used VBO instead of VAB

inc/hgl/graph/font/TextLayout.h

@@ -141,7 +141,7 @@ namespace hgl
         protected:
         
             TextRenderable *text_render_obj;
-            MemBlock<float> vertex;
+            MemBlock<int16> vertex;
             MemBlock<float> tex_coord;
 
         public:

inc/hgl/graph/font/TextRenderable.h

@@ -11,13 +11,13 @@ namespace hgl
          */
         class TextRenderable:public Renderable
         {
-            GPUDevice *    device;
+            GPUDevice * device;
             Material *  mtl;
 
             uint        max_count;                                      ///<缓冲区最大容量
 
-            VAB *       vab_position;
-            VAB *       vab_tex_coord;
+            VBO *       vbo_position;
+            VBO *       vbo_tex_coord;
 
         public:
 
@@ -28,7 +28,7 @@ namespace hgl
 
             void SetCharCount   (const uint);
 
-            bool WriteVertex    (const float *fp);
+            bool WriteVertex    (const int16 *fp);
             bool WriteTexCoord  (const float *fp);
         };//class TextRenderable:public Renderable
     }//namespace graph