[692] | 1 | /***************************************************************************/
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| 2 | /* */
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| 3 | /* ftlzw.h */
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| 4 | /* */
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| 5 | /* LZW-compressed stream support. */
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| 6 | /* */
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| 7 | /* Copyright 2004 by */
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| 8 | /* David Turner, Robert Wilhelm, and Werner Lemberg. */
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| 9 | /* */
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| 10 | /* This file is part of the FreeType project, and may only be used, */
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| 11 | /* modified, and distributed under the terms of the FreeType project */
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| 12 | /* license, LICENSE.TXT. By continuing to use, modify, or distribute */
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| 13 | /* this file you indicate that you have read the license and */
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| 14 | /* understand and accept it fully. */
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| 15 | /* */
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| 16 | /***************************************************************************/
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| 17 |
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| 18 |
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| 19 | #ifndef __FTLZW_H__
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| 20 | #define __FTLZW_H__
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| 21 |
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| 22 | #include <ft2build.h>
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| 23 | #include FT_FREETYPE_H
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| 24 |
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| 25 | #ifdef FREETYPE_H
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| 26 | #error "freetype.h of FreeType 1 has been loaded!"
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| 27 | #error "Please fix the directory search order for header files"
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| 28 | #error "so that freetype.h of FreeType 2 is found first."
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| 29 | #endif
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| 30 |
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| 31 |
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| 32 | FT_BEGIN_HEADER
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| 33 |
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| 34 | /*************************************************************************/
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| 35 | /* */
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| 36 | /* <Section> */
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| 37 | /* lzw */
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| 38 | /* */
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| 39 | /* <Title> */
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| 40 | /* LZW Streams */
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| 41 | /* */
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| 42 | /* <Abstract> */
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| 43 | /* Using LZW-compressed font files. */
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| 44 | /* */
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| 45 | /* <Description> */
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| 46 | /* This section contains the declaration of LZW-specific functions. */
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| 47 | /* */
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| 48 | /*************************************************************************/
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| 49 |
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| 50 | /************************************************************************
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| 51 | *
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| 52 | * @function:
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| 53 | * FT_Stream_OpenLZW
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| 54 | *
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| 55 | * @description:
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| 56 | * Open a new stream to parse LZW-compressed font files. This is
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| 57 | * mainly used to support the compressed *.pcf.Z fonts that come
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| 58 | * with XFree86.
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| 59 | *
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| 60 | * @input:
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| 61 | * stream :: The target embedding stream.
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| 62 | *
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| 63 | * source :: The source stream.
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| 64 | *
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| 65 | * @return:
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| 66 | * FreeType error code. 0 means success.
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| 67 | *
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| 68 | * @note:
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| 69 | * The source stream must be opened _before_ calling this function.
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| 70 | *
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| 71 | * Calling the internal function FT_Stream_Close on the new stream will
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| 72 | * *not* call FT_Stream_Close on the source stream. None of the stream
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| 73 | * objects will be released to the heap.
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| 74 | *
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| 75 | * The stream implementation is very basic and resets the decompression
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| 76 | * process each time seeking backwards is needed within the stream
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| 77 | *
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| 78 | * In certain builds of the library, LZW compression recognition is
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| 79 | * automatically handled when calling @FT_New_Face or @FT_Open_Face.
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| 80 | * This means that if no font driver is capable of handling the raw
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| 81 | * compressed file, the library will try to open a LZW stream from it
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| 82 | * and re-open the face with it.
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| 83 | *
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| 84 | * This function may return "FT_Err_Unimplemented" if your build of
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| 85 | * FreeType was not compiled with LZW support.
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| 86 | */
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| 87 | FT_EXPORT( FT_Error )
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| 88 | FT_Stream_OpenLZW( FT_Stream stream,
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| 89 | FT_Stream source );
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| 90 |
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| 91 | /* */
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| 92 |
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| 93 |
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| 94 | FT_END_HEADER
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| 95 |
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| 96 | #endif /* __FTLZW_H__ */
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| 97 |
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| 98 |
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| 99 | /* END */
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