gvloadimage.c

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/*************************************************************************
 * 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
 * https://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors: Details at https://graphviz.org
 *************************************************************************/
 
/*
 *  graphics code generator wrapper
 *
 *  This library forms the socket for run-time loadable loadimage plugins.  
 */
 
#include "config.h"
#include <common/const.h>
#include <gvc/gvplugin_loadimage.h>
#include <gvc/gvcint.h>
#include <gvc/gvcproc.h>
 
/* for agerr() */
#include <cgraph/cgraph.h>
#include <stdbool.h>
#include <stddef.h>
#include <util/agxbuf.h>
 
static int gvloadimage_select(GVJ_t * job, char *str)
{
    gvplugin_available_t *plugin;
    gvplugin_installed_t *typeptr;
 
    plugin = gvplugin_load(job->gvc, API_loadimage, str, NULL);
    if (plugin) {
        typeptr = plugin->typeptr;
        job->loadimage.engine = typeptr->engine;
        job->loadimage.id = typeptr->id;
        return GVRENDER_PLUGIN;
    }
    return NO_SUPPORT;
}
 
void gvloadimage(GVJ_t * job, usershape_t *us, boxf b, bool filled, const char *target)
{
    gvloadimage_engine_t *gvli;
    agxbuf type_buf = {0};
 
    assert(job);
    assert(us);
    assert(us->name);
    assert(us->name[0]);
 
    agxbprint(&type_buf, "%s:%s", us->stringtype, target);
    char *type = agxbuse(&type_buf);
 
    if (gvloadimage_select(job, type) == NO_SUPPORT)
            agwarningf("No loadimage plugin for \"%s\"\n", type);
 
    if ((gvli = job->loadimage.engine) && gvli->loadimage)
        gvli->loadimage(job, us, b, filled);
 
    agxbfree(&type_buf);
}