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[程序员] Word、PDF 文件在线预览是怎么实现的呀？快被折腾疯了

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要实现 word 、pdf 在线预览。

目前实现思路是 PDF 转图片，然后通过图片实现预览。

Word 的话，先转 PDF ，然后 PDF 再转图片。

感觉超级繁琐啊。

刚弄完 PDF 转图片，效果勉强能看，有的图片会莫名其妙地丢部分文字，报错：

Can't find CID font "????". Attempting to substitute CID font /Adobe-GB1 for /????, see doc/Use.htm#CIDFontSubstitution. Loading a TT font from /usr/share/ghostscript/9.53.3/Resource/CIDFSubst/DroidSansFallback.ttf to emulate a CID font Adobe-GB1 ... Done.

猜测是字体丢失导致的。

看别人做的都挺好的，咋自己实现起来这么难呢。

有没有做过的大佬，一般是咋实现的。

word 转 PDF 咋转，现在还茫然中。

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