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