ftlint - simple font tester

ftlint  opens  the given font(s), loads and renders glyphs at the given ppem value.  The shape complexity
       of outline glyphs are examined based on their taxicab perimeters: the higher the number, the more complex
       the shape.  For successfully rendered glyphs, it  calculates  the  bitmap  MD5  checksum  for  regression
       testing  as  well  as  horizontal (X) and vertical (Y) acutances for quality assessment.  The acutance is
       equal to 2.0 for monochrome bitmap fonts and approaches this value for hinted anti-aliased fonts.

       ppem   Size in pixels per EM.

       font   The font file(s) to test.

       This program is part of the FreeType demos package.

       ftlint - simple font tester

-fL   Use hexadecimal (not decimal) number L defined by FT_LOAD_XXX flags (default is 0).

       -rN   Set render mode to N:
              0   normal
              1   light
              2   mono
              3   horizontal LCD
              4   vertical LCD

              which corresponds to the values of the FT_RENDER_MODE_XXX enumeration (default is 0).

       -iI-J Range of glyph indices to use (default: all).

       -q     Quiet mode without the rendering analysis.

FreeType 2.13.3                                    August 2024                                         FTLINT(1)

ftlint [options] ppemfont...