+init

1 files changed, 54 insertions, 0 deletions

diff --git a/Client/Source/Graphics/DynamicVertexBuffer.h b/Client/Source/Graphics/DynamicVertexBuffer.h
new file mode 100644
index 0000000..ad65d80
--- /dev/null
+++ b/Client/Source/Graphics/DynamicVertexBuffer.h
@@ -0,0 +1,54 @@
+#pragma once
+#include <vector>
+
+#include "../Utilities/UtilMacros.h"
+
+#include "OpenGL.h"
+#include "GPUDataBuffer.h"
+#include "DefaultVertexLayout.h"
+#include "CustomVertexLayout.h"
+#include "Primitive.h"
+
+// 动态填充的VBO
+class DynamicVertexBuffer
+{
+public:
+	DynamicVertexBuffer();
+	~DynamicVertexBuffer();
+
+	// default layout 
+	void GetChunk(uint attrs, int maxVerts, int maxIndices, EPrimitive primitive, void **out_vb, void **out_ib);
+	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);
+
+	// common
+	void ReleaseChunk(int actualVerts, int actualIndices);
+
+private:
+
+	void FillCustomVertexLayout(CustomVertexLayout& dst);
+	void FillDefaultVertexLayout(DefaultVertexLayout& dst);
+
+	void Clean();
+
+	// 如果数据大小小于这个限制，用内存数据，而不是glBufferData
+    static const int kDataBufferThreshold = 1024;
+
+	GPU::DataBuffer *m_CurVB;
+	GPU::DataBuffer *m_CurIB;
+
+	std::vector<byte> m_CurVBData;
+	std::vector<uint16> m_CurIBData;
+
+	EPrimitive m_CurPrimitive;
+
+	uint m_CurAttrMask; // default layout only
+	uint m_CurStride; // default layout only
+
+	uint m_CurVertexCount;
+	uint m_CurIndexCount;
+
+};
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