progressbar.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 LIGHTMETRICA_PROGRESS_BAR_H
#define LIGHTMETRICA_PROGRESS_BAR_H

#include <lightmetrica/common.h>
#include <string>
#include <mutex>
#include <atomic>
#include <condition_variable>

LM_NAMESPACE_BEGIN

class ProgressBar
{
public:

    ProgressBar() {}

private:

    LM_DISABLE_COPY_AND_MOVE(ProgressBar);

public:

    void SetConsoleWidth(int consoleWidth);
    void Begin(const std::string& taskName);
    void End();
    void Abort();
    void OnReportProgress(double progress, bool done);
    void RequestUpdateProgress();
    void ProcessProgressOutput();

private:

    std::atomic<bool> enableProgressBar;
    std::atomic<bool> requiresProgressUpdate;
    bool progressPrintDone;
    bool progressDone;
    double progress;
    std::mutex progressMutex;
    std::string progressTaskName;
    std::condition_variable progressDoneCond;
    void* consoleHandle;
    int consoleWidth;

};

LM_NAMESPACE_END

#endif // LIGHTMETRICA_PROGRESS_BAR_H