TextureBuffer.h

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/*
 * Copyright (C) 2006-2020 Istituto Italiano di Tecnologia (IIT)
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */
 
#ifndef YARP_OVRHEADSET_TEXTUREBUFFER_H
#define YARP_OVRHEADSET_TEXTUREBUFFER_H
 
#include <GL/glew.h>
#include <OVR_Math.h>
#include <mutex>
#include <yarp/sig/Image.h>
 
 
class TextureBuffer
{
public:
 
    void fromImage(ovrSession inSession, const yarp::sig::Image& img, double alpha = 1.0);
 
    //only for single thread contexts
    TextureBuffer();
 
    //multithread safe
    TextureBuffer(int w, int h, int eye, ovrSession session);
 
    ~TextureBuffer();
 
    void resize(size_t w = 0, size_t h = 0);
    void update(const yarp::sig::Image& img);
    void update();
    void lock();
    void unlock();
 
    ovrSession session;
    ovrTextureSwapChain textureSwapChain;
    int textureSwapChainSize;
 
    size_t width;
    size_t height;
    unsigned int components;
    unsigned int padding;
    size_t rowSize;
    size_t bufferSize;
    double alpha;
 
    ovrPosef eyePose;
 
    GLuint *pboIds;
 
    GLubyte* ptr;
    bool dataReady;
    std::mutex mutex;
 
    unsigned int missingFrames;
 
    size_t imageWidth;
    size_t imageHeight;
 
private:
 
    bool initialized;
    bool singleThread;
 
    void createTextureAndBuffers();
    void deleteTextureAndBuffers();
    int eye;
};
 
#endif // YARP_OVRHEADSET_TEXTUREBUFFER_H