Edit File: ftgzip.h
/***************************************************************************/ /* */ /* ftgzip.h */ /* */ /* Gzip-compressed stream support. */ /* */ /* Copyright 2002-2018 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 FTGZIP_H_ #define FTGZIP_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> */ /* gzip */ /* */ /* <Title> */ /* GZIP Streams */ /* */ /* <Abstract> */ /* Using gzip-compressed font files. */ /* */ /* <Description> */ /* This section contains the declaration of Gzip-specific functions. */ /* */ /*************************************************************************/ /************************************************************************ * * @function: * FT_Stream_OpenGzip * * @description: * Open a new stream to parse gzip-compressed font files. This is * mainly used to support the compressed `*.pcf.gz' 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, gzip 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 gzipped 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 zlib support. */ FT_EXPORT( FT_Error ) FT_Stream_OpenGzip( FT_Stream stream, FT_Stream source ); /************************************************************************ * * @function: * FT_Gzip_Uncompress * * @description: * Decompress a zipped input buffer into an output buffer. This function * is modeled after zlib's `uncompress' function. * * @input: * memory :: * A FreeType memory handle. * * input :: * The input buffer. * * input_len :: * The length of the input buffer. * * @output: * output:: * The output buffer. * * @inout: * output_len :: * Before calling the function, this is the total size of the output * buffer, which must be large enough to hold the entire uncompressed * data (so the size of the uncompressed data must be known in * advance). After calling the function, `output_len' is the size of * the used data in `output'. * * @return: * FreeType error code. 0~means success. * * @note: * This function may return `FT_Err_Unimplemented_Feature' if your build * of FreeType was not compiled with zlib support. * * @since: * 2.5.1 */ FT_EXPORT( FT_Error ) FT_Gzip_Uncompress( FT_Memory memory, FT_Byte* output, FT_ULong* output_len, const FT_Byte* input, FT_ULong input_len ); /* */ FT_END_HEADER #endif /* FTGZIP_H_ */ /* END */
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