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#include "IplImageWidget.h"
#include <QImage>
#include <QPainter>
#include <QMutexLocker>
#include <QMutex>
struct IplImageWidgetData
{
IplImageWidgetData() : iplImage(NULL), mutex(QMutex::Recursive) {};
IplImage* iplImage;
QImage qtImage;
QMutex mutex;
};
IplImageWidget::IplImageWidget(QWidget* parent, Qt::WFlags fl)
: QWidget(parent, fl)
{
d = new IplImageWidgetData;
}
IplImageWidget::~IplImageWidget()
{
delete d;
}
void IplImageWidget::initImages(IplImage* image)
{
try
{
QMutexLocker locker(&d->mutex);
if(d->iplImage)
{
cvReleaseImage(&d->iplImage);
d->iplImage = NULL;
}
d->iplImage = cvCreateImage(cvSize(image->width, image->height), IPL_DEPTH_8U, 3);
if(!d->iplImage)
throw QString("Error : cvCreateImage() return null.\n");
// feed into QImage
uchar *cv = (uchar*) (d->iplImage->imageData);
d->qtImage = QImage(cv, d->iplImage->width, d->iplImage->height, d->iplImage->widthStep, QImage::Format_RGB888);
// Resize the widget
resize(d->iplImage->width, d->iplImage->height);
}
catch(QString msg)
{
msg += "IplImageWidget::initImages return error\n";
qWarning(msg.toLatin1().data());
return;
}
catch(...)
{
QString msg("IplImageWidget::initImages return error\n");
qWarning(msg.toLatin1().data());
return;
}
}
void IplImageWidget::setIplImage(IplImage* image)
{
try
{
if(!image)
return;
d->mutex.lock();
if(!d->iplImage)
{
initImages(image);
}
// IF the image size changes
if(d->iplImage)
if(image->width != d->iplImage->width || image->height != d->iplImage->height)
{
initImages(image);
}
// convert image to RGB format
switch(image->nChannels)
{
case 1:
cvCvtColor(image, d->iplImage, CV_GRAY2RGB);
break;
case 3:
cvCvtColor(image, d->iplImage, CV_BGR2RGB);
break;
case 4:
cvCvtColor(image, d->iplImage, CV_BGRA2RGB);
break;
}
d->mutex.unlock();
// Post a repaint
update();
}
catch(QString msg)
{
d->mutex.unlock();
msg += "IplImageWidget::setIplImage return error\n";
qWarning(msg.toLatin1().data());
return;
}
catch(...)
{
d->mutex.unlock();
QString msg("IplImageWidget::setIplImage return error\n");
qWarning(msg.toLatin1().data());
return;
}
}
void IplImageWidget::paintEvent(QPaintEvent*)
{
QPainter painter(this);
painter.drawImage(d->qtImage.rect(), d->qtImage);
} |
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