1 files changed, 8 insertions, 1 deletions
diff --git a/include/RenderBackend/OpenGL/VertexShader.hpp b/include/RenderBackend/OpenGL/VertexShader.hpp
index 3239be2..43a5dd8 100644
--- a/include/RenderBackend/OpenGL/VertexShader.hpp
+++ b/include/RenderBackend/OpenGL/VertexShader.hpp
@@ -1,6 +1,8 @@
 #pragma once
 
 #include "../../DataView.hpp"
+#include "../../utils.hpp"
+#include "../../Result.hpp"
 #include "ShaderVec.hpp"
 #include <string>
 #include <unordered_map>
@@ -40,18 +42,23 @@ namespace amalgine
      * Using the same VertexShader instance in multiple threads to define data is not thread safe.
      * All get*** functions are thread safe.
      */
+    class CompiledVertexShader;
+    
     class VertexShader
     {
+        DISABLE_COPY(VertexShader)
+        friend class ShaderProgram;
     public:
         VertexShader();
         
         const std::string& getInputAttributeName(i32 attributeIndex);
         ShaderInputVec2 defineInputVec2(const std::string &name);
         void defineMain(VertexShaderMainFunc mainFunc);
-        std::string build() const;
+        Result<CompiledVertexShader*> compile();
     private:
         void writeHeader(const std::string &code);
         void writeBody(const std::string &code);
+        std::string build() const;
         
         /*
          * Throws VertexShaderTooManyInputAttributes if too many vertex attributes are defined for the platform.