changes

freetype:字库引擎,执行程序,用于安装 2.3.5

      with `FT_Get_WinFNT_Header' to get the WinFNT charset ID.

    - The descender metrics (face->size->metrics.descender) for WinFNT
      bitmap fonts had the wrong sign.

    - The (emulated) `seac' support for CFF fonts was broken.

    - The `flex' operator didn't work for CFF fonts.

    - PS glyphs  which  use  the   `hintmask'  operator  haven't  been
      rendered correctly in some cases.

    - Metrics for BDF and PCF bitmap font formats have been fixed.

    - Autohinting  is now  disabled for  glyphs  which  are vertically
      distorted  or mirrored  (using a  transformation matrix).   This
      fixes a bug which produced zero-height glyphs.

    - The   `freetype-config'   script   now  handles   --prefix   and
      --exec-prefix correctly; it also  returns the proper --rpath (or
      -R) value if FreeType has been built as a shared library.


  II. IMPORTANT CHANGES

    - Both  PCF  and BDF  drivers  now  handle  the SETWIDTH_NAME  and
      ADD_STYLE_NAME    properties.     Values    are   appended    to
      face->style_name; example: `Bold SemiCondensed'.

    - The PCF driver now handles bitmap  fonts compressed with the LZW
      algorithm (extension .pcf.Z, compressed with `compress').

    - A  new  API   function  `FT_Get_CMap_Language_ID'  (declared  in
      `tttables.h')  is  available  to   get  the  language  ID  of  a
      TrueType/SFNT cmap.

    - The hexadecimal format of  data after the `StartData' command in
      CID-keyed Type 1 fonts is now supported.  While this can't occur
      in  file-based   fonts,  it  can   happen  in  document-embedded
      resources of PostScript documents.

    - Embedded bitmaps in SFNT-based CFF fonts are now supported.

    - A simple  API is  now available  to control  FreeType's  tracing
      mechanism if compiled  with FT_DEBUG_LEVEL_TRACE.   See the file
      `ftdebug.h' for more details.

    - YAMATO Masatake contributed improved  handling of MacOS resource
      forks on non-MacOS platforms (for example, Linux can mount MacOS
      file systems).

    - Support for MacOS has been improved; there is now a new function
      `FT_New_Face_From_FSSpec'  similar to `FT_New_Face'  except that
      it accepts an FSSpec instead of a path.

    - The cache sub-system has been rewritten.

      - There is now support for deinstallation of faces.

      - A new  API function `FTC_Manager_RemoveFaceID'  has been added
        to  delete  all  `idle'  nodes  that  correspond  to  a  given
        FTC_FaceID.  All `locked' nodes  (i.e., those with a reference
        count > 0), will be modified to prevent them from appearing in
        further  lookups (they  will  be cleaned  normally when  their
        reference count reaches 0).

      - There  is  now  support  for point  scaling  (i.e.,  providing
        character sizes in points + dpis, instead of pixels).

      - Three abstract cache classes are now available:

          FTC_GCache:  Used to store  one glyph  item per  cache node,
                      with the ability to group common attributes into
                      `families'.      This    replaces     the    old
                      FTC_GlyphCache class.

          FTC_ICache: Used to store one FT_Glyph per cache node.  This
                      extends  FTC_GCache.  Family  definition, family
                      comparison, and  glyph loading are  however left
                      to sub-classes.

          FTC_SCache: Used to  store up to 16 small  bitmaps per cache
                      node.    This    extends   FTC_GCache.    Family
                      definition, family  comparison and glyph loading
                      are however left to sub-classes.

      - The file `src/cache/ftcbasic.c' implements:

          FTC_ImageCache: Extends    FTC_ICache;   implements   family
                          definitions and glyph loading similar to the
                          old API.

          FTC_SBitCache: Extends    FTC_SCache,    implements   family
                         definitions and glyph  loading similar to the
                         old API

        Client  applications  should  be  able to  extend  FTC_GCache,
        FTC_ICache, or FTC_SCache much more easily (i.e., less code to
        write, and  less callbacks).  For example,  one could envision
        caches  that are  capable of  storing  transformed (obliqued),
        stroked,   emboldened,   or   colored   glyph   images.    Use
        `ftcbasic.c' as an example.

      - All public  APIs are now  in `include/freetype/ftcache.h', (to
        be    accessed   as    `FT_CACHE_H').     The   contents    of
        `include/freetype/cache/' is only  needed by applications that
        wish to implement their own caches.

      - There were some major performance improvements through the use
        of  various programming  tricks.   Cache hits  are  up to  70%
        faster than in the old code.

      - The  FTC_CMapCache has  been simplified.  Charmaps can only be
        accessed by  index right now.  There  is also a  new API named
        `FT_Charmap_GetIndex' for this purpose.

      - The  demo programs  have been  updated to  the new  code.  The
        previous versions will not work with the current one.

      - Using  an invalid face  index in FT_Open_Face and friends  now
        causes an error even if the font contains a single face only.


  III. MISCELLANEOUS

    - Wolfgang Domröse contributed support files for building FreeType
      on the Atari using the PureC compiler.  Note that the Atari is a
      16bit platform.

    - Vitaliy Pasternak contributed project files for VS.NET 2003.


======================================================================

CHANGES BETWEEN 2.1.7 and 2.1.6

  I. IMPORTANT BUG FIXES

    - Updated  to newest  libtool  version, fixing  build problems  on
      various platforms.

    - On  Unix  platforms,  `make  install' didn't  copy  the  correct
      `ftconfig.h' file.

  Note that version 2.1.7  contains the same library  C source code as
  version 2.1.6.


======================================================================

CHANGES BETWEEN 2.1.6 and 2.1.5

  I. IMPORTANT BUG FIXES

    - The PFR  font driver didn't  load kerning tables  correctly, and
      the functions in FT_PFR_H didn't work at all.

    - Type 1 font  files in  binary format  (PFB) with  an end-of-file
      indicator weren't accepted by the FreeType engine.

    - Fonts which contain /PaintType  and /StrokeWidth no longer cause
      a segfault.  This bug has been introduced in version 2.1.5.

    - Fonts  loaded  with   FT_LOAD_RENDER  no  longer  cause  strange
      results.  This bug has been introduced in version 2.1.5.

    - Some  Windows   (bitmap)  FNT/FON  files   couldn't  be  handled
      correctly.


  II. IMPORTANT CHANGES

    - The internal  module API  has been heavily  changed in  favor of
      massive simplifications within the font engine.  This also means
      that authors of third-party modules must adapt their code to the
      new scheme.

      NOTE:  THE NEW SCHEME IS NOT COMPLETED YET.  PLEASE WAIT UNTIL A
      FINAL ANNOUNCEMENT!

    - The PostScript  parser has been enhanced to  handle comments and
      strings   correctly.   Additionally,   more  syntax   forms  are
      recognized.

    - Added the  optional unpatented hinting system  for TrueType.  It
      allows  typefaces which  need hinting  to produce  correct glyph
      forms (e.g., Chinese typefaces  from Dynalab) to work acceptably
      without infringing Apple patents.   This system is compiled only
      if  TT_CONFIG_OPTION_COMPILE_UNPATENTED_HINTING  is  defined  in
      ftoption.h (activated by default).


  III. MISCELLANEOUS

    - There  is now  a guard  in the  public header  files  to protect
      against inclusion of freetype.h from FreeType 1.

    - Direct inclusion of freetype.h  and other public header files no
      longer works.  You have to use the documented scheme

        #include <ft2build.h>
        #include FT_FREETYPE_H

      to load freetype.h with  a symbolic name.  This protects against
      renaming  of public  header  files (which  shouldn't happen  but
      actually  has, avoiding two  public header  files with  the same
      name).


======================================================================

CHANGES BETWEEN 2.1.5 and 2.1.4

  I. IMPORTANT BUG FIXES

    - Parsing the /CIDFontName field  now removes the leading slash to
      be in sync with other font drivers.

    - gzip support was buggy.  Some fonts could not be read.

    - Fonts which  have nested subglyphs  more than one level  deep no
      longer cause a segfault.

    - Creation of synthetic  cmaps for fonts in CFF  format was broken
      partially.

    - Numeric  font  dictionary entries  for  synthetic  fonts are  no
      longer overwritten.

    - The font matrix  wasn't applied to the advance  width for Type1,
      CID, and  CFF fonts.  This caused problems  when loading certain
      synthetic Type 1 fonts like `Helvetica Narrow'.

    - The test  for the charset registry  in BDF and PCF  fonts is now
      case-insensitive.

    - FT_Vector_Rotate  sometimes  returned   strange  values  due  to
      rounding errors.

    - The  PCF  driver  now  returns  the  correct  number  of  glyphs
      (including an artificial `notdef' glyph at index 0).

    - FreeType now  supports buggy CMaps  which are contained  in many
      CJK fonts from Dynalab.

    - Opening  an invalid  font  on a  Mac  caused a  segfault due  to
      double-freeing memory.

    - BDF  fonts  with  more   than  32768  glyphs  weren't  supported
      properly.


  II. IMPORTANT CHANGES

    - Accessing bitmap font formats has been synchronized.  To do that
      the FT_Bitmap_Size  structure has  been extended to  contain new
      fields `size', `x_ppem', and `y_ppem'.

    - The FNT driver now returns multiple faces, not multiple strikes.

    - The `psnames'  module has been  updated to the Adobe  Glyph List
      version 2.0.

    - The `psnames' module now understands `uXXXX[X[X]]' glyph names.

    - The algorithm for guessing the font style has been improved.

    - For fonts in SFNT format, root->height is no longer increased if
      the line gap  is zero.  There exist fonts  (containing e.g. form
      drawing  characters) which  intentionally have  a zero  line gap
      value.

    - ft_glyph_bbox_xxx  flags   are  now  deprecated   in  favour  of
      FT_GLYPH_BBOX_XXX.

    - ft_module_xxx   flags   are   now   deprecated  in   favour   of
      FT_MODULE_XXX.

    - FT_ENCODING_MS_{SJIS,GB2312,BIG5,WANSUNG,JOHAB}      are     now
      deprecated               in               favour              of
      FT_ENCODING_{SJIS,GB2312,GIB5,WANSONG,JOHAB}  -- those encodings
      are not specific to Microsoft.


  III. MISCELLANEOUS

    - The  autohinter  has been  further  improved;  for example,  `m'
      glyphs now retain its vertical symmetry.

    - Partial support of Mac fonts on non-Mac platforms.

    - `make   refdoc'   (after   first   `make')   builds   the   HTML
      documentation.  You need Python for this.

    - The make build system should  now work more reliably on DOS-like
      platforms.

    - Support for  EMX gcc  and Watson C/C++  compilers on  MS-DOS has
      been added.

    - Better VMS build support.

    - Support for the pkg-config  package by providing a `freetype.pc'
      file.

    - New configure option --with-old-mac-fonts for Darwin.

    - Some source files have been  renamed (mainly to fit into the 8.3
      naming scheme).


======================================================================

CHANGES BETWEEN 2.1.4 and 2.1.3

  I. IMPORTANT BUG FIXES

    - Updated  to newest  libtool  version, fixing  build problems  on
      various platforms.

    - A fix  in the Gzip stream  reader: It couldn't  read certain .gz
      files properly due to a  small typo.  In certain cases, FreeType
      could  also loop  endlessly  when trying  to  load tiny  gzipped
      files.

    - The configure script now tries  to use the system-wide zlib when
      it  finds one  (instead of  the  copy found  in src/gzip).   And
      `freetype-config' has  been updated to return  relevant flags in
      this case when invoked with `--libs' (e.g. `-lzlib').

    - Certain fonts couldn't be loaded  by 2.1.3 because they lacked a
      Unicode   charmap  (e.g.   SYMBOL.TTF).    FreeType  erroneously
      rejected them.