- added lock/unlock methods to the buffer implementations.

These are not interchangeable with Map/Unmap!
Map/Unmap is for mapping a buffer for updating on old hardware, Lock/Unlock are for manually copying some initialization data directly into a static buffer.

src/hwrenderer/data/vertexbuffer.h

@@ -43,6 +43,8 @@ public:
 	virtual ~IVertexBuffer() {}
 	virtual void SetData(size_t size, void *data, bool staticdata = true) = 0;
 	virtual void SetFormat(int numBindingPoints, int numAttributes, size_t stride, const FVertexBufferAttribute *attrs) = 0;
+	virtual void *Lock(unsigned int size) = 0;
+	virtual void Unlock() = 0;
 	virtual void Map() {}		// Only needed by old OpenGL but this needs to be in the interface.
 	virtual void Unmap() {}
 	void *Memory() { assert(map); return map; }
@@ -59,5 +61,7 @@ protected:
 public:
 	virtual ~IIndexBuffer() {}
 	virtual void SetData(size_t size, void *data, bool staticdata = true) = 0;
+	virtual void *Lock(unsigned int size) = 0;
+	virtual void Unlock() = 0;
 };