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| 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 | |
| 18 | |
| 19 | #ifndef __FTLZW_H__
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| 20 | #define __FTLZW_H__
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| 21 | |
| 22 | #include "ft2build.h" |
| 23 | #include FT_FREETYPE_H |
| 24 | |
| 25 | #ifdef FREETYPE_H
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| 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
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| 30 | |
| 31 | |
| 32 | FT_BEGIN_HEADER |
| 33 | |
| 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 | |
| 50 | /************************************************************************
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| 51 | * |
| 52 | * @function: |
| 53 | * FT_Stream_OpenLZW |
| 54 | * |
| 55 | * @description: |
| 56 | * Open a new stream to parse LZW-compressed font files. This is |
| 57 | * mainly used to support the compressed *.pcf.Z fonts that come |
| 58 | * with XFree86. |
| 59 | * |
| 60 | * @input: |
| 61 | * stream :: The target embedding stream. |
| 62 | * |
| 63 | * source :: The source stream. |
| 64 | * |
| 65 | * @return: |
| 66 | * FreeType error code. 0 means success. |
| 67 | * |
| 68 | * @note: |
| 69 | * The source stream must be opened _before_ calling this function. |
| 70 | * |
| 71 | * Calling the internal function FT_Stream_Close on the new stream will |
| 72 | * *not* call FT_Stream_Close on the source stream. None of the stream |
| 73 | * objects will be released to the heap. |
| 74 | * |
| 75 | * The stream implementation is very basic and resets the decompression |
| 76 | * process each time seeking backwards is needed within the stream |
| 77 | * |
| 78 | * In certain builds of the library, LZW compression recognition is |
| 79 | * automatically handled when calling @FT_New_Face or @FT_Open_Face. |
| 80 | * This means that if no font driver is capable of handling the raw |
| 81 | * compressed file, the library will try to open a LZW stream from it |
| 82 | * and re-open the face with it. |
| 83 | * |
| 84 | * This function may return "FT_Err_Unimplemented" if your build of |
| 85 | * FreeType was not compiled with LZW support. |
| 86 | */ |
| 87 | FT_EXPORT( FT_Error ) |
| 88 | FT_Stream_OpenLZW( FT_Stream stream, |
| 89 | FT_Stream source ); |
| 90 | |
| 91 | /* */
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| 92 | |
| 93 | |
| 94 | FT_END_HEADER |
| 95 | |
| 96 | #endif /* __FTLZW_H__ */ |
| 97 | |
| 98 | |
| 99 | /* END */
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