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1 .TH LIBGVC 3
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2 .SH NAME
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3 \fBlibgvc\fR \- Graphviz context library
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4 .SH SYNOPSIS
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5 .ta .75i 1.5i 2.25i 3i 3.75i 4.5i 5.25i 6i
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6 .PP
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7 .nf
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8 \f5
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9 #include <graphviz/gvc.h>
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10
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11 /* set up a graphviz context */
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12 extern GVC_t *gvNEWcontext(char **info, char *user);
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13 extern char *gvUsername(void);
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14
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15 /* set up a graphviz context \(hy alternative */
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16 /* (wraps the above two functions using info built into libgvc) */
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17 extern GVC_t *gvContext(void);
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18
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19 /* parse command line args \(hy minimally argv[0] sets layout engine */
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20 extern int gvParseArgs(GVC_t *gvc, int argc, char **argv);
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21 extern graph_t *gvNextInputGraph(GVC_t *gvc);
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22
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23 /* Compute a layout using a specified engine */
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24 extern int gvLayout(GVC_t *gvc, graph_t *g, char *engine);
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25
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26 /* Compute a layout using layout engine from command line args */
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27 extern int gvLayoutJobs(GVC_t *gvc, graph_t *g);
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28
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29 /* Render layout into string attributes of the graph */
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30 extern void attach_attrs(graph_t *g);
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31
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32 /* Parse an html string */
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33 extern char *agstrdup_html(char *s);
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34 extern int aghtmlstr(char *s);
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35
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36 /* Render layout in a specified format to an open FILE */
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37 extern int gvRender(GVC_t *gvc, graph_t *g, char *format, FILE *out);
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38
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39 /* Render layout in a specified format to an open FILE */
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40 extern int gvRenderFilename(GVC_t *gvc, graph_t *g, char *format, char *filename);
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41
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42 /* Render layout according to \-T and \-o options found by gvParseArgs */
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43 extern int gvRenderJobs(GVC_t *gvc, graph_t *g);
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44
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45 /* Clean up layout data structures \(hy layouts are not nestable (yet) */
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46 extern int gvFreeLayout(GVC_t *gvc, graph_t *g);
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47
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48 /* Clean up graphviz context */
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49 extern int gvFreeContext(GVC_t *gvc);
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50
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51 \fP
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52 .fi
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53 .SH DESCRIPTION
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54 \fIlibgvc\fP provides a context for applications wishing to manipulate
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55 and render graphs. It provides a command line parsing, common rendering code,
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56 and a plugin mechanism for renderers.
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57
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58 .SH SEE ALSO
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59 .BR dot (1),
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60 .BR neato (1),
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61 .BR libcdt (3)
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62 .BR libgraph (3)
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63 .br
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64
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65 .SH AUTHOR
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66 John Ellson (ellson@research.att.com), AT&T
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