonttools[subset]')
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except FileNotFoundError:
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if 'fonttools' not in missing_packages:
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missing_packages.append('fonttools[subset]')
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if missing_packages:
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print(f"缺少必要的依赖包: {', '.join(missing_packages)}")
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print("请运行以下命令安装:")
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print(f"pip install {' '.join(missing_packages)}")
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return False
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return True
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def get_file_size(file_path: str) -> int:
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"""获取文件大小（字节）"""
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return os.path.getsize(file_path)
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def format_file_size(size_bytes: int) -> str:
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"""格式化文件大小显示"""
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if size_bytes < 1024:
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return f"{size_bytes} B"
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elif size_bytes < 1024 * 1024:
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return f"{size_bytes / 1024:.2f} KB"
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else:
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return f"{size_bytes / (1024 * 1024):.2f} MB"
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def compress_font(input_path: str, output_path: str, compression_level: str = "basic") -> bool:
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"""
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压缩单个字体文件
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Args:
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input_path: 输入字体文件路径
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output_path: 输出字体文件路径
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compression_level: 压缩级别 ("basic", "medium", "aggressive")
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Returns:
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bool: 压缩是否成功
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"""
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try:
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# 基础压缩参数
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base_args = [
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"pyftsubset", input_path,
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"--output-file=" + output_path,
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"--flavor=woff2", # 输出为 WOFF2 格式，压缩率更高
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"--with-zopfli", # 使用 Zopfli 算法进一步压缩
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]
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# 根据压缩级别设置不同的参数
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if compression_level == "basic":
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# 基础压缩：保留常用字符和功能
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args = base_args + [
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"--unicodes=U+0020-007F,U+00A0-00FF,U+2000-206F,U+2070-209F,U+20A0-20CF", # 基本拉丁字符、标点符号等
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"--layout-features=*", # 保留所有布局特性
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"--glyph-names", # 保留字形名称
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"--symbol-cmap", # 保留符号映射
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"--legacy-cmap", # 保留传统字符映射
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"--notdef-glyph", # 保留 .notdef 字形
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"--recommended-glyphs", # 保留推荐字形
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"--name-IDs=*", # 保留所有名称ID
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"--name-legacy", # 保留传统名称
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]
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elif compression_level == "medium":
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# 中等压缩：移除一些不常用的功能
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args = base_args + [
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"--unicodes=U+0020-007F,U+00A0-00FF,U+2000-206F", # 减少字符范围
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"--layout-features=kern,liga,clig", # 只保留关键布局特性
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"--no-glyph-names", # 移除字形名称
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"--notdef-glyph",
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"--name-IDs=1,2,3,4,5,6", # 只保留基本名称ID
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]
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else: # aggressive
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# 激进压缩：最大程度减小文件大小
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args = base_args + [
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"--unicodes=U+0020-007F", # 只保留基本ASCII字符
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"--no-layout-features", # 移除所有布局特性
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"--no-glyph-names", # 移除字形名称
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"--no-symbol-cmap", # 移除符号映射
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"--no-legacy-cmap", # 移除传统映射
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"--notdef-glyph",
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"--name-IDs=1,2", # 只保留最基本的名称
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"--desubroutinize", # 去子程序化（可能减小CFF字体大小）
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]
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# 执行压缩命令
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result = subprocess.run(args, capture_output=True, text=True)
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if result.returncode == 0:
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return True
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else:
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print(f"压缩失败: {result.stderr}")
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return False
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except Exception as e:
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print(f"压缩过程中出现错误: {str(e)}")
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return False
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def find_font_files(directory: str) -> List[str]:
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"""查找目录中的所有字体文件"""
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font_extensions = ['.ttf', '.otf', '.woff', '.woff2']
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font_files = []
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for root, dirs, files in os.walk(directory):
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for file in files:
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if any(file.lower().endswith(ext) for ext in font_extensions):
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font_files.append(os.path.join(root, file))
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return font_files
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def compress_fonts_batch(font_directory: str, compression_level: str = "basic"):
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"""
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批量压缩字体文件
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Args:
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font_directory: 字体文件目录
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compression_level: 压缩级别
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"""
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if not os.path.exists(font_directory):
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print(f"错误: 目录 {font_directory} 不存在")
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return
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# 查找所有字体文件
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font_files = find_font_files(font_directory)
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if not font_files:
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print("未找到字体文件")
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return
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print(f"找到 {len(font_files)} 个字体文件")
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print(f"压缩级别: {compression_level}")
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print(f"压缩后的文件将与源文件放在同一目录，扩展名为 .woff2")
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print("-" * 60)
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total_original_size = 0
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total_compressed_size = 0
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successful_compressions = 0
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for i, font_file in enumerate(font_files, 1):
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print(f"[{i}/{len(font_files)}] 处理: {os.path.basename(font_file)}")
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# 获取原始文件大小
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original_size = get_file_size(font_file)
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total_original_size += original_size
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# 生成输出文件名（保持原文件名，只改变扩展名）
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file_dir = os.path.dirname(font_file)
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base_name = os.path.splitext(os.path.basename(font_file))[0]
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output_file = os.path.join(file_dir, f"{base_name}.woff2")
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# 压缩字体
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if compress_font(font_file, output_file, compression_level):
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if os.path.exists(output_file):
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compressed_size = get_file_size(output_file)
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total_compressed_size += compressed_size
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successful_compressions += 1
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# 计算压缩率
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compression_ratio = (1 - compressed_size / original_size) * 100
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print(f" ✓ 成功: {format_file_size(original_size)} → {format_file_size(compressed_size)} "
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f"(压缩 {compression_ratio:.1f}%)")
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else:
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print(f" ✗ 失败: 输出文件未生成")
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else:
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print(f" ✗ 失败: 压缩过程出错")
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print()
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# 显示总结
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print("=" * 60)
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print("压缩完成!")
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print(f"成功压缩: {successful_compressions}/{len(font_files)} 个文件")
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if successful_compressions > 0:
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total_compression_ratio = (1 - total_compressed_size / total_original_size) * 100
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print(f"总大小: {format_file_size(total_original_size)} → {format_file_size(total_compressed_size)}")
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print(f"总压缩率: {total_compression_ratio:.1f}%")
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print(f"节省空间: {format_file_size(total_original_size - total_compressed_size)}")
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def main():
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"""主函数"""
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print("鸿蒙字体压缩工具")
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print("=" * 60)
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# 检查依赖
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if not check_dependencies():
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return
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# 获取当前脚本所在目录
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current_dir = os.path.dirname(os.path.abspath(__file__))
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# 设置默认字体目录
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font_directory = current_dir
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print(f"字体目录: {font_directory}")
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# 让用户选择压缩级别
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print("\n请选择压缩级别:")
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print("1. 基础压缩 (保留大部分功能，适合网页使用)")
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print("2. 中等压缩 (平衡文件大小和功能)")
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print("3. 激进压缩 (最小文件大小，可能影响显示效果)")
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while True:
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choice = input("\n请输入选择 (1-3): ").strip()
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if choice == "1":
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compression_level = "basic"
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break
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elif choice == "2":
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compression_level = "medium"
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break
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elif choice == "3":
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compression_level = "aggressive"
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break
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else:
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print("无效选择，请输入 1、2 或 3")
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# 开始批量压缩
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compress_fonts_batch(font_directory, compression_level=compression_level)
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if __name__ == "__main__":
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main() |