Added XML support and slideshow constructor to slideshow3D example, now
renamed from the previous osgslideshow.
This commit is contained in:
Robert Osfield
256
examples/slideshow3D/ReaderWriterXML.cpp
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256
examples/slideshow3D/ReaderWriterXML.cpp
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#include <osgDB/ReaderWriter>
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#include <osgDB/FileNameUtils>
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#include <osgDB/Registry>
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#include "SlideShowConstructor.h"
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <libxml/xmlmemory.h>
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#include <libxml/parser.h>
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/**
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* OpenSceneGraph plugin wrapper/converter.
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*/
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class ReaderWriterSS3D : public osgDB::ReaderWriter
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{
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public:
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ReaderWriterSS3D() { }
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virtual const char* className()
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{
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return "slideshow3D XML Reader/Writer";
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}
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virtual bool acceptsExtension(const std::string& extension)
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{
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return osgDB::equalCaseInsensitive(extension,"ss3d") ||
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osgDB::equalCaseInsensitive(extension,"xml") ;
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}
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virtual ReadResult readNode(const std::string& fileName,
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const osgDB::ReaderWriter::Options* options);
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void parseModel(SlideShowConstructor& constructor, xmlDocPtr doc, xmlNodePtr cur);
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void parseLayer(SlideShowConstructor& constructor, xmlDocPtr doc, xmlNodePtr cur);
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void parseSlide (SlideShowConstructor& constructor, xmlDocPtr doc, xmlNodePtr cur);
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osg::Vec4 mapStringToColor(const std::string& str)
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{
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if (str=="BLACK") return osg::Vec4(0.0f,0.0f,0.0f,1.0f);
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else return osg::Vec4(1.0f,1.0f,1.0f,1.0f);
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}
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};
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// Register with Registry to instantiate the above reader/writer.
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osgDB::RegisterReaderWriterProxy<ReaderWriterSS3D> g_readerWriter_SS3D_Proxy;
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void ReaderWriterSS3D::parseModel(SlideShowConstructor& constructor, xmlDocPtr doc, xmlNodePtr cur)
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{
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std::string filename;
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float scale = 1.0f;
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float rotation = 0.0f;
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float position = 0.5f;
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printf(" new model\n");
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xmlChar *key;
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cur = cur->xmlChildrenNode;
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while (cur != NULL)
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{
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if ((!xmlStrcmp(cur->name, (const xmlChar *)"filename")))
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{
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key = xmlNodeListGetString(doc, cur->xmlChildrenNode, 1);
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printf(" filename: %s\n", key);
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xmlFree(key);
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}
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else if ((!xmlStrcmp(cur->name, (const xmlChar *)"scale")))
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{
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key = xmlNodeListGetString(doc, cur->xmlChildrenNode, 1);
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printf(" scale: %s\n", key);
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xmlFree(key);
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}
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else if ((!xmlStrcmp(cur->name, (const xmlChar *)"rotation")))
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{
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key = xmlNodeListGetString(doc, cur->xmlChildrenNode, 1);
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printf(" rotation: %s\n", key);
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xmlFree(key);
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}
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else if ((!xmlStrcmp(cur->name, (const xmlChar *)"position")))
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{
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key = xmlNodeListGetString(doc, cur->xmlChildrenNode, 1);
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printf(" position: %s\n", key);
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xmlFree(key);
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}
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cur = cur->next;
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}
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if (!filename.empty()) constructor.addModel(filename,scale,rotation,position);
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}
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void ReaderWriterSS3D::parseLayer(SlideShowConstructor& constructor, xmlDocPtr doc, xmlNodePtr cur)
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{
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constructor.addLayer();
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printf(" new layer\n");
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xmlChar *key;
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cur = cur->xmlChildrenNode;
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while (cur != NULL)
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{
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if ((!xmlStrcmp(cur->name, (const xmlChar *)"bullet")))
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{
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key = xmlNodeListGetString(doc, cur->xmlChildrenNode, 1);
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constructor.addBullet((const char*)key);
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printf(" bullet: %s\n", key);
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xmlFree(key);
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}
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else if ((!xmlStrcmp(cur->name, (const xmlChar *)"paragraph")))
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{
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key = xmlNodeListGetString(doc, cur->xmlChildrenNode, 1);
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printf(" paragraph: %s\n", key);
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constructor.addParagraph((const char*)key);
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xmlFree(key);
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}
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else if ((!xmlStrcmp(cur->name, (const xmlChar *)"image")))
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{
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std::string filename;
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float height = 1.0f;
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key = xmlNodeListGetString(doc, cur->xmlChildrenNode, 1);
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printf(" image: %s\n", key);
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filename = (const char*)key;
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xmlFree(key);
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key = xmlGetProp (cur, (const xmlChar *)"height");
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if (key)
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{
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printf(" height: %s\n", key);
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height = atoi((const char*)key);
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xmlFree(key);
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}
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constructor.addImage(filename,height);
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}
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else if ((!xmlStrcmp(cur->name, (const xmlChar *)"model")))
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{
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parseModel(constructor, doc,cur);
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}
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cur = cur->next;
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}
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}
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void ReaderWriterSS3D::parseSlide (SlideShowConstructor& constructor, xmlDocPtr doc, xmlNodePtr cur)
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{
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printf("new slide\n");
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constructor.addSlide();
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xmlChar *key;
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cur = cur->xmlChildrenNode;
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while (cur != NULL)
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{
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if ((!xmlStrcmp(cur->name, (const xmlChar *)"title")))
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{
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key = xmlNodeListGetString(doc, cur->xmlChildrenNode, 1);
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constructor.setSlideTitle((const char*)key);
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printf(" title: %s\n", key);
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xmlFree(key);
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}
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else if ((!xmlStrcmp(cur->name, (const xmlChar *)"background")))
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{
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key = xmlNodeListGetString(doc, cur->xmlChildrenNode, 1);
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constructor.setSlideBackground((const char*)key);
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printf(" background: %s\n", key);
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xmlFree(key);
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}
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else if ((!xmlStrcmp(cur->name, (const xmlChar *)"layer")))
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{
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parseLayer (constructor, doc, cur);
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}
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cur = cur->next;
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}
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return;
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}
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osgDB::ReaderWriter::ReadResult ReaderWriterSS3D::readNode(const std::string& fileName,
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const osgDB::ReaderWriter::Options* options)
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{
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std::string ext = osgDB::getLowerCaseFileExtension(fileName);
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if (!acceptsExtension(ext))
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return ReadResult::FILE_NOT_HANDLED;
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xmlDocPtr doc;
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xmlNodePtr cur;
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doc = xmlParseFile(fileName.c_str());
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if (doc == NULL ) {
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fprintf(stderr,"Document not parsed successfully. \n");
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return ReadResult::FILE_NOT_HANDLED;
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}
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cur = xmlDocGetRootElement(doc);
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if (cur == NULL) {
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fprintf(stderr,"empty document\n");
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xmlFreeDoc(doc);
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return ReadResult::FILE_NOT_HANDLED;
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}
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if (xmlStrcmp(cur->name, (const xmlChar *) "presentation")) {
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fprintf(stderr,"document of the wrong type, root node != story");
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xmlFreeDoc(doc);
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return ReadResult::FILE_NOT_HANDLED;
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}
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SlideShowConstructor constructor;
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xmlChar *key;
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cur = cur->xmlChildrenNode;
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while (cur != NULL) {
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if ((!xmlStrcmp(cur->name, (const xmlChar *)"name")))
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{
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key = xmlNodeListGetString(doc, cur->xmlChildrenNode, 1);
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constructor.setPresentationName((const char*)key);
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printf("name: %s\n", key);
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xmlFree(key);
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}
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else if ((!xmlStrcmp(cur->name, (const xmlChar *)"bgcolor")))
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{
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key = xmlNodeListGetString(doc, cur->xmlChildrenNode, 1);
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constructor.setBackgroundColor(mapStringToColor((const char*)key));
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printf("bgcolor: %s\n", key);
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xmlFree(key);
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}
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else if ((!xmlStrcmp(cur->name, (const xmlChar *)"textcolor")))
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{
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key = xmlNodeListGetString(doc, cur->xmlChildrenNode, 1);
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constructor.setTextColor(mapStringToColor((const char*)key));
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printf("textcolor: %s\n", key);
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xmlFree(key);
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}
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else if ((!xmlStrcmp(cur->name, (const xmlChar *)"slide")))
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{
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parseSlide (constructor, doc, cur);
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}
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cur = cur->next;
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}
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xmlFreeDoc(doc);
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return constructor.takePresentation();
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}
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