cocos2d-x ： csb的加载

                                   cocos2d-x  ： csb的加载

csb的加载时通过 CSLoader 类加载的
先看 CSLoader.h 简单介绍几个函数

class CC_STUDIO_DLL CSLoader
{public:// 通过csb文件名 创建节点 例如：cocos2d::CSLoader::createNode("aaa.csb");static cocos2d::Node* createNode(const std::string& filename);// 通过文件名 创建时间线 序列帧 例如：cocos2d::CSLoader::createTimeline("aaa.csb");static cocostudio::timeline::ActionTimeline* createTimeline(const std::string& filename);// 通过json文件名 创建节点 例如：cocos2d::CSLoader::createNode("aaa.csb");cocos2d::Node* createNodeFromJson(const std::string& filename);// 从文件中 获取到数据 buffer 初始化textures要用到的testure都放入SpriteFrameCache里// 获得NodeTreecocos2d::Node* createNodeWithFlatBuffersFile(const std::string& filename);// 将nodeTree里的节点递归调用此方法渲染出来cocos2d::Node* nodeWithFlatBuffers(const flatbuffers::NodeTree* nodetree, const ccNodeLoadCallback &callback);// load nodescocos2d::Node* loadSimpleNode(const rapidjson::Value& json);cocos2d::Node* loadSubGraph  (const rapidjson::Value& json);cocos2d::Node* loadSprite    (const rapidjson::Value& json);cocos2d::Node* loadParticle  (const rapidjson::Value& json);cocos2d::Node* loadTMXTiledMap(const rapidjson::Value& json);// load guicocos2d::Node* loadWidget(const rapidjson::Value& json);// load componentcocos2d::Component* loadComponent(const rapidjson::Value& json);cocos2d::Component* loadComAudio(const rapidjson::Value& json);bool isWidget(const std::string& type);bool isCustomWidget(const std::string& type);// 获得渲染节点的类名std::string getGUIClassName(const std::string &name);// 获得WidgetReader渲染器的类名std::string getWidgetReaderClassName(cocos2d::ui::Widget *widget);
};

代码里面加载csb

cocos2d::Node* root = cocos2d::CSLoader::createNode("aaa.csb");createNodeWithFlatBuffersFile(filename);createNodeWithFlatBuffersFile(filename, nullptr);nodeWithFlatBuffersFile(filename, callback);Node* CSLoader::nodeWithFlatBuffersFile(const std::string &fileName, const ccNodeLoadCallback &callback)
{std::string fullPath = FileUtils::getInstance()->fullPathForFilename(fileName);CC_ASSERT(FileUtils::getInstance()->isFileExist(fullPath));//  通过FileUtils类读取 csb里的内容保存到data中 里面使用的是文件操作打开文件、读取文件、关闭文件Data buf = FileUtils::getInstance()->getDataFromFile(fullPath);auto csparsebinary = GetCSParseBinary(buf.getBytes());  【1】auto csBuildId = csparsebinary->version();if (csBuildId){}// decode plistauto textures = csparsebinary->textures();int textureSize = textures->size();for (int i = 0; i < textureSize; ++i){SpriteFrameCache::getInstance()->addSpriteFramesWithFile(textures->Get(i)->c_str());}Node* node = nodeWithFlatBuffers(csparsebinary->nodeTree(), callback); 【2】return node;
}

【1】解析: GetCSParseBinary(buf.getBytes()) 此方法是在CSParseBinary_generated.h文件里的

inline const flatbuffers::CSParseBinary *GetCSParseBinary(const void *buf) {return flatbuffers::GetRoot<flatbuffers::CSParseBinary>(buf);
}
//  此方法会返回一个结构体
struct CSParseBinary FLATBUFFERS_FINAL_CLASS : private flatbuffers::Table {enum {VT_VERSION = 4,VT_TEXTURES = 6,VT_TEXTUREPNGS = 8,VT_NODETREE = 10,VT_ACTION = 12,VT_ANIMATIONLIST = 14};const flatbuffers::String *version() const { return GetPointer<const flatbuffers::String *>(VT_VERSION); }const flatbuffers::Vector<flatbuffers::Offset<flatbuffers::String>> *textures() const { return GetPointer<const flatbuffers::Vector<flatbuffers::Offset<flatbuffers::String>> *>(VT_TEXTURES); }const flatbuffers::Vector<flatbuffers::Offset<flatbuffers::String>> *texturePngs() const { return GetPointer<const flatbuffers::Vector<flatbuffers::Offset<flatbuffers::String>> *>(VT_TEXTUREPNGS); }const NodeTree *nodeTree() const { return GetPointer<const NodeTree *>(VT_NODETREE); }const NodeAction *action() const { return GetPointer<const NodeAction *>(VT_ACTION); }const flatbuffers::Vector<flatbuffers::Offset<AnimationInfo>> *animationList() const { return GetPointer<const flatbuffers::Vector<flatbuffers::Offset<AnimationInfo>> *>(VT_ANIMATIONLIST); }bool Verify(flatbuffers::Verifier &verifier) const {return VerifyTableStart(verifier) &&VerifyField<flatbuffers::uoffset_t>(verifier, VT_VERSION) &&verifier.Verify(version()) &&VerifyField<flatbuffers::uoffset_t>(verifier, VT_TEXTURES) &&verifier.Verify(textures()) &&verifier.VerifyVectorOfStrings(textures()) &&VerifyField<flatbuffers::uoffset_t>(verifier, VT_TEXTUREPNGS) &&verifier.Verify(texturePngs()) &&verifier.VerifyVectorOfStrings(texturePngs()) &&VerifyField<flatbuffers::uoffset_t>(verifier, VT_NODETREE) &&verifier.VerifyTable(nodeTree()) &&VerifyField<flatbuffers::uoffset_t>(verifier, VT_ACTION) &&verifier.VerifyTable(action()) &&VerifyField<flatbuffers::uoffset_t>(verifier, VT_ANIMATIONLIST) &&verifier.Verify(animationList()) &&verifier.VerifyVectorOfTables(animationList()) &&verifier.EndTable();}
};

【2】解析：递归调用nodeWithFlatBuffers(csparsebinary->nodeTree(), callback);把所有的节点渲染出来
渲染类

Node* CSLoader::nodeWithFlatBuffers(const flatbuffers::NodeTree *nodetree, const ccNodeLoadCallback &callback)
{if (nodetree == nullptr)return nullptr;{Node* node = nullptr;std::string classname = nodetree->classname()->c_str();auto options = nodetree->options();if (classname == "ProjectNode"){}else if (classname == "SimpleAudio"){}else{std::string customClassName = nodetree->customClassName()->c_str();if (customClassName != ""){classname = customClassName;}// getGUIClassName(classname);获得渲染的名称  比如classname = "Node"std::string readername = getGUIClassName(classname);readername.append("Reader");  // readername  = NodeReader// 从这些渲染类中生成对应的对象 reader NodeReaderProtocol* reader = dynamic_cast<NodeReaderProtocol*>(ObjectFactory::getInstance()->createObject(readername));if (reader){node = reader->createNodeWithFlatBuffers((const flatbuffers::Table*)options->data());【3】}}auto children = nodetree->children();int size = children->size();for (int i = 0; i < size; ++i){auto subNodeTree = children->Get(i);//递归把所有的子节点全部渲染出来Node* child = nodeWithFlatBuffers(subNodeTree, callback);}return node;}
}

【3】解析:createNodeWithFlatBuffers
比如NodeReader渲染器

void NodeReader::setPropsWithFlatBuffers(cocos2d::Node *node,const flatbuffers::Table* nodeOptions){auto options = (WidgetOptions*)(nodeOptions);std::string name = options->name()->c_str();float x             = options->position()->x();float y             = options->position()->y();float scalex        = options->scale()->scaleX();float scaley        = options->scale()->scaleY();//    float rotation      = options.rotation();float rotationSkewX      = options->rotationSkew()->rotationSkewX();float rotationSkewY      = options->rotationSkew()->rotationSkewY();float anchorx       = options->anchorPoint()->scaleX();float anchory       = options->anchorPoint()->scaleY();int zorder            = options->zOrder();int tag             = options->tag();int actionTag       = options->actionTag();bool visible        = options->visible() != 0;float w             = options->size()->width();float h             = options->size()->height();int alpha           = options->alpha();Color3B color(options->color()->r(), options->color()->g(), options->color()->b());std::string customProperty = options->customProperty()->c_str();node->setName(name);node->setPosition(Point(x, y));if(scalex != 1)node->setScaleX(scalex);if(scaley != 1)node->setScaleY(scaley);if (rotationSkewX != 0)node->setRotationSkewX(rotationSkewX);if (rotationSkewY != 0)node->setRotationSkewY(rotationSkewY);if(anchorx != 0.5f || anchory != 0.5f)node->setAnchorPoint(Point(anchorx, anchory));if(zorder != 0)node->setLocalZOrder(zorder);if(visible != true)node->setVisible(visible);node->setContentSize(Size(w, h));if (alpha != 255)node->setOpacity(alpha);node->setColor(color);node->setTag(tag);ComExtensionData* extensionData = ComExtensionData::create();extensionData->setCustomProperty(customProperty);extensionData->setActionTag(actionTag);if (node->getComponent(ComExtensionData::COMPONENT_NAME)){node->removeComponent(ComExtensionData::COMPONENT_NAME);}node->addComponent(extensionData);node->setCascadeColorEnabled(true);node->setCascadeOpacityEnabled(true);setLayoutComponentPropsWithFlatBuffers(node, nodeOptions);}

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