remove GLEW from MeshData.hpp & format Mesh.inl

src/graphics/core/gl_util.hpp

@@ -2,6 +2,7 @@
 
 #include "commons.hpp"
 #include "ImageData.hpp"
+#include "MeshData.hpp"
 
 #include <GL/glew.h>
 
@@ -23,4 +24,24 @@ namespace gl {
         };
         return primitives[static_cast<int>(primitive)];
     }
+
+    inline GLenum to_glenum(VertexAttribute::Type type) {
+        using Type = VertexAttribute::Type;
+        switch (type) {
+            case Type::FLOAT:
+                return GL_FLOAT;
+            case Type::UNSIGNED_INT:
+                return GL_UNSIGNED_INT;
+            case Type::INT:
+                return GL_INT;
+            case Type::UNSIGNED_SHORT:
+                return GL_UNSIGNED_SHORT;
+            case Type::SHORT:
+                return GL_SHORT;
+            case Type::UNSIGNED_BYTE:
+                return GL_UNSIGNED_BYTE;
+            case Type::BYTE:
+                return GL_BYTE;
+        }
+    }
 }