Qt 导出图像（代码保存）

bool CSSCEViewerMainFrame::SaveCurrentPageToPicture( int eType, QSize szDest )

{

    QImage image( szDest, QImage::Format_RGB32 );

    ExportCurrentPageToBMP( image, szDest );

    CSSEMainViewPro* pView = m_pMultiViewManager->GetFirstValidView( true );

    QString strFileName;

    strFileName = QString("%1_[%2]_%3").arg( pView == NULL ? "" : pView->GetDcmTagValueList( "0010,0020_0010,0010_0010,0040_0010,1010_0008,0060_0008,0020", "_" ) )

            .arg( CSSECfgSessionInfo::GetUserName() ).arg( CSpiderGUID::HashPJW() );

    QString str = m_pCfgFileDirectory->GetDirectory( "DIRECTORY_GLOBAL_EXPORT", true );

	str.replace("/","\\");

    QString strDir, strExtFilname;

    switch( eType )

    {

        case IDN_METRO_EXPORT_IMAGEFILE_BTN_JPEG:

        {

            strFileName = str + "JPEG" + "\\" + strFileName + "." + "jpeg" ;

            strDir = str + "JPEG";

            strExtFilname = "JPEG";

        }

            break;

        case IDN_METRO_EXPORT_IMAGEFILE_BTN_BMP:

        {

            strFileName = str + "BMP" + "\\" + strFileName + "." + "bmp" ;

            strDir = str + "BMP";

            strExtFilname = "BMP";

        }

            break;

        case IDN_METRO_EXPORT_IMAGEFILE_BTN_PNG:

        {

            strFileName = str + "PNG" + "\\" + strFileName + "." + "png" ;

            strDir = str + "PNG";

            strExtFilname = "PNG";

        }

            break;

        case IDN_METRO_EXPORT_IMAGEFILE_BTN_TIFF:

        {

            strFileName = str + "TIFF" + "\\" + strFileName + "." + "tiff" ;

            strDir = str + "TIFF";

            strExtFilname = "TIFF";

        }

            break;

        case IDN_METRO_EXPORT_IMAGEFILE_BTN_PGM:

        {

            strFileName = str + "PGM" + "\\" + strFileName + "." + "pgm" ;

            strDir = str + "PGM";

            strExtFilname = "PGM";

        }

            break;

        case IDN_METRO_EXPORT_IMAGEFILE_BTN_PPM:

        {

            strFileName = str + "PPM" + "\\" + strFileName + "." + "ppm" ;

            strDir = str + "PPM";

            strExtFilname = "PPM";

        }

            break;

    }

    QDir *imageDir = new QDir( strDir );

    bool exist = imageDir->exists( strDir );

    if( !exist )

    {

      imageDir->mkpath( strDir );

    }

    delete imageDir;

    imageDir = NULL;

    bool  bResult = false;

    bResult = image.save( strFileName );

    if( bResult )

    {

        m_hitText  = new  CSSCEViewerLabel( this , strFileName );

    }

    else

    {

        m_hitText  = new  CSSCEViewerLabel( this , "图像导出失败！" );

    }

    return bResult;

}

 ExportCurrentPageToBMP( image, szDest )  调用   

ExportCurrentPage  函数

bool CSSCEBaseExMultiViewManager::ExportCurrentPage( QSize szImage, QImage* pImage )

{

    float fScaleX = float(szImage.width()) / float(m_rcRealClient.width());

    float fScaleY = float(szImage.height()) / float(m_rcRealClient.height());

    float fScale = fScaleX > fScaleY ? fScaleX : fScaleY;

    QVector<QRect> vtrLayout;

    int	nFirstView;

    GetCurrentPageLayout( QRect( QPoint(0,0), szImage ), vtrLayout, nFirstView );  // 获得不同分格的View窗口布局，许多个小窗格

    QPainter pPainter(pImage);

    pPainter.setRenderHint(QPainter::Antialiasing, false);

    pPainter.setRenderHint(QPainter::HighQualityAntialiasing, false);

    for( int i=0; i< vtrLayout.size(); i++ )           //把View中每个小的窗格画到不同的QImage上，再把这些小的QImage画到同一个大的QImage上

    {

        QRect rcNew = vtrLayout[i];

        QImage signalImage( rcNew.size(), QImage::Format_RGB32 );

        QImage * psignalImage = &signalImage;

        CSSEMainView * pView = GetView(nFirstView+i);

        pView->DrawCoreToQImage( psignalImage, QRect( QPoint(0,0), rcNew.size() ) , fScale );

        pPainter.drawImage( QRectF(rcNew), *psignalImage, QRectF(psignalImage->rect()) );

    }

    return true;

}

DrawCoreToQImage 调用 DrawCoreToUnknow  函数

void CSSEMainView::DrawCoreToUnknow( QPainter* pPainter, QImage* &pImage, bool bToPainter, QRect rcNewSize, float fScale )

{    

	if ( m_pSSEImage->IsValid() )

	{//BEGIN

		QRect rcOrgView = m_rcClient;

		float fOrgZoomScale = m_pSSEImage->GetZoomScale();

		// 图像先放大

		if( fScale != 1.0f )

		{

			m_rcClient = rcNewSize;

			m_pSSEImage->OnSize( m_rcClient );

			m_pSSEImage->ZoomImageEx( fScale );

		}

		if( bToPainter )

		{

			QDateTime dtStart = QDateTime::currentDateTime();

			QPainter* pLocalPainter = NULL;

			if( pPainter == NULL )

			{

				pLocalPainter = new QPainter(this);

				pPainter = pLocalPainter;

			}

			pPainter->setRenderHint(QPainter::Antialiasing, false);

			pPainter->setRenderHint(QPainter::HighQualityAntialiasing, false);

#if defined(WIN32)

			pPainter->setRenderHint(QPainter::SmoothPixmapTransform, !CMouseUtility::IsAnyButtonDown() );

            pPainter->drawImage( m_pSSEImage->GetDisplayImageViewRect().toRect(), *(m_pSSEImage->GetMappedImage()), m_pSSEImage->GetDisplayImageVisibleRect() );

//			pPainter->drawPixmap( m_pSSEImage->GetDisplayImageViewRect(), *(m_pSSEImage->GetDisplayImage()), m_pSSEImage->GetDisplayImageVisibleRect() );

#else

			pPainter->setRenderHint(QPainter::SmoothPixmapTransform, !CMouseUtility::IsAnyButtonDown() );

            pPainter->drawImage( m_pSSEImage->GetDisplayImageViewRect().toRect(), *(m_pSSEImage->GetMappedImage()), m_pSSEImage->GetDisplayImageVisibleRect() );

#endif

            //if( !CMouseUtility::IsAnyButtonWorking() )zqj

			{

				DrawElements( pPainter );

			}

			{

//				QDateTime dtCurrent = QDateTime::currentDateTime();

//				QPen pen( QColor( 255, 100, 0 ) );

//				pPainter->setPen(pen);

//				pLocalPainter->drawText( QPoint( 10, 20 ), QString::number( dtStart.msecsTo( dtCurrent  ) ) );

//				dtStart = dtCurrent;

//				qDebug() << "Draw View: " <<  m_nViewID;

			}

			if( pLocalPainter != NULL )

			{

				delete pLocalPainter;

			}

		}

		else

		{

            if( pImage == NULL )

            {

              pImage = new QImage( m_rcClient.size(), QImage::Format_RGB32 );

            }

            QPainter localPainter(pImage);

            localPainter.setRenderHint(QPainter::Antialiasing, true);

            localPainter.setRenderHint(QPainter::HighQualityAntialiasing, true);

            localPainter.setRenderHint(QPainter::SmoothPixmapTransform, true );

            localPainter.drawImage(m_pSSEImage->GetDisplayImageViewRect(), *(m_pSSEImage->GetMappedImage()), m_pSSEImage->GetDisplayImageVisibleRect() );

            DrawElements( &localPainter );

		}

		// 图像缩小

		if( fScale != 1.0f )

		{

			m_rcClient = rcOrgView;

			m_pSSEImage->OnSize( m_rcClient );

			m_pSSEImage->ZoomImage( fOrgZoomScale );

		}

	}//END

	else

	{

		QRect rcOrgView = m_rcClient;

		// 图像先放大

		if( fScale != 1.0f )

		{

			m_rcClient = rcNewSize;

		}

		if( bToPainter )

		{

			QPainter* pLocalPainter = NULL;

			if( pPainter == NULL )

			{

				pLocalPainter = new QPainter(this);

				pPainter = pLocalPainter;

			}

            DrawElements( pPainter );

			// 绘制外边框

            {

                QPen pen( QColor( 109, 140, 231, 255 ) );

				pPainter->setPen( pen );

                //liyanbo 画笔和预留一个像素

//                pPainter->drawRect( rect().adjusted( 0, 0, -1, -1 )  );

			}

			delete pLocalPainter;

		}

		else

		{

            if( pImage == NULL )

            {

                pImage = new QImage( m_rcClient.size(), QImage::Format_RGB32 );

            }

			QPainter localPainter(pImage);

			DrawElements( &localPainter );

		}

		// 图像缩小

		if( fScale != 1.0f )

		{

			m_rcClient = rcOrgView;

		}

	}

}