SLGLDepthBuffer.h

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/**
 * \file      SLGLDepthBuffer.h
 * \brief     Uses an OpenGL framebuffer object as a depth-buffer
 * \date      May 2020
 * \authors   Michael Schertenleib
 * \copyright http://opensource.org/licenses/GPL-3.0
 * \remarks   Please use clangformat to format the code. See more code style on
 *            https://github.com/cpvrlab/SLProject4/wiki/SLProject-Coding-Style
*/
 
#ifndef SLGLDEPTHBUFFER_H
#define SLGLDEPTHBUFFER_H
 
#include <SLObject.h>
#include <SLGLState.h>
#include <SL.h>
 
//-----------------------------------------------------------------------------
class SLGLDepthBuffer : SLObject
{
public:
    SLGLDepthBuffer(const SLVec2i& dimensions,
                    SLenum         magFilter     = GL_NEAREST,
                    SLenum         minFilter     = GL_NEAREST,
                    SLint          wrap          = GL_REPEAT,
                    SLfloat        borderColor[] = nullptr,
                    SLenum         target        = GL_TEXTURE_2D,
                    SLstring       name          = "SM-DepthBuffer");
    ~SLGLDepthBuffer();
 
    SLint    texID() { return _texID; }
    SLint    target() { return _target; }
    void     bindActive(SLuint texUnit) const;
    void     bind();
    void     unbind();
    void     bindFace(SLenum face) const;
    SLfloat* readPixels() const;
    SLVec2i  dimensions() { return _dimensions; }
 
private:
    SLVec2i _dimensions; //!< Size of the texture
    SLuint  _fboID;      //!< ID of the FB object
    SLint   _prevFboID;  //!< ID of the previously bound FB
    SLuint  _texID;      //!< ID of the texture
    SLenum  _target;     //!< GL_TEXTURE_2D or GL_TEXTURE_CUBE_MAP
};
//-----------------------------------------------------------------------------
typedef std::vector<SLGLDepthBuffer*> SLGLVDepthBuffer;
//-----------------------------------------------------------------------------
#endif // SLGLDEPTHBUFFER_H