add VKPrimitive and TextPrimitive

inc/hgl/graph/font/TextPrimitive.h

@@ -0,0 +1,50 @@
+#ifndef HGL_GRAPH_FONT_PRIMITIVE_INCLUDE
+#define HGL_GRAPH_FONT_PRIMITIVE_INCLUDE
+
+#include<hgl/graph/VKPrimitive.h>
+namespace hgl
+{
+    namespace graph
+    {
+        /**
+         * 文本图元
+         */
+        class TextPrimitive:public Primitive
+        {
+            GPUDevice * device;
+            Material *  mtl;
+
+            uint        max_count;                                      ///<缓冲区最大容量
+
+            VBO *       vbo_position;
+            VBO *       vbo_tex_coord;
+
+        protected:
+
+            friend class TextLayout;
+            friend class TextRender;
+
+            SortedSets<u32char> chars_sets;
+
+            const SortedSets<u32char> &GetCharsSets()const{return chars_sets;}
+            void SetCharsSets(const SortedSets<u32char> &sl){chars_sets=sl;}
+            void ClearCharsSets(){chars_sets.Clear();}
+
+        private:
+
+            virtual ~TextPrimitive();
+
+        public:
+
+            TextPrimitive(GPUDevice *,Material *,uint mc=1024);
+
+        public:
+
+            void SetCharCount   (const uint);
+
+            bool WriteVertex    (const int16 *fp);
+            bool WriteTexCoord  (const float *fp);
+        };//class TextPrimitive:public Renderable
+    }//namespace graph
+}//namespace hgl
+#endif//HGL_GRAPH_FONT_PRIMITIVE_INCLUDE