[gbm]

Originally Posted by Dfaure

That's fair.

I just wanted to use the calibre viewer in the same way I could do with a physical e-book reader.

Thanks to the user stylesheet parameter I can specify my own fonts for the ebook rendering, but these should be registered in the hosting system.

How could I do that without being obliged to install fonts on each computer I could use?

Open the e-book viewer go to "preferences" then "User_stylesheet" then use the following code with your font.

body {
  font-family: "MyFont", serif;
}
@font-face {
  font-family : MyFont;
  font-weight : normal;
  font-style: normal;
  src : url(MyFont.otf);

@font-face {
  font-family : MyFontBold;
  font-weight : bold;
  font-style: normal;
  src : url(MyFontBold.otf);
}
@font-face {
  font-family : MyFontItalic;
  font-weight : normal;
  font-style: italic;
  src : url(MyFontItalic.otf);
}
@font-face {
  font-family : MyFontBoldItalic;
  font-weight : normal;
  font-style: BoldItalic;
  src : url(MyFontBoldItalic.otf);
}

Replace the Myfont... with the name and path of the font you are using.

example src : url(...\calibre\resources\fonts\MyFontBoldItalic.o tf)

Copy the font you would like to use into the font folder of the calibre portable.

That should work do not have a calibre portable to test.

bernie