+ custom vertex buffer

1 files changed, 54 insertions, 0 deletions

diff --git a/Runtime/Graphics/SharedVertexBuffer.h b/Runtime/Graphics/SharedVertexBuffer.h
new file mode 100644
index 0000000..001eb2c
--- /dev/null
+++ b/Runtime/Graphics/SharedVertexBuffer.h
@@ -0,0 +1,54 @@
+#pragma once
+#include <vector>
+
+#include "../Utilities/UtilMacros.h"
+#include "../Shaders/ShaderChannel.h"
+
+#include "OpenGL.h"
+#include "GPUDataBuffer.h"
+#include "DefaultVertexLayout.h"
+#include "CustomVertexLayout.h"
+#include "Primitive.h"
+
+class SharedVertexBuffer
+{
+public:
+	SharedVertexBuffer();
+	~SharedVertexBuffer();
+
+	// default layout 
+	void GetChunk(uint attrs, int maxVerts, int maxIndices, EPrimitive primitive, void **out_vb, void **out_ib);
+	void ReleaseChunk(int actualVerts, int actualIndices);
+	void DrawChunk();
+
+	// custom layout 
+	void GetChunk(uint sizePerVert, uint sizePerIndex, int maxVerts, int maxIndices, EPrimitive primitive, void **out_vb, void **out_ib);
+	void DrawChunk(CustomVertexLayout& layout);
+
+private:
+
+	void FillCustomVertexLayout(CustomVertexLayout& dst);
+	void FillDefaultVertexLayout(DefaultVertexLayout& dst);
+
+	void Clean();
+
+	// if vertex databuffer size beyond this value, use pinned memory mapping, instead of glBufferData.
+	enum { DataBufferThreshold = 1024 };
+
+	// shared vbo and ibo
+	GPU::DataBuffer *m_CurVB;
+	GPU::DataBuffer *m_CurIB;
+
+	// restore vbo and ibo data if not using pinned memory mapping
+	std::vector<byte> m_CurVBData;
+	std::vector<uint16> m_CurIBData;
+
+	EPrimitive m_CurPrimitive;
+
+	uint m_CurAttrMask; // default layout
+	uint m_CurStride; // default layout
+
+	uint m_CurVertexCount;
+	uint m_CurIndexCount;
+
+};