1LIBGVC(3) Library Functions Manual LIBGVC(3)
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6 libgvc - Graphviz context library
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9 #include <graphviz/gvc.h>
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11 /* set up a graphviz context */
12 extern GVC_t *gvNEWcontext(char **info, char *user);
13 extern char *gvUsername(void);
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15 /* set up a graphviz context - alternative */
16 /* (wraps the above two functions using info built into libgvc) */
17 extern GVC_t *gvContext(void);
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19 /* parse command line args - minimally argv[0] sets layout engine */
20 extern int gvParseArgs(GVC_t *gvc, int argc, char **argv);
21 extern graph_t *gvNextInputGraph(GVC_t *gvc);
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23 /* Compute a layout using a specified engine */
24 extern int gvLayout(GVC_t *gvc, graph_t *g, char *engine);
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26 /* Compute a layout using layout engine from command line args */
27 extern int gvLayoutJobs(GVC_t *gvc, graph_t *g);
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29 /* Render layout into string attributes of the graph */
30 extern void attach_attrs(graph_t *g);
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32 /* Parse an html string */
33 extern char *agstrdup_html(char *s);
34 extern int aghtmlstr(char *s);
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36 /* Render layout in a specified format to an open FILE */
37 extern int gvRender(GVC_t *gvc, graph_t *g, char *format, FILE *out);
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39 /* Render layout in a specified format to an open FILE */
40 extern int gvRenderFilename(GVC_t *gvc, graph_t *g, char *format, char *filename);
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42 /* Render layout according to -T and -o options found by gvParseArgs */
43 extern int gvRenderJobs(GVC_t *gvc, graph_t *g);
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45 /* Clean up layout data structures - layouts are not nestable (yet) */
46 extern int gvFreeLayout(GVC_t *gvc, graph_t *g);
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48 /* Clean up graphviz context */
49 extern int gvFreeContext(GVC_t *gvc);
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53 libgvc provides a context for applications wishing to manipulate and
54 render graphs. It provides a command line parsing, common rendering
55 code, and a plugin mechanism for renderers.
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59 dot(1), neato(1), libcdt(3) libgraph(3)
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63 John Ellson (ellson@research.att.com), AT&T
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67 LIBGVC(3)