rewindablesampler.h

/*
    Lightmetrica : A research-oriented renderer

    Copyright (c) 2014 Hisanari Otsu

    This program 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.

    This program 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/>.
*/

#pragma once
#ifndef LIB_LIGHTMETRICA_REWINDABLE_SAMPLER_H
#define LIB_LIGHTMETRICA_REWINDABLE_SAMPLER_H

#include "sampler.h"
#include "random.h"

LM_NAMESPACE_BEGIN

class RewindableSampler : public Sampler
{
public:

    LM_COMPONENT_INTERFACE_DEF("rewindablesampler");

public:

    RewindableSampler() {};
    virtual ~RewindableSampler() {}

public:

    virtual void Configure(Random* rng) = 0;

    virtual void Rewind(int index) = 0;

    virtual int SampleIndex() const = 0;

};

LM_NAMESPACE_END

#endif // LIB_LIGHTMETRICA_REWINDABLE_SAMPLER_H