#ifndef _FrameBufferObject_H__
#define _FrameBufferObject_H__

#include <vector>
#include "common.h"


namespace CHCDemoEngine 
{ 


/** This class implements a wrapper for a color buffer object
*/
class ColorBufferObject
{
public:

	enum FORMAT { BUFFER_UBYTE, BUFFER_FLOAT_16, BUFFER_FLOAT_32 };
	enum WRAP_TYPE{ WRAP_REPEAT, WRAP_CLAMP_TO_EDGE };
	enum FILTER_TYPE { FILTER_NEAREST, FILTER_LINEAR, FILTER_MIPMAP_LINEAR };

	ColorBufferObject(int w, int h, 
		              FORMAT c, 
					  WRAP_TYPE wrapType, 
					  FILTER_TYPE filterType, 
					  bool useMipMap, 
					  bool useMultiSampling,
					  int attachment_idx);

	unsigned int GetTexture() const {return mTexId;}

protected:

	unsigned int mId;
	unsigned int mTexId;
};


/** This class implements a wrapper for a frame buffer object
*/
class FrameBufferObject
{
public:

	enum DEPTH_FORMAT { DEPTH_NONE, DEPTH_16, DEPTH_24, DEPTH_32 };

	/** constructor requesting an opengl occlusion query.
	*/
	FrameBufferObject(int w, int h, DEPTH_FORMAT d);
	/** Creates and adds a color buffer to the current frame buffer object.
		Returns the index that allows to retrieve the color buffer object.
	*/
	int AddColorBuffer(ColorBufferObject::FORMAT col, 
		               ColorBufferObject::WRAP_TYPE wrapType, 
					   ColorBufferObject::FILTER_TYPE filterType, 
					   bool useMipMap, 
					   bool useMultiSampling);

	/** Returns the color buffer object on position i.
	*/
	ColorBufferObject *GetColorBuffer(int i) const { return mColorBuffers[i]; }
	/** Binds this frame buffer object.
	*/
	void Bind() const;
	/** Releases any bound frame buffer object.
	*/
	static void Release();

protected:

	std::vector<ColorBufferObject *> mColorBuffers;

	unsigned int mId;
	unsigned int mDepthId;

	int mHeight;
	int mWidth;
};

} // namespace 
#endif // _FrameBufferObject_H__