Initial revision

1 files changed, 124 insertions, 0 deletions

diff --git a/include/X11/fonts/fontenc.h b/include/X11/fonts/fontenc.h
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+/*
+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 1.8 2001/08/13 21:46:48 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