New cpp folder structure

Signed-off-by: Alexander Borsuk <me@alex.bio>

libs/shaders/gl_program_pool.hpp

@@ -0,0 +1,36 @@
+#pragma once
+
+#include "shaders/program_pool.hpp"
+
+#include "drape/drape_global.hpp"
+#include "drape/shader.hpp"
+#include "drape/pointers.hpp"
+
+#include <cstdint>
+#include <map>
+#include <string>
+
+namespace gpu
+{
+class GLProgramPool : public ProgramPool
+{
+public:
+  explicit GLProgramPool(dp::ApiVersion apiVersion);
+  ~GLProgramPool() override;
+
+  drape_ptr<dp::GpuProgram> Get(Program program) override;
+
+  void SetDefines(std::string const & defines);
+
+private:
+  ref_ptr<dp::Shader> GetShader(std::string const & name, std::string const & source,
+                                dp::Shader::Type type);
+
+  dp::ApiVersion const m_apiVersion;
+  std::string m_baseDefines;
+
+  using Shaders = std::map<std::string, drape_ptr<dp::Shader>>;
+  Shaders m_shaders;
+  std::string m_defines;
+};
+}  // namespace gpu