source: trunk/poppler/freetype2/include/freetype/ftgzip.h @ 251

Last change on this file since 251 was 251, checked in by Eugene Romanenko, 13 years ago

PDF plugin: freetype library updated to version 2.3.5

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1/***************************************************************************/
2/*                                                                         */
3/*  ftgzip.h                                                               */
4/*                                                                         */
5/*    Gzip-compressed stream support.                                      */
6/*                                                                         */
7/*  Copyright 2002, 2003, 2004, 2006 by                                    */
8/*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
9/*                                                                         */
10/*  This file is part of the FreeType project, and may only be used,       */
11/*  modified, and distributed under the terms of the FreeType project      */
12/*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     */
13/*  this file you indicate that you have read the license and              */
14/*  understand and accept it fully.                                        */
15/*                                                                         */
16/***************************************************************************/
17
18
19#ifndef __FTGZIP_H__
20#define __FTGZIP_H__
21
22#include <ft2build.h>
23#include FT_FREETYPE_H
24
25#ifdef FREETYPE_H
26#error "freetype.h of FreeType 1 has been loaded!"
27#error "Please fix the directory search order for header files"
28#error "so that freetype.h of FreeType 2 is found first."
29#endif
30
31
32FT_BEGIN_HEADER
33
34  /*************************************************************************/
35  /*                                                                       */
36  /* <Section>                                                             */
37  /*    gzip                                                               */
38  /*                                                                       */
39  /* <Title>                                                               */
40  /*    GZIP Streams                                                       */
41  /*                                                                       */
42  /* <Abstract>                                                            */
43  /*    Using gzip-compressed font files.                                  */
44  /*                                                                       */
45  /* <Description>                                                         */
46  /*    This section contains the declaration of Gzip-specific functions.  */
47  /*                                                                       */
48  /*************************************************************************/
49
50
51 /************************************************************************
52  *
53  * @function:
54  *   FT_Stream_OpenGzip
55  *
56  * @description:
57  *   Open a new stream to parse gzip-compressed font files.  This is
58  *   mainly used to support the compressed `*.pcf.gz' fonts that come
59  *   with XFree86.
60  *
61  * @input:
62  *   stream ::
63  *     The target embedding stream.
64  *
65  *   source ::
66  *     The source stream.
67  *
68  * @return:
69  *   FreeType error code.  0~means success.
70  *
71  * @note:
72  *   The source stream must be opened _before_ calling this function.
73  *
74  *   Calling the internal function `FT_Stream_Close' on the new stream will
75  *   *not* call `FT_Stream_Close' on the source stream.  None of the stream
76  *   objects will be released to the heap.
77  *
78  *   The stream implementation is very basic and resets the decompression
79  *   process each time seeking backwards is needed within the stream.
80  *
81  *   In certain builds of the library, gzip compression recognition is
82  *   automatically handled when calling @FT_New_Face or @FT_Open_Face.
83  *   This means that if no font driver is capable of handling the raw
84  *   compressed file, the library will try to open a gzipped stream from
85  *   it and re-open the face with it.
86  *
87  *   This function may return `FT_Err_Unimplemented_Feature' if your build
88  *   of FreeType was not compiled with zlib support.
89  */
90  FT_EXPORT( FT_Error )
91  FT_Stream_OpenGzip( FT_Stream  stream,
92                      FT_Stream  source );
93
94 /* */
95
96
97FT_END_HEADER
98
99#endif /* __FTGZIP_H__ */
100
101
102/* END */
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