VintaSoft Imaging .NET SDK 14.1: Документация для .NET разработчика
Vintasoft.Imaging.Codecs.Decoders Namespace / IVectorDecoder Interface
Члены типа Объект Синтаксис Example Иерархия Требования Смотрите также
    IVectorDecoder Интерфейс
    Определяет интерфейс для векторного декодера.
    Объектаня модель
    IVectorDecoder
    Синтаксис
    'Declaration
    
    Public Interface IVectorDecoder
    
    
     
    Пример

    Вот пример, показывающий, как получить центральную область PDF страницы, увеличенную в 4 раза:

    ''' <summary>
    ''' Returns an enlarged image of the central region of PDF page.
    ''' </summary>
    Public Shared Function GetEnlargedImageOfPdfPageRegion(filename As String, pageIndex As Integer) As Vintasoft.Imaging.VintasoftImage
        Using stream As System.IO.Stream = New System.IO.FileStream(filename, System.IO.FileMode.Open, System.IO.FileAccess.Read)
            Using decoder As New Vintasoft.Imaging.Codecs.Decoders.PdfDecoder(stream)
                ' settings for page rendering
                Dim renderingSettings As Vintasoft.Imaging.Codecs.Decoders.RenderingSettings = Vintasoft.Imaging.Codecs.Decoders.RenderingSettings.Empty
                ' get page info
                Dim pageInfo As Vintasoft.Imaging.Codecs.Decoders.ImageInfo = decoder.GetImageInfo(pageIndex, renderingSettings, Nothing)
    
                ' determine region on page
                Dim x As Single = 3F * pageInfo.Width / 8F
                Dim y As Single = 3F * pageInfo.Height / 8F
                Dim width As Single = pageInfo.Width / 4F
                Dim height As Single = pageInfo.Height / 4F
                Dim rect As New System.Drawing.RectangleF(x, y, width, height)
    
                ' get the central region with size of 1/4 page and scale 4
                Return decoder.GetImage(pageIndex, rect, 4F, Nothing, renderingSettings, Nothing, _
                    Nothing)
            End Using
        End Using
    End Function
    
    
    /// <summary>
    /// Returns an enlarged image of the central region of PDF page.
    /// </summary>
    public static Vintasoft.Imaging.VintasoftImage GetEnlargedImageOfPdfPageRegion(string filename, int pageIndex)
    {
        using (System.IO.Stream stream =
            new System.IO.FileStream(filename, System.IO.FileMode.Open, System.IO.FileAccess.Read))
        {
            using (Vintasoft.Imaging.Codecs.Decoders.PdfDecoder decoder =
                new Vintasoft.Imaging.Codecs.Decoders.PdfDecoder(stream))
            {
                // settings for page rendering
                Vintasoft.Imaging.Codecs.Decoders.RenderingSettings renderingSettings =
                    Vintasoft.Imaging.Codecs.Decoders.RenderingSettings.Empty;
                // get page info
                Vintasoft.Imaging.Codecs.Decoders.ImageInfo pageInfo = decoder.GetImageInfo(pageIndex, renderingSettings, null);
    
                // determine region on page
                float x = 3f * pageInfo.Width / 8f;
                float y = 3f * pageInfo.Height / 8f;
                float width = pageInfo.Width / 4f;
                float height = pageInfo.Height / 4f;
                System.Drawing.RectangleF rect = new System.Drawing.RectangleF(x, y, width, height);
    
                // get the central region with size of 1/4 page and scale 4
                return decoder.GetImage(pageIndex, rect, 4f, null, renderingSettings, null, null);
            }
        }
    }
    
    

    Иерархия наследования

    Vintasoft.Imaging.Codecs.Decoders.IVectorDecoder

    Требования

    Целевые платформы: .NET 9; .NET 8; .NET 7; .NET 6; .NET Framework 4.8, 4.7, 4.6, 4.5, 4.0, 3.5

    Смотрите также