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/* 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 "video-widget.hpp"
#include <opencv2/imgproc.hpp>
cv_video_widget::cv_video_widget(QWidget* parent) :
QWidget(parent), freshp(false)
{
connect(&timer, SIGNAL(timeout()), this, SLOT(update_and_repaint()), Qt::DirectConnection);
timer.start(65);
}
void cv_video_widget::update_image(const cv::Mat& frame)
{
QMutexLocker l(&mtx);
if (!freshp)
{
const int w = preview_size.width(), h = preview_size.height();
if (w < 1 || h < 1)
return;
if (_frame.cols != frame.cols || _frame.rows != frame.rows)
_frame = cv::Mat(frame.rows, frame.cols, CV_8UC3);
frame.copyTo(_frame);
freshp = true;
if (_frame2.cols != _frame.cols || _frame2.rows != _frame.rows)
_frame2 = cv::Mat(_frame.rows, _frame.cols, CV_8UC4);
if (_frame3.cols != w || _frame3.rows != h)
_frame3 = cv::Mat(h, w, CV_8UC4);
cv::cvtColor(_frame, _frame2, cv::COLOR_BGR2BGRA);
const cv::Mat* img_;
if (_frame.cols != w || _frame.rows != h)
{
cv::resize(_frame2, _frame3, cv::Size(w, h), 0, 0, cv::INTER_NEAREST);
img_ = &_frame3;
}
else
img_ = &_frame2;
const cv::Mat& img = *img_;
texture = QImage((const unsigned char*) img.data, w, h, QImage::Format_ARGB32_Premultiplied);
}
}
void cv_video_widget::paintEvent(QPaintEvent*)
{
QMutexLocker foo(&mtx);
QPainter painter(this);
painter.drawImage(rect(), texture);
}
void cv_video_widget::update_and_repaint()
{
QMutexLocker l(&mtx);
preview_size = size();
if (freshp)
{
freshp = false;
update();
}
}
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