axmol/cocos/2d/CCGrabber.h

/****************************************************************************
Copyright (c) 2009      On-Core
Copyright (c) 2010-2012 cocos2d-x.org
Copyright (C) 2013-2014 Chukong Technologies Inc.
 
http://www.cocos2d-x.org

Permission is hereby granted, free of charge, to any person obtaining a copy
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all copies or substantial portions of the Software.

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****************************************************************************/
#ifndef __EFFECTS_CCGRABBER_H__
#define __EFFECTS_CCGRABBER_H__

#include "base/CCRef.h"
#include "platform/CCGL.h"

NS_CC_BEGIN

class Texture2D;

/**
 * @addtogroup _2d
 * @{
 */

/** FBO class that grabs the contents of the screen */
class Grabber : public Ref
{
public:
    /**
    Constructor.
     * @js ctor
     */
    Grabber(void);
    /**
    Destructor.
     * @js NA
     * @lua NA
     */
    ~Grabber(void);
    /**Init the grab structure, will set the texture as the FBO color attachment.*/
    void grab(Texture2D *texture);
    /**Begin capture the screen, which will save the old FBO, clear color, and set the new FBO, clear the background.*/
    void beforeRender(Texture2D *texture);
    /**After capture, will reset the old FBO and clear color.*/
    void afterRender(Texture2D *texture);

protected:
    GLuint _FBO;
    GLint _oldFBO;
    GLfloat _oldClearColor[4];
};

// end of effects group
/// @}

NS_CC_END

#endif // __EFFECTS_CCGRABBER_H__