+gamelab proj

1 files changed, 103 insertions, 0 deletions

diff --git a/Runtime/Graphics/VertexBuffer.h b/Runtime/Graphics/VertexBuffer.h
new file mode 100644
index 0000000..33c0783
--- /dev/null
+++ b/Runtime/Graphics/VertexBuffer.h
@@ -0,0 +1,103 @@
+#ifndef VBO_H
+#define VBO_H
+
+#include <vector>
+
+#include "../Utilities/UtilMacros.h"
+#include "../Shaders/ShaderChannel.h"
+
+#include "OpenGL.h"
+#include "GpuDataBuffer.h"
+
+enum VertexAttr
+{
+	VertexAttr_Position = 0,
+	VertexAttr_Normal = 1,
+	VertexAttr_Tangent = 2,
+	VertexAttr_Color = 3,
+	VertexAttr_TexCoord0 = 4,
+	VertexAttr_TexCoord1 = 5,
+
+	VertexAttr_Count = 6
+};
+
+enum RenderMode
+{
+	RenderMode_Triangle = 1,
+	RenderMode_Line = 2,
+	RenderMode_Point = 3,
+};
+
+struct VertexInputInfo
+{
+	const void* pointer; // either cpu memory or gpu memory
+	uint componentType; // one of VertexAttrFormat
+	uint componentNum;
+	uint16 stride;
+};
+
+// gpu side vertex attributes array
+struct VertexArrayInfo
+{
+	uint32 enableMask;
+	GLuint buffers[VertexAttr_Count];
+	VertexInputInfo attributes[VertexAttr_Count];
+};
+
+class VertexBuffer
+{
+public:
+	enum VertexBufferType
+	{
+		VertexBufferType_Static, // device
+		VertexBufferType_Stream, // pinned (best performance)
+		VertexBufferType_Dynamic,// device
+	};
+
+	VertexBuffer(VertexBufferType type);
+	~VertexBuffer();
+
+	void Draw();
+
+private:
+
+	VertexBufferType m_Type;
+	GPU::DataBuffer *m_VB, *m_IB;// vertex buffer and index buffer
+
+};
+
+class SharedVertexBuffer
+{
+public: 
+	void GetChunk(uint attrs, int maxVerts, int maxIndices, RenderMode mode, void **out_vb, void **out_ib);
+	void ReleaseChunk(int actualVerts, int actualIndices);
+
+	void DrawChunk();
+
+private: 
+
+	void FillVertexArrayInfo(VertexArrayInfo& 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, *m_CurIB;
+
+	// restore vbo and ibo data if not using pinned memory mapping
+	std::vector<byte> m_CurVBData;
+	std::vector<uint16> m_CurIBData;
+	
+	RenderMode m_CurRenderMode;
+
+	uint m_CurAttrMask;
+	uint m_CurStride;
+
+	uint m_CurVertexCount;
+	uint m_CurIndexCount;
+
+};
+
+#endif
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