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99 lines
4.2 KiB
99 lines
4.2 KiB
/***************************************************************************/ |
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/* */ |
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/* ftlzw.h */ |
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/* */ |
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/* LZW-compressed stream support. */ |
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/* */ |
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/* Copyright 2004, 2006 by */ |
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/* David Turner, Robert Wilhelm, and Werner Lemberg. */ |
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/* */ |
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/* This file is part of the FreeType project, and may only be used, */ |
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/* modified, and distributed under the terms of the FreeType project */ |
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/* license, LICENSE.TXT. By continuing to use, modify, or distribute */ |
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/* this file you indicate that you have read the license and */ |
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/* understand and accept it fully. */ |
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/* */ |
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/***************************************************************************/ |
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#ifndef __FTLZW_H__ |
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#define __FTLZW_H__ |
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#include <ft2build.h> |
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#include FT_FREETYPE_H |
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#ifdef FREETYPE_H |
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#error "freetype.h of FreeType 1 has been loaded!" |
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#error "Please fix the directory search order for header files" |
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#error "so that freetype.h of FreeType 2 is found first." |
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#endif |
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FT_BEGIN_HEADER |
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/*************************************************************************/ |
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/* */ |
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/* <Section> */ |
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/* lzw */ |
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/* */ |
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/* <Title> */ |
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/* LZW Streams */ |
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/* */ |
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/* <Abstract> */ |
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/* Using LZW-compressed font files. */ |
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/* */ |
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/* <Description> */ |
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/* This section contains the declaration of LZW-specific functions. */ |
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/* */ |
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/*************************************************************************/ |
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/************************************************************************ |
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* |
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* @function: |
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* FT_Stream_OpenLZW |
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* |
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* @description: |
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* Open a new stream to parse LZW-compressed font files. This is |
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* mainly used to support the compressed `*.pcf.Z' fonts that come |
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* with XFree86. |
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* |
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* @input: |
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* stream :: The target embedding stream. |
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* |
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* source :: The source stream. |
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* |
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* @return: |
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* FreeType error code. 0 means success. |
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* |
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* @note: |
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* The source stream must be opened _before_ calling this function. |
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* |
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* Calling the internal function `FT_Stream_Close' on the new stream will |
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* *not* call `FT_Stream_Close' on the source stream. None of the stream |
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* objects will be released to the heap. |
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* |
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* The stream implementation is very basic and resets the decompression |
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* process each time seeking backwards is needed within the stream |
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* |
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* In certain builds of the library, LZW compression recognition is |
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* automatically handled when calling @FT_New_Face or @FT_Open_Face. |
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* This means that if no font driver is capable of handling the raw |
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* compressed file, the library will try to open a LZW stream from it |
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* and re-open the face with it. |
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* |
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* This function may return `FT_Err_Unimplemented_Feature' if your build |
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* of FreeType was not compiled with LZW support. |
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*/ |
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FT_EXPORT( FT_Error ) |
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FT_Stream_OpenLZW( FT_Stream stream, |
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FT_Stream source ); |
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/* */ |
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FT_END_HEADER |
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#endif /* __FTLZW_H__ */ |
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/* END */
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