changes

freetype:字库引擎,执行程序,用于安装 2.3.5

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

CHANGES BETWEEN 2.1.0 and 2.0.9

  I. IMPORTANT BUG FIXES

    - The  TrueType bytecode  interpreter  has been  fixed to  produce
      _exactly_ the same output as FreeType 1.x.  Previous differences
      were due  to slightly distinct  fixed-point computation routines
      used to perform dot products and vector length measurements.

      It seems  that native TrueType hinting  is _extremely_ sensitive
      to  rounding errors.  The  required vector  computation routines
      have been optimized and placed within the `ttinterp.c' file.

    - Fixed the parsing of accelerator tables in the PCF font driver.

    - Fixed the Type1 glyph loader  routine used to compute the font's
      maximum advance width.


  II. NEW FEATURES

    - The `configure' script used on Unix systems has been modified to
      check  that  GNU  Make  is  being used  to  build  the  library.
      Otherwise,  it  will display  a  message  proposing  to use  the
      GNUMAKE environment variable to name it.

      The Unix-specific file README.UNX has been modified accordingly.


  III. MISCELLANEOUS

    - The  FreeType  License in  `docs/FTL.TXT'  has  been updated  to
      include  a  proposed preferred  disclaimer.   If  you are  using
      FreeType in your products, you are encouraged (but not mandated)
      to use the following text in your documentation:

      """
        Portions of this software are copyright © 1996-2002 The
        FreeType Project (www.freetype.org).  All rights reserved.
      """

    - The default size of the render pool has been reduced to 16kByte.
      This  shouldn't result  in any  noticeable  performance penalty,
      unless you are  using the engine as-is to  render very large and
      complex glyphs.

    - The  FreeType 2  redesign has  begun.  More  information  can be
      found at this URL:

        http://www.freetype.org/freetype2/redesign.html

      The following  internal changes  have been performed  within the
      sources of this release:

        - Many   internal  types   have  been   renamed   to  increase
          consistency.   The  following  should  be true,  except  for
          public types:

            * All structure  types have a name ending  in `Rec' (short
              for `record').

            * A  pointer-to-structure type  has the  same name  as the
              structure, _without_ the `Rec' suffix.

              Example:

                typedef struct FooRec_
                {
                  ...

                } FooRec, *Foo;

        - Many   internal  macros  have   been  renamed   to  increase
          consistency.  The following should be true:

            * All  macros  have a  name  beginning  with `FT_'.   This
              required a few changes like

                ALLOC   => FT_ALLOC
                FREE    => FT_FREE
                REALLOC => FT_REALLOC

            * All  macros are completely  UPPERCASE.  This  required a
              few changes like:

                READ_Short  => FT_READ_SHORT
                NEXT_Short  => FT_NEXT_SHORT
                GET_ULongLE => FT_GET_ULONG_LE
                MEM_Set     => FT_MEM_SET
                MEM_Copy    => FT_MEM_COPY
                etc.

            * Whenever   possible,   all   macro  names   follow   the
              FT_<OBJECT>_<METHOD> pattern.  For example

                ACCESS_Frame   => FT_FRAME_ENTER
                FORGET_Frame   => FT_FRAME_EXIT
                EXTRACT_Frame  => FT_FRAME_EXTRACT
                RELEASE_Frame  => FT_FRAME_RELEASE

                FILE_Pos       => FT_STREAM_POS
                FILE_Seek      => FT_STREAM_SEEK
                FILE_Read      => FT_STREAM_READ
                FILE_ReadAt    => FT_STREAM_READ_AT
                READ_Fields    => FT_STREAM_READ_FIELDS

        - Many  internal functions  have  been renamed  to follow  the
          FT_<Object>_<Method> pattern.  For example:

            FT_Seek_Stream       => FT_Stream_Seek
            FT_Read_Stream_At    => FT_Stream_ReadAt
            FT_Done_Stream       => FT_Stream_Close
            FT_New_Stream        => FT_Stream_Open
            FT_New_Memory_Stream => FT_Stream_OpenMemory
            FT_Extract_Frame     => FT_Stream_ExtractFrame

          Note that method names do not contain `_'.

        - The FT_ALLOC_ARRAY  and FT_REALLOC_ARRAY have  been replaced
          with  FT_NEW_ARRAY and  FT_RENEW_ARRAY which  do not  take a
          type  as the  fourth argument.   Instead, the  array element
          type  size is computed  automatically from  the type  of the
          target pointer used.

        - A  new object  class, FT_CMap,  has been  introduced.  These
          internal  objects are  used to  model character  maps.  This
          eases  the support  of additional  charmap types  within the
          engine.

        - A new  configuration file named `ftstdlib.h'  has been added
          to `include/freetype/config'.  It  is used to define aliases
          for  _every_ routine  of the  ISO  C library  that the  font
          engine   uses.    Each    aliases   has   a   `ft_'   prefix
          (e.g. `ft_strlen' is an alias for `strlen').

          This is  used to  ease the porting  of FreeType 2  to exotic
          runtime environments where the ISO C Library isn't available
          (e.g.  XFree86 extension modules).

      More details are available in the `ChangeLog' file.


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

CHANGES BETWEEN 2.0.9 and 2.0.8

  I. IMPORTANT BUG FIXES

    - Certain fonts like `foxjump.ttf' contain broken name tables with
      invalid entries and wild offsets.  This caused FreeType to crash
      when trying to load them.

      The  SFNT `name'  table  loader has  been  fixed to  be able  to
      support these strange fonts.

      Moreover, the code  in charge of processing this  table has been
      changed  to always favour  Windows-formatted entries  over other
      ones.  Hence,  a font that works  on Windows but not  on the Mac
      will  load cleanly in  FreeType and  report accurate  values for
      Family & PostScript names.

    - The CID font driver has been fixed.  It unfortunately returned a
      Postscript   Font   name   with   a   leading   slash,   as   in
      `/MunhwaGothic-Regular'.

    - FreeType  2 should now  compile fine  on AIX  4.3.3 as  a shared
      library.

    - A  bug  in the  Postscript  hinter  has  been found  and  fixed,
      removing un-even stem widths at small pixel sizes (like 14-17).

      This  improves the  quality of  a certain  number  of Postscript
      fonts.


  II. NEW FEATURES

    - A  new function  named  `FT_Library_Version' has  been added  to
      return  the current  library's major,  minor, and  patch version
      numbers.   This is  important since  the  macros FREETYPE_MAJOR,
      FREETYPE_MINOR,  and  FREETYPE_PATCH  cannot  be used  when  the
      library is dynamically linked by a program.

    - Two   new  APIs   have  been   added:   `FT_Get_First_Char'  and
      `FT_Get_Next_Char'.

      Together,  these can  be used  to iterate  efficiently  over the
      currently  selected  charmap of  a  given  face.   Read the  API
      reference for more details.


  III. MISCELLANEOUS

    - The FreeType sources are  under heavy internal re-factoring.  As
      a consequence,  we have created  a branch named `STABLE'  on the
      CVS to hold all future releases/fixes in the 2.0.x family.

      The  HEAD  branch  now  contains  the  re-factored  sources  and
      shouldn't  be used for  testing or  packaging new  releases.  In
      case you  would like  to access the  2.0.9 sources from  our CVS
      repository, use the tag `VER-2-0-9'.


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

CHANGES BETWEEN 2.0.8 and 2.0.7

  I. IMPORTANT BUG FIXES

    - There was  a small but  nasty bug in  `freetype-config.in' which
      caused the `freetype-config' script to fail on Unix.

      This didn't prevent the installation  of the library or even its
      execution, but caused problems  when trying to compile many Unix
      packages that depend on it.

    - Some TrueType or OpenType fonts embedded in PDF documents do not
      have  a  'cmap',  'post'  and  'name'  as  is  required  by  the
      specification.  FreeType no longer refuses to load such fonts.

    - Various fixes to the PCF font driver.


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

CHANGES BETWEEN 2.0.7 and 2.0.6

  I. IMPORTANT BUG FIXES

    - Fixed  two  bugs in  the  Type 1  font  driver.   The first  one
      resulted in a memory leak in subtle cases.  The other one caused
      FreeType to crash when  trying to load `.gsf' files (Ghostscript
      so-called Postscript fonts).

      (This  made _many_  KDE applications  crash on  certain systems.
       FreeType _is_ becoming a critical system component on Linux :-)

    - Fixed a memory leak in the CFF font driver.

    - Fixed a memory leak in the PCF font driver.

    - Fixed       the        Visual       C++       project       file
      `builds/win32/visualc/freetype.dsp' since  it didn't include the
      Postscript hinter component, causing errors at build time.

    - Fixed a  small rendering bug  in the anti-aliased  renderer that
      only  occurred when  trying to  draw  thin (less  than 1  pixel)
      strokes.

    - Fixed  `builds/unix/freetype2.a4' which  is used  to  generate a
      valid `freetype2.m4' for use with autoconf.

    - Fixed the OpenVMS Makefiles.


  II. MISCELLANEOUS

    - Added  `configure'  and   `install'  scripts  to  the  top-level
      directory.  A GNU-style installation is thus now easily possible
      with

        ./configure  <options>
        make
        make install


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

CHANGES BETWEEN 2.0.6 and 2.0.5

  I. IMPORTANT BUG FIXES

    - It wasn't possible to load embedded bitmaps when the auto-hinter
      was used.  This is now fixed.

    - The TrueType  font driver  didn't load some  composites properly
      (the  sub-glyphs  were  slightly  shifted,  and  this  was  only
      noticeable when using monochrome rendering).

    - Various  fixes  to the  auto-hinter.   They  merely improve  the
      output of sans-serif fonts.   Note that there are still problems
      with serifed fonts and composites (accented characters).

    - All scalable  font drivers erroneously  returned un-fitted glyph
      advances when hinting was  requested.  This created problems for
      a number  of layout applications.  This  is a very  old bug that
      got  undetected mainly  because most  test/demo  program perform
      rounding explicitly or implicitly (through the cache).

    - `FT_Glyph_To_Bitmap' did erroneously  modify the source glyph in
      certain cases.

    - `glnames.py'  still contained  a bug  that made  FreeType return
      invalid names for certain glyphs.

    - The  library crashed  when  loading certain  Type  1 fonts  like
      `sadn.pfb'  (`Stalingrad  Normal'),   which  appear  to  contain
      pathetic font info dictionaries.

    - The TrueType glyph  loader is now much more  paranoid and checks
      everything when loading a given glyph image.  This was necessary
      to avoid problems (crashes and/or memory overwrites) with broken
      fonts that came from a really buggy automatic font converter.


  II. IMPORTANT UPDATES AND NEW FEATURES

    - Important updates to the Mac-specific parts of the library.

    - The caching sub-system has  been completely re-designed, and its
      API has  evolved (the  old one is  still supported  for backward
      compatibility).

      The documentation for it is  not yet completed, sorry.  For now,
      you are encouraged to continue  using the old API.  However, the
      ftview  demo program in  the ft2demos  package has  already been
      updated to use the new caching functions.

    - A new charmap cache is provided too.  See `FTC_CMapCache'.  This
      is useful to perform  character code -> glyph index translations
      quickly, without the need for an opened FT_Face.

    - A NEW POSTSCRIPT HINTER module  has been added to support native
      hints in  the following  formats: PostScript Type  1, PostScript
      CID, and CFF/CEF.

      Please test!  Note that  the auto-hinter produces better results
      for a number of  badl