diff --git a/inc/hgl/2d/Blend.h b/inc/hgl/2d/Blend.h
index eb6b5fe..3b16ad0 100644
--- a/inc/hgl/2d/Blend.h
+++ b/inc/hgl/2d/Blend.h
@@ -6,52 +6,17 @@ namespace hgl
 {
     namespace bitmap
     {
-        enum class BlendMode
-        {
-            NoBlend,            ///<不混合
-            Alpha,              ///<Alpha混合
-            Add,                ///<加法混合
-            Sub,                ///<减法混合
-        };//enum class BlendMode
-
         template<typename T> struct BlendColor
         {
-            BlendMode mode=BlendMode::NoBlend;
-
-        public:
-
-            virtual const T &BlendNoBlend(const T &src,const T &dst,const float alpha)
+            virtual const T operator()(const T &src,const T &)const
             {
                 return src;
             }
 
-            virtual const T &BlendAlpha(const T &src,const T &dst,const float alpha)
+            virtual const T operator()(const T &src,const T &,const float &)const
             {
-                return src*alpha+dst*(1-alpha);
-            }
-
-            virtual const T &BlendAdd(const T &src,const T &dst,const float alpha)
-            {
-                return src*alpha+dst;
-            }
-
-            virtual const T &BlendSub(const T &src,const T &dst,const float alpha)
-            {
-                return src*alpha-dst;
-            }
-
-            virtual const T &Blend(const T &src,const T &dst,const float alpha)
-            {
-                switch(mode)
-                {
-                    case BlendMode::NoBlend:    return BlendNoBlend(src,dst,alpha);
-                    case BlendMode::Alpha:      return BlendAlpha(src,dst,alpha);
-                    case BlendMode::Add:        return BlendAdd(src,dst,alpha);
-                    case BlendMode::Sub:        return BlendSub(src,dst,alpha);
-                }
-
                 return src;
             }
-        };//template<typename T> class BlendColor
+        };//template<typename T> struct BlendColor
     }//namespace bitmap
 }//namespace hgl
\ No newline at end of file
diff --git a/inc/hgl/2d/DrawGeometry.h b/inc/hgl/2d/DrawGeometry.h
index 84aa1cd..0487d22 100644
--- a/inc/hgl/2d/DrawGeometry.h
+++ b/inc/hgl/2d/DrawGeometry.h
@@ -21,6 +21,7 @@ namespace hgl
             T draw_color;
             float alpha;
 
+            BlendColor<T> no_blend;
             BlendColor<T> *blend;
 
         public:
@@ -28,8 +29,9 @@ namespace hgl
             DrawGeometry(FormatBitmap *fb)
             {
                 bitmap=fb;
-                draw_color=0;
+                hgl_zero(draw_color);
                 alpha=1;
+                blend=&no_blend;
             }
 
             virtual ~DrawGeometry()=default;
@@ -44,14 +46,9 @@ namespace hgl
                 blend=bc;
             }
 
-            virtual void SetBlend(const BlendMode &mode)
-            {
-                blend->mode=mode;                
-            }
-
             void CloseBlend()
             {
-                blend->mode=BlendMode.NoBlend;
+                blend=&no_blend;
             }
 
             void SetAlpha(const float &a)
@@ -80,7 +77,7 @@ namespace hgl
 
                 if(!p)return(false);
 
-                *p=blend->Blend(draw_color,*p,alpha);
+                *p=(*blend)(draw_color,*p,alpha);
 
                 return(true);
             }
@@ -102,7 +99,7 @@ namespace hgl
                 T *p=bitmap->GetData(x,y);
 
                 for(int i=0;i<length;i++)
-                    *p++=blend->Blend(draw_color,*p,alpha);
+                    *p++=(*blend)(draw_color,*p,alpha);
 
                 return(true);
             }
@@ -129,7 +126,7 @@ namespace hgl
                 for(int y=t;y<t+h;y++)
                 {
                     for(int i=0;i<length;i++)
-                        *p++=blend->Blend(draw_color,*p,alpha);
+                        *p++=(*blend)Blend(draw_color,*p,alpha);
 
                     p+=width-w;
                 }
@@ -156,7 +153,7 @@ namespace hgl
 
                 for(int i=0;i<length;i++)
                 {
-                    *p=blend->Blend(draw_color,*p,alpha);
+                    *p=(*blend)Blend(draw_color,*p,alpha);
                     p+=line_bytes;
                 }