forked from minhngoc25a/freetype2
100 lines
4.2 KiB
C
100 lines
4.2 KiB
C
/***************************************************************************/
|
|
/* */
|
|
/* ftlzw.h */
|
|
/* */
|
|
/* LZW-compressed stream support. */
|
|
/* */
|
|
/* Copyright 2004, 2006 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 */
|