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Editorial Team
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Asked: 2026-06-12T14:56:19+00:00

I am trying to create a font/glyph by: taking a bitmap image creating an

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I am trying to create a font/glyph by:

  • taking a bitmap image
  • creating an SVG with autotrace (on Linux)
  • importing the outline as a glyph with python-fontforge (glyph.importOutlines(svgfile) )

This works fine except that the resulting glyph in inverted (see images). Any idea how this can be prevented, how the SVG or glyph can be inverted, or anything like that?

Source bitmap:
source bitmap

Autotraced SVG:
enter image description here

Resulting font:
enter image description here

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1 Answer

  1. Editorial Team

    solved this simply by using potrace instead of autotrace.

    for reference, these are the steps:

    convert bitmap to svg (linux command line):

    potrace -s sourceimg.bmp

    use svg as glyph (python):

    import fontforge
font = fontforge.open('blank.sfd')
glyph = font.createMappedChar('A')
glyph.importOutlines('sourceimg.svg')
font.generate('testfont.ttf')

    That’s it, result below for use on a website:

    css:

    @font-face
{
font-family: testfont;
src: url('testfont.ttf');
}

    html:

    <span style="font-family:testfont; font-weight:normal; color:green;">A</span>
<span style="font-family:testfont; font-weight:bold; color:green;">A</span>

    enter image description here

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