/usr/include/fontforge/plugins.h is in libfontforge-dev 20120731.b-5ubuntu0.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 | /* Copyright (C) 2005-2012 by George Williams */
/*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/* If a user wants to write a fontforge plugin s/he should include this file */
/*
I envision that there will eventually be three types of plug-ins. At the
moment I am only supporing two of them.
* A plug in which adds a new encoding to the encoding/force encoding
menus.
* A plug in which adds a new scripting command
* A plug in which adds a new menu item.
(I haven't figure out how I want to do this last. So I'm not currently
supporting it.)
A plug-in should be a dynamic library.
Plug-ins will be loaded at start up if they are in the default plugin
directory, or a script may explicitly invoke a LoadPlugin() call
and pass a filename.
Each plug-in should contain an entry-point:
void FontForgeInit(void);
When FF loads a plug-in it will call this entry point.
I expect that this routine in term will call one (or more) of the install
routines (though it can do whatever it likes):
* AddEncoding(name,enc-to-unicode-func,unicode-to-enc-func)
* AddScriptingCommand(name,func,needs-font)
Once loaded, there is no way to remove a plug in -- but you can map a
plug in's name to do something else.
I am presuming that plugins will be linked against libfontforge and
that it will have access to all routines declared in fontforge's
header files. I do not expect to turn this into a real library with
a true API. It's just a catch all bag of routines I have needed.
It's not documented either.
*/
/* Entry point all plugins must contain */
extern int FontForgeInit(void);
/* If the load fails, then this routine should return 0, else 1 */
/* if it returns 0, fontforge will dlclose the shared lib */
/* FontForge will not complain itself. FontForgeInit should */
/* call LogError (or gwwv_post_error or whatever) if it wants */
/* to report failure */
/* AddScriptingCommand is documented within */
#include "scripting.h"
/* AddEncoding is documented here */
typedef int (*EncFunc)(int);
extern int AddEncoding(char *name,EncFunc enc_to_uni,EncFunc uni_to_enc,int max);
/* The "Encoding" here is a little different from what you normally see*/
/* It isn't a mapping from a byte stream to unicode, but from an int */
/* to unicode. If we have an 8/16 encoding (EUC or SJIS) then the */
/* single byte entries will be numbers less than <256 and the */
/* multibyte entries will be numbers >=256. So an encoding might be */
/* valid for the domain [0x20..0x7f] [0xa1a1..0xfefe] */
/* In other words, we're interested in the ordering displayed in the */
/* fontview. Nothing else */
/* The max value need not be exact (though it should be at least as big)*/
/* if you create a new font with the given encoding, then the font will */
/* have max slots in it by default */
/* A return value of -1 (from an EncFunc) indicates no mapping */
/* AddEncoding returns 1 if the encoding was added, 2 if it replaced */
/* an existing encoding, 0 if you attempt to replace a builtin */
/* encoding */
/* Internal routines. Plugins shouldn't need these */
extern void LoadPlugin(char *dynamic_lib_name);
/* Loads a single plugin file */
extern void LoadPluginDir(char *dir);
/* Loads any dynamic libs from this directory. if dir is NULL loads from */
/* default directory */
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