Repo created

libs/drape/data_buffer_impl.hpp

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+#pragma once
+
+#include "drape/cpu_buffer.hpp"
+#include "drape/data_buffer.hpp"
+#include "drape/gpu_buffer.hpp"
+
+#include "base/macros.hpp"
+
+#include <cstdint>
+#include <utility>
+
+namespace dp
+{
+// Generic implementation of data buffer.
+template <typename TBuffer>
+class DataBufferImpl : public DataBufferBase
+{
+public:
+  template <typename... Args>
+  DataBufferImpl(Args &&... params) : m_buffer(make_unique_dp<TBuffer>(std::forward<Args>(params)...))
+  {}
+
+  uint32_t GetCapacity() const override { return m_buffer->GetCapacity(); }
+  uint32_t GetCurrentSize() const override { return m_buffer->GetCurrentSize(); }
+  uint32_t GetAvailableSize() const override { return m_buffer->GetAvailableSize(); }
+  uint8_t GetElementSize() const override { return m_buffer->GetElementSize(); }
+  void Seek(uint32_t elementNumber) override { m_buffer->Seek(elementNumber); }
+
+protected:
+  drape_ptr<TBuffer> m_buffer;
+};
+
+// CPU implementation of data buffer.
+class CpuBufferImpl : public DataBufferImpl<CPUBuffer>
+{
+public:
+  template <typename... Args>
+  CpuBufferImpl(Args &&... params) : DataBufferImpl(std::forward<Args>(params)...)
+  {}
+
+  void const * Data() const override { return m_buffer->Data(); }
+
+  void UploadData(ref_ptr<GraphicsContext> context, void const * data, uint32_t elementCount) override
+  {
+    UNUSED_VALUE(context);
+    m_buffer->UploadData(data, elementCount);
+    uint32_t const newOffset = m_buffer->GetCurrentSize();
+    m_buffer->Seek(newOffset);
+  }
+
+  void * Map(ref_ptr<GraphicsContext> context, uint32_t elementOffset, uint32_t elementCount) override
+  {
+    UNUSED_VALUE(context);
+    UNUSED_VALUE(elementOffset);
+    UNUSED_VALUE(elementCount);
+    ASSERT(false, ("Mapping is unavailable for CPU buffer"));
+    return nullptr;
+  }
+
+  void UpdateData(void * destPtr, void const * srcPtr, uint32_t elementOffset, uint32_t elementCount) override
+  {
+    UNUSED_VALUE(destPtr);
+    UNUSED_VALUE(srcPtr);
+    UNUSED_VALUE(elementOffset);
+    UNUSED_VALUE(elementCount);
+    ASSERT(false, ("Data updating is unavailable for CPU buffer"));
+  }
+
+  void Unmap(ref_ptr<GraphicsContext> context) override
+  {
+    UNUSED_VALUE(context);
+    ASSERT(false, ("Unmapping is unavailable for CPU buffer"));
+  }
+
+  void Bind() override { ASSERT(false, ("Binding is unavailable for CPU buffer")); }
+};
+
+// GPU implementation of data buffer for OpenGL.
+class GpuBufferImpl : public DataBufferImpl<GPUBuffer>
+{
+public:
+  template <typename... Args>
+  GpuBufferImpl(Args &&... params) : DataBufferImpl(std::forward<Args>(params)...)
+  {}
+
+  void const * Data() const override
+  {
+    ASSERT(false, ("Retrieving of raw data is unavailable for GPU buffer"));
+    return nullptr;
+  }
+
+  void UploadData(ref_ptr<GraphicsContext> context, void const * data, uint32_t elementCount) override
+  {
+    UNUSED_VALUE(context);
+    m_buffer->UploadData(data, elementCount);
+  }
+
+  void * Map(ref_ptr<GraphicsContext> context, uint32_t elementOffset, uint32_t elementCount) override
+  {
+    UNUSED_VALUE(context);
+    return m_buffer->Map(elementOffset, elementCount);
+  }
+
+  void UpdateData(void * destPtr, void const * srcPtr, uint32_t elementOffset, uint32_t elementCount) override
+  {
+    m_buffer->UpdateData(destPtr, srcPtr, elementOffset, elementCount);
+  }
+
+  void Unmap(ref_ptr<GraphicsContext> context) override
+  {
+    UNUSED_VALUE(context);
+    m_buffer->Unmap();
+  }
+
+  void Bind() override { m_buffer->Bind(); }
+};
+}  // namespace dp