New cpp folder structure

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

libs/drape/gpu_buffer.hpp

@@ -0,0 +1,47 @@
+#pragma once
+
+#include "drape/buffer_base.hpp"
+#include "drape/drape_diagnostics.hpp"
+#include "drape/pointers.hpp"
+
+namespace dp
+{
+class GPUBuffer : public BufferBase
+{
+  using TBase = BufferBase;
+
+public:
+  enum Target
+  {
+    ElementBuffer,
+    IndexBuffer
+  };
+
+  GPUBuffer(Target t, void const * data, uint8_t elementSize, uint32_t capacity,
+            uint64_t batcherHash);
+  ~GPUBuffer() override;
+
+  void UploadData(void const * data, uint32_t elementCount);
+  void Bind();
+
+  void * Map(uint32_t elementOffset, uint32_t elementCount);
+  void UpdateData(void * gpuPtr, void const * data, uint32_t elementOffset, uint32_t elementCount);
+  void Unmap();
+
+protected:
+  // Discard old data.
+  void Resize(void const * data, uint32_t elementCount);
+
+private:
+  Target m_t;
+  uint32_t m_bufferID;
+  uint32_t m_mappingOffset;
+#ifdef TRACK_GPU_MEM
+  uint64_t m_batcherHash;
+#endif
+
+#ifdef DEBUG
+  bool m_isMapped;
+#endif
+};
+}  // namespace dp