BOOL CNCaptureView::GetImageByRect(const CRect& rcSrc, CImage& Image)
{
if (m_pImage)
{
CImageDC dcImage(Image);
DrawObjects(m_canvasImage.GetMemoryDC());
BitBlt(dcImage, 0, 0, rcSrc.Width(), rcSrc.Height(), m_canvasImage.GetMemoryDC(), rcSrc.left, rcSrc.top, SRCCOPY);
CRect rcImage(0, 0, m_pImage->GetWidth(), m_pImage->GetHeight());
m_pImage->Draw(m_canvasImage, rcImage);
return TRUE;
}
return FALSE;
}
void MainWindow::shareDesktopUpdate()
{
// time the frame
QTime frameTime;
frameTime.start();
const int w = width_ * deviceScale_;
const int h = height_ * deviceScale_;
// take screenshot
QPixmap desktopPixmap =
QPixmap::grabWindow( QApplication::desktop()->winId(), x_, y_, w, h );
if( desktopPixmap.isNull( ))
{
handleStreamingError("Got NULL desktop pixmap");
return;
}
QImage image = desktopPixmap.toImage();
// render mouse cursor
QPoint mousePos = ( QCursor::pos() - QPoint( x_, y_ )) * deviceScale_ -
QPoint( cursor_.width()/2, cursor_.height()/2);
QPainter painter( &image );
painter.drawImage( mousePos, cursor_ );
painter.end(); // Make sure to release the QImage before using it to update the segements
// QImage Format_RGB32 (0xffRRGGBB) corresponds in fact to GL_BGRA == dc::BGRA
dc::ImageWrapper dcImage((const void*)image.bits(), image.width(), image.height(), dc::BGRA);
dcImage.compressionPolicy = dc::COMPRESSION_ON;
bool success = dcStream_->send(dcImage) && dcStream_->finishFrame();
if( !success )
{
handleStreamingError("Streaming failure, connection closed.");
return;
}
regulateFrameRate(frameTime.elapsed());
}
