VintaSoft Imaging .NET SDK v8.7
Vintasoft.Imaging.Codecs.ImageFiles Namespace / IRasterGridEditor Interface
Members Example



In This Topic
    IRasterGridEditor Interface
    In This Topic
    Defines an interface for raster image editor, which can replace image rectangle without reencoding of whole image.
    Object Model
    IRasterGridEditor Interface
    Syntax
    'Declaration
     
    Public Interface IRasterGridEditor 
    public interface IRasterGridEditor 
    public __gc __interface IRasterGridEditor 
    public interface class IRasterGridEditor 
    Example
    This example shows how to get the first tile of specified TIFF page from specified file, rotate it 180 degrees, write back to its region, and saves changes back to the TIFF file.
    ''' <summary>
    ''' Gets an image of first tile of TIFF page,
    ''' rotates the tile image 180 degrees,
    ''' sets changed tile image as new image of first tile,
    ''' saves changes to the source TIFF file.
    ''' </summary>
    Public Shared Sub ChangeTileOfTiffPage(tiffFilename As String, pageIndex As Integer)
        Using stream As System.IO.Stream = New System.IO.FileStream(tiffFilename, System.IO.FileMode.Open, System.IO.FileAccess.ReadWrite)
            Using decoder As New Vintasoft.Imaging.Codecs.Decoders.TiffDecoder(stream)
                ' get raster grid editor
                Dim rasterGridEditor As Vintasoft.Imaging.Codecs.ImageFiles.IRasterGridEditor = decoder.GetRasterGridEditor()
                ' get grid of raster regions
                Dim grid As System.Drawing.Rectangle() = rasterGridEditor.GetRasterEditorGrid(pageIndex)
                If grid Is Nothing OrElse grid.Length = 0 Then
                    Throw New System.Exception("Image tiles cannot be changed.")
                End If
                
                ' index of the region to change
                Dim rectIndex As Integer = 0
                ' get region to change
                Dim region As System.Drawing.Rectangle = grid(rectIndex)
                ' image of changing region
                Dim regionImage As Vintasoft.Imaging.VintasoftImage
                ' create image renderer
                Using renderer As New Vintasoft.Imaging.ImageRendering.ImageRenderer(decoder, pageIndex)
                    ' create region rendering task
                    Dim renderingTask As Vintasoft.Imaging.ImageRendering.ImageRenderingTask = Vintasoft.Imaging.ImageRendering.ImageRenderingTask.CreateImageRegion(region)
                    ' set to convert to the source format
                    renderingTask.ConvertDestImageToSourceFormat = True
                    ' get an image of first tile
                    regionImage = renderer.ExecuteRendering(renderingTask)
                End Using
                
                ' rotate the tile image 180 degrees
                regionImage.Flip(Vintasoft.Imaging.ImageProcessing.Transforms.ImageRotateFlipType.Rotate180FlipNone)
                
                ' set the tile image as new image of first tile
                rasterGridEditor.SetImageRect(pageIndex, rectIndex, regionImage, Nothing)
                regionImage.Dispose()
                
                ' save changes to the source TIFF file
                rasterGridEditor.SaveChanges(Nothing)
            End Using
        End Using
    /// <summary>
    /// Gets an image of first tile of TIFF page,
    /// rotates the tile image 180 degrees,
    /// sets changed tile image as new image of first tile,
    /// saves changes to the source TIFF file.
    /// </summary>
    public static void ChangeTileOfTiffPage(string tiffFilename, int pageIndex)
    {
        using (System.IO.Stream stream = new System.IO.FileStream(
            tiffFilename, System.IO.FileMode.Open, System.IO.FileAccess.ReadWrite))
        {
            using (Vintasoft.Imaging.Codecs.Decoders.TiffDecoder decoder =
                new Vintasoft.Imaging.Codecs.Decoders.TiffDecoder(stream))
            {
                // get raster grid editor
                Vintasoft.Imaging.Codecs.ImageFiles.IRasterGridEditor rasterGridEditor = decoder.GetRasterGridEditor();
                // get grid of raster regions
                System.Drawing.Rectangle[] grid = rasterGridEditor.GetRasterEditorGrid(pageIndex);
                if (grid == null || grid.Length == 0)
                    throw new System.Exception("Image tiles cannot be changed.");
                
                // index of the region to change
                int rectIndex = 0;
                // get region to change
                System.Drawing.Rectangle region = grid[rectIndex];
                // image of changing region
                Vintasoft.Imaging.VintasoftImage regionImage;
                // create image renderer
                using (Vintasoft.Imaging.ImageRendering.ImageRenderer renderer =
                    new Vintasoft.Imaging.ImageRendering.ImageRenderer(decoder, pageIndex))
                {
                    // create region rendering task
                    Vintasoft.Imaging.ImageRendering.ImageRenderingTask renderingTask =
                        Vintasoft.Imaging.ImageRendering.ImageRenderingTask.CreateImageRegion(region);
                    // set to convert to the source format
                    renderingTask.ConvertDestImageToSourceFormat = true;
                    // get an image of first tile
                    regionImage = renderer.ExecuteRendering(renderingTask);
                }
                
                // rotate the tile image 180 degrees
                regionImage.Flip(Vintasoft.Imaging.ImageProcessing.Transforms.ImageRotateFlipType.Rotate180FlipNone);
                
                // set the tile image as new image of first tile
                rasterGridEditor.SetImageRect(pageIndex, rectIndex, regionImage, null);
                regionImage.Dispose();
                
                // save changes to the source TIFF file
                rasterGridEditor.SaveChanges(null);
            }
        }
    Requirements

    Target Platforms: Windows 10, Windows 8, Windows 7, Windows Vista, Windows XP, Windows Server 2012, Windows Server 2008, Windows Server 2003

    See Also