eBookReaderSwitch/docs/examples/fix-s22pdf.js

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JavaScript
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// A simple script to fix the broken fonts in PDF files generated by S22PDF.
if (scriptArgs.length != 2) {
print("usage: mutool run fix-s22pdf.js input.pdf output.pdf");
quit();
}
var doc = new PDFDocument(scriptArgs[0]);
var font = new Font("zh-Hans");
var song = doc.addCJKFont(font, "zh-Hans", "H", "serif");
var heiti = doc.addCJKFont(font, "zh-Hans", "H", "sans-serif");
song.Encoding = 'GBK-EUC-H';
heiti.Encoding = 'GBK-EUC-H';
var MAP = {
"/#CB#CE#CC#E5": song, // SimSun
"/#BA#DA#CC#E5": heiti, // SimHei
"/#BF#AC#CC#E5_GB2312": song, // SimKai
"/#B7#C2#CB#CE_GB2312": heiti, // SimFang
"/#C1#A5#CA#E9": song, // SimLi
}
var i, n = doc.countPages();
for (i = 0; i < n; ++i) {
var fonts = doc.findPage(i).Resources.Font;
fonts.forEach(function (name, font) {
if (font.BaseFont in MAP && font.Encoding == 'WinAnsiEncoding')
fonts[name] = MAP[font.BaseFont];
});
}
doc.save(scriptArgs[1]);