[Poppler-bugs] [Bug 104144] New: Poppler does not fall back on other fonts properly

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=104144

            Bug ID: 104144
           Summary: Poppler does not fall back on other fonts properly
           Product: poppler
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: general
          Assignee: poppler-bugs at lists.freedesktop.org
          Reporter: niels_ole at salscheider-online.de

If poppler loads a font that does not contain the required glyphs it does not
fall back on another font. Instead it does not render anything.

I have this fontconfig configuration to make sure that all emojis are from Noto
Color Emoji:

<fontconfig>
  <match target="pattern">
    <edit name="family" mode="prepend_first">
      <string>Noto Color Emoji</string>
    </edit>
  </match>
</fontconfig>

When I now open a PDF file that uses for example ArialMT, fontconfig first
suggests a few NimbusSans variants. Poppler skips over these since they are .t1
fonts. The next font it finds is NotoColorEmoji.ttf which is loaded.
But it does not contain any glyphs, only the emojis.

The right thing to do would be to fall back to the next font. But instead
poppler stops here and does not render the text.

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