FontTests

From IndLinux

This category of tests will test fonts thoroughly in the following aspects

• Script Coverage
• Glyph coverage
• Rendering levels
• Opentype functionality
• ...

Coverage Tests

• Unicode script range.
• Check characters covered in CMAP and defined in Unicode
• Check one-2-one mappings for CMAP & glyph IDs (ie a glyph is available for the character)
• Check coverage level with reference to the defined coverage map.
• Glyph coverage - wrt glyph reference maps defined.

Opentype tests

• OTF tables defined
• script tags
• Lang tags
• Feature tags
• Check for combinations under specific rules.

Modules

Modules for font tests. to be implemented as cmdline tools preferably.

Libraries to use - xlib, Freetype, fontconfig, m17n, libotf, pango, libqt, libgtk, fonttools (TTX)

Existing code: gfontview, xfontsel, fontconfig, pango.

• Font browser
  • modelled on gfontview
  • shows list of available fonts (through fontconfig/X/Xfs - selectable)
  • show statistics
  • glyph browser (like gfontview)

• Font statistics
  • Load a font and compute statistics
    • Names, style, weight, encodings.
    • Total chars covered
    • Total glyph count
    • Script enumeration
    • Tables supported
    • OTF tables
    • OTF script features
    • Total lookups per feature

• Render tests
  • Render pages of all glyphs in font
  • Render given text combinations (input from a text file) - output in a graphic form.
  • Render different combination forms (CV, CVM, CC, CCV, CCVM..etc) - input from a text file.

• OpenType tests