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/* $Id$ */
/*
libg3d - 3D object loading library
Copyright (C) 2005-2009 Markus Dahms <mad@automagically.de>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <g3d/config.h>
#include <locale.h>
#include <string.h>
#include <libxml/parser.h>
#include <libxml/tree.h>
#include <g3d/types.h>
#include <g3d/stream.h>
#include <g3d/plugins.h>
static gchar * kmz_find_model(xmlDocPtr xmldoc);
static int kml_stream_read_cb(gpointer ctx, gchar *buffer, gint len)
{
return g3d_stream_read((G3DStream *)ctx, buffer, len);
}
EAPI
gboolean plugin_load_model_from_stream(G3DContext *context, G3DStream *stream,
G3DModel *model)
{
G3DStream *stream_dockml, *stream_model;
gchar *daename;
xmlDocPtr xmldoc;
gboolean retval = FALSE, from_zip = TRUE;
setlocale(LC_NUMERIC, "C");
xmlInitParser();
stream_dockml = g3d_stream_open_zip_from_stream(stream, "doc.kml");
if(stream_dockml == NULL) {
g_debug("KMZ: failed to read 'doc.kml' from '%s', trying to "
"use input stream as 'doc.kml'", stream->uri);
stream_dockml = stream;
from_zip = FALSE;
}
xmldoc = xmlReadIO(kml_stream_read_cb, NULL,
stream_dockml, "file:///tmp/doc.kml", NULL, 0);
if(xmldoc) {
g_debug("KMZ: parsed doc.kml");
daename = kmz_find_model(xmldoc);
if(daename != NULL) {
/*#if DEBUG > 1*/
g_debug("KMZ: loading '%s' from '%s'", daename, stream->uri);
/*#endif*/
if(from_zip)
stream_model = g3d_stream_open_zip_from_stream(stream,
daename);
else
stream_model = g3d_stream_open_file(daename, "r");
if(stream_model != NULL) {
retval = g3d_plugins_load_model_from_stream(context,
stream_model, model);
g3d_stream_close(stream_model);
} else {
g_warning("KMZ: failed to find '%s'%s%s%s", daename,
from_zip ? " in '" : "",
from_zip ? stream->uri : "",
from_zip ? "'" : "");
}
}
xmlFreeDoc(xmldoc);
}
if(from_zip)
g3d_stream_close(stream_dockml);
xmlCleanupParser();
return retval;
}
EAPI
gchar *plugin_description(void)
{
return g_strdup("Keyhole Markup Language model containers.");
}
EAPI
gchar **plugin_extensions(void)
{
return g_strsplit("kmz:kml:zip", ":", 0);
}
/*****************************************************************************/
static xmlNodePtr kmz_find_node(xmlNodePtr parentnode, const gchar *path)
{
gchar *slash, *elem;
xmlNodePtr node, pathnode;
gboolean last = FALSE;
slash = strchr(path, '/');
if(slash)
elem = g_strndup(path, slash - path);
else {
elem = g_strdup(path);
last = TRUE;
}
if(strlen(elem) == 0)
return NULL;
for(node = parentnode->children; node != NULL; node = node->next) {
if(node->type != XML_ELEMENT_NODE)
continue;
if(xmlStrcmp(node->name, (xmlChar *)elem) == 0) {
if(last) {
g_free(elem);
return node;
} else {
pathnode = kmz_find_node(node, slash + 1);
if(pathnode != NULL) {
g_free(elem);
return pathnode;
}
}
}
}
g_free(elem);
return NULL;
}
static gchar * kmz_find_model(xmlDocPtr xmldoc)
{
xmlNodePtr rootnode, hrefnode;
rootnode = xmlDocGetRootElement(xmldoc);
if(rootnode == NULL)
return NULL;
hrefnode = kmz_find_node(rootnode, "Folder/Placemark/Model/Link/href");
if(hrefnode)
return (gchar *)hrefnode->children->content;
hrefnode = kmz_find_node(rootnode, "Placemark/Model/Link/href");
if(hrefnode)
return (gchar *)hrefnode->children->content;
return NULL;
}
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