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freetype2
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freetype
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ftlzw.h
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/***************************************************************************/ /* */ /* ftlzw.h */ /* */ /* LZW-compressed stream support. */ /* */ /* Copyright 2004-2018 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 FTLZW_H_ #define FTLZW_H_ #include <ft2build.h> #include FT_FREETYPE_H #ifdef FREETYPE_H #error "freetype.h of FreeType 1 has been loaded!" #error "Please fix the directory search order for header files" #error "so that freetype.h of FreeType 2 is found first." #endif FT_BEGIN_HEADER /*************************************************************************/ /* */ /* <Section> */ /* lzw */ /* */ /* <Title> */ /* LZW Streams */ /* */ /* <Abstract> */ /* Using LZW-compressed font files. */ /* */ /* <Description> */ /* This section contains the declaration of LZW-specific functions. */ /* */ /*************************************************************************/ /************************************************************************ * * @function: * FT_Stream_OpenLZW * * @description: * Open a new stream to parse LZW-compressed font files. This is * mainly used to support the compressed `*.pcf.Z' fonts that come * with XFree86. * * @input: * stream :: The target embedding stream. * * source :: The source stream. * * @return: * FreeType error code. 0~means success. * * @note: * The source stream must be opened _before_ calling this function. * * Calling the internal function `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, LZW compression recognition is * automatically handled 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 LZW stream from it * and re-open the face with it. * * This function may return `FT_Err_Unimplemented_Feature' if your build * of FreeType was not compiled with LZW support. */ FT_EXPORT( FT_Error ) FT_Stream_OpenLZW( FT_Stream stream, FT_Stream source ); /* */ FT_END_HEADER #endif /* FTLZW_H_ */ /* END */