New cpp folder structure

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

libs/drape/index_buffer_mutator.cpp

@@ -0,0 +1,38 @@
+#include "drape/index_buffer_mutator.hpp"
+#include "drape/vertex_array_buffer.hpp"
+
+#include <algorithm>
+#include <cstring>
+
+namespace dp
+{
+IndexBufferMutator::IndexBufferMutator(uint32_t baseSize)
+{
+  m_buffer.Resize(baseSize);
+}
+
+void IndexBufferMutator::AppendIndexes(void const * indexes, uint32_t count)
+{
+  uint32_t dstActiveSize = m_activeSize + count;
+  if (dstActiveSize  > m_buffer.Size())
+    m_buffer.Resize(std::max(m_buffer.Size() * 2, dstActiveSize));
+
+  memcpy(m_buffer.GetRaw(m_activeSize), indexes, count * IndexStorage::SizeOfIndex());
+  m_activeSize = dstActiveSize;
+}
+
+void const * IndexBufferMutator::GetIndexes() const
+{
+  return m_buffer.GetRawConst();
+}
+
+uint32_t IndexBufferMutator::GetIndexCount() const
+{
+  return m_activeSize;
+}
+
+uint32_t IndexBufferMutator::GetCapacity() const
+{
+  return m_buffer.Size();
+}
+}  // namespace dp