C++ pixelType函数代码示例

bool QGLPixmapData::fromFile(const QString &filename, const char *format,
                             Qt::ImageConversionFlags flags)
{
    if (pixelType() == QPixmapData::BitmapType)
        return QPixmapData::fromFile(filename, format, flags);
    QFile file(filename);
    if (!file.open(QIODevice::ReadOnly))
        return false;
    QByteArray data = file.peek(64);
    bool alpha;
    if (m_texture.canBindCompressedTexture
            (data.constData(), data.size(), format, &alpha)) {
        resize(0, 0);
        data = file.readAll();
        file.close();
        QGLShareContextScope ctx(qt_gl_share_widget()->context());
        QSize size = m_texture.bindCompressedTexture
            (data.constData(), data.size(), format);
        if (!size.isEmpty()) {
            w = size.width();
            h = size.height();
            is_null = false;
            d = 32;
            m_hasAlpha = alpha;
            m_source = QImage();
            m_dirty = isValid();
            return true;
        }
        return false;
    }
    fromImage(QImageReader(&file, format).read(), flags);
    return !isNull();
}

void QGLPixmapData::resize(int width, int height)
{
    if (width == w && height == h)
        return;

    if (width <= 0 || height <= 0) {
        width = 0;
        height = 0;
    }

    w = width;
    h = height;
    is_null = (w <= 0 || h <= 0);
    d = pixelType() == QPixmapData::PixmapType ? 32 : 1;

    if (m_texture.id) {
        QGLShareContextScope ctx(qt_gl_share_context());
        glDeleteTextures(1, &m_texture.id);
        m_texture.id = 0;
    }

    m_source = QImage();
    m_dirty = isValid();
    setSerialNumber(++qt_gl_pixmap_serial);
}

void QMacPixmapData::resize(int width, int height)
{
    setSerialNumber(++qt_pixmap_serial);

    w = width;
    h = height;
    is_null = (w <= 0 || h <= 0);
    d = (pixelType() == BitmapType ? 1 : 32);
    bool make_null = w <= 0 || h <= 0;                // create null pixmap
    if (make_null || d == 0) {
        w = 0;
        h = 0;
        is_null = true;
        d = 0;
        if (!make_null)
            qWarning("Qt: QPixmap: Invalid pixmap parameters");
        return;
    }

    if (w < 1 || h < 1)
        return;

    //create the pixels
    bytesPerRow = w * sizeof(quint32);  // Minimum bytes per row.

    // Quartz2D likes things as a multple of 16 (for now).
    bytesPerRow = COMPTUE_BEST_BYTES_PER_ROW(bytesPerRow);
    macCreatePixels();
}

void QEglGLPixmapData::fromImage(const QImage &image, Qt::ImageConversionFlags flags)
{
    TRACE();
    resize(image.width(), image.height());

    if (pixelType() == BitmapType) {
        m_source = image.convertToFormat(QImage::Format_MonoLSB);

    } else {
        QImage::Format format = QImage::Format_RGB32;
        if (qApp->desktop()->depth() == 16)
            format = QImage::Format_RGB16;

        if (image.hasAlphaChannel() && const_cast<QImage &>(image).data_ptr()->checkForAlphaPixels())
            format = QImage::Format_ARGB32_Premultiplied;;

        m_source = image.convertToFormat(format);
    }

    m_dirty = true;
    m_hasFillColor = false;

    m_hasAlpha = m_source.hasAlphaChannel();
    w = image.width();
    h = image.height();
    is_null = (w <= 0 || h <= 0);
    d = m_source.depth();

    if (m_texture.id) {
        QGLShareContextScope ctx(qt_gl_share_widget()->context());
        glDeleteTextures(1, &m_texture.id);
        m_texture.id = 0;
    }    
}

void QGLPixmapData::fromNativeType(void* pixmap, NativeType type)
{
    if (type == QPixmapData::SgImage && pixmap) {
#if defined(QT_SYMBIAN_SUPPORTS_SGIMAGE) && !defined(QT_NO_EGL)
        RSgImage *sgImage = reinterpret_cast<RSgImage*>(pixmap);

        m_sgImage = new RSgImage;
        m_sgImage->Open(sgImage->Id());

        TSgImageInfo info;
        sgImage->GetInfo(info);

        w = info.iSizeInPixels.iWidth;
        h = info.iSizeInPixels.iHeight;
        d = symbianPixeFormatBitsPerPixel((TUidPixelFormat)info.iPixelFormat);

        m_source = QVolatileImage();
        m_hasAlpha = true;
        m_hasFillColor = false;
        m_dirty = true;
        is_null = (w <= 0 || h <= 0);
#endif
    } else if (type == QPixmapData::FbsBitmap && pixmap) {
        CFbsBitmap *bitmap = reinterpret_cast<CFbsBitmap *>(pixmap);
        QSize size(bitmap->SizeInPixels().iWidth, bitmap->SizeInPixels().iHeight);
        if (size.width() == w && size.height() == h)
            setSerialNumber(++qt_gl_pixmap_serial);
        resize(size.width(), size.height());
        m_source = QVolatileImage(bitmap);
        if (pixelType() == BitmapType) {
            m_source.ensureFormat(QImage::Format_MonoLSB);
        } else if (!knownGoodFormat(m_source.format())) {
            m_source.beginDataAccess();
            QImage::Format format = idealFormat(m_source.imageRef(), Qt::AutoColor);
            m_source.endDataAccess(true);
            m_source.ensureFormat(format);
        }
        m_hasAlpha = m_source.hasAlphaChannel();
        m_hasFillColor = false;
        m_dirty = true;
        d = m_source.depth();
    } else if (type == QPixmapData::VolatileImage && pixmap) {
        // Support QS60Style in more efficient skin graphics retrieval.
        QVolatileImage *img = static_cast<QVolatileImage *>(pixmap);
        if (img->width() == w && img->height() == h)
            setSerialNumber(++qt_gl_pixmap_serial);
        resize(img->width(), img->height());
        m_source = *img;
        m_hasAlpha = m_source.hasAlphaChannel();
        m_hasFillColor = false;
        m_dirty = true;
        d = m_source.depth();
    } else if (type == QPixmapData::NativeImageHandleProvider && pixmap) {
        destroyTexture();
        nativeImageHandleProvider = static_cast<QNativeImageHandleProvider *>(pixmap);
        // Cannot defer the retrieval, we need at least the size right away.
        createFromNativeImageHandleProvider();
    }
}

  /**
   * Construct a tile handler. This will determine a good chunk size to put
   *   into the output cube.
   *
   * @param dataFile The file with cube DN data in it
   * @param virtualBandList The mapping from virtual band to physical band, see
   *          CubeIoHandler's description.
   * @param labels The Pvl labels for the cube
   * @param alreadyOnDisk True if the cube is allocated on the disk, false
   *          otherwise
   */
  CubeTileHandler::CubeTileHandler(QFile * dataFile,
      const QList<int> *virtualBandList, const Pvl &labels, bool alreadyOnDisk)
      : CubeIoHandler(dataFile, virtualBandList, labels, alreadyOnDisk) {

    const PvlObject &core = labels.findObject("IsisCube").findObject("Core");

    if(core.hasKeyword("Format")) {
      setChunkSizes(core["TileSamples"], core["TileLines"], 1);
    }
    else {
      // up to 1MB chunks
      int sampleChunkSize =
          findGoodSize(512 * 4 / SizeOf(pixelType()), sampleCount());
      int lineChunkSize =
          findGoodSize(512 * 4 / SizeOf(pixelType()), lineCount());

      setChunkSizes(sampleChunkSize, lineChunkSize, 1);
    }
  }

void QRasterPlatformPixmap::resize(int width, int height)
{
    QImage::Format format;
    if (pixelType() == BitmapType)
        format = QImage::Format_MonoLSB;
    else
        format = QNativeImage::systemFormat();

    image = QImage(width, height, format);
    w = width;
    h = height;
    d = image.depth();
    is_null = (w <= 0 || h <= 0);

    if (pixelType() == BitmapType && !image.isNull()) {
        image.setColorCount(2);
        image.setColor(0, QColor(Qt::color0).rgba());
        image.setColor(1, QColor(Qt::color1).rgba());
    }

    setSerialNumber(image.cacheKey() >> 32);
}

QPixmap QDirectFBPixmapData::transformed(const QTransform &transform,
                                         Qt::TransformationMode mode) const
{
    if (!surface || transform.type() != QTransform::TxScale
        || mode != Qt::FastTransformation)
    {
        QDirectFBPixmapData *that = const_cast<QDirectFBPixmapData*>(this);
        const QImage *image = that->buffer();
        if (image) { // avoid deep copy
            const QImage transformed = image->transformed(transform, mode);
            that->unlockDirectFB();
            QDirectFBPixmapData *data = new QDirectFBPixmapData(pixelType());
            data->fromImage(transformed, Qt::AutoColor);
            return QPixmap(data);
        }
        return QPixmapData::transformed(transform, mode);
    }

    int w, h;
    surface->GetSize(surface, &w, &h);

    const QSize size = transform.mapRect(QRect(0, 0, w, h)).size();
    if (size.isEmpty())
        return QPixmap();

    QDirectFBPixmapData *data = new QDirectFBPixmapData(pixelType());
    data->resize(size.width(), size.height());

    IDirectFBSurface *dest = data->surface;
    dest->SetBlittingFlags(dest, DSBLIT_NOFX);

    const DFBRectangle srcRect = { 0, 0, w, h };
    const DFBRectangle destRect = { 0, 0, size.width(), size.height() };
    dest->StretchBlit(dest, surface, &srcRect, &destRect);

    return QPixmap(data);
}

/*!
    out-of-place conversion (inPlace == false) will always detach()
 */
void QGLPixmapData::createPixmapForImage(QImage &image, Qt::ImageConversionFlags flags, bool inPlace)
{
    if (image.size() == QSize(w, h))
        setSerialNumber(++qt_gl_pixmap_serial);

    resize(image.width(), image.height());

    if (pixelType() == BitmapType) {
        m_source = image.convertToFormat(QImage::Format_MonoLSB);

    } else {
        QImage::Format format = QImage::Format_RGB32;
        if (qApp->desktop()->depth() == 16)
            format = QImage::Format_RGB16;

        if (image.hasAlphaChannel()
            && ((flags & Qt::NoOpaqueDetection)
                || const_cast<QImage &>(image).data_ptr()->checkForAlphaPixels()))
            format = QImage::Format_ARGB32_Premultiplied;;

        if (inPlace && image.data_ptr()->convertInPlace(format, flags)) {
            m_source = image;
        } else {
            m_source = image.convertToFormat(format);

            // convertToFormat won't detach the image if format stays the same.
            if (image.format() == format)
                m_source.detach();
        }
    }

    m_dirty = true;
    m_hasFillColor = false;

    m_hasAlpha = m_source.hasAlphaChannel();
    w = image.width();
    h = image.height();
    is_null = (w <= 0 || h <= 0);
    d = m_source.depth();

    if (m_texture.id) {
        QGLShareContextScope ctx(qt_gl_share_context());
        glDeleteTextures(1, &m_texture.id);
        m_texture.id = 0;
    }
}

mitk::DataNode::Pointer mitk::Tool::CreateEmptySegmentationNode( Image* original, const std::string& organName, const mitk::Color& color )
{
  // we NEED a reference image for size etc.
  if (!original) return NULL;

  // actually create a new empty segmentation
  PixelType pixelType(mitk::MakeScalarPixelType<DefaultSegmentationDataType>() );
  Image::Pointer segmentation = Image::New();

  if (original->GetDimension() == 2)
  {
    const unsigned int dimensions[] = { original->GetDimension(0), original->GetDimension(1), 1 };
    segmentation->Initialize(pixelType, 3, dimensions);
  }
  else
  {
    segmentation->Initialize(pixelType, original->GetDimension(), original->GetDimensions());
  }

  unsigned int byteSize = sizeof(DefaultSegmentationDataType);
  for (unsigned int dim = 0; dim < segmentation->GetDimension(); ++dim)
  {
    byteSize *= segmentation->GetDimension(dim);
  }
  memset( segmentation->GetData(), 0, byteSize );

  if (original->GetTimeSlicedGeometry() )
  {
    AffineGeometryFrame3D::Pointer originalGeometryAGF = original->GetTimeSlicedGeometry()->Clone();
    TimeSlicedGeometry::Pointer originalGeometry = dynamic_cast<TimeSlicedGeometry*>( originalGeometryAGF.GetPointer() );
    segmentation->SetGeometry( originalGeometry );
  }
  else
  {
    Tool::ErrorMessage("Original image does not have a 'Time sliced geometry'! Cannot create a segmentation.");
    return NULL;
  }

  return CreateSegmentationNode( segmentation, organName, color );
}

void mitk::CorrectorAlgorithm::ItkCalculateDifferenceImage( itk::Image<TPixel, VImageDimension>* originalImage, Image* modifiedMITKImage )
{
  typedef itk::Image<ipMITKSegmentationTYPE, VImageDimension>                     ModifiedImageType;
  typedef itk::Image<short signed int, VImageDimension>                           DiffImageType;
  typedef itk::ImageRegionConstIterator< itk::Image<TPixel,VImageDimension> >     OriginalSliceIteratorType;
  typedef itk::ImageRegionConstIterator< ModifiedImageType >                      ModifiedSliceIteratorType;
  typedef itk::ImageRegionIterator< DiffImageType >                               DiffSliceIteratorType;

  typename ModifiedImageType::Pointer modifiedImage;
  CastToItkImage( modifiedMITKImage, modifiedImage );
  
  // create new image as a copy of the input
  // this new image is the output of this filter class
  typename DiffImageType::Pointer diffImage;
  m_DifferenceImage = Image::New();
  PixelType pixelType( typeid(short signed int) );
  m_DifferenceImage->Initialize( pixelType, 2, modifiedMITKImage->GetDimensions() );
  CastToItkImage( m_DifferenceImage, diffImage );

  // iterators over both input images (original and modified) and the output image (diff)
  ModifiedSliceIteratorType modifiedIterator( modifiedImage, diffImage->GetLargestPossibleRegion() );
  OriginalSliceIteratorType originalIterator( originalImage, diffImage->GetLargestPossibleRegion() );
  DiffSliceIteratorType         diffIterator( diffImage,     diffImage->GetLargestPossibleRegion() );

  modifiedIterator.GoToBegin();
  originalIterator.GoToBegin();
  diffIterator.GoToBegin();
 
  while ( !diffIterator.IsAtEnd() )
  {
    short signed int difference = static_cast<short signed int>( static_cast<signed int>(modifiedIterator.Get()) - 
                                                          static_cast<signed int>(originalIterator.Get())); // not good for bigger values ?!
    diffIterator.Set( difference );
    
    ++modifiedIterator;
    ++originalIterator;
    ++diffIterator;
  }
}

QImage QGLPixmapData::fillImage(const QColor &color) const
{
    QImage img;
    if (pixelType() == BitmapType) {
        img = QImage(w, h, QImage::Format_MonoLSB);

        img.setColorCount(2);
        img.setColor(0, QColor(Qt::color0).rgba());
        img.setColor(1, QColor(Qt::color1).rgba());

        if (color == Qt::color1)
            img.fill(1);
        else
            img.fill(0);
    } else {
        img = QImage(w, h,
                m_hasAlpha
                ? QImage::Format_ARGB32_Premultiplied
                : QImage::Format_RGB32);
        img.fill(PREMUL(color.rgba()));
    }
    return img;
}

void mitk::OverwriteSliceImageFilter::GenerateData()
{
  //
  // this is the place to implement the major part of undo functionality (bug #491)
  // here we have to create undo/do operations
  //
  // WHO is the operation actor? This object may not be destroyed ever (design of undo stack)!
  // -> some singleton method of this filter?
  //
  // neccessary additional objects:
  //  - something that executes the operations
  //  - the operation class (must hold a binary diff or something)
  //  - observer commands to know when the image is deleted (no further action then, perhaps even remove the operations from the undo stack)
  //
  Image::ConstPointer input = ImageToImageFilter::GetInput(0);
  Image::ConstPointer input3D = input;

  Image::ConstPointer slice = m_SliceImage;

  if ( input.IsNull() || slice.IsNull() ) return;

  switch (m_SliceDimension)
  {
    default:
    case 2:
      m_Dimension0 = 0;
      m_Dimension1 = 1;
      break;
    case 1:
      m_Dimension0 = 0;
      m_Dimension1 = 2;
      break;
    case 0:
      m_Dimension0 = 1;
      m_Dimension1 = 2;
      break;
  }

  if ( slice->GetDimension() < 2 || input->GetDimension() > 4 ||
       slice->GetDimension(0) != input->GetDimension(m_Dimension0) ||
       slice->GetDimension(1) != input->GetDimension(m_Dimension1) ||
       m_SliceIndex >= input->GetDimension(m_SliceDimension)
     )
  {
   itkExceptionMacro("Slice and image dimensions differ or slice index is too large. Sorry, cannot work like this.");
   return;
  }

  if ( input->GetDimension() == 4 )
  {
    ImageTimeSelector::Pointer timeSelector = ImageTimeSelector::New();
    timeSelector->SetInput( input );
    timeSelector->SetTimeNr( m_TimeStep );
    timeSelector->UpdateLargestPossibleRegion();
    input3D = timeSelector->GetOutput();
  }

  if ( m_SliceDifferenceImage.IsNull() ||
       m_SliceDifferenceImage->GetDimension(0) != m_SliceImage->GetDimension(0) ||
       m_SliceDifferenceImage->GetDimension(1) != m_SliceImage->GetDimension(1) )
  {
    m_SliceDifferenceImage = mitk::Image::New();
    mitk::PixelType pixelType( mitk::MakeScalarPixelType<short signed int>() );
    m_SliceDifferenceImage->Initialize( pixelType, 2, m_SliceImage->GetDimensions() );
  }

  //MITK_INFO << "Overwriting slice " << m_SliceIndex << " in dimension " << m_SliceDimension << " at time step " << m_TimeStep << std::endl;
  // this will do a long long if/else to find out both pixel types
  AccessFixedDimensionByItk( input3D, ItkImageSwitch, 3 );

  SegmentationInterpolationController* interpolator = SegmentationInterpolationController::InterpolatorForImage( input );
  if (interpolator)
  {
    interpolator->BlockModified(true);
    interpolator->SetChangedSlice( m_SliceDifferenceImage, m_SliceDimension, m_SliceIndex, m_TimeStep );
  }

  if ( m_CreateUndoInformation )
  {
    // create do/undo operations (we don't execute the doOp here, because it has already been executed during calculation of the diff image
    ApplyDiffImageOperation* doOp = new ApplyDiffImageOperation( OpTEST, const_cast<Image*>(input.GetPointer()), m_SliceDifferenceImage, m_TimeStep, m_SliceDimension, m_SliceIndex );
    ApplyDiffImageOperation* undoOp = new ApplyDiffImageOperation( OpTEST, const_cast<Image*>(input.GetPointer()), m_SliceDifferenceImage, m_TimeStep, m_SliceDimension, m_SliceIndex );
    undoOp->SetFactor( -1.0 );
    OperationEvent* undoStackItem = new OperationEvent( DiffImageApplier::GetInstanceForUndo(), doOp, undoOp, this->EventDescription(m_SliceDimension, m_SliceIndex, m_TimeStep) );
    UndoController::GetCurrentUndoModel()->SetOperationEvent( undoStackItem );
  }

  // this image is modified (good to know for the renderer)
  input->Modified();

  if (interpolator)
  {
    interpolator->BlockModified(false);
  }
}

/**
 * Handles "PixelType" property.
 */
int MUCamSource::OnPixelType(MM::PropertyBase* pProp, MM::ActionType eAct)
{
    if (eAct == MM::AfterSet)
    {
        string val;
        pProp->Get(val);
        if (val.compare(g_PixelType_8bit) == 0)
        {
            MUCam_setBitCount(hCameras_[currentCam_], 8);
            bytesPerPixel_ = 1;
            bitCnt_ = 8;
        }
        else if (val.compare(g_PixelType_16bit) == 0)
        {
            MUCam_setBitCount(hCameras_[currentCam_], 16);
            bytesPerPixel_ = 2;
            bitCnt_ = 16;
        }
        else if (val.compare(g_PixelType_32bitRGB) == 0)
        {
            MUCam_setBitCount(hCameras_[currentCam_], 8);
            bytesPerPixel_ = 4;
            bitCnt_ = 24;
        }
        else if (val.compare(g_PixelType_64bitRGB) == 0)
        {
            MUCam_setBitCount(hCameras_[currentCam_], 16);
            bytesPerPixel_ = 8;
            bitCnt_ = 48;
        }
        else
            assert(false);
        ////////////////////////////////
        
        ////////////////////////////////////////////////////////////////////////
        
        char buf[MM::MaxStrLength];
        GetProperty(MM::g_Keyword_PixelType, buf);
        std::string pixelType(buf);
        if (pixelType.compare(g_PixelType_8bit) == 0)
        {
            if(bytesPerPixel_ == 2)
            {
                SetProperty(MM::g_Keyword_PixelType, g_PixelType_16bit);
            }
            else if(bytesPerPixel_ == 4)
            {
                SetProperty(MM::g_Keyword_PixelType, g_PixelType_32bitRGB);
            }
            else if(bytesPerPixel_ == 8)
            {
                SetProperty(MM::g_Keyword_PixelType, g_PixelType_64bitRGB);
            }
        }
        else if (pixelType.compare(g_PixelType_16bit) == 0)
        {
            if(bytesPerPixel_ == 1)
            {
                SetProperty(MM::g_Keyword_PixelType, g_PixelType_8bit);
            }
            else if(bytesPerPixel_ == 4)
            {
                SetProperty(MM::g_Keyword_PixelType, g_PixelType_32bitRGB);
            }
            else if(bytesPerPixel_ == 8)
            {
                SetProperty(MM::g_Keyword_PixelType, g_PixelType_64bitRGB);
            }
        }
        else if (pixelType.compare(g_PixelType_32bitRGB) == 0)
        {
            if(bytesPerPixel_ == 1)
            {
                SetProperty(MM::g_Keyword_PixelType, g_PixelType_8bit);
            }
            else if(bytesPerPixel_ == 2)
            {
                SetProperty(MM::g_Keyword_PixelType, g_PixelType_16bit);
            }
            else if(bytesPerPixel_ == 8)
            {
                SetProperty(MM::g_Keyword_PixelType, g_PixelType_64bitRGB);
            }
        }
        else if (pixelType.compare(g_PixelType_64bitRGB) == 0)
        {
            if(bytesPerPixel_ == 1)
            {
                SetProperty(MM::g_Keyword_PixelType, g_PixelType_8bit);
            }
            else if(bytesPerPixel_ == 2)
            {
                SetProperty(MM::g_Keyword_PixelType, g_PixelType_16bit);
            }
            else if(bytesPerPixel_ == 4)
            {
                SetProperty(MM::g_Keyword_PixelType, g_PixelType_32bitRGB);
//.........这里部分代码省略.........

QPixmapData *QMacPixmapData::createCompatiblePixmapData() const
{
    return new QMacPixmapData(pixelType());
}