void GraphicColumnWidget::slotExportToJpg() {
QString fn = QFileDialog::getSaveFileName(this,
tr("Export Profile To JPG..."),
QDir::currentPath(),
tr("JPG Files (*.jpg *.JPG)"));
if (fn.isEmpty()) {
return;
}
QImageWriter w;
w.setFileName(fn);
w.setFormat("JPG");
w.setQuality(100);
QImage img(QSize((int)(_scene->width()), (int)(_scene->height())), QImage::Format_RGB32);
QPainter painter(&img);
painter.setRenderHint(QPainter::Antialiasing);
_scene->render(&painter);
painter.end();
if (w.write(img)) {
QMessageBox::information(this, tr("Export Completed"),
tr("Profile exported to <b>%1</b>.").arg(fn));
} else {
QMessageBox::critical(this, tr("Export Failed"),
tr("Could not export Profile: %1").arg(w.errorString()));
}
}
static QByteArray randomJPEGByteArray(int w=512, int h=512, int q=85 )
{
QImage image=randomImage(w,h);
QBuffer bu;
bu.open(QBuffer::WriteOnly);
QImageWriter iw;
iw.setFormat("jpeg");
iw.setDevice(&bu);
iw.setOptimizedWrite(true );
iw.setQuality(q);
iw.setCompression(9);
iw.setProgressiveScanWrite(true );
iw.write( image );
bu.close();
QByteArray ba=bu.buffer();
//utility::byteArrayToFile("random_test.jpeg",ba );
//qDebug()<<"Random JPEG image of size "<<w<<"x"<<h<<" was "<< utility::humanReadableSize(ba.size())<< "("<<(qreal)ba.size()/((qreal)w*h) << " bytes/pixel)";
return ba;
}
void OpenGLHelpers::takeSnapshot(QString filename, int width, int height, int startY){
uchar * imageData = new uchar[4*width * height];
glReadPixels(0, startY,width, height,GL_BGRA,GL_UNSIGNED_BYTE,(void *)imageData);
int * vals = (int*)imageData, * lo, * hi;
for(int row = 0; row < height/2; ++row){
hi = vals+row*width;
lo = vals + (height - 1 - row)*width;
for(int i = 0; i < width ; ++i)
std::swap(hi[i],lo[i]);
}
QImage img = QImage(imageData,width,height,QImage::Format_ARGB32);
QImageWriter * writer = new QImageWriter(filename);
writer->setFormat("jpg");
writer->setQuality(100);
writer->write(img);
delete writer;
delete [] imageData;
}
