VisibilityRenderer.h

/*
 * Copyright (c) 2018, Stefan Osswald
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 * * Redistributions of source code must retain the above copyright notice, this
 *   list of conditions and the following disclaimer.
 * 
 * * Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 * 
 * * Neither the name of the copyright holder nor the names of its
 *   contributors may be used to endorse or promote products derived from
 *   this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */ 

#ifndef INCLUDE_ARTICULATION_VISIBILITYRENDERER_H_
#define INCLUDE_ARTICULATION_VISIBILITYRENDERER_H_

#include <gpu_coverage/AbstractRenderer.h>
#include <gpu_coverage/Programs.h>
#include <list>

#undef GET_BUFFER_DIRECT

namespace gpu_coverage {

class VisibilityRenderer: public AbstractRenderer {
public:
    VisibilityRenderer(const Scene * const scene, const bool renderToWindow, const bool countPixels);

    ~VisibilityRenderer();

    virtual void display();
    void display(const bool countPixels);

    void getPixelCounts(std::vector<GLuint>& counts);

    inline const GLuint& getTexture() const {
        return textures[VISIBILITY];
    }
    inline const GLuint& getTexture(const size_t& i) const {
        return textures[VISIBILITY + i];
    }

    inline const int& getTextureHeight() const {
        return textureHeight;
    }

    inline const int& getTextureWidth() const {
        return textureWidth;
    }

protected:
    const bool renderToWindow;                                
    const bool countPixels;                                   
    ProgramVisualFlat progFlat;                               
    ProgramVisibility progVisibility;                         
    ProgramShowTexture *progShowTexture;                      
    ProgramPixelCounter *progPixelCounter;                    
    const int width;                                          
    const int height;                                         
    const int textureWidth;                                   
    const int textureHeight;                                  
    std::list<GLuint> pixelCounts;                            
    GLuint pixelCountBuffer;                                  
    GLuint framebuffers[2];                                   
    GLuint textures[20];                                      
    size_t numTextures;                                       
    GLuint vao;                                               
    GLuint vbo;                                               
    Node * projectionPlaneNode;                               
    AbstractCamera * camera;                                  
    typedef std::list<std::pair<Node *, GLuint> > Targets;    
    Targets targets;                                          

    enum TextureRole {
        DEPTH = 0,                                            
        COLOR = 1,                                            
        COLORTEXTURE = 2,                                     
        COUNTER = 3,                                          
        VISIBILITY = 4                                        
    };

#ifndef GET_BUFFER_DIRECT
    ProgramCounterToFB *progCounterToFB;                      
    GLuint pbo[4];                                            
    const GLuint numPbo;                                      
    GLuint curPbo;                                            
    GLuint run;                                               
    GLuint vaoPoint;                                          
    GLuint vboPoint;                                          
    void readBack();                                          
#endif

};

}  // namespace gpu_coverage

#endif /* INCLUDE_ARTICULATION_VISIBILITYRENDERER_H_ */