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/*********************************************************************************
NixNote - An open-source client for the Evernote service.
Copyright (C) 2013 Randy Baumgarte
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 2
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, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
***********************************************************************************/
// Disclaimer!! A lot of this code is based on samples at:
// http://dournac.org/info/canny_edge
// http://opencv-srf.blogspot.com/2011/09/capturing-images-videos.html
// http://develnoter.blogspot.com/
// http://umanga.wordpress.com/2010/04/19/how-to-covert-qt-qimage-into-opencv-iplimage-and-wise-versa/
#include "cvimagewidget.h"
#include <opencv2/opencv.hpp>
CVImageWidget::CVImageWidget(QWidget *parent) :
QWidget(parent)
{
}
QSize CVImageWidget::sizeHint() { return _qimage.size(); }
QSize CVImageWidget::minimumSizeHint() { return _qimage.size(); }
void CVImageWidget::showImage(const cv::Mat& image) {
// Convert the image to the RGB888 format
switch (image.type()) {
case CV_8UC1:
cvtColor(image, _tmp, CV_GRAY2RGB);
break;
case CV_8UC3:
cvtColor(image, _tmp, CV_BGR2RGB);
break;
}
// QImage needs the data to be stored continuously in memory
assert(_tmp.isContinuous());
// Assign OpenCV's image buffer to the QImage. Note that the bytesPerLine parameter
// (http://qt-project.org/doc/qt-4.8/qimage.html#QImage-6) is 3*width because each pixel
// has three bytes.
_qimage = QImage(_tmp.data, _tmp.cols, _tmp.rows, _tmp.cols*3, QImage::Format_RGB888);
this->setFixedSize(image.cols, image.rows);
repaint();
}
void CVImageWidget::paintEvent(QPaintEvent* /*event*/) {
// Display the image
QPainter painter(this);
painter.drawImage(QPoint(0,0), _qimage);
painter.end();
}
bool CVImageWidget::getImage(QImage &image) {
if (_qimage.width() == 0 || _qimage.height() == 0)
return false;
image = _qimage;
return true;
}
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