fix issue

src/framework/graphics/graphics.cpp

@@ -71,7 +71,7 @@ void Graphics::init()
     }
 
     m_useFBO = m_useFBO && (GLEW_ARB_framebuffer_object || GLEW_EXT_framebuffer_object);
-    m_generateHardwareMipmaps = m_generateHardwareMipmaps && m_useFBO; // glGenerateMipmap is supported when FBO is
+    m_generateHardwareMipmaps = m_generateHardwareMipmaps && GLEW_ARB_framebuffer_object; // glGenerateMipmap is supported when GLEW_ARB_framebuffer_object is
 #endif
 
     glEnable(GL_BLEND);