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1 /* $Id: gvplugin.h,v 1.31 2009/07/14 13:18:07 ellson Exp $ $Revision: 1.31 $ */
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2 /* vim:set shiftwidth=4 ts=8: */
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3
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4 /**********************************************************
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5 * This software is part of the graphviz package *
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6 * http://www.graphviz.org/ *
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7 * *
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8 * Copyright (c) 1994-2004 AT&T Corp. *
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9 * and is licensed under the *
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10 * Common Public License, Version 1.0 *
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11 * by AT&T Corp. *
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12 * *
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13 * Information and Software Systems Research *
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14 * AT&T Research, Florham Park NJ *
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15 **********************************************************/
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16
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17 /* Header used by plugins */
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18
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19 #ifndef GVPLUGIN_H
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20 #define GVPLUGIN_H
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21
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22 #ifdef __cplusplus
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23 extern "C" {
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24 #endif
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25
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26 #include "gvcext.h"
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27
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28 /*
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29 * Terminology:
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30 *
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31 * package - e.g. libgvplugin_cairo.so
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32 * api - e.g. render
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33 * type - e.g. "png", "ps"
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34 */
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35
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36 typedef struct {
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37 int id; /* an id that is only unique within a package
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38 of plugins of the same api.
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39 A renderer-type such as "png" in the cairo package
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40 has an id that is different from the "ps" type
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41 in the same package */
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42 const char *type; /* a string name, such as "png" or "ps" that
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43 distinguishes different types withing the same
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44 (renderer in this case) */
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45 int quality; /* an arbitrary integer used for ordering plugins of
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46 the same type from different packages */
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47 void *engine; /* pointer to the jump table for the plugin */
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48 void *features; /* pointer to the feature description
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49 void* because type varies by api */
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50 } gvplugin_installed_t;
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51
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52 typedef struct {
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53 api_t api;
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54 gvplugin_installed_t *types;
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55 } gvplugin_api_t;
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56
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57 typedef struct {
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58 char *packagename; /* used when this plugin is builtin and has
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59 no pathname */
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60 gvplugin_api_t *apis;
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61 } gvplugin_library_t;
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62
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63 #ifdef __cplusplus
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64 }
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65 #endif
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66 #endif /* GVPLUGIN_H */
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