fontenc.h
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上传日期:2022-06-04
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文件大小:5k
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流媒体/Mpeg4/MP4
开发平台:
Visual C++
- /*
- Copyright (c) 1998-2001 by Juliusz Chroboczek
- Permission is hereby granted, free of charge, to any person obtaining a copy
- of this software and associated documentation files (the "Software"), to deal
- in the Software without restriction, including without limitation the rights
- to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- copies of the Software, and to permit persons to whom the Software is
- furnished to do so, subject to the following conditions:
- The above copyright notice and this permission notice shall be included in
- all copies or substantial portions of the Software.
- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- THE SOFTWARE.
- */
- /* $XFree86: xc/lib/font/include/fontenc.h,v 1.7 2000/11/14 16:54:45 dawes Exp $ */
- /* Header for backend-independent encoding code */
- /* An encoding is identified with a name. An encoding contains some
- global encoding data, such as its size, and a set of mappings.
- Mappings are identified by their type and two integers, known as
- pid and eid, the interpretation of which is type dependent. */
- #ifndef _FONTENC_H
- #define _FONTENC_H
- /* Encoding types. For future extensions, clients should be prepared
- to ignore unknown encoding types. */
- /* 0 is treated specially. */
- #define FONT_ENCODING_UNICODE 1
- #define FONT_ENCODING_TRUETYPE 2
- #define FONT_ENCODING_POSTSCRIPT 3
- /* This structure represents a mapping, either from numeric codes from
- numeric codes, or from numeric codes to strings. */
- /* It is expected that only one of `recode' and `name' will actually
- be present. However, having both fields simplifies the interface
- somewhat. */
- typedef struct _FontMap {
- int type; /* the type of the mapping */
- int pid, eid; /* the identification of the mapping */
- unsigned (*recode)(unsigned, void*); /* mapping function */
- char *(*name)(unsigned, void*); /* function returning glyph names */
- void *client_data; /* second parameter of the two above */
- struct _FontMap *next; /* link to next element in list */
- /* The following was added for version 0.3 of the font interface. */
- /* It should be kept at the end to preserve binary compatibility. */
- struct _FontEnc *encoding;
- } FontMapRec, *FontMapPtr;
- /* This is the structure that holds all the info for one encoding. It
- consists of a charset name, its size, and a linked list of mappings
- like above. */
- typedef struct _FontEnc {
- char *name; /* the name of the encoding */
- char **aliases; /* its aliases, null terminated */
- int size; /* its size, either in bytes or rows */
- int row_size; /* the size of a row, or 0 if bytes */
- FontMapPtr mappings; /* linked list of mappings */
- struct _FontEnc *next; /* link to next element */
- /* the following two were added in version 0.2 of the font interface */
- /* they should be kept at the end to preserve binary compatibility */
- int first; /* first byte or row */
- int first_col; /* first column in each row */
- } FontEncRec, *FontEncPtr;
- typedef struct _FontMapReverse {
- unsigned int (*reverse)(unsigned, void*);
- void *data;
- } FontMapReverseRec, *FontMapReversePtr;
- /* Function prototypes */
- /* extract an encoding name from an XLFD name. Returns a pointer to a
- *static* buffer, or NULL */
- char *FontEncFromXLFD(const char*, int);
- /* find the encoding data for a given encoding name; second parameter
- is the filename of the font for which the encoding is needed.
- Returns NULL on failure. */
- FontEncPtr FontEncFind(const char*, const char*);
- /* Find a given mapping for an encoding. This is only a convenience
- function, as clients are allowed to scavenge the data structures
- themselves (as the TrueType backend does). */
- FontMapPtr FontMapFind(FontEncPtr, int, int, int);
- /* Do both in a single step */
- FontMapPtr FontEncMapFind(const char *, int, int, int, const char *);
- /* Recode a code. Always succeeds. */
- unsigned FontEncRecode(unsigned, FontMapPtr);
- /* Return a name for a code. Returns a string or NULL. */
- char *FontEncName(unsigned, FontMapPtr);
- /* Return a pointer to the name of the system encodings directory. */
- /* This string is static and should not be modified. */
- char* FontEncDirectory(void);
- /* Identify an encoding file. If fileName doesn't exist, or is not an
- encoding file, return NULL, otherwise returns a NULL-terminated
- array of strings. */
- char **FontEncIdentify(const char *fileName);
- FontMapReversePtr FontMapReverse(FontMapPtr);
- void FontMapReverseFree(FontMapReversePtr);
- #endif