add shader plugin reg

doric-Qt/doric/utils/object_factory.h

@@ -0,0 +1,46 @@
+#include <QByteArray>
+#include <QMetaObject>
+#include <QHash>
+
+#ifndef OBJECTFACTORY_H
+#define OBJECTFACTORY_H
+
+class ObjectFactory
+{
+public:
+    template<typename T>
+    static void registerClass(QString name)
+    {
+        constructors().insert(name, &constructorHelper<T>);
+    }
+
+    static bool acquireClass(QString name)
+    {
+        return constructors().keys().contains(name);
+    }
+
+    static QObject* createObject(const QString& name, QObject* parent = NULL)
+    {
+        Constructor constructor = constructors().value(name);
+        if ( constructor == NULL )
+            return NULL;
+        return (*constructor)(parent);
+    }
+
+private:
+    typedef QObject* (*Constructor)(QObject* parent);
+
+    template<typename T>
+    static QObject* constructorHelper(QObject* parent)
+    {
+        return new T(parent);
+    }
+
+    static QHash<QString, Constructor>& constructors()
+    {
+        static QHash<QString, Constructor> instance;
+        return instance;
+    }
+};
+
+#endif // OBJECTFACTORY_H