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fontforge script adding opentype mark feature & Anchor placement for Arabic letters completely automatic


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AutoMark-V 01(beta3)


AutoMark is a Fontforge script designed to simplify the process of adding OpenType mark features(mark to base, mark to ligature, and mark to mark), and placing anchors for Arabic glyphs (on marks, base glyphs, and ligatures). The script using codepoints(instead of glyph names) and even trying to bring a range of predictable non-Unicode glyphs by checking OpenType GSUB features such as ccmp, init, medi, fina, liga, and rlig. AutoMark's functionality is not realted to the number of a glyph's outline contours and/or components.

How It Works

AutoMark contains an in-built database for Arabic script codepoints, which includes preferences for anchor placements relative to glyph shape. Additionally, specific functions are included to calculate anchor placement in various glyph shapes. The database and functions are designed to be flexible and independent of glyph shape in varius typefaces.


Before running AutoMark:

  • Ensure the input font or Fontforge source file does not contain any mark or mkmk features and anchors. If it does contain advanced mark features or other mark types, they can still works with no interfering (like cursive attachments,etc).
  • Python and FontForge must be installed and accessible in the system's PATH.

To run AutoMark, use the following command(in the same directory of

fontforge -script input_font_path output_font_path

(you can use the input and output file name in the same directory of

Note: AutoMark is designed to prevent overwriting the input file; using the same name for input and output will not result in file overwriting(the output file name will give a '-AutoMark' suffix).


The script allows for the customization of parameters to fine-tune anchor placements within glyphs. run Automark -help to get more information.

Side Notes

Currently, the script does not have any dependencies outside of Python and FontForge. While there is no conscious effort to minimize dependencies, as a result, the script does not require a requirements.txt at the moment.


AutoMark is released under the MIT License. See the LICENSE file for more details.


fontforge script adding opentype mark feature & Anchor placement for Arabic letters completely automatic







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