samplebuffer.h

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/***************************************************************************
 *   Copyright (C) 1998-2010 by authors (see AUTHORS.txt )                 *
 *                                                                         *
 *   This file is part of LuxRays.                                         *
 *                                                                         *
 *   LuxRays is free software; you can redistribute it and/or modify       *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 3 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   LuxRays 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 General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program.  If not, see <http://www.gnu.org/licenses/>. *
 *                                                                         *
 *   LuxRays website: http://www.luxrender.net                             *
 ***************************************************************************/

#ifndef _SAMPLEBUFFER_H
#define _SAMPLEBUFFER_H

#include "luxrays/core/pixel/spectrum.h"

namespace luxrays {

typedef struct {
        float screenX, screenY;
        Spectrum radiance;
} SampleBufferElem;

class SampleBuffer {
public:
        SampleBuffer(const size_t bufferSize) : size(bufferSize) {
                samples = new SampleBufferElem[size];
                Reset();
        }
        virtual ~SampleBuffer() {
                delete[] samples;
        }

        void Reset() { currentFreeSample = 0; };
        bool IsFull() const { return (currentFreeSample >= size); }

        void SplatSample(const float scrX, const float scrY, const Spectrum &radiance) {
                // Safety check
                if (!radiance.IsNaN()) {
                        SampleBufferElem *s = &samples[currentFreeSample++];

                        s->screenX = scrX;
                        s->screenY = scrY;
                        s->radiance = radiance;
                }/* else {
                        cerr << "Internal error: NaN in SampleBuffer::SplatSample()" << endl;
                }*/
        }

        SampleBufferElem *GetSampleBuffer() const { return samples; }

        size_t GetSampleCount() const { return currentFreeSample; }
        size_t GetSize() const { return size; }

private:
        size_t size;
        size_t currentFreeSample;

        SampleBufferElem *samples;
};

}

#endif  /* _SAMPLEBUFFER_H */

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