bug (gradio-pdf): preview not displaying CJK characters

[tastelikefeet]

问题描述

请对问题进行描述，并提供日志或截图
请确认 issues 中没有相同问题且完整阅读 wiki
本项目不处理网络环境引发的问题（例如 empty translation result/connection reset/check_hostname requires server_hostname/certificate verify failed/unable to connect to proxy/LocalEntryNotFoundError）

测试文档

Important

请提供用于复现测试的 PDF 文档

1. gradio翻译完成后预览效果不正常

2. gradio在国内如果选择连接不通的translater会等待很长时间，影响使用，建议增加并发或者减少retry

[hellofinch]

gradio翻译完成后预览效果不正常是因为没有获取到cmap的文件，可能需要向上游gradio-pdf反馈。

[awwaawwa]

第二点我写 #216 (comment) 的时候看看

[reycn]

If necessary, rollback to my image preview, lol

[Byaidu]

其实还好，这个文字显示也不是大问题

[Issues-translate-bot]

The issue has been automatically translated into English.

---

Actually, it’s okay. The text display isn’t a big problem either.

[reycn]

The bug in upstream has been fixed at in its PR#34, which has been released as v0.0.21.

I am working on it.

[reycn]

This bug has been fixed in CMT#b9ae66bd59fde45d3b52d499611cda4b5fb83466.

With the following different results before & after the present fix:

• Before, gradio-pdf<0.0..21

• After, gradio-pdf>0.0.21