/* Copyright (c) 2012 Patrick Ruoff
 * Copyright (c) 2014-2016 Stanislaw Halik <sthalik@misaki.pl>
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 */

#include "pt_video_widget.h"
#include <opencv2/imgproc.hpp>

#include "opentrack/is-window-visible.hpp"

PTVideoWidget::PTVideoWidget(QWidget* parent) :
    QWidget(parent),
    freshp(false)
{
    connect(&timer, SIGNAL(timeout()), this, SLOT(update_and_repaint()));
    timer.start(50);
}

void PTVideoWidget::update_image(const cv::Mat& frame)
{
    QMutexLocker foo(&mtx);

    if (!freshp)
    {
        if (_frame.cols != frame.cols || _frame.rows != frame.rows)
        {
            _frame = cv::Mat(frame.rows, frame.cols, CV_8U);
            _frame2 = cv::Mat(frame.rows, frame.cols, CV_8U);
        }
        frame.copyTo(_frame);
        freshp = true;
    }
}

void PTVideoWidget::paintEvent(QPaintEvent* e)
{
    QMutexLocker foo(&mtx);
    QPainter painter(this);
    painter.drawImage(e->rect(), texture);
}

void PTVideoWidget::update_and_repaint()
{
    if (is_window_visible(this))
    {
        QMutexLocker foo(&mtx);
        if (_frame.empty() || !freshp)
            return;
        cv::cvtColor(_frame, _frame2, cv::COLOR_RGB2BGR);

        if (_frame3.cols != width() || _frame3.rows != height())
            _frame3 = cv::Mat(height(), width(), CV_8U);

        cv::resize(_frame2, _frame3, cv::Size(width(), height()), 0, 0, cv::INTER_NEAREST);

        texture = QImage((const unsigned char*) _frame3.data, _frame3.cols, _frame3.rows, QImage::Format_RGB888);
        freshp = false;
        update();
    }
}