[ft-devel] new `warping' property for auto-hinter

[Werner LEMBERG]

>From the CHANGES file:

    - A new auto-hinter  property `warping' can switch on  and off the
      warping code  if this  experimental feature  is compiled  in (by
      defining the AF_CONFIG_OPTION_USE_WARPER configuration option).

      The AF_CONFIG_OPTION_USE_WARPER option itself is an old feature,
      available   since  2006.    Warping   only   works  in   `light'
      auto-hinting mode.   The idea of  the code is to  slightly scale
      and  shift a  glyph  along the  non-hinted  dimension (which  is
      usually the horizontal axis) so that as much of its segments are
      aligned  (more or  less) to  the grid.   To find  out a  glyph's
      optimal   scaling   and   shifting  value,   various   parameter
      combinations are tried and scored.

      See  file  `ftautoh.h' for  more;  the  demo programs  `ftdiff',
      `ftview', and `ftgrid' can toggle warping with key `w'.

Please test!


    Werner