# Functions
颜色代码转换为RGB input int output int red, green, blue.
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获取所及字体.
随机生成浅色.
生成指定大小的随机数.
生成随机字体.
获取指定目录下的所有文件，不进入下一级目录搜索，可以匹配后缀过滤。.
添加一个字体路径到字体库.
# Constants
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验证码噪点强度.
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图片格式.
# Structs
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# Type aliases
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