www.pudn.com > freetype.rar > ftgzip.h


/***************************************************************************/ 
/*                                                                         */ 
/*  ftgzip.h                                                               */ 
/*                                                                         */ 
/*    Gzip-compressed stream support.                                      */ 
/*                                                                         */ 
/*  Copyright 2002 by                                                      */ 
/*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */ 
/*                                                                         */ 
/*  This file is part of the FreeType project, and may only be used,       */ 
/*  modified, and distributed under the terms of the FreeType project      */ 
/*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     */ 
/*  this file you indicate that you have read the license and              */ 
/*  understand and accept it fully.                                        */ 
/*                                                                         */ 
/***************************************************************************/ 
 
 
#ifndef __FTGZIP_H__ 
#define __FTGZIP_H__ 
 
#include "ft2build.h" 
#include "freetype/freetype.h" 
 
FT_BEGIN_HEADER 
 
  /*************************************************************************/ 
  /*                                                                       */ 
  /* 
                                                             */ 
  /*    gzip                                                               */ 
  /*                                                                       */ 
  /*                                                                */ 
  /*    GZIP Streams                                                       */ 
  /*                                                                       */ 
  /* <Abstract>                                                            */ 
  /*    Using gzip-compressed font files                                   */ 
  /*                                                                       */ 
  /* <Description>                                                         */ 
  /*    This section contains the declaration of Gzip-specific functions.  */ 
  /*                                                                       */ 
  /*************************************************************************/ 
 
 /************************************************************************ 
  * 
  * @type: FT_Stream_OpenGzip 
  * 
  * @description: 
  *   open a new stream to parse gzip-compressed font files. This is 
  *   mainly used to support the compressed *.pcf.gz fonts that come 
  *   with XFree86 
  * 
  * @input: 
  *   stream :: target embedding stream 
  *   source :: source stream, used to 
  * 
  * @return: 
  *   error code. 0 means success 
  * 
  * @note: 
  *   the source stream must be opened _before_ calling this function. 
  * 
  *   calling @FT_Stream_Close on the new stream will *not* call 
  *   @FT_Stream_Close on the source stream. None of the stream objects 
  *   will be released to the heap. 
  * 
  *   the stream implementation is very basic, and resets the decompression 
  *   process each time seeking backwards is needed within the stream 
  * 
  *   in certain builds of the library, gzip compression recognition is 
  *   automatic when calling @FT_New_Face or @FT_Open_Face. This means that 
  *   if no font driver is capable of handling the raw compressed file, 
  *   the library will try to open a gzip stream from it and re-open 
  *   the face with it. 
  * 
  *   this function may return "FT_Err_Unimplemented" if your build of 
  *   FreeType was not compiled with zlib support. 
  */ 
  FT_EXPORT( FT_Error ) 
  FT_Stream_OpenGzip( FT_Stream    stream, 
                      FT_Stream    source ); 
 
 /* */ 
 
FT_END_HEADER 
 
#endif /* __FTGZIP_H__ */ 
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