Basic buffer implementation

src/Engine/Graphics/Metal/Buffer.h

@@ -1,6 +1,8 @@
 #pragma once
 #include "Graphics/Buffer.h"
+#include "Graphics/Enums.h"
 #include "Graphics/Initializer.h"
+#include "Resources.h"
 
 namespace Seele {
 namespace Metal {
@@ -8,7 +10,29 @@ DECLARE_REF(Graphics)
 class Buffer
 {
 public:
+  Buffer(PGraphics graphics, uint64 size, void* data, bool dynamic);
+  virtual ~Buffer();
+  MTL::Buffer* getHandle() const
+  {
+    return buffers[currentBuffer];
+  }
+  uint64 getSize() const
+  {
+    return size;
+  }
+  void advanceBuffer()
+  {
+    currentBuffer = (currentBuffer + 1) % numBuffers;
+  }
+  void* map(bool writeOnly = true);
+  void* mapRegion(uint64 regionOffset, uint64 regionSize, bool writeOnly);
+  void unmap();
 private:
+  PGraphics graphics;
+  uint32 currentBuffer;
+  uint64 size;
+  MTL::Buffer* buffers[Gfx::numFramesBuffered];
+  uint32 numBuffers;
 };
 DEFINE_REF(Buffer)
 class VertexBuffer : public Gfx::VertexBuffer, public Buffer