diff --git a/example/DirectGLTexture/TGATexture.cpp b/example/DirectGLTexture/TGATexture.cpp
index 67df9310..c131c88b 100644
--- a/example/DirectGLTexture/TGATexture.cpp
+++ b/example/DirectGLTexture/TGATexture.cpp
@@ -52,7 +52,7 @@ namespace hgl
 
             if(!file.is_open())
             {
-                std::cerr<<"[ERROR] open file<"<<filename<<"> failed."<<std::endl;
+                std::cerr<<"[ERROR] open file<"<<filename.c_str()<<"> failed."<<std::endl;
                 return(false);
             }
 
@@ -90,7 +90,7 @@ namespace hgl
             }
             else
             {
-                std::cerr<<"[ERROR] Image format error,filename: "<<filename<<std::endl;
+                std::cerr<<"[ERROR] Image format error,filename: "<<filename.c_str()<<std::endl;
                 delete[] data;
                 return(false);
             }
@@ -105,7 +105,7 @@ namespace hgl
             glTextureParameteri(tex_id,GL_TEXTURE_WRAP_S,GL_CLAMP_TO_EDGE);
             glTextureParameteri(tex_id,GL_TEXTURE_WRAP_T,GL_CLAMP_TO_EDGE);
 
-            std::cout<<"load image file<"<<filename<<">:<"<<header->width<<"x"<<header->height<<"> to texture ok"<<std::endl;
+            std::cout<<"load image file<"<<filename.c_str()<<">:<"<<header->width<<"x"<<header->height<<"> to texture ok"<<std::endl;
 
             delete[] data;
             return(true);
diff --git a/example/DirectGLTexture/main.cpp b/example/DirectGLTexture/main.cpp
index 7de7fa3e..2da98c1c 100644
--- a/example/DirectGLTexture/main.cpp
+++ b/example/DirectGLTexture/main.cpp
@@ -41,14 +41,14 @@ void main()
 constexpr char fragment_shader[]=R"(
 #version 330 core
 
-uniform sampler2D TextureLuna;
+uniform sampler2D TextureLena;
 
 in vec2 FragmentTexCoord;
 out vec4 FragColor;
 
 void main()
 {
-    FragColor=texture(TextureLuna,FragmentTexCoord);
+    FragColor=texture(TextureLena,FragmentTexCoord);
 })";
 
 Shader shader;
@@ -119,10 +119,10 @@ void InitVertexBuffer()
 
 bool InitTexture()
 {
-    if(!LoadTGATexture("luna.tga",texture_id))
+    if(!LoadTGATexture("lena.tga",texture_id))
         return(false);
 
-    int texture_location=shader.GetUniformLocation("TextureLuna");
+    int texture_location=shader.GetUniformLocation("TextureLena");
 
     glBindTextureUnit(0,texture_id);
 
diff --git a/res/image/lena.tga b/res/image/lena.tga
new file mode 100644
index 00000000..e13151b2
Binary files /dev/null and b/res/image/lena.tga differ