/usr/include/graphviz/gvplugin_render.h is in libgraphviz-dev 2.36.0-0ubuntu3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/* vim:set shiftwidth=4 ts=8: */
/*************************************************************************
* Copyright (c) 2011 AT&T Intellectual Property
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors: See CVS logs. Details at http://www.graphviz.org/
*************************************************************************/
#ifndef GVPLUGIN_RENDER_H
#define GVPLUGIN_RENDER_H
#include "types.h"
#include "gvplugin.h"
#include "gvcjob.h"
#ifdef __cplusplus
extern "C" {
#endif
struct gvrender_engine_s {
void (*begin_job) (GVJ_t * job);
void (*end_job) (GVJ_t * job);
void (*begin_graph) (GVJ_t * job);
void (*end_graph) (GVJ_t * job);
void (*begin_layer) (GVJ_t * job, char *layername,
int layerNum, int numLayers);
void (*end_layer) (GVJ_t * job);
void (*begin_page) (GVJ_t * job);
void (*end_page) (GVJ_t * job);
void (*begin_cluster) (GVJ_t * job);
void (*end_cluster) (GVJ_t * job);
void (*begin_nodes) (GVJ_t * job);
void (*end_nodes) (GVJ_t * job);
void (*begin_edges) (GVJ_t * job);
void (*end_edges) (GVJ_t * job);
void (*begin_node) (GVJ_t * job);
void (*end_node) (GVJ_t * job);
void (*begin_edge) (GVJ_t * job);
void (*end_edge) (GVJ_t * job);
void (*begin_anchor) (GVJ_t * job,
char *href, char *tooltip, char *target, char *id);
void (*end_anchor) (GVJ_t * job);
void (*begin_label) (GVJ_t * job, label_type type);
void (*end_label) (GVJ_t * job);
void (*textspan) (GVJ_t * job, pointf p, textspan_t * span);
void (*resolve_color) (GVJ_t * job, gvcolor_t * color);
void (*ellipse) (GVJ_t * job, pointf * A, int filled);
void (*polygon) (GVJ_t * job, pointf * A, int n, int filled);
void (*beziercurve) (GVJ_t * job, pointf * A, int n,
int arrow_at_start, int arrow_at_end, int);
void (*polyline) (GVJ_t * job, pointf * A, int n);
void (*comment) (GVJ_t * job, char *comment);
void (*library_shape) (GVJ_t * job, char *name, pointf * A, int n, int filled);
};
#ifdef __cplusplus
}
#endif
#endif /* GVPLUGIN_RENDER_H */
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