| /**************************************************************************** |
| * |
| * ftgzip.h |
| * |
| * Gzip-compressed stream support. |
| * |
| * Copyright (C) 2002-2021 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 <freetype/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: |
| * 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. |
| * |
| * The stream implementation is very basic and resets the decompression |
| * process each time seeking backwards is needed within the stream, |
| * which significantly undermines the performance. |
| * |
| * 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. |
| * |
| * 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 */ |